src: drop dead and duplicate function declarations

Four declarations named functions that have no definition anywhere, so
they were never exported (absent from libhttrack.so) and any caller
would fail to link: htswrap_set_userdef and htswrap_get_userdef (the
live path is the CHAIN_FUNCTION ARGUMENT with CALLBACKARG_USERDEF),
antislash_unescaped, and the internal liens_record. escape_remove_control
was additionally declared twice in httrack-library.h; the documented
declaration stays, the bare duplicate goes.

Header-only cleanup. The exported symbol set is unchanged (verified with
nm -D), so this is not an ABI break and needs no soname bump.

Found while documenting the public API (#382).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Xavier Roche <roche@httrack.com>

.gitignore

@@ -0,0 +1,41 @@
+# Generated by autoreconf/bootstrap (run ./bootstrap after a fresh clone).
+# Release tarballs ("make dist") ship these; the git tree does not.
+/configure
+/config.h.in
+/config.h.in~
+/aclocal.m4
+/ltmain.sh
+/libtool
+/config.guess
+/config.sub
+/install-sh
+/missing
+/depcomp
+/compile
+/ar-lib
+/test-driver
+/autom4te.cache/
+/m4/libtool.m4
+/m4/lt*.m4
+Makefile.in
+
+# Generated by configure / make.
+/config.h
+/config.log
+/config.status
+/stamp-h1
+Makefile
+.deps/
+.libs/
+*.o
+*.lo
+*.la
+*.so
+*.so.*
+*.a
+
+# make dist output.
+/httrack-*.tar.gz
+
+# Editor / autotools backup files.
+*~

AGENTS.md

@@ -5,13 +5,18 @@ the operational checklist: toolchain, invariants, and how to ship a change.
 
 ## Build & test
 - Fresh clone first: `git submodule update --init src/coucal`
-- `bash configure && make && make check`
+- `./bootstrap` (regenerates `configure` via `autoreconf`; needs autoconf,
+  automake, libtool), then `bash configure && make && make check`. Or run
+  `sh build.sh` to do bootstrap + configure + make in one shot.
 
 ## Hard invariants
-- **Toolchain edit** (`configure.ac`, any `Makefile.am`, `m4/`) → run
-  `autoreconf -fi` and commit the regenerated tracked files. The repo ships the
-  generated `configure`/`Makefile.in` so users build without autotools; CI does
-  **not** catch staleness.
+- **Generated autotools files are NOT in git.** `configure`, every
+  `Makefile.in`, `config.h.in`, `ltmain.sh`, `config.guess/sub`, and the aux
+  scripts are build products: `.gitignore`d, regenerated by `./bootstrap`, and
+  shipped only in `make dist` tarballs (so tarball users still need no
+  autotools). Never commit them. After editing `configure.ac`, any
+  `Makefile.am`, or `m4/`, just commit those sources — re-run `./bootstrap`
+  locally to rebuild and test, but do not stage the regenerated output.
 - **Format only changed lines** with `git clang-format` (clang-format 19). Never
   reformat untouched code: the engine was formatted by an old tool and won't
   round-trip.

INSTALL.Linux

@@ -7,4 +7,15 @@ On most systems (including GNU/Linux), installing can be easily achieved using t
 -or- (if not compiling as root)
 ./configure --prefix=$HOME && make && make install
 
+Building from a git checkout (not a release tarball) first needs the build
+system regenerated, which requires autoconf, automake and libtool:
+
+./bootstrap
+./configure && make && make install
+
+You can also use the one-shot wrapper, which runs bootstrap, configure and make
+(extra arguments are passed to configure):
+
+./build.sh --prefix=$HOME
+
 See also the INSTALL generic help file.

Makefile.am

@@ -5,7 +5,8 @@ ACLOCAL_AMFLAGS = -I m4
 
 EXTRA_DIST = INSTALL.Linux \
 		gpl-fr.txt license.txt greetings.txt history.txt \
-		httrack-doc.html lang.def README.md tools/mkdeb.sh
+		httrack-doc.html lang.def README.md tools/mkdeb.sh \
+		bootstrap build.sh
 
 # Build the signed Debian packages from a clean source export. Pass the signing
 # key and other options through DEB_FLAGS, e.g.:

Makefile.in

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README.md

@@ -22,8 +22,22 @@ HTTrack can also update an existing mirrored site, and resume interrupted downlo
 http://www.httrack.com/
 
 ## Compile trunk release
+
+A git checkout ships only the autotools sources, so `./bootstrap` (which runs
+`autoreconf`) regenerates `configure` first; this needs autoconf, automake and
+libtool. Released tarballs already include `configure`, so building from a
+tarball skips `./bootstrap`.
+
 ```sh
 git clone https://github.com/xroche/httrack.git --recurse-submodules
 cd httrack
+./bootstrap
 ./configure --prefix=$HOME/usr && make -j8 && make install
 ```
+
+Or use the one-shot wrapper (bootstrap + configure + make), which forwards its
+arguments to `configure`:
+
+```sh
+./build.sh --prefix=$HOME/usr
+```

bootstrap

@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# Regenerate the autotools build system (configure, Makefile.in, config.h.in,
+# libtool, the aux scripts) from configure.ac and the Makefile.am files.
+#
+# Run this once after a fresh git clone, before ./configure. Release tarballs
+# (made with "make dist") already ship these files, so people building from a
+# tarball do not need autotools and do not run this.
+#
+# Requires: autoconf, automake, libtool (the autoreconf toolchain).
+
+set -e
+
+# shellcheck disable=SC1007  # "CDPATH= cd" is a deliberate empty-CDPATH prefix.
+srcdir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+cd "$srcdir"
+
+if ! command -v autoreconf >/dev/null 2>&1; then
+    echo "bootstrap: autoreconf not found; install autoconf, automake and libtool" >&2
+    echo "           (or build from a release tarball, which ships ./configure)" >&2
+    exit 1
+fi
+
+exec autoreconf -fi "$@"

build.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+#
+# One-shot build from a git checkout: bootstrap (autoreconf) -> configure -> make.
+# A convenience wrapper; the canonical steps are ./bootstrap && ./configure && make.
+#
+# Extra arguments are passed straight to ./configure, e.g.
+#   ./build.sh --prefix="$HOME" --disable-https
+#
+# Build out of tree (recommended; required if the source tree is read-only or
+# mounted noexec) by pointing BUILD_DIR at a scratch directory:
+#   BUILD_DIR=/var/tmp/httrack-build ./build.sh
+#
+# On a noexec filesystem the executable bit does not take effect, so invoke the
+# script explicitly with sh:  sh build.sh
+#
+# Requires autoconf/automake/libtool (for bootstrap); the release tarball ships
+# ./configure, so from a tarball just run ./configure && make.
+
+set -e
+
+# shellcheck disable=SC1007  # "CDPATH= cd" is a deliberate empty-CDPATH prefix.
+srcdir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+
+# 1. Regenerate the build system in the source tree (autotools requires it).
+sh "$srcdir/bootstrap"
+
+# 2. Configure and build, out of tree when BUILD_DIR is set.
+builddir=${BUILD_DIR:-$srcdir}
+mkdir -p "$builddir"
+cd "$builddir"
+# Invoke configure via the shell, not execve: it is a portable sh script, and a
+# noexec source tree (or a cleared executable bit) would make ./configure fail.
+"${CONFIG_SHELL:-/bin/sh}" "$srcdir/configure" "$@"
+make

compile

@@ -1,351 +0,0 @@
-#! /bin/sh
-# Wrapper for compilers which do not understand '-c -o'.
-
-scriptversion=2024-06-19.01; # UTC
-
-# Copyright (C) 1999-2024 Free Software Foundation, Inc.
-# Written by Tom Tromey <tromey@cygnus.com>.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# This file is maintained in Automake, please report
-# bugs to <bug-automake@gnu.org> or send patches to
-# <automake-patches@gnu.org>.
-
-nl='
-'
-
-# We need space, tab and new line, in precisely that order.  Quoting is
-# there to prevent tools from complaining about whitespace usage.
-IFS=" ""	$nl"
-
-file_conv=
-
-# func_file_conv build_file lazy
-# Convert a $build file to $host form and store it in $file
-# Currently only supports Windows hosts. If the determined conversion
-# type is listed in (the comma separated) LAZY, no conversion will
-# take place.
-func_file_conv ()
-{
-  file=$1
-  case $file in
-    / | /[!/]*) # absolute file, and not a UNC file
-      if test -z "$file_conv"; then
-	# lazily determine how to convert abs files
-	case `uname -s` in
-	  MINGW*)
-	    file_conv=mingw
-	    ;;
-	  CYGWIN* | MSYS*)
-	    file_conv=cygwin
-	    ;;
-	  *)
-	    file_conv=wine
-	    ;;
-	esac
-      fi
-      case $file_conv/,$2, in
-	*,$file_conv,*)
-	  ;;
-	mingw/*)
-	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
-	  ;;
-	cygwin/* | msys/*)
-	  file=`cygpath -m "$file" || echo "$file"`
-	  ;;
-	wine/*)
-	  file=`winepath -w "$file" || echo "$file"`
-	  ;;
-      esac
-      ;;
-  esac
-}
-
-# func_cl_dashL linkdir
-# Make cl look for libraries in LINKDIR
-func_cl_dashL ()
-{
-  func_file_conv "$1"
-  if test -z "$lib_path"; then
-    lib_path=$file
-  else
-    lib_path="$lib_path;$file"
-  fi
-  linker_opts="$linker_opts -LIBPATH:$file"
-}
-
-# func_cl_dashl library
-# Do a library search-path lookup for cl
-func_cl_dashl ()
-{
-  lib=$1
-  found=no
-  save_IFS=$IFS
-  IFS=';'
-  for dir in $lib_path $LIB
-  do
-    IFS=$save_IFS
-    if $shared && test -f "$dir/$lib.dll.lib"; then
-      found=yes
-      lib=$dir/$lib.dll.lib
-      break
-    fi
-    if test -f "$dir/$lib.lib"; then
-      found=yes
-      lib=$dir/$lib.lib
-      break
-    fi
-    if test -f "$dir/lib$lib.a"; then
-      found=yes
-      lib=$dir/lib$lib.a
-      break
-    fi
-  done
-  IFS=$save_IFS
-
-  if test "$found" != yes; then
-    lib=$lib.lib
-  fi
-}
-
-# func_cl_wrapper cl arg...
-# Adjust compile command to suit cl
-func_cl_wrapper ()
-{
-  # Assume a capable shell
-  lib_path=
-  shared=:
-  linker_opts=
-  for arg
-  do
-    if test -n "$eat"; then
-      eat=
-    else
-      case $1 in
-	-o)
-	  # configure might choose to run compile as 'compile cc -o foo foo.c'.
-	  eat=1
-	  case $2 in
-	    *.o | *.lo | *.[oO][bB][jJ])
-	      func_file_conv "$2"
-	      set x "$@" -Fo"$file"
-	      shift
-	      ;;
-	    *)
-	      func_file_conv "$2"
-	      set x "$@" -Fe"$file"
-	      shift
-	      ;;
-	  esac
-	  ;;
-	-I)
-	  eat=1
-	  func_file_conv "$2" mingw
-	  set x "$@" -I"$file"
-	  shift
-	  ;;
-	-I*)
-	  func_file_conv "${1#-I}" mingw
-	  set x "$@" -I"$file"
-	  shift
-	  ;;
-	-l)
-	  eat=1
-	  func_cl_dashl "$2"
-	  set x "$@" "$lib"
-	  shift
-	  ;;
-	-l*)
-	  func_cl_dashl "${1#-l}"
-	  set x "$@" "$lib"
-	  shift
-	  ;;
-	-L)
-	  eat=1
-	  func_cl_dashL "$2"
-	  ;;
-	-L*)
-	  func_cl_dashL "${1#-L}"
-	  ;;
-	-static)
-	  shared=false
-	  ;;
-	-Wl,*)
-	  arg=${1#-Wl,}
-	  save_ifs="$IFS"; IFS=','
-	  for flag in $arg; do
-	    IFS="$save_ifs"
-	    linker_opts="$linker_opts $flag"
-	  done
-	  IFS="$save_ifs"
-	  ;;
-	-Xlinker)
-	  eat=1
-	  linker_opts="$linker_opts $2"
-	  ;;
-	-*)
-	  set x "$@" "$1"
-	  shift
-	  ;;
-	*.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
-	  func_file_conv "$1"
-	  set x "$@" -Tp"$file"
-	  shift
-	  ;;
-	*.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
-	  func_file_conv "$1" mingw
-	  set x "$@" "$file"
-	  shift
-	  ;;
-	*)
-	  set x "$@" "$1"
-	  shift
-	  ;;
-      esac
-    fi
-    shift
-  done
-  if test -n "$linker_opts"; then
-    linker_opts="-link$linker_opts"
-  fi
-  exec "$@" $linker_opts
-  exit 1
-}
-
-eat=
-
-case $1 in
-  '')
-     echo "$0: No command.  Try '$0 --help' for more information." 1>&2
-     exit 1;
-     ;;
-  -h | --h*)
-    cat <<\EOF
-Usage: compile [--help] [--version] PROGRAM [ARGS]
-
-Wrapper for compilers which do not understand '-c -o'.
-Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
-arguments, and rename the output as expected.
-
-If you are trying to build a whole package this is not the
-right script to run: please start by reading the file 'INSTALL'.
-
-Report bugs to <bug-automake@gnu.org>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>.
-EOF
-    exit $?
-    ;;
-  -v | --v*)
-    echo "compile (GNU Automake) $scriptversion"
-    exit $?
-    ;;
-  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe | \
-  clang-cl | *[/\\]clang-cl | clang-cl.exe | *[/\\]clang-cl.exe | \
-  icl | *[/\\]icl | icl.exe | *[/\\]icl.exe )
-    func_cl_wrapper "$@"      # Doesn't return...
-    ;;
-esac
-
-ofile=
-cfile=
-
-for arg
-do
-  if test -n "$eat"; then
-    eat=
-  else
-    case $1 in
-      -o)
-	# configure might choose to run compile as 'compile cc -o foo foo.c'.
-	# So we strip '-o arg' only if arg is an object.
-	eat=1
-	case $2 in
-	  *.o | *.obj)
-	    ofile=$2
-	    ;;
-	  *)
-	    set x "$@" -o "$2"
-	    shift
-	    ;;
-	esac
-	;;
-      *.c)
-	cfile=$1
-	set x "$@" "$1"
-	shift
-	;;
-      *)
-	set x "$@" "$1"
-	shift
-	;;
-    esac
-  fi
-  shift
-done
-
-if test -z "$ofile" || test -z "$cfile"; then
-  # If no '-o' option was seen then we might have been invoked from a
-  # pattern rule where we don't need one.  That is ok -- this is a
-  # normal compilation that the losing compiler can handle.  If no
-  # '.c' file was seen then we are probably linking.  That is also
-  # ok.
-  exec "$@"
-fi
-
-# Name of file we expect compiler to create.
-cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
-
-# Create the lock directory.
-# Note: use '[/\\:.-]' here to ensure that we don't use the same name
-# that we are using for the .o file.  Also, base the name on the expected
-# object file name, since that is what matters with a parallel build.
-lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
-while true; do
-  if mkdir "$lockdir" >/dev/null 2>&1; then
-    break
-  fi
-  sleep 1
-done
-# FIXME: race condition here if user kills between mkdir and trap.
-trap "rmdir '$lockdir'; exit 1" 1 2 15
-
-# Run the compile.
-"$@"
-ret=$?
-
-if test -f "$cofile"; then
-  test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
-elif test -f "${cofile}bj"; then
-  test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
-fi
-
-rmdir "$lockdir"
-exit $ret
-
-# Local Variables:
-# mode: shell-script
-# sh-indentation: 2
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:

config.h.in

@@ -1,222 +0,0 @@
-/* config.h.in.  Generated from configure.ac by autoheader.  */
-
-/* Check for dlopen in c */
-#undef DLLIB
-
-/* Define if pointers to integers require aligned access */
-#undef HAVE_ALIGNED_ACCESS_REQUIRED
-
-/* Define to 1 if you have the <dlfcn.h> header file. */
-#undef HAVE_DLFCN_H
-
-/* Define to 1 if you have the <execinfo.h> header file. */
-#undef HAVE_EXECINFO_H
-
-/* Define to 1 if you have the <inttypes.h> header file. */
-#undef HAVE_INTTYPES_H
-
-/* Define to 1 if you have the 'z' library (-lz). */
-#undef HAVE_LIBZ
-
-/* Define to 1 if you have the <minix/config.h> header file. */
-#undef HAVE_MINIX_CONFIG_H
-
-/* Define to 1 if you have the 'snprintf' function. */
-#undef HAVE_SNPRINTF
-
-/* Define to 1 if you have the <stdint.h> header file. */
-#undef HAVE_STDINT_H
-
-/* Define to 1 if you have the <stdio.h> header file. */
-#undef HAVE_STDIO_H
-
-/* Define to 1 if you have the <stdlib.h> header file. */
-#undef HAVE_STDLIB_H
-
-/* Define to 1 if you have the <strings.h> header file. */
-#undef HAVE_STRINGS_H
-
-/* Define to 1 if you have the <string.h> header file. */
-#undef HAVE_STRING_H
-
-/* Check for strnlen */
-#undef HAVE_STRNLEN
-
-/* Define to 1 if you have the <sys/stat.h> header file. */
-#undef HAVE_SYS_STAT_H
-
-/* Define to 1 if you have the <sys/types.h> header file. */
-#undef HAVE_SYS_TYPES_H
-
-/* Define to 1 if you have the <unistd.h> header file. */
-#undef HAVE_UNISTD_H
-
-/* Define to 1 or 0, depending whether the compiler supports simple visibility
-   declarations. */
-#undef HAVE_VISIBILITY
-
-/* Define to 1 if you have the 'vsnprintf' function. */
-#undef HAVE_VSNPRINTF
-
-/* Define to 1 if you have the <wchar.h> header file. */
-#undef HAVE_WCHAR_H
-
-/* Check for in_addr_t */
-#undef HTS_DO_NOT_REDEFINE_in_addr_t
-
-/* Check for IPv6 */
-#undef HTS_INET6
-
-/* Check for large files support */
-#undef HTS_LFS
-
-/* Check for OpenSSL */
-#undef HTS_USEOPENSSL
-
-/* Check for libiconv */
-#undef LIBICONV
-
-/* Check for libsocket */
-#undef LIBSOCKET
-
-/* Define to the sub-directory where libtool stores uninstalled libraries. */
-#undef LT_OBJDIR
-
-/* Name of package */
-#undef PACKAGE
-
-/* Define to the address where bug reports for this package should be sent. */
-#undef PACKAGE_BUGREPORT
-
-/* Define to the full name of this package. */
-#undef PACKAGE_NAME
-
-/* Define to the full name and version of this package. */
-#undef PACKAGE_STRING
-
-/* Define to the one symbol short name of this package. */
-#undef PACKAGE_TARNAME
-
-/* Define to the home page for this package. */
-#undef PACKAGE_URL
-
-/* Define to the version of this package. */
-#undef PACKAGE_VERSION
-
-/* "enable replacement (v)snprintf if system (v)snprintf is broken" */
-#undef PREFER_PORTABLE_SNPRINTF
-
-/* Check for setuid */
-#undef SETUID
-
-/* The size of 'long long', as computed by sizeof. */
-#undef SIZEOF_LONG_LONG
-
-/* Define to 1 if all of the C89 standard headers exist (not just the ones
-   required in a freestanding environment). This macro is provided for
-   backward compatibility; new code need not use it. */
-#undef STDC_HEADERS
-
-/* Check for pthread in pthreads */
-#undef THREADS
-
-/* Enable extensions on AIX, Interix, z/OS.  */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-/* Enable general extensions on macOS.  */
-#ifndef _DARWIN_C_SOURCE
-# undef _DARWIN_C_SOURCE
-#endif
-/* Enable general extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# undef __EXTENSIONS__
-#endif
-/* Enable GNU extensions on systems that have them.  */
-#ifndef _GNU_SOURCE
-# undef _GNU_SOURCE
-#endif
-/* Enable X/Open compliant socket functions that do not require linking
-   with -lxnet on HP-UX 11.11.  */
-#ifndef _HPUX_ALT_XOPEN_SOCKET_API
-# undef _HPUX_ALT_XOPEN_SOCKET_API
-#endif
-/* Identify the host operating system as Minix.
-   This macro does not affect the system headers' behavior.
-   A future release of Autoconf may stop defining this macro.  */
-#ifndef _MINIX
-# undef _MINIX
-#endif
-/* Enable general extensions on NetBSD.
-   Enable NetBSD compatibility extensions on Minix.  */
-#ifndef _NETBSD_SOURCE
-# undef _NETBSD_SOURCE
-#endif
-/* Enable OpenBSD compatibility extensions on NetBSD.
-   Oddly enough, this does nothing on OpenBSD.  */
-#ifndef _OPENBSD_SOURCE
-# undef _OPENBSD_SOURCE
-#endif
-/* Define to 1 if needed for POSIX-compatible behavior.  */
-#ifndef _POSIX_SOURCE
-# undef _POSIX_SOURCE
-#endif
-/* Define to 2 if needed for POSIX-compatible behavior.  */
-#ifndef _POSIX_1_SOURCE
-# undef _POSIX_1_SOURCE
-#endif
-/* Enable POSIX-compatible threading on Solaris.  */
-#ifndef _POSIX_PTHREAD_SEMANTICS
-# undef _POSIX_PTHREAD_SEMANTICS
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-5:2014.  */
-#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
-# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
-#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
-# undef __STDC_WANT_IEC_60559_BFP_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
-#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
-# undef __STDC_WANT_IEC_60559_DFP_EXT__
-#endif
-/* Enable extensions specified by C23 Annex F.  */
-#ifndef __STDC_WANT_IEC_60559_EXT__
-# undef __STDC_WANT_IEC_60559_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
-#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
-# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
-#endif
-/* Enable extensions specified by C23 Annex H and ISO/IEC TS 18661-3:2015.  */
-#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
-# undef __STDC_WANT_IEC_60559_TYPES_EXT__
-#endif
-/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
-#ifndef __STDC_WANT_LIB_EXT2__
-# undef __STDC_WANT_LIB_EXT2__
-#endif
-/* Enable extensions specified by ISO/IEC 24747:2009.  */
-#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
-# undef __STDC_WANT_MATH_SPEC_FUNCS__
-#endif
-/* Enable extensions on HP NonStop.  */
-#ifndef _TANDEM_SOURCE
-# undef _TANDEM_SOURCE
-#endif
-/* Enable X/Open extensions.  Define to 500 only if necessary
-   to make mbstate_t available.  */
-#ifndef _XOPEN_SOURCE
-# undef _XOPEN_SOURCE
-#endif
-
-
-/* Version number of package */
-#undef VERSION
-
-/* in_port_t */
-#undef in_port_t
-
-/* sa_family_t */
-#undef sa_family_t

depcomp

@@ -1,792 +0,0 @@
-#! /bin/sh
-# depcomp - compile a program generating dependencies as side-effects
-
-scriptversion=2024-06-19.01; # UTC
-
-# Copyright (C) 1999-2024 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
-
-case $1 in
-  '')
-    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
-    exit 1;
-    ;;
-  -h | --h*)
-    cat <<\EOF
-Usage: depcomp [--help] [--version] PROGRAM [ARGS]
-
-Run PROGRAMS ARGS to compile a file, generating dependencies
-as side-effects.
-
-Environment variables:
-  depmode     Dependency tracking mode.
-  source      Source file read by 'PROGRAMS ARGS'.
-  object      Object file output by 'PROGRAMS ARGS'.
-  DEPDIR      directory where to store dependencies.
-  depfile     Dependency file to output.
-  tmpdepfile  Temporary file to use when outputting dependencies.
-  libtool     Whether libtool is used (yes/no).
-
-Report bugs to <bug-automake@gnu.org>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>.
-EOF
-    exit $?
-    ;;
-  -v | --v*)
-    echo "depcomp (GNU Automake) $scriptversion"
-    exit $?
-    ;;
-esac
-
-# Get the directory component of the given path, and save it in the
-# global variables '$dir'.  Note that this directory component will
-# be either empty or ending with a '/' character.  This is deliberate.
-set_dir_from ()
-{
-  case $1 in
-    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
-      *) dir=;;
-  esac
-}
-
-# Get the suffix-stripped basename of the given path, and save it the
-# global variable '$base'.
-set_base_from ()
-{
-  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
-}
-
-# If no dependency file was actually created by the compiler invocation,
-# we still have to create a dummy depfile, to avoid errors with the
-# Makefile "include basename.Plo" scheme.
-make_dummy_depfile ()
-{
-  echo "#dummy" > "$depfile"
-}
-
-# Factor out some common post-processing of the generated depfile.
-# Requires the auxiliary global variable '$tmpdepfile' to be set.
-aix_post_process_depfile ()
-{
-  # If the compiler actually managed to produce a dependency file,
-  # post-process it.
-  if test -f "$tmpdepfile"; then
-    # Each line is of the form 'foo.o: dependency.h'.
-    # Do two passes, one to just change these to
-    #   $object: dependency.h
-    # and one to simply output
-    #   dependency.h:
-    # which is needed to avoid the deleted-header problem.
-    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
-      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
-    } > "$depfile"
-    rm -f "$tmpdepfile"
-  else
-    make_dummy_depfile
-  fi
-}
-
-# A tabulation character.
-tab='	'
-# A newline character.
-nl='
-'
-# Character ranges might be problematic outside the C locale.
-# These definitions help.
-upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
-lower=abcdefghijklmnopqrstuvwxyz
-alpha=${upper}${lower}
-
-if test -z "$depmode" || test -z "$source" || test -z "$object"; then
-  echo "depcomp: Variables source, object and depmode must be set" 1>&2
-  exit 1
-fi
-
-# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
-depfile=${depfile-`echo "$object" |
-  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
-tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
-
-rm -f "$tmpdepfile"
-
-# Avoid interference from the environment.
-gccflag= dashmflag=
-
-# Some modes work just like other modes, but use different flags.  We
-# parameterize here, but still list the modes in the big case below,
-# to make depend.m4 easier to write.  Note that we *cannot* use a case
-# here, because this file can only contain one case statement.
-if test "$depmode" = hp; then
-  # HP compiler uses -M and no extra arg.
-  gccflag=-M
-  depmode=gcc
-fi
-
-if test "$depmode" = dashXmstdout; then
-  # This is just like dashmstdout with a different argument.
-  dashmflag=-xM
-  depmode=dashmstdout
-fi
-
-cygpath_u="cygpath -u -f -"
-if test "$depmode" = msvcmsys; then
-  # This is just like msvisualcpp but w/o cygpath translation.
-  # Just convert the backslash-escaped backslashes to single forward
-  # slashes to satisfy depend.m4
-  cygpath_u='sed s,\\\\,/,g'
-  depmode=msvisualcpp
-fi
-
-if test "$depmode" = msvc7msys; then
-  # This is just like msvc7 but w/o cygpath translation.
-  # Just convert the backslash-escaped backslashes to single forward
-  # slashes to satisfy depend.m4
-  cygpath_u='sed s,\\\\,/,g'
-  depmode=msvc7
-fi
-
-if test "$depmode" = xlc; then
-  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
-  gccflag=-qmakedep=gcc,-MF
-  depmode=gcc
-fi
-
-case "$depmode" in
-gcc3)
-## gcc 3 implements dependency tracking that does exactly what
-## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
-## it if -MD -MP comes after the -MF stuff.  Hmm.
-## Unfortunately, FreeBSD c89 acceptance of flags depends upon
-## the command line argument order; so add the flags where they
-## appear in depend2.am.  Note that the slowdown incurred here
-## affects only configure: in makefiles, %FASTDEP% shortcuts this.
-  for arg
-  do
-    case $arg in
-    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
-    *)  set fnord "$@" "$arg" ;;
-    esac
-    shift # fnord
-    shift # $arg
-  done
-  "$@"
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  mv "$tmpdepfile" "$depfile"
-  ;;
-
-gcc)
-## Note that this doesn't just cater to obsolete pre-3.x GCC compilers.
-## but also to in-use compilers like IBM xlc/xlC and the HP C compiler.
-## (see the conditional assignment to $gccflag above).
-## There are various ways to get dependency output from gcc.  Here's
-## why we pick this rather obscure method:
-## - Don't want to use -MD because we'd like the dependencies to end
-##   up in a subdir.  Having to rename by hand is ugly.
-##   (We might end up doing this anyway to support other compilers.)
-## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
-##   -MM, not -M (despite what the docs say).  Also, it might not be
-##   supported by the other compilers which use the 'gcc' depmode.
-## - Using -M directly means running the compiler twice (even worse
-##   than renaming).
-  if test -z "$gccflag"; then
-    gccflag=-MD,
-  fi
-  "$@" -Wp,"$gccflag$tmpdepfile"
-  stat=$?
-  if test $stat -ne 0; then
-    rm -f "$tmpdepfile"
-    exit $stat
-  fi
-  rm -f "$depfile"
-  echo "$object : \\" > "$depfile"
-  # The second -e expression handles DOS-style file names with drive
-  # letters.
-  sed -e 's/^[^:]*: / /' \
-      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
-## This next piece of magic avoids the "deleted header file" problem.
-## The problem is that when a header file which appears in a .P file
-## is deleted, the dependency causes make to die (because there is
-## typically no way to rebuild the header).  We avoid this by adding
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-sgi)
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install-sh

@@ -1,541 +0,0 @@
-#!/bin/sh
-# install - install a program, script, or datafile
-
-scriptversion=2024-06-19.01; # UTC
-
-# This originates from X11R5 (mit/util/scripts/install.sh), which was
-# later released in X11R6 (xc/config/util/install.sh) with the
-# following copyright and license.
-#
-# Copyright (C) 1994 X Consortium
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to
-# deal in the Software without restriction, including without limitation the
-# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
-# sell copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
-# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#
-# Except as contained in this notice, the name of the X Consortium shall not
-# be used in advertising or otherwise to promote the sale, use or other deal-
-# ings in this Software without prior written authorization from the X Consor-
-# tium.
-#
-#
-# FSF changes to this file are in the public domain.
-#
-# Calling this script install-sh is preferred over install.sh, to prevent
-# 'make' implicit rules from creating a file called install from it
-# when there is no Makefile.
-#
-# This script is compatible with the BSD install script, but was written
-# from scratch.
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-# Set DOITPROG to "echo" to test this script.
-
-doit=${DOITPROG-}
-doit_exec=${doit:-exec}
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-
-chgrpprog=${CHGRPPROG-chgrp}
-chmodprog=${CHMODPROG-chmod}
-chownprog=${CHOWNPROG-chown}
-cmpprog=${CMPPROG-cmp}
-cpprog=${CPPROG-cp}
-mkdirprog=${MKDIRPROG-mkdir}
-mvprog=${MVPROG-mv}
-rmprog=${RMPROG-rm}
-stripprog=${STRIPPROG-strip}
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-posix_mkdir=
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-usage="\
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-   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
-   or: $0 [OPTION]... -d DIRECTORIES...
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-In the 1st form, copy SRCFILE to DSTFILE.
-In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
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-Options:
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-  -c            (ignored)
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-	  if test -d $$d/$$file; then \
-	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
-	    if test -d "$(distdir)/$$file"; then \
-	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
-	    fi; \
-	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
-	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
-	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
-	    fi; \
-	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
-	  else \
-	    test -f "$(distdir)/$$file" \
-	    || cp -p $$d/$$file "$(distdir)/$$file" \
-	    || exit 1; \
-	  fi; \
-	done
-check-am: all-am
-check: check-am
-all-am: Makefile $(MANS)
-installdirs:
-	for dir in "$(DESTDIR)$(man1dir)"; do \
-	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
-	done
-install: install-am
-install-exec: install-exec-am
-install-data: install-data-am
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-
-install-am: all-am
-	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
-
-installcheck: installcheck-am
-install-strip:
-	if test -z '$(STRIP)'; then \
-	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
-	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
-	      install; \
-	else \
-	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
-	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
-	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
-	fi
-mostlyclean-generic:
-
-clean-generic:
-
-distclean-generic:
-	-$(am__rm_f) $(CONFIG_CLEAN_FILES)
-	-test . = "$(srcdir)" || $(am__rm_f) $(CONFIG_CLEAN_VPATH_FILES)
-
-maintainer-clean-generic:
-	@echo "This command is intended for maintainers to use"
-	@echo "it deletes files that may require special tools to rebuild."
-clean: clean-am
-
-clean-am: clean-generic clean-libtool mostlyclean-am
-
-distclean: distclean-am
-	-rm -f Makefile
-distclean-am: clean-am distclean-generic
-
-dvi: dvi-am
-
-dvi-am:
-
-html: html-am
-
-html-am:
-
-info: info-am
-
-info-am:
-
-install-data-am: install-man
-
-install-dvi: install-dvi-am
-
-install-dvi-am:
-
-install-exec-am:
-
-install-html: install-html-am
-
-install-html-am:
-
-install-info: install-info-am
-
-install-info-am:
-
-install-man: install-man1
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-install-pdf: install-pdf-am
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-
-install-ps: install-ps-am
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-install-ps-am:
-
-installcheck-am:
-
-maintainer-clean: maintainer-clean-am
-	-rm -f Makefile
-maintainer-clean-am: distclean-am maintainer-clean-generic
-
-mostlyclean: mostlyclean-am
-
-mostlyclean-am: mostlyclean-generic mostlyclean-libtool
-
-pdf: pdf-am
-
-pdf-am:
-
-ps: ps-am
-
-ps-am:
-
-uninstall-am: uninstall-man
-
-uninstall-man: uninstall-man1
-
-.MAKE: install-am install-strip
-
-.PHONY: all all-am check check-am clean clean-generic clean-libtool \
-	cscopelist-am ctags-am distclean distclean-generic \
-	distclean-libtool distdir dvi dvi-am html html-am info info-am \
-	install install-am install-data install-data-am install-dvi \
-	install-dvi-am install-exec install-exec-am install-html \
-	install-html-am install-info install-info-am install-man \
-	install-man1 install-pdf install-pdf-am install-ps \
-	install-ps-am install-strip installcheck installcheck-am \
-	installdirs maintainer-clean maintainer-clean-generic \
-	mostlyclean mostlyclean-generic mostlyclean-libtool pdf pdf-am \
-	ps ps-am tags-am uninstall uninstall-am uninstall-man \
-	uninstall-man1
-
-.PRECIOUS: Makefile
-
-
-# Regenerate httrack.1 from the "httrack --help" output and the top-level
-# README. Run by hand after changing options or help text:
-#   make -C man regen-man
-# The generated page is committed; this target only refreshes it. Honors
-# SOURCE_DATE_EPOCH for a reproducible date.
-regen-man: makeman.sh $(top_builddir)/src/httrack$(EXEEXT)
-	README='$(top_srcdir)/README' $(SHELL) $(srcdir)/makeman.sh \
-		'$(top_builddir)/src/httrack$(EXEEXT)' > $(srcdir)/httrack.1
-.PHONY: regen-man
-
-# Render html/httrack.man.html from httrack.1. Needs the groff html device
-# (Debian: full "groff" package, not "groff-base"). Run by hand: make -C man regen-man-html
-regen-man-html: httrack.1
-	groff -t -man -Thtml $(srcdir)/httrack.1 > $(top_srcdir)/html/httrack.man.html
-.PHONY: regen-man-html
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:
-
-# Tell GNU make to disable its built-in pattern rules.
-%:: %,v
-%:: RCS/%,v
-%:: RCS/%
-%:: s.%
-%:: SCCS/s.%

missing

@@ -1,236 +0,0 @@
-#! /bin/sh
-# Common wrapper for a few potentially missing GNU and other programs.
-
-scriptversion=2024-06-07.14; # UTC
-
-# shellcheck disable=SC2006,SC2268 # we must support pre-POSIX shells
-
-# Copyright (C) 1996-2024 Free Software Foundation, Inc.
-# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-if test $# -eq 0; then
-  echo 1>&2 "Try '$0 --help' for more information"
-  exit 1
-fi
-
-case $1 in
-
-  --is-lightweight)
-    # Used by our autoconf macros to check whether the available missing
-    # script is modern enough.
-    exit 0
-    ;;
-
-  --run)
-    # Back-compat with the calling convention used by older automake.
-    shift
-    ;;
-
-  -h|--h|--he|--hel|--help)
-    echo "\
-$0 [OPTION]... PROGRAM [ARGUMENT]...
-
-Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
-to PROGRAM being missing or too old.
-
-Options:
-  -h, --help      display this help and exit
-  -v, --version   output version information and exit
-
-Supported PROGRAM values:
-aclocal autoconf autogen  autoheader autom4te automake autoreconf
-bison   flex     help2man lex        makeinfo perl     yacc
-
-Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
-'g' are ignored when checking the name.
-
-Report bugs to <bug-automake@gnu.org>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>."
-    exit $?
-    ;;
-
-  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
-    echo "missing (GNU Automake) $scriptversion"
-    exit $?
-    ;;
-
-  -*)
-    echo 1>&2 "$0: unknown '$1' option"
-    echo 1>&2 "Try '$0 --help' for more information"
-    exit 1
-    ;;
-
-esac
-
-# Run the given program, remember its exit status.
-"$@"; st=$?
-
-# If it succeeded, we are done.
-test $st -eq 0 && exit 0
-
-# Also exit now if we it failed (or wasn't found), and '--version' was
-# passed; such an option is passed most likely to detect whether the
-# program is present and works.
-case $2 in --version|--help) exit $st;; esac
-
-# Exit code 63 means version mismatch.  This often happens when the user
-# tries to use an ancient version of a tool on a file that requires a
-# minimum version.
-if test $st -eq 63; then
-  msg="probably too old"
-elif test $st -eq 127; then
-  # Program was missing.
-  msg="missing on your system"
-else
-  # Program was found and executed, but failed.  Give up.
-  exit $st
-fi
-
-perl_URL=https://www.perl.org/
-flex_URL=https://github.com/westes/flex
-gnu_software_URL=https://www.gnu.org/software
-
-program_details ()
-{
-  case $1 in
-    aclocal|automake|autoreconf)
-      echo "The '$1' program is part of the GNU Automake package:"
-      echo "<$gnu_software_URL/automake>"
-      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
-      echo "<$gnu_software_URL/autoconf>"
-      echo "<$gnu_software_URL/m4/>"
-      echo "<$perl_URL>"
-      ;;
-    autoconf|autom4te|autoheader)
-      echo "The '$1' program is part of the GNU Autoconf package:"
-      echo "<$gnu_software_URL/autoconf/>"
-      echo "It also requires GNU m4 and Perl in order to run:"
-      echo "<$gnu_software_URL/m4/>"
-      echo "<$perl_URL>"
-      ;;
-    *)
-      :
-      ;;
-  esac
-}
-
-give_advice ()
-{
-  # Normalize program name to check for.
-  normalized_program=`echo "$1" | sed '
-    s/^gnu-//; t
-    s/^gnu//; t
-    s/^g//; t'`
-
-  printf '%s\n' "'$1' is $msg."
-
-  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
-  autoheader_deps="'acconfig.h'"
-  automake_deps="'Makefile.am'"
-  aclocal_deps="'acinclude.m4'"
-  case $normalized_program in
-    aclocal*)
-      echo "You should only need it if you modified $aclocal_deps or"
-      echo "$configure_deps."
-      ;;
-    autoconf*)
-      echo "You should only need it if you modified $configure_deps."
-      ;;
-    autogen*)
-      echo "You should only need it if you modified a '.def' or '.tpl' file."
-      echo "You may want to install the GNU AutoGen package:"
-      echo "<$gnu_software_URL/autogen/>"
-      ;;
-    autoheader*)
-      echo "You should only need it if you modified $autoheader_deps or"
-      echo "$configure_deps."
-      ;;
-    automake*)
-      echo "You should only need it if you modified $automake_deps or"
-      echo "$configure_deps."
-      ;;
-    autom4te*)
-      echo "You might have modified some maintainer files that require"
-      echo "the 'autom4te' program to be rebuilt."
-      ;;
-    autoreconf*)
-      echo "You should only need it if you modified $aclocal_deps or"
-      echo "$automake_deps or $autoheader_deps or $automake_deps or"
-      echo "$configure_deps."
-      ;;
-    bison*|yacc*)
-      echo "You should only need it if you modified a '.y' file."
-      echo "You may want to install the GNU Bison package:"
-      echo "<$gnu_software_URL/bison/>"
-      ;;
-    help2man*)
-      echo "You should only need it if you modified a dependency" \
-           "of a man page."
-      echo "You may want to install the GNU Help2man package:"
-      echo "<$gnu_software_URL/help2man/>"
-    ;;
-    lex*|flex*)
-      echo "You should only need it if you modified a '.l' file."
-      echo "You may want to install the Fast Lexical Analyzer package:"
-      echo "<$flex_URL>"
-      ;;
-    makeinfo*)
-      echo "You should only need it if you modified a '.texi' file, or"
-      echo "any other file indirectly affecting the aspect of the manual."
-      echo "You might want to install the Texinfo package:"
-      echo "<$gnu_software_URL/texinfo/>"
-      echo "The spurious makeinfo call might also be the consequence of"
-      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
-      echo "want to install GNU make:"
-      echo "<$gnu_software_URL/make/>"
-      ;;
-    perl*)
-      echo "You should only need it to run GNU Autoconf, GNU Automake, "
-      echo "  assorted other tools, or if you modified a Perl source file."
-      echo "You may want to install the Perl 5 language interpreter:"
-      echo "<$perl_URL>"
-      ;;
-    *)
-      echo "You might have modified some files without having the proper"
-      echo "tools for further handling them.  Check the 'README' file, it"
-      echo "often tells you about the needed prerequisites for installing"
-      echo "this package.  You may also peek at any GNU archive site, in"
-      echo "case some other package contains this missing '$1' program."
-      ;;
-  esac
-  program_details "$normalized_program"
-}
-
-give_advice "$1" | sed -e '1s/^/WARNING: /' \
-                       -e '2,$s/^/         /' >&2
-
-# Propagate the correct exit status (expected to be 127 for a program
-# not found, 63 for a program that failed due to version mismatch).
-exit $st
-
-# Local variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:

src/htsalias.c

@@ -41,25 +41,6 @@ Please visit our Website: http://www.httrack.com
 
 #define _NOT_NULL(a) ( (a!=NULL) ? (a) : "" )
 
-// COPY OF cmdl_ins in htscoremain.c
-/* Bytes left in x_argvblk from offset ptr. The offset can in principle outrun
-   the block (alias/doit.log expansion), so the copy aborts cleanly instead of
-   the subtraction wrapping to a huge unbounded size. */
-#define cmdl_room(bufsize, ptr)                                                \
-  ((ptr) < (size_t) (bufsize) ? (size_t) (bufsize) - (ptr) : 0)
-// Insert a command in the argc/argv (buff has total capacity bufsize)
-#define cmdl_ins(token, argc, argv, buff, bufsize, ptr)                        \
-  {                                                                            \
-    int i;                                                                     \
-    for (i = argc; i > 0; i--)                                                 \
-      argv[i] = argv[i - 1];                                                   \
-  }                                                                            \
-  argv[0] = (buff + ptr);                                                      \
-  strlcpybuff(argv[0], token, cmdl_room(bufsize, ptr));                        \
-  ptr += (int) (strlen(argv[0]) + 1);                                          \
-  argc++
-// END OF COPY OF cmdl_ins in htscoremain.c
-
 /*
   Aliases for command-line and config file definitions
   These definitions can be used:

src/htsalias.h

@@ -52,6 +52,34 @@ const char *opttype_value(int p);
 const char *opthelp_value(int p);
 const char *hts_gethome(void);
 void expand_home(String * str);
+
+/* Command-line argv-block builders, shared by htscoremain.c (the CLI parser)
+   and htsalias.c (config-file alias expansion). Tokens are packed back-to-back
+   into x_argvblk (total capacity bufsize); each argv[] entry points into the
+   block. cmdl_room bounds every copy: the running offset ptr can outrun the
+   block (alias / doit.log expansion outpacing the +32768 slack), so it yields
+   0 rather than a wrapped size_t and the bounded copy aborts cleanly. */
+#define cmdl_room(bufsize, ptr)                                                \
+  ((ptr) < (size_t) (bufsize) ? (size_t) (bufsize) - (ptr) : 0)
+
+/* Append a token as a new argv[argc]. */
+#define cmdl_add(token, argc, argv, buff, bufsize, ptr)                        \
+  argv[argc] = (buff + ptr);                                                   \
+  strlcpybuff(argv[argc], token, cmdl_room(bufsize, ptr));                     \
+  ptr += (int) (strlen(argv[argc]) + 1);                                       \
+  argc++
+
+/* Insert a token at argv[0], shifting the existing argc entries up by one. */
+#define cmdl_ins(token, argc, argv, buff, bufsize, ptr)                        \
+  {                                                                            \
+    int i;                                                                     \
+    for (i = argc; i > 0; i--)                                                 \
+      argv[i] = argv[i - 1];                                                   \
+  }                                                                            \
+  argv[0] = (buff + ptr);                                                      \
+  strlcpybuff(argv[0], token, cmdl_room(bufsize, ptr));                        \
+  ptr += (int) (strlen(argv[0]) + 1);                                          \
+  argc++
 #endif
 
 #endif

src/htsarrays.h

@@ -30,6 +30,12 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsarrays.h
+ *  Header-only generic dynamic array (a typed growable vector). All operations
+ *  are macros parameterized by the array lvalue A; the element type T is fixed
+ *  by the struct TypedArray(T) declares. Counts and capacities are in
+ *  elements, not bytes. The array owns its backing store: grow it via the Add/
+ *  Append/EnsureRoom macros and release it with TypedArrayFree. */
 #ifndef HTS_ARRAYS_DEFSTATIC
 #define HTS_ARRAYS_DEFSTATIC
 
@@ -39,7 +45,8 @@ Please visit our Website: http://www.httrack.com
 
 #include "htssafe.h"
 
-/* Memory allocation assertion failure */
+/* Abort (with the failed byte count) when a growth allocation fails. The
+   array macros never return an out-of-memory error; they assert and abort. */
 static void hts_record_assert_memory_failed(const size_t size) {
   fprintf(stderr, "memory allocation failed (%lu bytes)", \
           (long int) size); \
@@ -61,6 +68,8 @@ static void hts_record_assert_memory_failed(const size_t size) {
     /** Capacity. **/ \
     size_t capa;      \
   }
+
+/** Initializer for an empty array (no backing store, size and capacity 0). **/
 #define EMPTY_TYPED_ARRAY { { NULL }, 0, 0 }
 
 /** Array size, in elements. **/
@@ -84,7 +93,8 @@ static void hts_record_assert_memory_failed(const size_t size) {
 /** Size of T. **/
 #define TypedArrayWidth(A)  (sizeof(*TypedArrayElts(A)))
 
-/** Nth element of the array. **/
+/** Nth element of the array, as an lvalue. No bounds check; N must be
+    < TypedArraySize(A). **/
 #define TypedArrayNth(A, N) (TypedArrayElts(A)[N])
 
 /**

src/htsbase.h

@@ -63,12 +63,15 @@ extern "C" {
 #endif
 #include <assert.h>
 
-/* GCC extension */
+/* Compiler-portability attribute macros (no-ops on non-GCC). */
 #ifndef HTS_UNUSED
 #ifdef __GNUC__
 #define HTS_UNUSED __attribute__ ((unused))
+
 #define HTS_STATIC static __attribute__ ((unused))
+
 #define HTS_INLINE __inline__
+/* printf-style format check; fmt/arg are 1-based argument positions. */
 #define HTS_PRINTF_FUN(fmt, arg) __attribute__ ((format (printf, fmt, arg)))
 #else
 #define HTS_UNUSED
@@ -78,29 +81,37 @@ extern "C" {
 #endif
 #endif
 
+/* min/max evaluate their arguments twice; pass side-effect-free expressions. */
 #undef min
 #undef max
 #define min(a,b) ((a)>(b)?(b):(a))
+
 #define max(a,b) ((a)>(b)?(a):(b))
 
 #ifndef _WIN32
 #undef Sleep
 #define min(a,b) ((a)>(b)?(b):(a))
+
 #define max(a,b) ((a)>(b)?(a):(b))
+
+/* Win32 Sleep() shim for POSIX; argument is milliseconds. */
 #define Sleep(a) { if (((a)*1000)%1000000) usleep(((a)*1000)%1000000); if (((a)*1000)/1000000) sleep(((a)*1000)/1000000); }
 #endif
 
-// teste égalité de 2 chars, case insensitive
+/* hichar: ASCII uppercasing of one char. streql: case-insensitive equality of
+   two chars. ASCII only; not locale-aware. */
 #define hichar(a) ((((a)>='a') && ((a)<='z')) ? ((a)-('a'-'A')) : (a))
+
 #define streql(a,b) (hichar(a)==hichar(b))
 
-// caractère maj
+/* True if c is an ASCII uppercase letter. */
 #define isUpperLetter(a) ( ((a) >= 'A') && ((a) <= 'Z') )
 
-/* Library internal definictions */
+/* Library-internal only (engine translation units that define
+   HTS_INTERNAL_BYTECODE); not part of the consumer surface. */
 #ifdef HTS_INTERNAL_BYTECODE
 
-// functions
+/* Resolve a symbol in an already-loaded dynamic module. */
 #ifdef _WIN32
 #define DynamicGet(handle, sym) GetProcAddress(handle, sym)
 #else

src/htsbasenet.h

@@ -31,6 +31,11 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsbasenet.h
+    Base networking definitions: platform socket headers, the optional global
+    OpenSSL context, and the status-code/connection-state enumerations stored in
+    htsblk and lien_back. Pulled in by htsnet.h. */
+
 #ifndef HTS_DEFBASENETH
 #define HTS_DEFBASENETH
 
@@ -80,7 +85,8 @@ extern "C" {
 /* OpenSSL structure */
 #include <openssl/bio.h>
 
-/* Global SSL context */
+/** Process-wide OpenSSL client context, created lazily on first TLS use;
+    shared by all connections. NULL until initialized. */
 extern SSL_CTX *openssl_ctx;
 
 #endif

src/htsbauth.h

@@ -31,51 +31,77 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsbauth.h
+    HTTP Basic authentication storage: a per-session list of (URL-prefix,
+    credentials) pairs, plus the cookie jar that holds it. */
+
 #ifndef HTSBAUTH_DEFH
 #define HTSBAUTH_DEFH
 
 #include <sys/types.h>
 
-// robots wizard
+/** One stored credential: the longest-prefix match against a request's
+    host+path selects which auth header to send. */
 #ifndef HTS_DEF_FWSTRUCT_bauth_chain
 #define HTS_DEF_FWSTRUCT_bauth_chain
 typedef struct bauth_chain bauth_chain;
 #endif
 struct bauth_chain {
-  char prefix[1024];            /* www.foo.com/secure/ */
-  char auth[1024];              /* base-64 encoded user:pass */
-  struct bauth_chain *next;     /* next element */
+  char prefix[1024]; /* host + path prefix, e.g. www.foo.com/secure/ */
+  char auth[1024];   /* base-64 encoded user:pass (Authorization payload) */
+  struct bauth_chain *next; /* next element, NULL-terminated list */
 };
 
-// buffer pour les cookies et authentification
+/** Per-session cookie jar; also holds the basic-auth list head (auth).
+    The head node (auth) is embedded, not heap-allocated. */
 #ifndef HTS_DEF_FWSTRUCT_t_cookie
 #define HTS_DEF_FWSTRUCT_t_cookie
 typedef struct t_cookie t_cookie;
 #endif
 struct t_cookie {
-  int max_len;
-  char data[32768];
-  bauth_chain auth;
+  int max_len;      /* capacity of data[] in use */
+  char data[32768]; /* raw cookie store (NUL-terminated field list) */
+  bauth_chain auth; /* embedded head of the basic-auth list */
 };
 
 /* Library internal definictions */
 #ifdef HTS_INTERNAL_BYTECODE
 
-// cookies
+/* cookies */
 int cookie_add(t_cookie * cookie, const  char *cook_name, const  char *cook_value,
                const  char *domain, const  char *path);
+
 int cookie_del(t_cookie * cookie, const char *cook_name, const char *domain, const char *path);
+
 int cookie_load(t_cookie * cookie, const char *path, const char *name);
+
 int cookie_save(t_cookie * cookie, const char *name);
+
 void cookie_insert(char *s, size_t s_size, const char *ins);
+
 void cookie_delete(char *s, size_t s_size, size_t pos);
+
 const char *cookie_get(char *buffer, const char *cookie_base, int param);
+
 char *cookie_find(char *s, const char *cook_name, const char *domain, const char *path);
+
 char *cookie_nextfield(char *a);
 
-// basic auth
+/* basic auth */
+
+/** Register credentials (auth = base-64 user:pass) for the prefix derived from
+    adr (host) and fil (path). No-op returning 0 if cookie is NULL, allocation
+    fails, or a matching prefix is already stored; returns 1 on insertion. */
 int bauth_add(t_cookie * cookie, const char *adr, const char *fil, const char *auth);
+
+/** Return the stored base-64 credentials whose prefix matches adr+fil, or NULL
+    if none (or cookie is NULL). Returned pointer aliases the jar's bauth_chain;
+    caller must not free it. */
 char *bauth_check(t_cookie * cookie, const char *adr, const char *fil);
+
+/** Build the auth lookup key (host + path, query string stripped, truncated at
+    the last '/') from adr and fil into prefix; returns prefix. Caller must
+    supply a buffer of HTS_URLMAXSIZE * 2 bytes. */
 char *bauth_prefix(char *buffer, const char *adr, const char *fil);
 
 #endif

src/htscache_selftest.c

@@ -52,6 +52,9 @@ Please visit our Website: http://www.httrack.com
 
 #define SELFTEST_VOLUME 3000 /* number of small entries in the scale pass */
 
+/* prefix on assertion failures; set per entry point (-#A vs -#B) */
+static const char *selftest_tag = "cache-selftest";
+
 /* Open a cache session. A write session (ro=0) rotates new.zip -> old.zip and
    opens a fresh new.zip; a read session (ro=1) opens new.zip in place. */
 static void selftest_open(cache_back *cache, httrackp *opt, int ro) {
@@ -95,15 +98,13 @@ static void selftest_close(cache_back *cache) {
      that exits right after (same choice as the other -# cache subcommands) */
 }
 
-/* Store one entry. The body is copied into a private buffer (any size), so
-   callers may pass const data and cache_add never sees a cast-away qualifier;
-   it consumes everything synchronously, so the copy is freed on return. */
+/* Store one entry; the body is copied so callers may pass const data. */
 static void store_entry(httrackp *opt, cache_back *cache, const char *adr,
                         const char *fil, const char *save, int statuscode,
                         const char *msg, const char *contenttype,
                         const char *charset, const char *lastmodified,
                         const char *etag, const char *location,
-                        const char *body, size_t body_len) {
+                        const char *cdispo, const char *body, size_t body_len) {
   htsblk r;
   char locbuf[HTS_URLMAXSIZE * 2];
   char *bodycopy = NULL;
@@ -116,32 +117,30 @@ static void store_entry(httrackp *opt, cache_back *cache, const char *adr,
   strcpybuff(r.charset, charset);
   strcpybuff(r.lastmodified, lastmodified);
   strcpybuff(r.etag, etag);
+  strcpybuff(r.cdispo, cdispo);
   strcpybuff(locbuf, location);
   r.location = locbuf;
   r.is_write = 0;
-  /* an empty body must be a NULL pointer: cache_add rejects a non-NULL
-     pointer with size 0 */
+  /* an empty body must be NULL: cache_add rejects non-NULL with size 0 */
   if (body_len != 0) {
     bodycopy = malloct(body_len);
     memcpy(bodycopy, body, body_len);
     r.adr = bodycopy;
   }
-  /* all_in_cache=1: keep the body in the ZIP whatever the content-type,
-     so the read path never depends on a file on disk */
+  /* all_in_cache=1: body stays in the ZIP, so reads never need a disk file */
   cache_add(opt, cache, &r, adr, fil, save, 1, NULL);
   if (bodycopy != NULL) {
     freet(bodycopy);
   }
 }
 
-/* Read one entry back and check every field. Returns the number of
-   mismatches (0 == success). */
+/* Read one entry back and check every field. Returns the mismatch count. */
 static int check_entry(httrackp *opt, cache_back *cache, const char *adr,
                        const char *fil, int statuscode, const char *msg,
                        const char *contenttype, const char *charset,
                        const char *lastmodified, const char *etag,
-                       const char *location, const char *body,
-                       size_t body_len) {
+                       const char *location, const char *cdispo,
+                       const char *body, size_t body_len) {
   int fail = 0;
   char *locbuf = malloct(HTS_URLMAXSIZE * 2);
   htsblk r;
@@ -153,15 +152,14 @@ static int check_entry(httrackp *opt, cache_back *cache, const char *adr,
 #define CHECK_STR(field, want)                                                 \
   do {                                                                         \
     if (strcmp((field), (want)) != 0) {                                        \
-      fprintf(stderr,                                                          \
-              "cache-selftest: %s%s: " #field " is '%s', expected '%s'\n",     \
-              adr, fil, (field), (want));                                      \
+      fprintf(stderr, "%s: %s%s: " #field " is '%s', expected '%s'\n",         \
+              selftest_tag, adr, fil, (field), (want));                        \
       fail++;                                                                  \
     }                                                                          \
   } while (0)
 
   if (r.statuscode != statuscode) {
-    fprintf(stderr, "cache-selftest: %s%s: statuscode is %d, expected %d\n",
+    fprintf(stderr, "%s: %s%s: statuscode is %d, expected %d\n", selftest_tag,
             adr, fil, r.statuscode, statuscode);
     fail++;
   }
@@ -171,24 +169,23 @@ static int check_entry(httrackp *opt, cache_back *cache, const char *adr,
   CHECK_STR(r.lastmodified, lastmodified);
   CHECK_STR(r.etag, etag);
   CHECK_STR(locbuf, location);
+  CHECK_STR(r.cdispo, cdispo);
 
   if (r.size != (LLint) body_len) {
-    fprintf(stderr, "cache-selftest: %s%s: size is " LLintP ", expected %d\n",
+    fprintf(stderr, "%s: %s%s: size is " LLintP ", expected %d\n", selftest_tag,
             adr, fil, (LLint) r.size, (int) body_len);
     fail++;
   } else if (body_len != 0 &&
              (r.adr == NULL || memcmp(r.adr, body, body_len) != 0)) {
-    fprintf(stderr, "cache-selftest: %s%s: body mismatch\n", adr, fil);
+    fprintf(stderr, "%s: %s%s: body mismatch\n", selftest_tag, adr, fil);
     fail++;
   }
 
-  /* The loaded body must be NUL-terminated at [size]: cache_readex's strlen()
-     consumers (htscore.c:1046, htscache.c) rely on it, and a missing
-     terminator is a heap over-read. The buffer is malloc(size + slack), so
-     reading [size] is in bounds. */
+  /* loaded body must be NUL-terminated at [size] for cache_readex's strlen()
+     consumers; buffer is malloc(size + slack) so [size] is in bounds */
   if (r.adr != NULL && r.adr[r.size] != '\0') {
-    fprintf(stderr, "cache-selftest: %s%s: body not NUL-terminated at [size]\n",
-            adr, fil);
+    fprintf(stderr, "%s: %s%s: body not NUL-terminated at [size]\n",
+            selftest_tag, adr, fil);
     fail++;
   }
 
@@ -378,27 +375,29 @@ int cache_selftests(httrackp *opt, const char *dir) {
   /* pass 1: create everything in a single write session */
   selftest_open_for_write(&cache, opt);
 
-  /* edge cases: normal HTML page */
+  /* edge cases (cdispo "" except where noted): normal HTML page */
   store_entry(opt, &cache, "example.com", "/", "example.com/index.html", 200,
               "OK", "text/html", "utf-8", "Mon, 01 Jan 2024 00:00:00 GMT",
-              "etag-normal", "", body_index, strlen(body_index));
+              "etag-normal", "", "", body_index, strlen(body_index));
   /* redirect: empty body, empty optional fields, near-limit location */
   store_entry(opt, &cache, "example.com", "/moved", "example.com/moved.html",
               301, "Moved Permanently", "text/html", "", "", "", location_long,
-              NULL, 0);
-  /* non-HTML content-type kept in cache via all_in_cache, near-limit etag */
+              "", NULL, 0);
+  /* non-HTML content-type, near-limit etag */
   store_entry(opt, &cache, "example.com", "/api", "example.com/api.json", 200,
               "OK", "application/json", "utf-8",
-              "Tue, 02 Jan 2024 12:00:00 GMT", etag_long, "", body_api,
+              "Tue, 02 Jan 2024 12:00:00 GMT", etag_long, "", "", body_api,
               strlen(body_api));
-  /* binary body */
+  /* binary body, with a Content-Disposition */
   store_entry(opt, &cache, "example.com", "/logo", "example.com/logo.png", 200,
-              "OK", "image/png", "", "", "etag-bin", "", binary_body,
+              "OK", "image/png", "", "", "etag-bin", "",
+              "attachment; filename=\"logo.png\"", binary_body,
               sizeof(binary_body));
-  /* error status with a body and a location (non-2xx codes are cached too) */
+  /* error status with a body and a location */
   store_entry(opt, &cache, "example.com", "/gone", "example.com/gone.html", 404,
               "Not Found", "text/html", "utf-8", "", "etag-404",
-              "https://example.com/where-it-went", body_404, strlen(body_404));
+              "https://example.com/where-it-went", "", body_404,
+              strlen(body_404));
 
   /* scale: a few thousand small entries */
   for (i = 0; i < SELFTEST_VOLUME; i++) {
@@ -408,7 +407,7 @@ int cache_selftests(httrackp *opt, const char *dir) {
     sprintf(save, "example.com/v/%05d.html", i);
     sprintf(body, "<html>volume entry %d</html>", i);
     store_entry(opt, &cache, "example.com", fil, save, 200, "OK", "text/html",
-                "utf-8", "", "", "", body, strlen(body));
+                "utf-8", "", "", "", "", body, strlen(body));
   }
 
   /* compression: a few large bodies */
@@ -418,7 +417,7 @@ int cache_selftests(httrackp *opt, const char *dir) {
     sprintf(fil, "/big/%d.bin", i);
     sprintf(save, "example.com/big/%d.bin", i);
     store_entry(opt, &cache, "example.com", fil, save, 200, "OK",
-                "application/octet-stream", "", "", "", "", large_body[i],
+                "application/octet-stream", "", "", "", "", "", large_body[i],
                 large_size[i]);
   }
 
@@ -427,22 +426,24 @@ int cache_selftests(httrackp *opt, const char *dir) {
   /* pass 2: read back and verify everything round-tripped */
   selftest_open_for_read(&cache, opt);
 
-  failures += check_entry(opt, &cache, "example.com", "/", 200, "OK",
-                          "text/html", "utf-8", "Mon, 01 Jan 2024 00:00:00 GMT",
-                          "etag-normal", "", body_index, strlen(body_index));
+  failures +=
+      check_entry(opt, &cache, "example.com", "/", 200, "OK", "text/html",
+                  "utf-8", "Mon, 01 Jan 2024 00:00:00 GMT", "etag-normal", "",
+                  "", body_index, strlen(body_index));
   failures += check_entry(opt, &cache, "example.com", "/moved", 301,
                           "Moved Permanently", "text/html", "", "", "",
-                          location_long, NULL, 0);
+                          location_long, "", NULL, 0);
   failures +=
       check_entry(opt, &cache, "example.com", "/api", 200, "OK",
                   "application/json", "utf-8", "Tue, 02 Jan 2024 12:00:00 GMT",
-                  etag_long, "", body_api, strlen(body_api));
+                  etag_long, "", "", body_api, strlen(body_api));
   failures +=
       check_entry(opt, &cache, "example.com", "/logo", 200, "OK", "image/png",
-                  "", "", "etag-bin", "", binary_body, sizeof(binary_body));
+                  "", "", "etag-bin", "", "attachment; filename=\"logo.png\"",
+                  binary_body, sizeof(binary_body));
   failures += check_entry(opt, &cache, "example.com", "/gone", 404, "Not Found",
                           "text/html", "utf-8", "", "etag-404",
-                          "https://example.com/where-it-went", body_404,
+                          "https://example.com/where-it-went", "", body_404,
                           strlen(body_404));
 
   for (i = 0; i < SELFTEST_VOLUME; i++) {
@@ -452,7 +453,7 @@ int cache_selftests(httrackp *opt, const char *dir) {
     sprintf(body, "<html>volume entry %d</html>", i);
     failures +=
         check_entry(opt, &cache, "example.com", fil, 200, "OK", "text/html",
-                    "utf-8", "", "", "", body, strlen(body));
+                    "utf-8", "", "", "", "", body, strlen(body));
   }
 
   for (i = 0; i < large_count; i++) {
@@ -460,7 +461,7 @@ int cache_selftests(httrackp *opt, const char *dir) {
 
     sprintf(fil, "/big/%d.bin", i);
     failures += check_entry(opt, &cache, "example.com", fil, 200, "OK",
-                            "application/octet-stream", "", "", "", "",
+                            "application/octet-stream", "", "", "", "", "",
                             large_body[i], large_size[i]);
   }
 
@@ -470,7 +471,7 @@ int cache_selftests(httrackp *opt, const char *dir) {
   selftest_open_for_write(&cache, opt);
   store_entry(opt, &cache, "example.com", "/", "example.com/index.html", 200,
               "OK", "text/html", "iso-8859-1", "Wed, 03 Jan 2024 09:30:00 GMT",
-              "etag-updated", "", body_updated, strlen(body_updated));
+              "etag-updated", "", "", body_updated, strlen(body_updated));
   selftest_close(&cache);
 
   /* pass 4: re-read and confirm the updated value, not the old one */
@@ -478,7 +479,7 @@ int cache_selftests(httrackp *opt, const char *dir) {
   failures +=
       check_entry(opt, &cache, "example.com", "/", 200, "OK", "text/html",
                   "iso-8859-1", "Wed, 03 Jan 2024 09:30:00 GMT", "etag-updated",
-                  "", body_updated, strlen(body_updated));
+                  "", "", body_updated, strlen(body_updated));
   selftest_close(&cache);
 
   /* pass 5: the disk-fallback read path (X-In-Cache: 0, body on disk) */
@@ -490,3 +491,97 @@ int cache_selftests(httrackp *opt, const char *dir) {
 
   return failures;
 }
+
+/* Golden fixture: a small frozen cache read back to guard the read path and ZIP
+   format. The table is the contract; tests/fixtures/cache-golden/.../new.zip is
+   a witness written once via `httrack -#B <dir> regen`. Bodies stay in the ZIP
+   (all_in_cache=1), so a read needs only new.zip -- fully portable. */
+
+/* embedded NUL + high bytes: the binary-safe read path */
+static const char golden_binary[] = {
+    'P',  'N',  'G', '\0', '\r', '\n',        (char) 0xFF, (char) 0x80,
+    '\0', '\0', 'e', 'n',  'd',  (char) 0xCA, (char) 0xFE, '\n'};
+
+typedef struct {
+  const char *adr, *fil, *save, *msg, *contenttype, *charset, *lastmodified,
+      *etag, *location, *cdispo, *body;
+  size_t body_len;
+  int statuscode;
+} golden_entry;
+
+/* string-literal body + length (drops the terminator); the binary array passes
+   its length explicitly, every byte counts */
+#define GBODY(s) (s), (sizeof(s) - 1)
+
+static const golden_entry golden_entries[] = {
+    /* normal HTML page */
+    {"example.com", "/", "example.com/index.html", "OK", "text/html", "utf-8",
+     "Mon, 01 Jan 2024 00:00:00 GMT", "etag-normal", "", "",
+     GBODY("<html><body>hello</body></html>"), 200},
+    /* redirect: empty body and optionals, a Location */
+    {"example.com", "/moved", "example.com/moved.html", "Moved Permanently",
+     "text/html", "", "", "", "https://example.com/new-home", "", NULL, 0, 301},
+    /* non-HTML content */
+    {"example.com", "/api", "example.com/api.json", "OK", "application/json",
+     "utf-8", "Tue, 02 Jan 2024 12:00:00 GMT", "etag-api", "", "",
+     GBODY("{\"k\":\"v\"}"), 200},
+    /* binary body with a Content-Disposition */
+    {"example.com", "/logo", "example.com/logo.png", "OK", "image/png", "", "",
+     "etag-bin", "", "attachment; filename=\"logo.png\"", golden_binary,
+     sizeof(golden_binary), 200},
+    /* error status with a body and a Location */
+    {"example.com", "/gone", "example.com/gone.html", "Not Found", "text/html",
+     "utf-8", "", "etag-404", "https://example.com/where-it-went", "",
+     GBODY("<html><body>404 Not Found</body></html>"), 404},
+};
+
+#define GOLDEN_COUNT (sizeof(golden_entries) / sizeof(golden_entries[0]))
+
+static void golden_setup(httrackp *opt, const char *dir) {
+  char base[HTS_URLMAXSIZE];
+
+  strcpybuff(base, dir);
+  if (base[0] != '\0' && base[strlen(base) - 1] != '/') {
+    strcatbuff(base, "/");
+  }
+  StringCopy(opt->path_log, base);
+  StringCopy(opt->path_html, base);
+  StringCopy(opt->path_html_utf8, base);
+  opt->cache = 1;
+}
+
+int cache_golden_selftest(httrackp *opt, const char *dir, int regen) {
+  int failures = 0;
+  size_t k;
+  cache_back cache;
+
+  selftest_tag = "cache-golden";
+  golden_setup(opt, dir);
+
+  /* regen rewrites the fixture from the table; the test never passes it, so the
+     read pass verifies bytes a previous build froze */
+  if (regen) {
+    selftest_open_for_write(&cache, opt);
+    for (k = 0; k < GOLDEN_COUNT; k++) {
+      const golden_entry *e = &golden_entries[k];
+
+      store_entry(opt, &cache, e->adr, e->fil, e->save, e->statuscode, e->msg,
+                  e->contenttype, e->charset, e->lastmodified, e->etag,
+                  e->location, e->cdispo, e->body, e->body_len);
+    }
+    selftest_close(&cache);
+  }
+
+  selftest_open_for_read(&cache, opt);
+  for (k = 0; k < GOLDEN_COUNT; k++) {
+    const golden_entry *e = &golden_entries[k];
+
+    failures +=
+        check_entry(opt, &cache, e->adr, e->fil, e->statuscode, e->msg,
+                    e->contenttype, e->charset, e->lastmodified, e->etag,
+                    e->location, e->cdispo, e->body, e->body_len);
+  }
+  selftest_close(&cache);
+
+  return failures;
+}

src/htscache_selftest.h

@@ -44,6 +44,14 @@ typedef struct httrackp httrackp;
    Returns the number of failed checks (0 == success). */
 int cache_selftests(httrackp *opt, const char *dir);
 
+/* Read a committed (frozen) cache fixture under <dir>/hts-cache/new.zip and
+   assert a fixed set of entries decodes field- and byte-exact. Unlike
+   cache_selftests (write-then-read with the same build, a round-trip), this
+   reads bytes an earlier build froze, so it catches read-path / format drift.
+   regen!=0 first rewrites the fixture from the same table (to regenerate the
+   committed file, never by the test). Returns the failed-check count. */
+int cache_golden_selftest(httrackp *opt, const char *dir, int regen);
+
 #endif
 
 #endif

src/htscore.h

@@ -30,7 +30,9 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
-// Fichier librairie .h
+/* Core engine declarations. Not an installed header, but part of the de-facto
+   API surface: external consumers (e.g. httrack-android) read these structs and
+   constants and call functions declared here. */
 #ifndef HTS_CORE_DEFH
 #define HTS_CORE_DEFH
 
@@ -38,7 +40,7 @@ Please visit our Website: http://www.httrack.com
 
 /* specific definitions */
 #include "htsbase.h"
-// Includes & définitions
+/* Includes and definitions */
 #include <sys/types.h>
 #include <sys/stat.h>
 #ifdef _WIN32
@@ -83,45 +85,45 @@ typedef struct filecreate_params filecreate_params;
 // options
 #include "htsopt.h"
 
-// INCLUDES .H PARTIES DE CODE HTTRACK
+// HTTrack engine sub-headers
 
-// routine main
+// main entry point
 #include "htscoremain.h"
 
 // core routines
 #include "htscore.h"
 
-// divers outils pour httrack.c
+// misc tools for httrack.c
 #include "htstools.h"
 
-// aide pour la version en ligne de commande
+// command-line help
 #include "htshelp.h"
 
-// génération du nom de fichier à sauver
+// build the on-disk save filename
 #include "htsname.h"
 
-// gestion ftp
+// FTP support
 #include "htsftp.h"
 
-// gestion interception d'URL
+// URL interception
 #include "htscatchurl.h"
 
-// gestion robots.txt
+// robots.txt handling
 #include "htsrobots.h"
 
-// routines d'acceptation de liens
+// link-acceptance rules
 #include "htswizard.h"
 
-// routines de regexp
+// regexp/filter routines
 #include "htsfilters.h"
 
-// gestion backing
+// download backing (the back[] slot ring)
 #include "htsback.h"
 
-// gestion cache
+// cache handling
 #include "htscache.h"
 
-// gestion hashage
+// hashing
 #include "htshash.h"
 #include "coucal.h"
 
@@ -129,65 +131,74 @@ typedef struct filecreate_params filecreate_params;
 
 #include "hts-indextmpl.h"
 
-// adr, fil
+/** A remote URL split into host and path, each a fixed inline buffer
+    (HTS_URLMAXSIZE*2 bytes, NUL-terminated). */
 #ifndef HTS_DEF_FWSTRUCT_lien_adrfil
 #define HTS_DEF_FWSTRUCT_lien_adrfil
 typedef struct lien_adrfil lien_adrfil;
 #endif
 struct lien_adrfil {
-  char adr[HTS_URLMAXSIZE * 2];      // adresse
-  char fil[HTS_URLMAXSIZE * 2];      // nom du fichier distant
+  char adr[HTS_URLMAXSIZE * 2]; /**< host (address) */
+  char fil[HTS_URLMAXSIZE * 2]; /**< remote file path */
 };
 
-// adr, fil, save
+/** A remote URL plus the local on-disk path it is saved to. */
 #ifndef HTS_DEF_FWSTRUCT_lien_adrfilsave
 #define HTS_DEF_FWSTRUCT_lien_adrfilsave
 typedef struct lien_adrfilsave lien_adrfilsave;
 #endif
 struct lien_adrfilsave {
   lien_adrfil af;
-  char save[HTS_URLMAXSIZE * 2];     // nom à sauver sur disque (avec chemin éventuel)
+  char save[HTS_URLMAXSIZE * 2]; /**< local save path (with directory) */
 };
 
+/** The download-slot ring: the set of concurrent transfers in flight.
+    Allocated/owned by the engine; consumers (status callbacks, the loop)
+    read it but do not resize or free it. */
 #ifndef HTS_DEF_FWSTRUCT_struct_back
 #define HTS_DEF_FWSTRUCT_struct_back
 typedef struct struct_back struct_back;
 #endif
 struct struct_back {
-  lien_back *lnk;
-  int count;
-  coucal ready;
-  LLint ready_size_bytes;
+  lien_back *lnk;         /**< slot array, valid indices [0..count-1]
+                               (count+1 entries allocated); a slot is
+                               active iff lnk[i].status != STATUS_FREE.
+                               See struct lien_back in htsopt.h and the
+                               STATUS_* codes in htsbasenet.h. */
+  int count;              /**< number of usable slots (back_max) */
+  coucal ready;           /**< index of slots whose transfer completed */
+  LLint ready_size_bytes; /**< total bytes buffered in completed slots */
 };
 
 typedef struct cache_back_zip_entry cache_back_zip_entry;
 
-// cache
+/** Open handle to the mirror cache (the read-from-old / write-to-new state
+    used to resume and to avoid re-fetching unchanged files). Engine-owned. */
 #ifndef HTS_DEF_FWSTRUCT_cache_back
 #define HTS_DEF_FWSTRUCT_cache_back
 typedef struct cache_back cache_back;
 #endif
 struct cache_back {
-  int version;                  // 0 ou 1
+  int version; /**< cache-file format version being read */
   /* */
   int type;
-  int ro;
-  FILE *dat, *ndx, *olddat;
-  char *use;                    // liste des adr+fil
-  FILE *lst;                    // liste des fichiers pour la "purge"
-  FILE *txt;                    // liste des fichiers (info)
+  int ro;                   /**< read-only: no new cache is written */
+  FILE *dat, *ndx, *olddat; /**< new data, new index, old data files */
+  char *use;                /**< in-memory list of cached adr+fil keys */
+  FILE *lst;                /**< file list, used for purge */
+  FILE *txt;                /**< human-readable file list (info) */
   char lastmodified[256];
   // HASH
   coucal hashtable;
   // HASH for tests (naming subsystem)
   coucal cached_tests;
-  // fichiers log optionnels
+  /* optional log files */
   FILE *log;
   FILE *errlog;
-  // variables
-  int ptr_ant;                  // pointeur pour anticiper
-  int ptr_last;                 // pointeur pour anticiper
-  //
+  /* read-ahead cursors into the old cache */
+  int ptr_ant;
+  int ptr_last;
+  /* ZIP-backed cache backend (newer format) */
   void *zipInput;
   void *zipOutput;
   cache_back_zip_entry *zipEntries;
@@ -199,16 +210,19 @@ struct cache_back {
 #define HTS_DEF_FWSTRUCT_hash_struct
 typedef struct hash_struct hash_struct;
 #endif
+/** Lookup indexes over the link heap: map save-name / URL back to a link, so a
+    URL seen twice resolves to one entry. The coucal tables index into liens;
+    they do not own the links. */
 struct hash_struct {
-  /* Links big array reference */
+  /* points at the engine's link array (opt->liens); not owned */
   const lien_url *const*const*liens;
-  /* Savename (case insensitive ; lowercased) */
+  /* save-name -> link index (case-insensitive: keys lowercased) */
   coucal sav;
-  /* Address and path */
+  /* address+path -> link index */
   coucal adrfil;
-  /* Former address and path */
+  /* former address+path -> link index (renamed/moved entries) */
   coucal former_adrfil;
-  /** Buffers **/
+  /* scratch buffers reused across lookups (not reentrant) */
   int normalized;
   char normfil[HTS_URLMAXSIZE * 2];
   char normfil2[HTS_URLMAXSIZE * 2];
@@ -219,113 +233,171 @@ struct hash_struct {
 #define HTS_DEF_FWSTRUCT_filecreate_params
 typedef struct filecreate_params filecreate_params;
 #endif
+/** Parameters threaded through file-creation callbacks (filenote). */
 struct filecreate_params {
-  FILE *lst;
+  FILE *lst; /**< open file list to append created paths to */
   char path[HTS_URLMAXSIZE * 2];
 };
 
-/* Access macros. */
+/* Convenience accessors over the link heap; assume `opt` (and where used,
+   `ptr`/`parent_relative`) are in scope. heap(N) is the Nth link;
+   heap_top_index() is the last recorded link's index. */
 #define heap(N)            (opt->liens[N])
+
 #define heap_top_index()   (opt->lien_tot - 1)
+
 #define heap_top()         (heap(heap_top_index()))
+
 #define urladr()           (heap(ptr)->adr)
+
 #define urlfil()           (heap(ptr)->fil)
+
 #define savename()         (heap(ptr)->sav)
+
 #define parenturladr()     (heap(heap(ptr)->precedent)->adr)
+
 #define parenturlfil()     (heap(heap(ptr)->precedent)->fil)
+
 #define parentsavename()   (heap(heap(ptr)->precedent)->sav)
+
 #define relativeurladr()   ((!parent_relative)?urladr():parenturladr())
+
 #define relativeurlfil()   ((!parent_relative)?urlfil():parenturlfil())
+
 #define relativesavename() ((!parent_relative)?savename():parentsavename())
 
-/* Library internal definictions */
+/* Library-internal helpers (engine-only, HTS_INTERNAL_BYTECODE). */
 #ifdef HTS_INTERNAL_BYTECODE
 
+/* True if a new cache is being written (plain or zip backend). */
 HTS_STATIC int cache_writable(cache_back * cache) {
   return (cache != NULL && (cache->dat != NULL || cache->zipOutput != NULL));
 }
 
+/* True if an old cache is available to read (plain or zip backend). */
 HTS_STATIC int cache_readable(cache_back * cache) {
   return (cache != NULL && (cache->olddat != NULL || cache->zipInput != NULL));
 }
 
 #endif
 
-// Fonctions
+// Functions
 
-// INCLUDES .H PARTIES DE CODE HTTRACK
-
-/* Library internal definictions */
+/* Library-internal only (engine TUs). */
 #ifdef HTS_INTERNAL_BYTECODE
 
 char *hts_cancel_file_pop(httrackp * opt);
 
 #endif
 
-// add a link on the heap
+/* Record a link on the heap. All strings are copied (caller keeps ownership).
+   Returns 1 on success, 0 if the link limit (opt->maxlink) is reached. */
 int hts_record_link(httrackp * opt,
                     const char *address, const char *file, const char *save,
                     const char *ref_address, const char *ref_file,
                     const char *codebase);
 
-// index of the latest added link
+/* Index of the most recently recorded link. */
 size_t hts_record_link_latest(httrackp *opt);
 
-// invalidate an entry
+/* Mark link at index lpos as not to be processed (sets pass2 = -1). */
 void hts_invalidate_link(httrackp * opt, int lpos);
 
-// wipe all records
+/* Reset / free the engine's link heap. */
 void hts_record_init(httrackp *opt);
+
 void hts_record_free(httrackp *opt);
 
-//int httpmirror(char* url,int level,httrackp opt);
+/* Run the mirror for the given start URL(s) under opt. Top-level engine entry.
+ */
 int httpmirror(char *url1, httrackp * opt);
+
+/* Write len bytes of adr to local path s. url_adr/url_fil (may be NULL) name
+   the source URL for logging/notification. */
 int filesave(httrackp * opt, const char *adr, int len, const char *s,
              const char *url_adr /* = NULL */ ,
              const char *url_fil /* = NULL */ );
+
 char *hts_cancel_file_pop(httrackp * opt);
+
 int check_fatal_io_errno(void);
+
 int engine_stats(void);
+
 void host_ban(httrackp * opt, int ptr, struct_back * sback, const char *host);
+
+/* Open local file s for writing (filecreate, truncate) or appending
+   (fileappend), creating parent directories as needed. Return an open FILE*
+   the caller must fclose(), or NULL on failure. */
 FILE *filecreate(filenote_strc * strct, const char *s);
+
 FILE *fileappend(filenote_strc * strct, const char *s);
+
+/* Create an empty file, return 1 on success, 0 on failure. */
 int filecreateempty(filenote_strc * strct, const char *filename);
+
 int filenote(filenote_strc * strct, const char *s, filecreate_params * params);
+
 void file_notify(httrackp * opt, const char *adr, const char *fil,
                  const char *save, int create, int modify, int wasupdated);
+
 void usercommand(httrackp * opt, int exe, const char *cmd, const char *file,
                  const char *adr, const char *fil);
+
 void usercommand_exe(const char *cmd, const char *file);
+
 int filters_init(char ***ptrfilters, int maxfilter, int filterinc);
 
 int fspc(httrackp * opt, FILE * fp, const char *type);
+
 char *next_token(char *p, int flag);
 
-//
+/* Read a whole file into a freshly malloc'd, NUL-terminated buffer; the caller
+   owns it and must release it with freet(). Return NULL on missing/unreadable
+   file (readfile_or substitutes defaultdata instead). The byte content is NOT
+   transcoded except readfile_utf8, which expects a UTF-8 path. readfile2
+   reports the byte size (excluding the NUL) via *size when non-NULL. */
 char *readfile(const char *fil);
+
 char *readfile2(const char *fil, LLint * size);
+
 char *readfile_utf8(const char *fil);
+
 char *readfile_or(const char *fil, const char *defaultdata);
 
 #if 0
 void check_rate(TStamp stat_timestart, int maxrate);
 #endif
 
-// liens
-int liens_record(char *adr, char *fil, char *save, char *former_adr,
-                 char *former_fil, char *codebase);
+/* Backing (download-slot) scheduler. Operate on the back[] ring (struct_back).
+   Not thread-safe; call from the single crawl loop. */
 
-// backing, routines externes
+/* How many new sockets may be opened now, honoring maxsoc and the maxconn rate
+   limit (>=0). _strict ignores reserved-slot headroom; the plain form leaves
+   room for naming tests and stops at 0 when the stack is nearly full. */
 int back_pluggable_sockets(struct_back * sback, httrackp * opt);
+
 int back_pluggable_sockets_strict(struct_back * sback, httrackp * opt);
+
+/* Schedule more links from the heap into free slots. Returns the number queued,
+   or <=0 if none could be added (no free slot / paused / stopped). */
 int back_fill(struct_back * sback, httrackp * opt, cache_back * cache,
               int ptr, int numero_passe);
-int backlinks_done(const struct_back * sback, lien_url ** liens, 
-                   int lien_tot, int ptr);
+
+/* Count of links already finished (in background or served from cache). */
+int backlinks_done(const struct_back *sback, lien_url **liens, int lien_tot,
+                   int ptr);
+
+/* Like back_fill, but a no-op (returns -1) when in-memory buffered data already
+   exceeds opt->maxcache. */
 int back_fillmax(struct_back * sback, httrackp * opt, cache_back * cache,
                  int ptr, int numero_passe);
 
+/* Interactive prompt: continue an interrupted mirror? Returns nonzero to go on.
+ */
 int ask_continue(httrackp * opt);
+
+/* Number of decimal digits in n. */
 int nombre_digit(int n);
 
 // Java
@@ -336,17 +408,23 @@ int hts_add_file(char *file, int file_position);
 // Polling
 #if HTS_POLL
 int check_flot(T_SOC s);
+
 int check_stdin(void);
+
 int read_stdin(char *s, int max);
 #endif
+/* Socket readiness probes: nonzero if the socket has an error / has data. */
 int check_sockerror(T_SOC s);
+
 int check_sockdata(T_SOC s);
 
-/* external modules */
+/* external modules: register a link discovered by a parser plugin. */
 int htsAddLink(htsmoduleStruct * str, char *link);
 
-// Void
+/* No-op function (used as a do-nothing callback / to defeat optimizers). */
 void voidf(void);
+
+/* HTML marker comment marking where the top index is spliced. */
 #define HTS_TOPINDEX "TOP_INDEX_HTTRACK"
 
 #endif

src/htscoremain.c

@@ -69,31 +69,6 @@ Please visit our Website: http://www.httrack.com
 /* Resolver */
 extern int IPV6_resolver;
 
-/* Remaining room in the argv block; 0 once it is exhausted (alias expansion or
-   doit.log insertion can outrun the +32768 slack), so the copy aborts cleanly
-   instead of the subtraction wrapping to a huge unbounded size. */
-#define cmdl_room(bufsize, ptr)                                                \
-  ((ptr) < (size_t) (bufsize) ? (size_t) (bufsize) - (ptr) : 0)
-
-// Add a command in the argc/argv (buff has total capacity bufsize)
-#define cmdl_add(token, argc, argv, buff, bufsize, ptr)                        \
-  argv[argc] = (buff + ptr);                                                   \
-  strlcpybuff(argv[argc], token, cmdl_room(bufsize, ptr));                     \
-  ptr += (int) (strlen(argv[argc]) + 2);                                       \
-  argc++
-
-// Insert a command in the argc/argv (buff has total capacity bufsize)
-#define cmdl_ins(token, argc, argv, buff, bufsize, ptr)                        \
-  {                                                                            \
-    int i;                                                                     \
-    for (i = argc; i > 0; i--)                                                 \
-      argv[i] = argv[i - 1];                                                   \
-  }                                                                            \
-  argv[0] = (buff + ptr);                                                      \
-  strlcpybuff(argv[0], token, cmdl_room(bufsize, ptr));                        \
-  ptr += (int) (strlen(argv[0]) + 2);                                          \
-  argc++
-
 #define htsmain_free() do { \
   if (url != NULL) { \
     free(url); \
@@ -2465,6 +2440,22 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
                   return 1;
                 }
                 break;
+              case 'B': // golden cache fixture read: httrack -#B <dir> [regen]
+                if (na + 1 < argc) {
+                  const int regen =
+                      (na + 2 < argc && strcmp(argv[na + 2], "regen") == 0);
+                  const int err =
+                      cache_golden_selftest(opt, argv[na + 1], regen);
+
+                  printf("cache-golden: %s\n", err ? "FAIL" : "OK");
+                  htsmain_free();
+                  return err;
+                } else {
+                  fprintf(stderr, "Option #B requires a directory argument\n");
+                  htsmain_free();
+                  return 1;
+                }
+                break;
               case 'C':        // list cache files : httrack -#C '*spid*.gif' will attempt to find the matching file
                 {
                   int hasFilter = 0;

src/htsdefines.h

@@ -30,11 +30,16 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
-// Fichier librairie .h
+/** @file htsdefines.h
+ *  Public callback prototypes and the wrapper/plug-in interface: the function
+ *  pointer types a parser or wrapper module implements, and the callback table
+ *  the engine dispatches through. */
 #ifndef HTS_DEFINES_DEFH
 #define HTS_DEFINES_DEFH
 
-/* Forward definitions */
+/* Forward declarations of engine structs, so this header is usable without
+   pulling in their full definitions. Each is guarded so multiple public
+   headers can repeat the typedef without clashing. */
 #ifndef HTS_DEF_FWSTRUCT_httrackp
 #define HTS_DEF_FWSTRUCT_httrackp
 typedef struct httrackp httrackp;
@@ -64,7 +69,8 @@ typedef struct t_hts_callbackarg t_hts_callbackarg;
 typedef struct t_hts_callbackarg t_hts_callbackarg;
 #endif
 
-/* External callbacks */
+/* Marks a symbol an external wrapper module exports back to the engine
+   (dllexport on Windows, nothing elsewhere). */
 #ifndef EXTERNAL_FUNCTION
 #ifdef _WIN32
 #define EXTERNAL_FUNCTION __declspec(dllexport)
@@ -73,78 +79,141 @@ typedef struct t_hts_callbackarg t_hts_callbackarg;
 #endif
 #endif
 
-/* --wrapper plug function prototype */
-
+/* Entry points of a --wrapper plug-in: hts_plug(opt, argv) is called once to
+   install the wrapper (argv is the wrapper's argument string), hts_unplug(opt)
+   once to tear it down. Both return non-zero on success. */
 typedef int (*t_hts_plug) (httrackp * opt, const char *argv);
+
 typedef int (*t_hts_unplug) (httrackp * opt);
 
-/* htsopt function callbacks definitions */
+/* Engine callback prototypes. Each is one hook the engine fires at a defined
+   point of a mirror; a wrapper installs the ones it cares about in the
+   callback table below. carg carries the user-defined argument chain; int
+   returns are 1 to continue/accept, 0 to abort/refuse unless noted. */
 
+/* Called once when the wrapper is installed; allocate per-run state here. */
 typedef void (*t_hts_htmlcheck_init) (t_hts_callbackarg * carg);
+
+/* Called once when the wrapper is removed; release per-run state here. */
 typedef void (*t_hts_htmlcheck_uninit) (t_hts_callbackarg * carg);
+
+/* Fired at the start of a mirror, after options are parsed. */
 typedef int (*t_hts_htmlcheck_start) (t_hts_callbackarg * carg, httrackp * opt);
+
+/* Fired at the end of a mirror. */
 typedef int (*t_hts_htmlcheck_end) (t_hts_callbackarg * carg, httrackp * opt);
+
+/* Fired while options are being changed, to validate or adjust them. */
 typedef int (*t_hts_htmlcheck_chopt) (t_hts_callbackarg * carg, httrackp * opt);
+
+/* Rewrite hook over an in-memory page: the html and len arguments point at the
+   buffer and its length (the callback may reallocate and resize it),
+   url_adresse and url_fichier name it. */
 typedef int (*t_hts_htmlcheck_process) (t_hts_callbackarg * carg,
                                         httrackp * opt, char **html, int *len,
                                         const char *url_adresse,
                                         const char *url_fichier);
+
+/* Same shape as process, run before HTML parsing. */
 typedef t_hts_htmlcheck_process t_hts_htmlcheck_preprocess;
+
+/* Same shape as process, run after HTML parsing. */
 typedef t_hts_htmlcheck_process t_hts_htmlcheck_postprocess;
+
+/* Inspect a page (read-only html/len) without rewriting it. */
 typedef int (*t_hts_htmlcheck_check_html) (t_hts_callbackarg * carg,
                                            httrackp * opt, char *html, int len,
                                            const char *url_adresse,
                                            const char *url_fichier);
+
+/* Answer an engine query identified by 'question'; returns the answer string
+   (owned by the callback, must stay valid until the next call). */
 typedef const char *(*t_hts_htmlcheck_query) (t_hts_callbackarg * carg,
                                               httrackp * opt,
                                               const char *question);
+
+/* Second query channel, same contract as query. */
 typedef const char *(*t_hts_htmlcheck_query2) (t_hts_callbackarg * carg,
                                                httrackp * opt,
                                                const char *question);
+
+/* Third query channel, same contract as query. */
 typedef const char *(*t_hts_htmlcheck_query3) (t_hts_callbackarg * carg,
                                                httrackp * opt,
                                                const char *question);
+
+/* Per-tick progress hook: 'back' is the transfer slot array of 'back_max'
+   entries, back_index the active one; lien_tot/lien_ntot and stats report
+   queue size and running totals, stat_time the elapsed time. */
 typedef int (*t_hts_htmlcheck_loop) (t_hts_callbackarg * carg, httrackp * opt,
                                      lien_back * back, int back_max,
                                      int back_index, int lien_tot,
                                      int lien_ntot, int stat_time,
                                      hts_stat_struct * stats);
+
+/* Veto a link (adr host, fil path) after its transfer; status is the result.
+   Return 0 to drop the link. */
 typedef int (*t_hts_htmlcheck_check_link) (t_hts_callbackarg * carg,
                                            httrackp * opt, const char *adr,
                                            const char *fil, int status);
+
+/* Veto a link by its MIME type before download; return 0 to skip it. */
 typedef int (*t_hts_htmlcheck_check_mime) (t_hts_callbackarg * carg,
                                            httrackp * opt, const char *adr,
                                            const char *fil, const char *mime,
                                            int status);
+
+/* Fired when the mirror pauses, waiting on 'lockfile' to be removed. */
 typedef void (*t_hts_htmlcheck_pause) (t_hts_callbackarg * carg, httrackp * opt,
                                        const char *lockfile);
+
+/* Fired after a file is written to disk; 'file' is the local path. */
 typedef void (*t_hts_htmlcheck_filesave) (t_hts_callbackarg * carg,
                                           httrackp * opt, const char *file);
+
+/* Richer file-saved notification: source host/filename, local path, and flags
+   telling whether the file is new, modified, or left unchanged. */
 typedef void (*t_hts_htmlcheck_filesave2) (t_hts_callbackarg * carg,
                                            httrackp * opt, const char *hostname,
                                            const char *filename,
                                            const char *localfile, int is_new,
                                            int is_modified, int not_updated);
+
+/* Fired for each link parsed out of a page; 'link' may be edited in place. */
 typedef int (*t_hts_htmlcheck_linkdetected) (t_hts_callbackarg * carg,
                                              httrackp * opt, char *link);
+
+/* As linkdetected, plus tag_start, the markup the link was found in. */
 typedef int (*t_hts_htmlcheck_linkdetected2) (t_hts_callbackarg * carg,
                                               httrackp * opt, char *link,
                                               const char *tag_start);
+
+/* Fired on each transfer-status change of slot 'back'. */
 typedef int (*t_hts_htmlcheck_xfrstatus) (t_hts_callbackarg * carg,
                                           httrackp * opt, lien_back * back);
+
+/* Choose the local save path for a URL; write it into 'save'. adr/fil name the
+   target, referer_adr/referer_fil the page that linked it. */
 typedef int (*t_hts_htmlcheck_savename) (t_hts_callbackarg * carg,
                                          httrackp * opt,
                                          const char *adr_complete,
                                          const char *fil_complete,
                                          const char *referer_adr,
                                          const char *referer_fil, char *save);
+
+/* Extended save-name hook, same signature as savename. */
 typedef t_hts_htmlcheck_savename t_hts_htmlcheck_extsavename;
+
+/* Inspect or edit the outgoing request headers in 'buff' before they are sent.
+ */
 typedef int (*t_hts_htmlcheck_sendhead) (t_hts_callbackarg * carg,
                                          httrackp * opt, char *buff,
                                          const char *adr, const char *fil,
                                          const char *referer_adr,
                                          const char *referer_fil,
                                          htsblk * outgoing);
+
+/* Inspect the incoming response headers in 'buff' after they are received. */
 typedef int (*t_hts_htmlcheck_receivehead) (t_hts_callbackarg * carg,
                                             httrackp * opt, char *buff,
                                             const char *adr, const char *fil,
@@ -152,9 +221,11 @@ typedef int (*t_hts_htmlcheck_receivehead) (t_hts_callbackarg * carg,
                                             const char *referer_fil,
                                             htsblk * incoming);
 
-/* External additional parsing module(s) */
+/* External parser module hooks: detect claims a document type (return 1 to
+   take it), parse then extracts its links. 'str' carries the document. */
 typedef int (*t_hts_htmlcheck_detect) (t_hts_callbackarg * carg, httrackp * opt,
                                        htsmoduleStruct * str);
+
 typedef int (*t_hts_htmlcheck_parse) (t_hts_callbackarg * carg, httrackp * opt,
                                       htsmoduleStruct * str);
 
@@ -164,20 +235,24 @@ typedef int (*t_hts_htmlcheck_parse) (t_hts_callbackarg * carg, httrackp * opt,
 typedef struct t_hts_htmlcheck_callbacks t_hts_htmlcheck_callbacks;
 #endif
 
-/* Callabck array */
+/* Declares one named callback slot: its function pointer (typed
+   t_hts_htmlcheck_<NAME>) paired with the carg passed to it. */
 #define DEFCALLBACK(NAME)         \
   struct NAME {                   \
     t_hts_htmlcheck_ ##NAME fun;  \
     t_hts_callbackarg *carg;      \
   } NAME
 
-/* Callback items */
+/* Generic, type-erased callback slot used where the hook type is opaque. */
 typedef void *t_hts_htmlcheck_t_hts_htmlcheck_callbacks_item;
+
 typedef DEFCALLBACK(t_hts_htmlcheck_callbacks_item);
 
-/* Linked list, which should be used for the 'arg' user-defined argument */
+/* Per-callback argument node. Wrappers chain these so a new hook can wrap an
+   existing one: userdef is the wrapper's own data, prev points back to the
+   function and carg it displaced (call it to keep the previous behavior). */
 struct t_hts_callbackarg {
-  /* User-defined agument for the called function */
+  /* User-defined argument for the called function */
   void *userdef;
 
   /* Previous function, if any (fun != NULL) */
@@ -187,7 +262,9 @@ struct t_hts_callbackarg {
   } prev;
 };
 
-/* Callback structure */
+/* The full callback table, one slot per hook; installed in httrackp options
+   and dispatched by the engine. The trailing comments mark the API version a
+   slot first appeared in. */
 struct t_hts_htmlcheck_callbacks {
   /* v3.41 */
   DEFCALLBACK(init);
@@ -219,9 +296,11 @@ struct t_hts_htmlcheck_callbacks {
   DEFCALLBACK(extsavename);
 };
 
-/* Library internal definitions */
+/* Library-internal helpers, compiled only inside the engine. */
 #ifdef HTS_INTERNAL_BYTECODE
 
+/* Maps a callback slot's name to its byte offset in the callback table, so a
+   slot can be installed by name. */
 #ifndef HTS_DEF_FWSTRUCT_t_hts_callback_ref
 #define HTS_DEF_FWSTRUCT_t_hts_callback_ref
 typedef struct t_hts_callback_ref t_hts_callback_ref;
@@ -235,18 +314,26 @@ struct t_hts_callback_ref {
 extern "C" {
 #endif
 
+/* Default (no-op) callback table the engine starts from. */
 extern const t_hts_htmlcheck_callbacks default_callbacks;
 
 #ifdef __cplusplus
 }
 #endif
 
+/* Internal helpers for building an HTTP request/response into the engine's
+   scratch buffer (opt->state.HTbuff): START resets it, PRINT appends; the
+   PANIC variant records a fatal error message. */
 #define HT_PRINT(A) strcatbuff(opt->state.HTbuff,A);
+
 #define HT_REQUEST_START opt->state.HTbuff[0]='\0';
+
 #define HT_REQUEST_END
 #define HTT_REQUEST_START opt->state.HTbuff[0]='\0';
+
 #define HTT_REQUEST_END
 #define HTS_REQUEST_START opt->state.HTbuff[0]='\0';
+
 #define HTS_REQUEST_END
 #define HTS_PANIC_PRINTF(S) strcpybuff(opt->state._hts_errmsg,S);
 

src/htsglobal.h

@@ -30,12 +30,19 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
-// Fichier réunissant l'ensemble des defines
+/** @file htsglobal.h
+ *  Foundational portability layer included by every other public header:
+ *  version strings, platform/feature switches, the HTSEXT_API export marker,
+ *  the integer/time/socket typedefs (LLint, TStamp, INTsys, T_SOC), printf
+ *  format helpers, and the file-access mode constants. */
 
 #ifndef HTTRACK_GLOBAL_DEFH
 #define HTTRACK_GLOBAL_DEFH
 
-// Version (also check external version information)
+/* Package version strings (the library ABI version is VERSION_INFO in
+   configure.ac, decoupled from these). VERSION is the display form, VERSIONID
+   the dotted numeric form, AFF_VERSION the short form shown in footers,
+   LIB_VERSION the data/cache format generation. */
 #define HTTRACK_VERSION      "3.49-8"
 #define HTTRACK_VERSIONID    "3.49.8"
 #define HTTRACK_AFF_VERSION  "3.x"
@@ -46,7 +53,7 @@ Please visit our Website: http://www.httrack.com
 #include <stdlib.h>
 #endif
 
-// Définition plate-forme
+// Platform detection (sizes, feature macros)
 #include "htsconfig.h"
 
 // WIN32 types
@@ -57,11 +64,17 @@ Please visit our Website: http://www.httrack.com
 #endif
 #endif
 
-/* GCC extension */
+/* Compiler-attribute helpers, no-ops where unsupported.
+   HTS_UNUSED: suppress unused-symbol warnings. HTS_STATIC: an unused-safe
+   static. HTS_PRINTF_FUN(fmt, arg): mark a printf-like function so the
+   compiler type-checks the format string at argument index fmt against the
+   varargs starting at arg. */
 #ifndef HTS_UNUSED
 #ifdef __GNUC__
 #define HTS_UNUSED __attribute__ ((unused))
+
 #define HTS_STATIC static __attribute__ ((unused))
+
 #define HTS_PRINTF_FUN(fmt, arg) __attribute__ ((format (printf, fmt, arg)))
 #else
 #define HTS_UNUSED
@@ -86,6 +99,7 @@ Please visit our Website: http://www.httrack.com
 #endif
 #ifndef S_ISREG
 #define S_ISREG(m) ((m) & _S_IFREG)
+
 #define S_ISDIR(m) ((m) & _S_IFDIR)
 #endif
 
@@ -132,7 +146,7 @@ Please visit our Website: http://www.httrack.com
 #define BIGSTK
 #endif
 
-// compatibilité DOS
+// DOS-style 8.3 filenames? 1 on Windows, 0 elsewhere
 #ifdef _WIN32
 #define HTS_DOSNAME 1
 #else
@@ -168,7 +182,10 @@ Please visit our Website: http://www.httrack.com
 #define __cdecl
 #endif
 
-/* rc file */
+/* Install paths and config-file names. HTTRACKRC is the per-user rc filename,
+   HTTRACKCNF the system-wide config, HTTRACKDIR the shared data directory; the
+   ETC/BIN/LIB/PREFIX paths are the defaults these derive from when not set by
+   the build. */
 #ifdef _WIN32
 #define HTS_HTTRACKRC "httrackrc"
 #else
@@ -197,9 +214,11 @@ Please visit our Website: http://www.httrack.com
 
 #endif
 
-/* Max URL length */
+/* Maximum URL length, in bytes. Callers size URL/path string buffers to this;
+   anything longer is rejected. */
 #define HTS_URLMAXSIZE 1024
-/* Max command-line length (>=HTS_URLMAXSIZE*2) */
+/* Maximum command-line argument length, in bytes (kept >= HTS_URLMAXSIZE*2 so
+   an addr+path pair always fits). */
 #define HTS_CDLMAXSIZE 1024
 /* MIME-type buffer contract (htsblk.contenttype/charset/contentencoding); holds
    the longest registered MIME type, the Office OOXML ones reaching 73 chars */
@@ -219,24 +238,30 @@ Please visit our Website: http://www.httrack.com
 #define LF "\x0a"
 #endif
 
-/* équivaut à "paramètre vide", par exemple -F (none) */
+/* Sentinel meaning "empty parameter", e.g. -F (none) */
 #define HTS_NOPARAM "(none)"
 #define HTS_NOPARAM2 "\"(none)\""
 
-/* maximum et minimum */
+/* Larger/smaller of two values. Macros: arguments are evaluated twice. */
 #define maximum(A,B) ( (A) > (B) ? (A) : (B) )
+
 #define minimum(A,B) ( (A) < (B) ? (A) : (B) )
 
-/* chaine no empty ? (and not null) */
+/* True when A is a non-NULL, non-empty string. */
 #define strnotempty(A) (((A) != NULL && (A)[0] != '\0'))
 
-/* optimisation inline si possible */
+/* 'inline' where the dialect supports it (C++), nothing in plain C. */
 #ifdef __cplusplus
 #define HTS_INLINE inline
 #else
 #define HTS_INLINE
 #endif
 
+/* Marks a symbol as part of the library's public ABI: exported from
+   libhttrack and visible to callers. Symbols without it stay internal (hidden
+   under -fvisibility=hidden). Expands to dllexport when building the library,
+   dllimport when consuming it, and the visibility("default") attribute on
+   ELF. */
 #ifdef _WIN32
 #ifdef LIBHTTRACK_EXPORTS
 #define HTSEXT_API __declspec(dllexport)
@@ -247,6 +272,7 @@ Please visit our Website: http://www.httrack.com
 /* See <http://gcc.gnu.org/wiki/Visibility> */
 #if ( ( defined(__GNUC__) && ( __GNUC__ >= 4 ) ) \
       || ( defined(HAVE_VISIBILITY) && HAVE_VISIBILITY ) )
+
 #define HTSEXT_API __attribute__ ((visibility ("default")))
 #else
 #define HTSEXT_API
@@ -260,10 +286,13 @@ Please visit our Website: http://www.httrack.com
  */
 #if defined(__GNUC__) &&                                                       \
     (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
+
 #define HTS_DEPRECATED(msg) __attribute__((deprecated(msg)))
 #elif defined(__GNUC__)
+
 #define HTS_DEPRECATED(msg) __attribute__((deprecated))
 #elif defined(_MSC_VER) && (_MSC_VER >= 1400)
+
 #define HTS_DEPRECATED(msg) __declspec(deprecated(msg))
 #else
 #define HTS_DEPRECATED(msg)
@@ -277,12 +306,16 @@ Please visit our Website: http://www.httrack.com
 #endif
 #endif
 
-// long long int? (or int)
-// (and int cast for system functions like malloc() )
-
+/* Wide integer types, chosen per platform.
+   LLint:  signed 64-bit counter for byte counts and large sizes (falls back to
+           plain int where 64-bit is unavailable).
+   TStamp: timestamp/duration in the same width (a double in the no-64-bit
+           fallback).
+   LLintP: the printf conversion for an LLint. */
 #if HTS_LONGLONG
 #ifdef LLINT_FORMAT
 typedef LLINT_TYPE LLint;
+
 typedef LLINT_TYPE TStamp;
 
 #define LLintP LLINT_FORMAT
@@ -290,17 +323,21 @@ typedef LLINT_TYPE TStamp;
 
 #ifdef _WIN32
 typedef __int64 LLint;
+
 typedef __int64 TStamp;
 
 #define LLintP "%I64d"
 #elif (defined(_LP64) || defined(__x86_64__) \
        || defined(__powerpc64__) || defined(__64BIT__))
+
 typedef long int LLint;
+
 typedef long int TStamp;
 
 #define LLintP "%ld"
 #else
 typedef long long int LLint;
+
 typedef long long int TStamp;
 
 #define LLintP "%lld"
@@ -315,6 +352,9 @@ typedef int LLint;
 typedef double TStamp;
 #endif
 
+/* Integer type for file offsets/sizes passed to the C library. Widens to
+   LLint (with HTS_FSEEKO for fseeko/ftello) under large-file support, plain
+   int otherwise; INTsysP is its printf conversion. */
 #ifdef LFS_FLAG
 typedef LLint INTsys;
 
@@ -328,8 +368,11 @@ typedef int INTsys;
 #define INTsysP "%d"
 #endif
 
+/* Socket-handle type. An unsigned integer wide enough for a Windows SOCKET;
+   a plain int file descriptor on POSIX. */
 #ifdef _WIN32
 #if defined(_WIN64)
+
 typedef unsigned __int64 T_SOC;
 #else
 typedef unsigned __int32 T_SOC;
@@ -338,7 +381,7 @@ typedef unsigned __int32 T_SOC;
 typedef int T_SOC;
 #endif
 
-/* IPV4, IPV6 and various unified structures */
+/* Buffer size for a printed network address (IPv4 or IPv6, NUL included). */
 #define HTS_MAXADDRLEN 64
 
 #ifdef _WIN32
@@ -346,17 +389,22 @@ typedef int T_SOC;
 #define __cdecl
 #endif
 
-/* mode pour mkdir ET chmod (accès aux fichiers) */
+/* Permission bits for created folders and files (mkdir and chmod).
+   PROTECT_FOLDER is owner-only. With HTS_ACCESS set (the default) the ACCESS_
+   modes also grant group/other read; otherwise they stay owner-only. */
 #define HTS_PROTECT_FOLDER (S_IRUSR|S_IWUSR|S_IXUSR)
+
 #if HTS_ACCESS
 #define HTS_ACCESS_FILE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
+
 #define HTS_ACCESS_FOLDER (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
 #else
 #define HTS_ACCESS_FILE (S_IRUSR|S_IWUSR)
+
 #define HTS_ACCESS_FOLDER (S_IRUSR|S_IWUSR|S_IXUSR)
 #endif
 
-/* vérifier la déclaration des variables préprocesseur */
+/* Sanity-check that the required preprocessor switches are defined */
 #ifndef HTS_DOSNAME
 #error | HTS_DOSNAME Has not been defined.
 #error | Set it to 1 if you are under DOS, 0 under Unix.
@@ -366,7 +414,7 @@ typedef int T_SOC;
 #error
 #endif
 #ifndef HTS_ACCESS
-/* Par défaut, accès à tous les utilisateurs */
+/* Default: files readable by all users */
 #define HTS_ACCESS 1
 #endif
 
@@ -375,13 +423,13 @@ typedef int T_SOC;
 
 /* HTSLib */
 
-// Cache DNS, accélère les résolution d'adresses
+// Enable the DNS cache (speeds up address resolution)
 #define HTS_DNSCACHE 1
 
-// ID d'une pseudo-socket locale pour les file://
+// Pseudo-socket id standing in for a local file:// transfer
 #define LOCAL_SOCKET_ID -2
 
-// taille de chaque buffer (10 sockets 650 ko)
+// Per-connection transfer buffer size, in bytes
 #define TAILLE_BUFFER 65536
 
 #ifdef HTS_DO_NOT_USE_PTHREAD
@@ -405,6 +453,7 @@ struct mlink {
   int id;
   struct mlink *next;
 };
+
 static const t_htsboundary htsboundary = 0xDEADBEEF;
 #endif
 #endif
@@ -418,7 +467,7 @@ static const t_htsboundary htsboundary = 0xDEADBEEF;
 /* Debugging                                                    */
 /* ------------------------------------------------------------ */
 
-// débuggage types
+// type-detection debug
 #define DEBUG_SHOWTYPES 0
 // backing debug
 #define BDEBUG 0
@@ -436,28 +485,28 @@ static const t_htsboundary htsboundary = 0xDEADBEEF;
 #define DEBUG_ROBOTS 0
 // debug hash
 #define DEBUG_HASH 0
-// Vérification d'intégrité
+// integrity-check debug
 #define DEBUG_CHECKINT 0
 // nbr sockets debug
 #define NSDEBUG 0
 
-// débuggage HTSLib
+// HTSLib debug
 #define HDEBUG 0
 // surveillance de la connexion
 #define CNXDEBUG 0
 // debuggage cookies
 #define DEBUG_COOK 0
-// débuggage hard..
+// heavy/low-level debug
 #define HTS_WIDE_DEBUG 0
 // debuggage deletehttp et cie
 #define HTS_DEBUG_CLOSESOCK 0
-// debug tracage mémoire
+// memory-tracing debug
 #define MEMDEBUG 0
 
 // htsmain
 #define DEBUG_STEPS 0
 
-// Débuggage de contrôle
+// Derived debug control switches
 #if HTS_DEBUG_CLOSESOCK
 #define _HTS_WIDE 1
 #endif

src/htslib.c

@@ -2580,8 +2580,8 @@ HTSEXT_API TStamp mtime_local(void) {
     assert(! "gettimeofday");
   }
 
-  return (TStamp) (((TStamp) tv.tv_sec * (TStamp) 1000)
-                   + ((TStamp) tv.tv_usec / (TStamp) 1000000));
+  return (TStamp) (((TStamp) tv.tv_sec * (TStamp) 1000) +
+                   ((TStamp) tv.tv_usec / (TStamp) 1000));
 #else
   struct timeb B;
   ftime(&B);

src/htsmodules.h

@@ -31,10 +31,15 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsmodules.h
+    Loadable-parser (external module) interface. The engine hands a downloaded
+    object to a module via htsmoduleStruct; the module reports discovered links
+    back through the addLink callback. */
+
 #ifndef HTS_MODULES
 #define HTS_MODULES
 
-/* Forware definitions */
+/* Forward definitions */
 #ifndef HTS_DEF_FWSTRUCT_lien_url
 #define HTS_DEF_FWSTRUCT_lien_url
 typedef struct lien_url lien_url;
@@ -56,18 +61,18 @@ typedef struct cache_back cache_back;
 typedef struct hash_struct hash_struct;
 #endif
 
-/* Function type to add links inside the module 
-  link : link to add (absolute or relative)
-  str : structure defined below
-  Returns 1 if the link was added, 0 if not
-*/
+/** Callback a module invokes to report a discovered link.
+    str: the per-object context the module was called with.
+    link: link to add (absolute or relative); the engine copies it.
+    Returns 1 if the engine accepted/queued the link, 0 if it was rejected. */
 #ifndef HTS_DEF_FWSTRUCT_htsmoduleStruct
 #define HTS_DEF_FWSTRUCT_htsmoduleStruct
 typedef struct htsmoduleStruct htsmoduleStruct;
 #endif
 typedef int (*t_htsAddLink) (htsmoduleStruct * str, char *link);
 
-/* Structure passed to the module */
+/** Per-object context passed to a parser module for one downloaded file.
+    Field access classes are noted; engine owns all pointers unless stated. */
 struct htsmoduleStruct {
   /* Read-only elements */
   const char *filename;         /* filename (C:\My Web Sites\...) */
@@ -119,21 +124,39 @@ struct htsmoduleStruct {
 extern "C" {
 #endif
 
-/* Used to wrap module initialization */
-/* return 1 if init was ok */
+/** Module lifecycle hooks. Init/PlugInit return 1 on success, 0 on failure;
+    Exit returns its own status (ignored by the engine). */
 typedef int (*t_htsWrapperInit) (char *fn, char *args);
+
 typedef int (*t_htsWrapperExit) (void);
+
 typedef int (*t_htsWrapperPlugInit) (char *args);
 
 /* Library internal definictions */
 #ifdef HTS_INTERNAL_BYTECODE
+
+/** Capabilities string ("-noV6", "-nossl", ...) followed by "+name" for each
+    loaded module. Returned pointer aliases opt->state.HTbuff; do not free, and
+    it is overwritten by the next call. */
 HTSEXT_API const char *hts_get_version_info(httrackp * opt);
+
+/** Static capabilities string set by htspe_init(); valid for the process
+    lifetime, do not free. */
 HTSEXT_API const char *hts_is_available(void);
+
+/** Initialize the module subsystem (idempotent): builds the capabilities
+    string and, on Windows, hardens the DLL search path. */
 extern void htspe_init(void);
+
+/** Tear-down counterpart of htspe_init(); currently a no-op. */
 extern void htspe_uninit(void);
+
+/** Run the external-parser callbacks for the object described by str.
+    Returns the parse callback result (>=0) on a handled object, or -1 if no
+    module claimed it or its wrapper_name is blacklisted. */
 extern int hts_parse_externals(htsmoduleStruct * str);
 
-/*extern int swf_is_available;*/
+/** Nonzero if IPv6 support was compiled in (== HTS_INET6). */
 extern int V6_is_available;
 #endif
 

src/htsnet.h

@@ -32,6 +32,11 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htsnet.h
+    Socket/connection layer. Provides SOCaddr, an opaque IPv4/IPv6
+   socket-address wrapper, plus accessor macros so callers never branch on
+   address family. Builds on htsbasenet.h. */
+
 #ifndef HTS_DEFNETH
 #define HTS_DEFNETH
 
@@ -43,32 +48,32 @@ Please visit our Website: http://www.httrack.com
 #include <string.h>
 #include <ctype.h>
 #ifdef _WIN32
- // pour read
+// for read
 #include <io.h>
- // pour FindFirstFile
+// for FindFirstFile
 #include <winbase.h>
 typedef USHORT in_port_t;
+
 typedef ADDRESS_FAMILY sa_family_t;
 #else
- //typedef int T_SOC;
 #define INVALID_SOCKET -1
 #include <netdb.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <sys/time.h>
- /* Force for sun env. */
+/* Force BSD_COMP for Sun environments. */
 #ifndef BSD_COMP
 #define BSD_COMP
 #endif
 #include <sys/ioctl.h>
- /* gethostname & co */
+/* gethostname & co */
 #ifndef _WIN32
 #include <unistd.h>
 #endif
- /* inet_addr */
+/* inet_addr */
 #include <arpa/inet.h>
- // pas la peine normalement..
+/* normally not needed; provide in_addr_t where the platform lacks it */
 #ifndef HTS_DO_NOT_REDEFINE_in_addr_t
 typedef unsigned long in_addr_t;
 #endif
@@ -78,14 +83,16 @@ typedef unsigned long in_addr_t;
 extern "C" {
 #endif
 
-/* Ipv4 structures */
+/** Raw IP address type: in6_addr when IPv6 is enabled, else in_addr. */
 #if HTS_INET6 != 0
 typedef struct in6_addr INaddr;
 #else
 typedef struct in_addr INaddr;
 #endif
 
-/* This should handle all cases */
+/** Opaque socket address holding either an IPv4 or IPv6 endpoint. Use the
+    SOCaddr_* accessors rather than touching m_addr; sa_family selects the
+    active union member. */
 #ifndef HTS_DEF_FWSTRUCT_SOCaddr
 #define HTS_DEF_FWSTRUCT_SOCaddr
 typedef struct SOCaddr SOCaddr;
@@ -103,6 +110,8 @@ struct SOCaddr {
   } m_addr;
 };
 
+/** Pointer to the port field (network byte order) for the active family.
+    Asserts on NULL or an unset/unknown family. */
 static HTS_INLINE HTS_UNUSED in_port_t* SOCaddr_sinport_(SOCaddr *const addr,
                                                          const char *file, const int line) {
   assertf_(addr != NULL, file, line);
@@ -122,6 +131,8 @@ static HTS_INLINE HTS_UNUSED in_port_t* SOCaddr_sinport_(SOCaddr *const addr,
   }
 }
 
+/** Length of the active sockaddr (sockaddr_in or sockaddr_in6), or 0 if the
+    family is unset/unknown. The 0 case doubles as the "not valid" test. */
 static HTS_INLINE HTS_UNUSED socklen_t SOCaddr_size_(const SOCaddr*const addr,
                                                      const char *file, const int line) {
   assertf_(addr != NULL, file, line);
@@ -140,33 +151,52 @@ static HTS_INLINE HTS_UNUSED socklen_t SOCaddr_size_(const SOCaddr*const addr,
   }
 }
 
+/** Reset to the unset state (family AF_UNSPEC), making the address invalid. */
 static HTS_INLINE HTS_UNUSED void SOCaddr_clear_(SOCaddr*const addr,
                                                  const char *file, const int line) {
   assertf_(addr != NULL, file, line);
   addr->m_addr.sa.sa_family = AF_UNSPEC;
 }
 
-/* Ipv4/6 structure members */
-#define SOCaddr_sinfamily(server)   ((server).m_addr.sa.sa_family)
-#define SOCaddr_sinport(server)     (*SOCaddr_sinport_(&(server), __FILE__, __LINE__))
-#define SOCaddr_size(server)        (SOCaddr_size_(&(server), __FILE__, __LINE__))
-#define SOCaddr_is_valid(server)    (SOCaddr_size_(&(server), __FILE__, __LINE__) != 0 )
-#define SOCaddr_clear(server)       SOCaddr_clear_(&(server), __FILE__, __LINE__)
-#define SOCaddr_sockaddr(server)    ((server).m_addr.sa)
-#define SOCaddr_capacity(server)    sizeof((server).m_addr)
+/* SOCaddr accessors; server is an lvalue SOCaddr, not a pointer. */
+#define SOCaddr_sinfamily(server)                                              \
+  ((server).m_addr.sa.sa_family) /* AF_INET / AF_INET6 */
 
-/* AF_xx */
+#define SOCaddr_sinport(server)                                                \
+  (*SOCaddr_sinport_(&(server), __FILE__,                                      \
+                     __LINE__)) /* port lvalue (network order) */
+
+#define SOCaddr_size(server)                                                   \
+  (SOCaddr_size_(&(server), __FILE__, __LINE__)) /* active sockaddr length */
+
+#define SOCaddr_is_valid(server)                                               \
+  (SOCaddr_size_(&(server), __FILE__, __LINE__) !=                             \
+   0) /* nonzero if family is set */
+
+#define SOCaddr_clear(server) SOCaddr_clear_(&(server), __FILE__, __LINE__)
+
+#define SOCaddr_sockaddr(server)                                               \
+  ((server).m_addr.sa) /* generic struct sockaddr view */
+
+#define SOCaddr_capacity(server)                                               \
+  sizeof((server).m_addr) /* full union size, for recvfrom() etc. */
+
+/** Address family to bind/listen with: AF_INET6 when IPv6 is enabled (dual
+    stack), else AF_INET. */
 #if HTS_INET6 != 0
 #define AFinet AF_INET6
 #else
 #define AFinet AF_INET
 #endif
 
-/* Set port to sockaddr structure */
+/** Set the port (host-order argument, stored network-order) on the active
+ * family. */
 #define SOCaddr_initport(server, port) do { \
   SOCaddr_sinport(server) = htons((in_port_t) (port)); \
 } while(0)
 
+/** Initialize as an all-zero IPv4 wildcard (INADDR_ANY) address; returns its
+    sockaddr length. */
 static HTS_INLINE HTS_UNUSED socklen_t SOCaddr_initany_(SOCaddr*const addr,
                                                         const char *file, const int line) {
   assertf_(addr != NULL, file, line);
@@ -175,13 +205,15 @@ static HTS_INLINE HTS_UNUSED socklen_t SOCaddr_initany_(SOCaddr*const addr,
   return SOCaddr_size_(addr, file, line);
 }
 
+/** Initialize server as an IPv4 wildcard (INADDR_ANY) address. */
 #define SOCaddr_initany(server) do { \
   SOCaddr_initany_(&(server), __FILE__, __LINE__); \
 } while(0)
 
-/*
-  Copy sockaddr_in/sockaddr_in6/raw IPv4/raw IPv6 to our opaque SOCaddr
-*/
+/** Populate server from data. data_size selects the source form: a full
+    sockaddr_in / sockaddr_in6, or a raw 4-byte (IPv4) / 16-byte (IPv6) address
+    with port zeroed. Any other size leaves an AF_INET shell. Returns the
+    resulting sockaddr length. */
 static HTS_UNUSED socklen_t SOCaddr_copyaddr_(SOCaddr*const server, 
                                               const void *data, const size_t data_size,
                                               const char *file, const int line) {
@@ -214,20 +246,24 @@ static HTS_UNUSED socklen_t SOCaddr_copyaddr_(SOCaddr*const server,
   return SOCaddr_size_(server, file, line);
 }
 
+/** Copy hpaddr (length hpsize) into server, writing the result length into the
+    lvalue server_len (int). See SOCaddr_copyaddr_ for accepted forms. */
 #define SOCaddr_copyaddr(server, server_len, hpaddr, hpsize) do { \
   server_len = (int) SOCaddr_copyaddr_(&(server), hpaddr, hpsize, __FILE__, __LINE__); \
 } while(0)
 
+/** Like SOCaddr_copyaddr but discards the result length. */
 #define SOCaddr_copyaddr2(server, hpaddr, hpsize) do { \
   (void) SOCaddr_copyaddr_(&(server), hpaddr, hpsize, __FILE__, __LINE__); \
 } while(0)
 
+/** Copy one SOCaddr (src) into another (dest), preserving family and port. */
 #define SOCaddr_copy_SOCaddr(dest, src) do { \
   SOCaddr_copyaddr_(&(dest), &(src).m_addr.sa, SOCaddr_size(src), __FILE__, __LINE__); \
 } while(0)
 
-/* Get dotted address */
-
+/** Write the numeric (dotted/colon) host of ss into namebuf (capacity
+    namebuflen), scope id stripped. On failure namebuf becomes "". */
 static HTS_UNUSED void SOCaddr_inetntoa_(char *namebuf, size_t namebuflen, 
                                          SOCaddr *const ss,
                                          const char *file, const int line) {
@@ -248,13 +284,14 @@ static HTS_UNUSED void SOCaddr_inetntoa_(char *namebuf, size_t namebuflen,
   }
 }
 
+/** Numeric host of ss into namebuf (capacity namebuflen); "" on failure. */
 #define SOCaddr_inetntoa(namebuf, namebuflen, ss) \
   SOCaddr_inetntoa_(namebuf, namebuflen, &(ss), __FILE__, __LINE__)
 
-/* Get protocol ID */
+/** Single-char family tag: '1' for IPv4, '2' otherwise (used in the cache). */
 #define SOCaddr_getproto(ss) ( SOCaddr_size(ss) == sizeof(struct sockaddr_in) ? '1' : '2')
 
-/* Socket length type */
+/** Length type for socket APIs (getsockname, accept, ...). */
 typedef socklen_t SOClen;
 
 #ifdef __cplusplus

src/htsopt.h

@@ -81,38 +81,41 @@ struct String {
 
 /* Defines */
 #define CATBUFF_SIZE (STRING_SIZE*2*2)
+
 #define STRING_SIZE 2048
 
-/* Proxy structure */
+/* Proxy configuration. */
 #ifndef HTS_DEF_FWSTRUCT_t_proxy
 #define HTS_DEF_FWSTRUCT_t_proxy
 typedef struct t_proxy t_proxy;
 #endif
 struct t_proxy {
-  int active;
-  String name;
-  int port;
-  String bindhost;              // bind this host
+  int active;      /**< nonzero if a proxy is configured */
+  String name;     /**< proxy host name */
+  int port;        /**< proxy port */
+  String bindhost; /**< local address to bind the outgoing socket to */
 };
 
-/* Structure utile pour copier en bloc les paramètres */
+/* Bundle of filter pointers, kept together for bulk copy. */
 #ifndef HTS_DEF_FWSTRUCT_htsfilters
 #define HTS_DEF_FWSTRUCT_htsfilters
 typedef struct htsfilters htsfilters;
 #endif
 struct htsfilters {
-  char ***filters;
-  int *filptr;
-  //int*    filter_max;
+  char ***filters; /**< pointer to the +/-pattern filter array */
+  int *filptr;     /**< pointer to the current filter count */
+  // int*    filter_max;
 };
 
 /* User callbacks chain */
 typedef int (*htscallbacksfncptr) (void);
+
 typedef struct htscallbacks htscallbacks;
+
 struct htscallbacks {
-  void *moduleHandle;
-  htscallbacksfncptr exitFnc;
-  htscallbacks *next;
+  void *moduleHandle; /**< handle of the module that registered the callback */
+  htscallbacksfncptr exitFnc; /**< function to run on engine exit */
+  htscallbacks *next;         /**< next entry in the callback chain */
 };
 
 /* filenote() internal file structure */
@@ -188,14 +191,14 @@ typedef enum hts_log_type {
 } hts_log_type;
 #endif
 
-/* Structure état du miroir */
+/* Mirror cancellation list node. */
 #ifndef HTS_DEF_FWSTRUCT_htsoptstatecancel
 #define HTS_DEF_FWSTRUCT_htsoptstatecancel
 typedef struct htsoptstatecancel htsoptstatecancel;
 #endif
 struct htsoptstatecancel {
-  char *url;
-  htsoptstatecancel *next;
+  char *url;               /**< URL flagged to be cancelled */
+  htsoptstatecancel *next; /**< next cancellation entry */
 };
 
 /* Mutexes */
@@ -210,48 +213,48 @@ typedef struct htsmutex_s htsmutex_s, *htsmutex;
 typedef struct struct_coucal struct_coucal, *coucal;
 #endif
 
-/* Structure état du miroir */
+/* Mirror runtime state (mutable engine state, not user options). */
 #ifndef HTS_DEF_FWSTRUCT_htsoptstate
 #define HTS_DEF_FWSTRUCT_htsoptstate
 typedef struct htsoptstate htsoptstate;
 #endif
 struct htsoptstate {
-  htsmutex lock;                /* 3.41 */
+  htsmutex lock; /**< guards this state block */
   /* */
-  int stop;
+  int stop; /**< set to request the mirror to stop */
   int exit_xh;
   int back_add_stats;
   /* */
-  int mimehtml_created;
-  String mimemid;
-  FILE *mimefp;
-  int delayedId;
+  int mimehtml_created; /**< MIME/MHTML output already started */
+  String mimemid;       /**< MIME multipart boundary id */
+  FILE *mimefp;         /**< MIME/MHTML output file */
+  int delayedId;        /**< counter for delayed-type-check ids */
   /* */
-  filenote_strc strc;
-  /* Functions context (avoir thread variables!) */
-  htscallbacks callbacks;
-  concat_strc concat;
-  usercommand_strc usercmd;
-  fspc_strc fspc;
+  filenote_strc strc; /**< filenote() listing state */
+  /* Per-call function contexts (thread-local scratch, avoids globals) */
+  htscallbacks callbacks;   /**< user callback chain head */
+  concat_strc concat;       /**< concat() rotating buffers */
+  usercommand_strc usercmd; /**< pending user shell command */
+  fspc_strc fspc;           /**< error/warning/info counters */
   char *userhttptype;
-  int verif_backblue_done;
+  int verif_backblue_done; /**< backblue.gif/fade.gif already emitted */
   int verif_external_status;
-  t_dnscache *dns_cache;
-  int dns_cache_nthreads;
+  t_dnscache *dns_cache;  /**< DNS resolution cache */
+  int dns_cache_nthreads; /**< number of in-flight DNS resolver threads */
   /* HTML parsing state */
-  char _hts_errmsg[HTS_CDLMAXSIZE + 256];
+  char _hts_errmsg[HTS_CDLMAXSIZE + 256]; /**< last engine error message */
   int _hts_in_html_parsing;
   int _hts_in_html_done;
   int _hts_in_html_poll;
   int _hts_setpause;
-  int _hts_in_mirror;
-  char **_hts_addurl;
+  int _hts_in_mirror; /**< nonzero while a mirror is running */
+  char **_hts_addurl; /**< extra URLs to inject at runtime */
   int _hts_cancel;
-  htsoptstatecancel *cancel;    /* 3.41 */
+  htsoptstatecancel *cancel; /**< list of URLs flagged for cancellation */
   char HTbuff[2048];
   unsigned int debug_state;
-  unsigned int tmpnameid;       /* 3.41 */
-  int is_ended;                 /* 3.48-14 */
+  unsigned int tmpnameid; /**< counter for temporary file names */
+  int is_ended;           /**< mirror has finished */
 };
 
 /* Library handles */
@@ -264,12 +267,13 @@ typedef struct htslibhandles htslibhandles;
 typedef struct htslibhandle htslibhandle;
 #endif
 struct htslibhandle {
-  char *moduleName;
-  void *handle;
+  char *moduleName; /**< name of a loaded external module */
+  void *handle;     /**< dlopen() handle for it */
 };
+
 struct htslibhandles {
-  int count;
-  htslibhandle *handles;
+  int count;             /**< number of loaded module handles */
+  htslibhandle *handles; /**< array of loaded module handles */
 };
 
 /* Javascript parser flags */
@@ -286,176 +290,192 @@ typedef enum htsparsejava_flags {
 typedef struct lien_buffers lien_buffers;
 #endif
 
-// paramètres httrack (options)
+/*
+ * Per-mirror options and state block. This is the central HTTrack parameters
+ * structure: created by hts_create_opt(), it carries every tunable option for
+ * one mirror and embeds the live engine state, and is then consumed by
+ * hts_main2().
+ *
+ * Callers normally configure it through the command-line argv vector (the
+ * option parser), not by writing fields directly. The only fields real
+ * consumers poke directly are 'log' and 'errlog' (set either to NULL to
+ * silence logging).
+ */
 #ifndef HTS_DEF_FWSTRUCT_httrackp
 #define HTS_DEF_FWSTRUCT_httrackp
 typedef struct httrackp httrackp;
 #endif
 struct httrackp {
-  size_t size_httrackp;         // size of this structure
+  size_t size_httrackp; /**< size of this structure (version/ABI guard) */
   /* */
-  int wizard;                   // wizard aucun/grand/petit
-  int flush;                    // fflush sur les fichiers log
-  int travel;                   // type de déplacements (same domain etc)
-  int seeker;                   // up & down
-  int depth;                    // nombre de niveaux de récursion
-  int extdepth;                 // nombre de niveaux de récursion à l'éxtérieur
-  int urlmode;                  // liens relatifs etc   
+  int wizard;   /**< interactive wizard level (none/full/light) */
+  int flush;    /**< fflush() log files after each write */
+  int travel;   /**< link-following scope (same domain, etc.) */
+  int seeker;   /**< allowed direction: go up and/or down the tree */
+  int depth;    /**< maximum recursion depth (-rN) */
+  int extdepth; /**< maximum recursion depth outside the start domain */
+  int urlmode;  /**< saved-link rewriting style (relative, absolute, etc.) */
   int no_type_change;           // do not change file type according to MIME
-  int debug;                    // mode débug log
-  int getmode;                  // sauver html, images..
-  FILE *log;                    // fichier log
-  FILE *errlog;                 // et erreur
-  LLint maxsite;                // taille max site
-  LLint maxfile_nonhtml;        // taille max non html
-  LLint maxfile_html;           // taille max html
-  int maxsoc;                   // nbre sockets
-  LLint fragment;               // fragmentation d'un site
-  int nearlink;                 // prendre les images/data proche d'une page mais à l'extérieur
-  int makeindex;                // faire un index
-  int kindex;                   // et un index 'keyword'
-  int delete_old;               // effacer anciens fichiers
-  int timeout;                  // nombre de secondes de timeout
-  int rateout;                  // nombre d'octets minium pour le transfert
-  int maxtime;                  // temps max en secondes
-  int maxrate;                  // taux de transfert max
-  float maxconn;                // nombre max de connexions/s
-  int waittime;                 // démarrage programmé
-  int cache;                    // génération d'un cache
-  //int aff_progress;     // barre de progression
-  int shell;                    // gestion d'un shell par pipe stdin/stdout
-  t_proxy proxy;                // configuration du proxy
-  int savename_83;              // conversion 8-3 pour les noms de fichiers
-  int savename_type;            // type de noms: structure originale/html-images en un seul niveau
-  String savename_userdef;      // structure userdef (ex: %h%p/%n%q.%t)
+  int debug;                    /**< debug logging level */
+  int getmode;           /**< what to fetch (HTML, images, ...) bitmask */
+  FILE *log;             /**< informational log stream; NULL mutes it */
+  FILE *errlog;          /**< error log stream; NULL mutes it */
+  LLint maxsite;         /**< max total bytes for the whole mirror */
+  LLint maxfile_nonhtml; /**< max bytes per non-HTML file */
+  LLint maxfile_html;    /**< max bytes per HTML file */
+  int maxsoc;            /**< max simultaneous sockets (-cN) */
+  LLint fragment;        /**< split site after this many bytes */
+  int nearlink;   /**< also fetch images/data adjacent to a page but off-site */
+  int makeindex;  /**< build a top-level index.html */
+  int kindex;     /**< build a keyword index */
+  int delete_old; /**< delete locally obsolete files after update */
+  int timeout;    /**< connection timeout in seconds */
+  int rateout;    /**< minimum transfer rate (bytes/s) before abort */
+  int maxtime;    /**< max total mirror duration in seconds */
+  int maxrate;    /**< max transfer rate cap (bytes/s) */
+  float maxconn;  /**< max connections per second */
+  int waittime;   /**< scheduled start time (wall-clock seconds) */
+  int cache;      /**< cache generation mode */
+  // int aff_progress;     // progress bar
+  int shell;         /**< driven by a shell over stdin/stdout pipes */
+  t_proxy proxy;     /**< proxy configuration */
+  int savename_83;   /**< force 8.3 (DOS) file names */
+  int savename_type; /**< saved-name layout (original tree, flat, ...) */
+  String
+      savename_userdef; /**< user-defined name template (e.g. %h%p/%n%q.%t) */
   int savename_delayed;         // delayed type check
   int delayed_cached;           // delayed type check can be cached to speedup updates
-  int mimehtml;                 // MIME-html
-  int user_agent_send;          // user agent (ex: httrack/1.0 [sun])
-  String user_agent;            //
-  String referer;               // referer 
-  String from;                  // from
-  String path_log;              // chemin pour cache et log
-  String path_html;             // chemin pour miroir
-  String path_html_utf8;        // chemin pour miroir, UTF-8
-  String path_bin;              // chemin pour templates
-  int retry;                    // nombre d'essais supplémentaires en cas d'échec
-  int makestat;                 // mettre à jour un fichier log de statistiques de transfert
-  int maketrack;                // mettre à jour un fichier log de statistiques d'opérations
-  int parsejava;                // parsing des classes java pour récupérer les class, gif & cie ; see htsparsejava_flags
-  int hostcontrol;              // abandon d'un host trop lent etc.
-  int errpage;                  // générer une page d'erreur en cas de 404 etc.
-  int check_type;               // si type inconnu (cgi,asp,/) alors tester lien (et gérer moved éventuellement)
-  int all_in_cache;             // tout mettre en cache!
-  int robots;                   // traitement des robots
-  int external;                 // pages externes->pages d'erreur
-  int passprivacy;              // pas de mot de pass dans les liens externes?
-  int includequery;             // include la query-string
-  int mirror_first_page;        // miroir des liens
-  String sys_com;               // commande système
-  int sys_com_exec;             // executer commande 
-  int accept_cookie;            // gestion des cookies
-  t_cookie *cookie;
-  int http10;                   // forcer http 1.0
-  int nokeepalive;              // pas de keep-alive
-  int nocompression;            // pas de compression
-  int sizehack;                 // forcer réponse "mis à jour" si taille identique
+  int mimehtml;                 /**< produce a single MIME/MHTML archive */
+  int user_agent_send;          /**< send a User-Agent header */
+  String user_agent;            /**< User-Agent value (e.g. httrack/1.0) */
+  String referer;               /**< Referer value to send */
+  String from;                  /**< From value to send */
+  String path_log;              /**< directory for cache and logs */
+  String path_html;             /**< output directory for the mirror */
+  String path_html_utf8; /**< output directory for the mirror, UTF-8 form */
+  String path_bin;       /**< directory for HTML templates */
+  int retry;             /**< extra retries on a failed transfer */
+  int makestat;          /**< maintain a transfer-statistics log */
+  int maketrack;         /**< maintain an operations-statistics log */
+  int parsejava;         /**< Java/JS parsing mode; see htsparsejava_flags */
+  int hostcontrol;       /**< drop hosts that are too slow, etc. */
+  int errpage;           /**< generate an error page on 404 and similar */
+  int check_type;   /**< probe unknown-type links (cgi/asp/dir) and follow moves
+                     */
+  int all_in_cache; /**< keep all retrieved data in the cache */
+  int robots;       /**< robots.txt handling level */
+  int external;     /**< render external links as error pages */
+  int passprivacy;  /**< strip passwords from external links */
+  int includequery; /**< include the query string in saved names */
+  int mirror_first_page;        /**< only mirror the links of the first page */
+  String sys_com;               /**< system command to run */
+  int sys_com_exec;             /**< actually execute sys_com */
+  int accept_cookie;            /**< accept and send cookies */
+  t_cookie *cookie;             /**< cookie store */
+  int http10;                   /**< force HTTP/1.0 */
+  int nokeepalive;              /**< disable keep-alive */
+  int nocompression;            /**< disable content compression */
+  int sizehack;                 /**< treat same-size response as "updated" */
   int urlhack;                  // force "url normalization" to avoid loops
-  int tolerant;                 // accepter content-length incorrect
-  int parseall;                 // essayer de tout parser (tags inconnus contenant des liens, par exemple)
-  int parsedebug;               // débugger parser (debug!)
-  int norecatch;                // ne pas reprendre les fichiers effacés localement par l'utilisateur
-  int verbosedisplay;           // animation textuelle
-  String footer;                // ligne d'infos
-  int maxcache;                 // maximum en mémoire au niveau du cache (backing)
-  //int maxcache_anticipate; // maximum de liens à anticiper (majorant)
-  int ftp_proxy;                // proxy http pour ftp
-  String filelist;              // fichier liste URL à inclure
-  String urllist;               // fichier liste de filtres à inclure
-  htsfilters filters;           // contient les pointeurs pour les filtres
+  int tolerant;                 /**< accept an incorrect Content-Length */
+  int parseall;   /**< parse aggressively, including unknown tags with links */
+  int parsedebug; /**< parser debug mode */
+  int norecatch;  /**< do not re-fetch files the user deleted locally */
+  int verbosedisplay; /**< animated text progress display */
+  String footer;      /**< footer/info line injected into pages */
+  int maxcache;       /**< in-memory cache backing limit (bytes) */
+  // int maxcache_anticipate; // maximum links to anticipate (upper bound)
+  int ftp_proxy;                /**< use the HTTP proxy for FTP too */
+  String filelist;              /**< file listing URLs to include */
+  String urllist;               /**< file listing filters to include */
+  htsfilters filters;           /**< filter pointers (+/-pattern rules) */
   hash_struct *hash;            // hash structure
   lien_url **liens;             // links
   int lien_tot;                 // top index of "links" heap (always out-of-range)
   lien_buffers *liensbuf;       // links buffers
   robots_wizard *robotsptr;     // robots ptr
-  String lang_iso;              // en, fr ..
+  String lang_iso;              /**< Accept-Language value (en, fr, ...) */
   String accept;                // Accept:
   String headers;               // Additional headers
   String mimedefs;              // ext1=mimetype1\next2=mimetype2..
-  String mod_blacklist;         // (3.41)
+  String mod_blacklist;         /**< blacklisted modules */
   int convert_utf8;             // filenames UTF-8 conversion (3.46)
   //
-  int maxlink;                  // nombre max de liens
-  int maxfilter;                // nombre max de filtres
+  int maxlink;   /**< max number of links */
+  int maxfilter; /**< max number of filters */
   //
-  const char *exec;             // adresse du nom de l'éxecutable
+  const char *exec; /**< path of the running executable */
   //
-  int quiet;                    // poser des questions autres que wizard?
-  int keyboard;                 // vérifier stdin
+  int quiet;                    /**< suppress non-wizard questions */
+  int keyboard;                 /**< poll stdin for keyboard input */
   int bypass_limits;            // bypass built-in limits
   int background_on_suspend;    // background process on suspend signal
   //
-  int is_update;                // c'est une update (afficher "File updated...")
-  int dir_topindex;             // reconstruire top index par la suite
+  int is_update;    /**< this run is an update (show "File updated...") */
+  int dir_topindex; /**< rebuild the top index afterwards */
   //
   // callbacks
-  t_hts_htmlcheck_callbacks *callbacks_fun;
+  t_hts_htmlcheck_callbacks
+      *callbacks_fun; /**< user HTML/parsing callback table */
   // store library handles
-  htslibhandles libHandles;
+  htslibhandles libHandles; /**< loaded external module handles */
   //
-  htsoptstate state;            // state
+  htsoptstate state; /**< embedded live engine state */
 };
 
-// stats for httrack
+/* Running statistics for a mirror. */
 #ifndef HTS_DEF_FWSTRUCT_hts_stat_struct
 #define HTS_DEF_FWSTRUCT_hts_stat_struct
 typedef struct hts_stat_struct hts_stat_struct;
 #endif
 struct hts_stat_struct {
-  LLint HTS_TOTAL_RECV;         // flux entrant reçu
-  LLint stat_bytes;             // octets écrits sur disque
-  // int HTS_TOTAL_RECV_STATE;  // status: 0 tout va bien 1: ralentir un peu 2: ralentir 3: beaucoup
-  TStamp stat_timestart;        // départ
+  LLint HTS_TOTAL_RECV; /**< total bytes received from the network */
+  LLint stat_bytes;     /**< total bytes written to disk */
+  // int HTS_TOTAL_RECV_STATE;  // status: 0 ok 1: slow down a little 2: slow
+  // down 3: a lot
+  TStamp stat_timestart; /**< mirror start time */
   //
-  LLint total_packed;           // flux entrant compressé reçu
-  LLint total_unpacked;         // flux entrant compressé reçu
-  int total_packedfiles;        // fichiers compressés
+  LLint total_packed;    /**< compressed bytes received (on the wire) */
+  LLint total_unpacked;  /**< bytes after decompression */
+  int total_packedfiles; /**< number of compressed files */
   //
-  TStamp istat_timestart[2];    // départ pour calcul instantanné
-  LLint istat_bytes[2];         // calcul pour instantanné
-  TStamp istat_reference01;     // top départ donné par #0 à #1
-  int istat_idlasttimer;        // id du timer qui a récemment donné une stat
+  TStamp
+      istat_timestart[2]; /**< window start times for the instantaneous rate */
+  LLint istat_bytes[2];   /**< window byte counts for the instantaneous rate */
+  TStamp
+      istat_reference01; /**< reference timestamp handed from window #0 to #1 */
+  int istat_idlasttimer; /**< id of the timer that last produced a stat */
   //
-  int stat_files;               // nombre de fichiers écrits
-  int stat_updated_files;       // nombre de fichiers mis à jour
-  int stat_background;          // nombre de fichiers écrits en arrière plan
+  int stat_files;         /**< number of files written */
+  int stat_updated_files; /**< number of files updated */
+  int stat_background;    /**< number of files written in the background */
   //
-  int stat_nrequests;           // nombre de requêtes sur socket
-  int stat_sockid;              // nombre de sockets allouées au total
-  int stat_nsocket;             // nombre de sockets
-  int stat_errors;              // nombre d'erreurs
-  int stat_errors_front;        // idem, mais au tout premier niveau
-  int stat_warnings;            // '' warnings
-  int stat_infos;               // '' infos
-  int nbk;                      // fichiers anticipés en arrière plan et terminés
-  LLint nb;                     // données transférées actuellement (estimation)
+  int stat_nrequests;    /**< number of requests issued on sockets */
+  int stat_sockid;       /**< total number of sockets ever allocated */
+  int stat_nsocket;      /**< current number of open sockets */
+  int stat_errors;       /**< number of errors */
+  int stat_errors_front; /**< errors at the very first level */
+  int stat_warnings;     /**< number of warnings */
+  int stat_infos;        /**< number of info messages */
+  int nbk;               /**< background-anticipated files now completed */
+  LLint nb;              /**< bytes currently being transferred (estimate) */
   //
-  LLint rate;
+  LLint rate; /**< current transfer rate */
   //
-  TStamp last_connect;          // last connect() call
-  TStamp last_request;          // last request issued
+  TStamp last_connect; /**< time of the last connect() call */
+  TStamp last_request; /**< time of the last request issued */
 };
 
-// structure pour paramètres supplémentaires lors de la requête
+/* Extra per-request parameters (mirrors httrackp request options). */
 #ifndef HTS_DEF_FWSTRUCT_htsrequest_proxy
 #define HTS_DEF_FWSTRUCT_htsrequest_proxy
 typedef struct htsrequest_proxy htsrequest_proxy;
 #endif
 struct htsrequest_proxy {
-  int active;
-  const char* name;
-  int port;
-  const char* bindhost;           // bind this host
+  int active;           /**< nonzero if a proxy is used for this request */
+  const char *name;     /**< proxy host name */
+  int port;             /**< proxy port */
+  const char *bindhost; /**< local address to bind the outgoing socket to */
 };
 
 #ifndef HTS_DEF_FWSTRUCT_htsrequest
@@ -463,93 +483,93 @@ struct htsrequest_proxy {
 typedef struct htsrequest htsrequest;
 #endif
 struct htsrequest {
-  short int user_agent_send;    // user agent (ex: httrack/1.0 [sun])
-  short int http11;             // l'en tête peut (doit) être signé HTTP/1.1 et non HTTP/1.0
-  short int nokeepalive;        // pas de keep-alive
-  short int range_used;         // Range utilisé
-  short int nocompression;      // Pas de compression
+  short int user_agent_send; /**< send a User-Agent header */
+  short int http11; /**< sign the request as HTTP/1.1 rather than HTTP/1.0 */
+  short int nokeepalive;        /**< disable keep-alive */
+  short int range_used;         /**< a Range header is in use */
+  short int nocompression;      /**< disable compression */
   short int flush_garbage;      // recycled
-  const char* user_agent;
-  const char* referer;
-  const char* from;
-  const char* lang_iso;
-  const char* accept;
-  const char* headers;
-  htsrequest_proxy proxy;       // proxy
+  const char *user_agent;       /**< User-Agent value */
+  const char *referer;          /**< Referer value */
+  const char *from;             /**< From value */
+  const char *lang_iso;         /**< Accept-Language value */
+  const char *accept;           /**< Accept value */
+  const char *headers;          /**< extra request headers */
+  htsrequest_proxy proxy;       /**< proxy for this request */
 };
 
-// structure pour retour d'une connexion/prise d'en tête
+/* Result of a connection / header fetch. */
 #ifndef HTS_DEF_FWSTRUCT_htsblk
 #define HTS_DEF_FWSTRUCT_htsblk
 typedef struct htsblk htsblk;
 #endif
 struct htsblk {
-  int statuscode;               // status-code, -1=erreur, 200=OK,201=..etc (cf RFC1945)
-  short int notmodified;        // page ou fichier NON modifié (transféré)
-  short int is_write;           // sortie sur disque (out) ou en mémoire (adr)
-  short int is_chunk;           // mode chunk
-  short int compressed;         // compressé?
-  short int empty;              // vide?
-  short int keep_alive;         // Keep-Alive?
-  short int keep_alive_trailers;        // ..with trailers extension
-  int keep_alive_t;             // KA timeout
-  int keep_alive_max;           // KA number of requests
-  char *adr;                    // adresse du bloc de mémoire, NULL=vide
-  char *headers;                // adresse des en têtes si présents
-  FILE *out;                    // écriture directe sur disque (si is_write=1)
-  LLint size;                   // taille fichier
-  char msg[80];                 // message éventuel si échec ("\0"=non précisé)
+  int statuscode; /**< HTTP status code; -1=error, 200=OK, ... (RFC1945) */
+  short int notmodified; /**< page/file was not modified (not transferred) */
+  short int is_write;    /**< output goes to disk (out) vs memory (adr) */
+  short int is_chunk;    /**< chunked transfer encoding */
+  short int compressed;  /**< body is compressed */
+  short int empty;       /**< body is empty */
+  short int keep_alive;  /**< connection is keep-alive */
+  short int keep_alive_trailers; /**< keep-alive with trailers extension */
+  int keep_alive_t;              /**< keep-alive timeout (seconds) */
+  int keep_alive_max;            /**< keep-alive max number of requests */
+  char *adr;                     /**< in-memory body buffer; NULL if empty */
+  char *headers;                 /**< received headers, if any */
+  FILE *out;                     /**< destination file when is_write=1 */
+  LLint size;                    /**< body size */
+  char msg[80];                  /**< failure message ("" if none) */
   char contenttype[HTS_MIMETYPE_SIZE];     // content-type (e.g. "text/html")
   char charset[HTS_MIMETYPE_SIZE];         // charset (e.g. "iso-8859-1")
   char contentencoding[HTS_MIMETYPE_SIZE]; // content-encoding (e.g. "gzip")
-  char *location;               // on copie dedans éventuellement la véritable 'location'
-  LLint totalsize;              // taille totale à télécharger (-1=inconnue)
-  short int is_file;            // ce n'est pas une socket mais un descripteur de fichier si 1
-  T_SOC soc;                    // ID socket
-  SOCaddr address;              // IP address
+  char *location;    /**< resolved Location target, if any */
+  LLint totalsize;   /**< total size to download (-1=unknown) */
+  short int is_file; /**< 1 if a file descriptor rather than a socket */
+  T_SOC soc;         /**< socket id */
+  SOCaddr address;   /**< peer IP address */
   int address_size;             // IP address structure length (unused internally)
-  FILE *fp;                     // fichier pour file://
+  FILE *fp;                     /**< file handle for file:// */
 #if HTS_USEOPENSSL
-  short int ssl;                // is this connection a SSL one? (https)
+  short int ssl; /**< nonzero if this is an SSL connection (https) */
   // BIO* ssl_soc;          // SSL structure
-  SSL *ssl_con;                 // connection structure
+  SSL *ssl_con; /**< SSL connection structure */
 #endif
-  char lastmodified[64];        // Last-Modified
-  char etag[256];               // Etag
-  char cdispo[256];             // Content-Disposition coupé
-  LLint crange;                 // Content-Range
-  LLint crange_start;           // Content-Range
-  LLint crange_end;             // Content-Range
-  int debugid;                  // debug connection
+  char lastmodified[64]; /**< Last-Modified value */
+  char etag[256];        /**< ETag value */
+  char cdispo[256];      /**< Content-Disposition filename (truncated) */
+  LLint crange;          /**< Content-Range length */
+  LLint crange_start;    /**< Content-Range start offset */
+  LLint crange_end;      /**< Content-Range end offset */
+  int debugid;           /**< connection debug id */
   /* */
-  htsrequest req;               // paramètres pour la requête
-  /*char digest[32+2];   // digest md5 généré par le moteur ("" si non généré) */
+  htsrequest req; /**< parameters used for the request */
+  /*char digest[32+2];   // md5 digest generated by the engine ("" if none) */
 };
 
-// structure d'un lien
+/* A single link in the crawl. */
 #ifndef HTS_DEF_FWSTRUCT_lien_url
 #define HTS_DEF_FWSTRUCT_lien_url
 typedef struct lien_url lien_url;
 #endif
 struct lien_url {
-  char *adr;                    // adresse
-  char *fil;                    // nom du fichier distant
-  char *sav;                    // nom à sauver sur disque (avec chemin éventuel)
-  char *cod;                    // chemin codebase éventuel si classe java
-  char *former_adr;             // adresse initiale (avant éventuel moved), peut être nulle
-  char *former_fil;             // nom du fichier distant initial (avant éventuel moved), peut être nul
+  char *adr;        /**< host/address part of the URL */
+  char *fil;        /**< remote file path */
+  char *sav;        /**< local save name (with any path) */
+  char *cod;        /**< codebase path for a Java class, if any */
+  char *former_adr; /**< original address before a move; may be NULL */
+  char *former_fil; /**< original remote file before a move; may be NULL */
 
-  int premier;                  // pointeur sur le premier lien qui a donné lieu aux autres liens du domaine
-  int precedent;                // pointeur sur le lien qui a donné lieu à ce lien précis
-  int depth;                    // profondeur autorisée lien ; >0 forte 0=faible
-  int pass2;                    // traiter après les autres, seconde passe. si == -1, lien traité en background
-  char link_import;             // lien importé à la suite d'un moved - ne pas appliquer les règles classiques up/down
-  //int moved;          // pointeur sur moved
-  int retry;                    // nombre de retry restants
-  int testmode;                 // mode test uniquement, envoyer juste un head!
+  int premier;      /**< index of the first link that seeded this domain */
+  int precedent;    /**< index of the link that referenced this one */
+  int depth;        /**< remaining allowed depth; >0 strong, 0 weak */
+  int pass2;        /**< second-pass marker; -1 means handled in background */
+  char link_import; /**< imported after a move; skip the usual up/down rules */
+  // int moved;          // pointer to moved
+  int retry;    /**< remaining retries */
+  int testmode; /**< test only: send just a HEAD */
 };
 
-// chargement de fichiers en 'arrière plan'
+/* A file being fetched in the background. */
 #ifndef HTS_DEF_FWSTRUCT_lien_back
 #define HTS_DEF_FWSTRUCT_lien_back
 typedef struct lien_back lien_back;
@@ -558,43 +578,44 @@ struct lien_back {
 #if DEBUG_CHECKINT
   char magic;
 #endif
-  char url_adr[HTS_URLMAXSIZE * 2];     // adresse
-  char url_fil[HTS_URLMAXSIZE * 2];     // nom du fichier distant
-  char url_sav[HTS_URLMAXSIZE * 2];     // nom à sauver sur disque (avec chemin éventuel)
-  char referer_adr[HTS_URLMAXSIZE * 2]; // adresse host page referer
-  char referer_fil[HTS_URLMAXSIZE * 2]; // fichier page referer
-  char location_buffer[HTS_URLMAXSIZE * 2];     // "location" en cas de "moved" (302,..)
-  char *tmpfile;                // nom à sauver temporairement (compressé)
-  char tmpfile_buffer[HTS_URLMAXSIZE * 2];      // buffer pour le nom à sauver temporairement
-  char send_too[1024];          // données à envoyer en même temps que le header
-  int status;                   // status (-1=non utilisé, 0: prêt, >0: opération en cours)
-  int locked;                   // locked (to be used soon)
-  int testmode;                 // mode de test
-  int timeout;                  // gérer des timeouts? (!=0  : nombre de secondes)
-  TStamp timeout_refresh;       // si oui, time refresh
-  int rateout;                  // timeout refresh? (!=0 : taux minimum toléré en octets/s)
-  TStamp rateout_time;          // si oui, date de départ
-  LLint maxfile_nonhtml;        // taille max d'un fichier non html
-  LLint maxfile_html;           // idem pour un ficheir html
-  htsblk r;                     // structure htsblk de chaque objet en background 
-  int is_update;                // mode update
-  int head_request;             // requète HEAD?
-  LLint range_req_size;         // range utilisé
-  TStamp ka_time_start;         // refresh time for KA 
+  char url_adr[HTS_URLMAXSIZE * 2];     /**< host/address part of the URL */
+  char url_fil[HTS_URLMAXSIZE * 2];     /**< remote file path */
+  char url_sav[HTS_URLMAXSIZE * 2];     /**< local save name (with any path) */
+  char referer_adr[HTS_URLMAXSIZE * 2]; /**< referer page host/address */
+  char referer_fil[HTS_URLMAXSIZE * 2]; /**< referer page file */
+  char
+      location_buffer[HTS_URLMAXSIZE * 2]; /**< Location on a move (302, ...) */
+  char *tmpfile; /**< temporary save name (compressed) */
+  char tmpfile_buffer[HTS_URLMAXSIZE * 2]; /**< storage for tmpfile */
+  char send_too[1024];    /**< data to send together with the header */
+  int status;             /**< -1=unused, 0=ready, >0=operation in progress */
+  int locked;             /**< locked (reserved) */
+  int testmode;           /**< test mode */
+  int timeout;            /**< timeout in seconds (0=none) */
+  TStamp timeout_refresh; /**< last activity time, for timeout tracking */
+  int rateout;            /**< minimum tolerated rate in bytes/s (0=none) */
+  TStamp rateout_time;    /**< start time for the rate window */
+  LLint maxfile_nonhtml;  /**< max bytes for a non-HTML file */
+  LLint maxfile_html;     /**< max bytes for an HTML file */
+  htsblk r;               /**< per-object result block */
+  int is_update;          /**< update mode */
+  int head_request;       /**< this is a HEAD request */
+  LLint range_req_size;   /**< Range request size used */
+  TStamp ka_time_start;   /**< keep-alive refresh start time */
   //
-  int http11;                   // L'en tête doit être signé HTTP/1.1 et non HTTP/1.0
-  int is_chunk;                 // chunk?
-  char *chunk_adr;              // adresse chunk en cours de chargement
-  LLint chunk_size;             // taille chunk en cours de chargement
-  LLint chunk_blocksize;        // taille data declaree par le chunk
-  LLint compressed_size;        // taille compressés (stats uniquement)
+  int http11;       /**< sign the request as HTTP/1.1 rather than HTTP/1.0 */
+  int is_chunk;     /**< chunked transfer */
+  char *chunk_adr;  /**< buffer for the chunk being loaded */
+  LLint chunk_size; /**< size of the chunk being loaded */
+  LLint chunk_blocksize; /**< data size declared by the chunk */
+  LLint compressed_size; /**< compressed size (stats only) */
   //
   //int links_index;        // to access liens[links_index]
   //
-  char info[256];               // éventuel status pour le ftp
-  int stop_ftp;                 // flag stop pour ftp
-  int finalized;                // finalized (optim memory)
-  int early_add;                // was added before link heap saw it
+  char info[256]; /**< status text, e.g. for FTP */
+  int stop_ftp;   /**< stop flag for FTP */
+  int finalized;  /**< finalized (memory optimization) */
+  int early_add;  /**< was added before the link heap saw it */
 #if DEBUG_CHECKINT
   char magic2;
 #endif

src/htssafe.h

@@ -104,6 +104,7 @@ static HTS_UNUSED void abortf_(const char *exp, const char *file, int line) {
  * Check whether 'VAR' is of type char[].
  */
 #if (defined(__GNUC__) && !defined(__cplusplus))
+
 /* Note: char[] and const char[] are compatible */
 #define HTS_IS_CHAR_BUFFER(VAR) ( __builtin_types_compatible_p ( typeof (VAR), char[] ) )
 #else
@@ -139,8 +140,11 @@ static HTS_UNUSED void htssafe_compile_time_check_(void) {
  * (MSVC, ...) keep the previous behavior via the #else branches.
  */
 #if (defined(__GNUC__) && !defined(__cplusplus))
+
 #if defined(__has_attribute)
+
 #if __has_attribute(warning)
+
 #define HTS_BUFF_PTR_ATTR(msg) __attribute__((unused, noinline, warning(msg)))
 #endif
 #endif
@@ -152,29 +156,51 @@ static HTS_UNUSED void htssafe_compile_time_check_(void) {
 
 HTS_BUFF_PTR_ATTR("strcpybuff() destination is a pointer (capacity unknown): "
                   "NOT bounds-checked; use strlcpybuff(dst, src, size)")
+
 static char *strcpybuff_ptr_(char *dest, const char *src) {
   return strcpy(dest, src);
 }
 
 HTS_BUFF_PTR_ATTR("strcatbuff() destination is a pointer (capacity unknown): "
                   "NOT bounds-checked; use strlcatbuff(dst, src, size)")
+
 static char *strcatbuff_ptr_(char *dest, const char *src) {
   return strcat(dest, src);
 }
 
 HTS_BUFF_PTR_ATTR("strncatbuff() destination is a pointer (capacity unknown): "
                   "NOT bounds-checked; use strlcatbuff(dst, src, size)")
+
 static char *strncatbuff_ptr_(char *dest, const char *src, size_t n) {
   return strncat(dest, src, n);
 }
 #endif
 
+/*
+ * SIZE CONTRACT shared by strcpybuff/strcatbuff/strncatbuff (the "buff"
+ * family): the destination bound is taken from sizeof(A), so A MUST be a real
+ * char[] array in scope. The bound is the full array size in bytes, INCLUDING
+ * the terminating NUL. On overflow the *_safe_ helpers do NOT truncate: they
+ * abort() (assertf). On success the result is always NUL-terminated.
+ *
+ * CRITICAL CAVEAT: if A is a bare char* pointer (not an array), sizeof(A) is
+ * the pointer size, not the buffer capacity. There is no way to recover the
+ * real capacity, so these macros SILENTLY DEGRADE to the unbounded raw
+ * strcpy()/strcat()/strncat() while still looking like a checked call. The
+ * bound is lost. On GCC/Clang (C) the pointer case routes through the
+ * *_ptr_ stubs above, which carry a 'warning' attribute to flag the site at
+ * compile time; on other compilers it is silent. When the destination is a
+ * pointer of known capacity, call the explicit-size strlcpybuff/strlcatbuff
+ * (passing the capacity, NUL included) instead.
+ */
+
 /**
  * Append at most N characters from "B" to "A".
- * If "A" is a char[] variable whose size is not sizeof(char*), then the size 
+ * If "A" is a char[] variable whose size is not sizeof(char*), then the size
  * is assumed to be the capacity of this array.
  */
 #if (defined(__GNUC__) && !defined(__cplusplus))
+
 #define strncatbuff(A, B, N) __builtin_choose_expr( HTS_IS_CHAR_BUFFER(A), \
   strncat_safe_(A, sizeof(A), B, \
   HTS_IS_NOT_CHAR_BUFFER(B) ? (size_t) -1 : sizeof(B), N, \
@@ -195,6 +221,7 @@ static char *strncatbuff_ptr_(char *dest, const char *src, size_t n) {
  * is assumed to be the capacity of this array.
  */
 #if (defined(__GNUC__) && !defined(__cplusplus))
+
 #define strcatbuff(A, B) __builtin_choose_expr( HTS_IS_CHAR_BUFFER(A), \
   strncat_safe_(A, sizeof(A), B, \
   HTS_IS_NOT_CHAR_BUFFER(B) ? (size_t) -1 : sizeof(B), (size_t) -1, \
@@ -215,6 +242,7 @@ static char *strncatbuff_ptr_(char *dest, const char *src, size_t n) {
  * is assumed to be the capacity of this array.
  */
 #if (defined(__GNUC__) && !defined(__cplusplus))
+
 #define strcpybuff(A, B) __builtin_choose_expr( HTS_IS_CHAR_BUFFER(A), \
   strcpy_safe_(A, sizeof(A), B, \
   HTS_IS_NOT_CHAR_BUFFER(B) ? (size_t) -1 : sizeof(B), \
@@ -229,6 +257,14 @@ static char *strncatbuff_ptr_(char *dest, const char *src, size_t n) {
   "overflow while copying '" #B "' to '"#A"'", __FILE__, __LINE__) )
 #endif
 
+/*
+ * Explicit-size variants (strlcatbuff/strlncatbuff/strlcpybuff): the
+ * destination capacity is the caller-supplied S (total bytes, NUL included),
+ * NOT derived from sizeof(A). Use these when A is a pointer or its capacity is
+ * not its sizeof. Same abort-on-overflow, always-NUL-terminated contract; no
+ * silent pointer degradation since the bound is passed in.
+ */
+
 /**
  * Append characters of "B" to "A", "A" having a maximum capacity of "S".
  */
@@ -256,6 +292,7 @@ static char *strncatbuff_ptr_(char *dest, const char *src, size_t n) {
 
 /** strnlen replacement (autotools). **/
 #if ( ! defined(_WIN32) && ! defined(HAVE_STRNLEN) )
+
 static HTS_UNUSED size_t strnlen(const char *s, size_t maxlen) {
   size_t i;
   for(i = 0 ; i < maxlen && s[i] != '\0' ; i++) ;
@@ -263,6 +300,10 @@ static HTS_UNUSED size_t strnlen(const char *s, size_t maxlen) {
 }
 #endif
 
+/* strlen of source, but bounded by sizeof_source (its capacity, NUL included).
+   Aborts if source is NULL or has no NUL within that capacity. The sentinel
+   sizeof_source == (size_t)-1 means "capacity unknown", and falls back to the
+   unbounded strlen (used when the source is a pointer rather than an array). */
 static HTS_INLINE HTS_UNUSED size_t strlen_safe_(const char *source, const size_t sizeof_source, 
                                                  const char *file, int line) {
   size_t size;
@@ -273,6 +314,11 @@ static HTS_INLINE HTS_UNUSED size_t strlen_safe_(const char *source, const size_
   return size;
 }
 
+/* Core bounded append. Appends min(strlen(source), n) bytes of source onto
+   dest. sizeof_dest is dest's total capacity (NUL included); sizeof_source is
+   source's capacity or (size_t)-1 if unknown. Aborts if the result (existing
+   dest length + appended bytes + NUL) would not fit sizeof_dest: this NEVER
+   truncates. Always NUL-terminates on success. */
 static HTS_INLINE HTS_UNUSED char* strncat_safe_(char *const dest, const size_t sizeof_dest,
                                                  const char *const source, const size_t sizeof_source, 
                                                  const size_t n,
@@ -288,6 +334,9 @@ static HTS_INLINE HTS_UNUSED char* strncat_safe_(char *const dest, const size_t
   return dest;
 }
 
+/* Core bounded copy: empties dest then appends all of source via
+   strncat_safe_. sizeof_dest is dest's total capacity (NUL included). Aborts
+   (no truncation) if source plus its NUL would not fit. */
 static HTS_INLINE HTS_UNUSED char* strcpy_safe_(char *const dest, const size_t sizeof_dest,
                                                 const char *const source, const size_t sizeof_source, 
                                                 const char *exp, const char *file, int line) {
@@ -333,9 +382,11 @@ static HTS_INLINE HTS_UNUSED htsbuff htsbuff_ptr_(char *buf, size_t cap) {
  * On other compilers there is no such guard, so pass only true arrays there.
  */
 #if (defined(__GNUC__) && !defined(__cplusplus))
+
 /* 0 for an array, a -1 array-size compile error for a pointer. */
 #define htsbuff_must_be_array_(A) \
   (sizeof(char[1 - 2 * !!__builtin_types_compatible_p(typeof(A), typeof(&(A)[0]))]) - 1)
+
 #define htsbuff_array(ARR) htsbuff_ptr_((ARR), sizeof(ARR) + htsbuff_must_be_array_(ARR))
 #else
 #define htsbuff_array(ARR) htsbuff_ptr_((ARR), sizeof(ARR))
@@ -378,11 +429,20 @@ static HTS_INLINE HTS_UNUSED const char *htsbuff_str(const htsbuff *b) {
   return b->buf;
 }
 
+/* Thin aliases over the libc allocator/memcpy (historical "t" suffix); no
+   added bounds checking. freet() also NULLs the freed pointer and tolerates
+   NULL. memcpybuff() despite the name is a raw memcpy: the caller owns the
+   bounds. */
 #define malloct(A)          malloc(A)
+
 #define calloct(A,B)        calloc((A), (B))
+
 #define freet(A)            do { if ((A) != NULL) { free(A); (A) = NULL; } } while(0)
+
 #define strdupt(A)          strdup(A)
+
 #define realloct(A,B)       realloc(A, B)
+
 #define memcpybuff(A, B, N) memcpy((A), (B), (N))
 
 #endif

src/htsstrings.h

@@ -42,7 +42,9 @@ Please visit our Website: http://www.httrack.com
 #ifndef HTS_UNUSED
 #ifdef __GNUC__
 #define HTS_UNUSED __attribute__ ((unused))
+
 #define HTS_STATIC static __attribute__ ((unused))
+
 #define HTS_PRINTF_FUN(fmt, arg) __attribute__ ((format (printf, fmt, arg)))
 #else
 #define HTS_UNUSED
@@ -58,6 +60,23 @@ typedef struct String String;
 #endif
 #ifndef HTS_DEF_STRUCT_String
 #define HTS_DEF_STRUCT_String
+/**
+ * Growable owned string.
+ *
+ * Ownership/lifetime: the String owns buffer_ and frees it (StringFree).
+ * buffer_ is allocated lazily, so a freshly STRING_EMPTY/StringInit'd String,
+ * or one just StringFree'd/StringAcquire'd, has buffer_ == NULL and
+ * length_ == capacity_ == 0. Any growing operation may realloc, so a pointer
+ * obtained from StringBuff/StringBuffRW is invalidated by the next append,
+ * copy, or room request; do not cache it across such calls.
+ *
+ * Invariants when buffer_ != NULL: length_ < capacity_, and buffer_[length_]
+ * is a NUL (the content is always NUL-terminated). length_ excludes that NUL;
+ * capacity_ counts it. The empty state (buffer_ == NULL) has no readable NUL,
+ * so callers must not treat StringBuff() of an untouched String as "".
+ *
+ * Direct field access is internal (trailing underscore); use the macros below.
+ */
 struct String {
   char *buffer_;
   size_t length_;
@@ -68,6 +87,7 @@ struct String {
 /** Allocator **/
 #ifndef STRING_REALLOC
 #define STRING_REALLOC(BUFF, SIZE) ( (char*) realloc(BUFF, SIZE) )
+
 #define STRING_FREE(BUFF) free(BUFF)
 #endif
 #ifndef STRING_ASSERT
@@ -75,45 +95,49 @@ struct String {
 #define STRING_ASSERT(EXP) assert(EXP)
 #endif
 
-/** An empty string **/
+/** Initializer for an empty String (NULL buffer). Use to declare or reset. **/
 #define STRING_EMPTY { (char*) NULL, 0, 0 }
 
-/** String buffer **/
+/** Read-only buffer pointer. NULL until the String has been written to.
+    Invalidated by any subsequent growing operation. **/
 #define StringBuff(BLK) ( (const char*) ((BLK).buffer_) )
 
-/** String buffer (read/write) **/
+/** Read/write buffer pointer. Same NULL/invalidation rules as StringBuff. **/
 #define StringBuffRW(BLK) ((BLK).buffer_)
 
-/** String length **/
+/** Current length in bytes, excluding the terminating NUL. **/
 #define StringLength(BLK) ((BLK).length_)
 
-/** String not empty ? **/
+/** Non-zero if the String holds at least one byte. **/
 #define StringNotEmpty(BLK) ( StringLength(BLK) > 0 )
 
-/** String capacity **/
+/** Allocated capacity in bytes, including room for the terminating NUL. **/
 #define StringCapacity(BLK) ((BLK).capacity_)
 
-/** Subcharacter **/
+/** Byte at POS (read). No bounds check; POS must be < StringLength. **/
 #define StringSub(BLK, POS) ( StringBuff(BLK)[POS] )
 
-/** Subcharacter (read/write) **/
+/** Byte at POS (read/write). No bounds check; POS must be < StringLength. **/
 #define StringSubRW(BLK, POS) ( StringBuffRW(BLK)[POS] )
 
 /** Subcharacter (read/write) **/
 #define StringSubRW(BLK, POS) ( StringBuffRW(BLK)[POS] )
 
-/** Right subcharacter **/
+/** Byte POS positions from the end (read). POS==1 is the last byte. **/
 #define StringRight(BLK, POS) ( StringBuff(BLK)[StringLength(BLK) - POS] )
 
-/** Right subcharacter (read/write) **/
+/** Byte POS positions from the end (read/write). POS==1 is the last byte. **/
 #define StringRightRW(BLK, POS) ( StringBuffRW(BLK)[StringLength(BLK) - POS] )
 
-/** Remove the utter right character from the string. **/
+/** Drop the last byte and re-terminate. Undefined if the String is empty
+    (no length check; would underflow). **/
 #define StringPopRight(BLK) do { \
   StringBuffRW(BLK)[--StringLength(BLK)] = '\0'; \
 } while(0)
 
-/** Ensure the string is large enough for exactly CAPACITY bytes overall (including \0). **/
+/** Grow so capacity_ >= CAPACITY (total bytes, including the NUL). May realloc
+    (invalidating prior buffer pointers); aborts via STRING_ASSERT on OOM.
+    Never shrinks. **/
 #define StringRoomTotal(BLK, CAPACITY) do { \
   const size_t capacity_ = (size_t) (CAPACITY); \
   while ((BLK).capacity_ < capacity_) { \
@@ -127,31 +151,37 @@ struct String {
   } \
 } while(0)
 
-/** Ensure the string is large enough for exactly SIZE more characters (not including \0). **/
+/** Reserve room for SIZE more bytes beyond the current length (plus the NUL).
+    May realloc, invalidating prior buffer pointers. **/
 #define StringRoom(BLK, SIZE) StringRoomTotal(BLK, StringLength(BLK) + (SIZE) + 1)
 
-/** Return the RW buffer for a strcat() operation of at most SIZE characters. **/
+/** Reserve room for SIZE more bytes and return the (post-realloc) RW buffer,
+    for appending in place. Does not update length_; the caller must. **/
 #define StringBuffN(BLK, SIZE) StringBuffN_(&(BLK), SIZE)
 HTS_STATIC char *StringBuffN_(String * blk, int size) {
   StringRoom(*blk, size);
   return StringBuffRW(*blk);
 }
 
-/** Initialize a string. **/
+/** Zero the fields (NULL buffer, no allocation). Use on an uninitialized
+    String only; does NOT free an existing buffer (use StringFree to reset
+    an owned one), so calling it on a live String leaks. **/
 #define StringInit(BLK) do { \
   (BLK).buffer_ = NULL; \
   (BLK).capacity_ = 0; \
   (BLK).length_ = 0; \
 } while(0)
 
-/** Clear a string (set its length to 0) **/
+/** Truncate to length 0, keeping the allocation. Forces a non-NULL buffer
+    (allocates if empty) and writes the leading NUL, so StringBuff is "". **/
 #define StringClear(BLK) do { \
   (BLK).length_ = 0; \
   StringRoom(BLK, 0); \
   (BLK).buffer_[0] = '\0'; \
 } while(0)
 
-/** Set the length of a string to 'SIZE'. If SIZE is negative, check the size using strlen(). **/
+/** Set length_ to SIZE, or to strlen(buffer_) if SIZE is negative. Caller
+    asserts SIZE fits the existing content; does not (re)allocate. **/
 #define StringSetLength(BLK, SIZE) do { \
   if (SIZE >= 0) { \
     (BLK).length_ = SIZE; \
@@ -160,7 +190,8 @@ HTS_STATIC char *StringBuffN_(String * blk, int size) {
   } \
 } while(0)
 
-/** Free a string (release memory) **/
+/** Release the owned buffer and reset to the empty state (NULL buffer).
+    Idempotent; safe on an already-empty String. **/
 #define StringFree(BLK) do { \
   if ((BLK).buffer_ != NULL) { \
     STRING_FREE((BLK).buffer_); \
@@ -170,8 +201,12 @@ HTS_STATIC char *StringBuffN_(String * blk, int size) {
   (BLK).length_ = 0; \
 } while(0)
 
-/** Assign an allocated pointer to a a string.
-The pointer _MUST_ be compatible with STRING_REALLOC() and STRING_FREE() **/
+/** Take ownership of a NUL-terminated heap string STR (the String will free
+    it). Frees any current buffer first. STR MUST have been allocated by an
+    allocator compatible with STRING_REALLOC()/STRING_FREE(), and must not be
+    freed or used by the caller afterwards. length_/capacity_ are set to
+    strlen(STR) (capacity_ here excludes the NUL, so the next append reallocs).
+   **/
 #define StringSetBuffer(BLK, STR) do { \
   size_t len__ = strlen( STR ); \
   StringFree(BLK); \
@@ -180,7 +215,9 @@ The pointer _MUST_ be compatible with STRING_REALLOC() and STRING_FREE() **/
   (BLK).length_ = len__; \
 } while(0)
 
-/** Append a memory block to a string **/
+/** Append SIZE raw bytes from STR (NULs allowed as data). Grows as needed and
+    re-terminates with a NUL after the appended bytes. STR must not alias
+    BLK's buffer (a realloc would invalidate it). **/
 #define StringMemcat(BLK, STR, SIZE) do { \
   const char* str_mc_ = (STR); \
   const size_t size_mc_ = (size_t) (SIZE); \
@@ -192,13 +229,14 @@ The pointer _MUST_ be compatible with STRING_REALLOC() and STRING_FREE() **/
   *((BLK).buffer_ + (BLK).length_) = '\0'; \
 } while(0)
 
-/** Copy a memory block to a string **/
+/** Replace content with SIZE raw bytes from STR (NULs allowed as data).
+    Same non-aliasing requirement as StringMemcat. **/
 #define StringMemcpy(BLK, STR, SIZE) do { \
   (BLK).length_ = 0; \
   StringMemcat(BLK, STR, SIZE); \
 } while(0)
 
-/** Add a character **/
+/** Append one byte and re-terminate. Grows as needed. **/
 #define StringAddchar(BLK, c) do { \
   String * const s__ = &(BLK); \
   char c__ = (c); \
@@ -207,7 +245,9 @@ The pointer _MUST_ be compatible with STRING_REALLOC() and STRING_FREE() **/
   StringBuffRW(*s__)[StringLength(*s__)  ] = 0; \
 } while(0)
 
-/** Acquire a string ; it's the client's responsability to free() it **/
+/** Hand the buffer to the caller and reset the String to empty (NULL buffer).
+    The returned pointer is now owned by the caller, who must STRING_FREE() it.
+    Returns NULL if the String was empty. **/
 HTS_STATIC char *StringAcquire(String * blk) {
   char *buff = StringBuffRW(*blk);
 
@@ -217,7 +257,8 @@ HTS_STATIC char *StringAcquire(String * blk) {
   return buff;
 }
 
-/** Clone a string. **/
+/** Return an independent deep copy of *src (its own allocation). The caller
+    owns the result and must StringFree it. **/
 HTS_STATIC String StringDup(const String * src) {
   String s = STRING_EMPTY;
 
@@ -225,7 +266,10 @@ HTS_STATIC String StringDup(const String * src) {
   return s;
 }
 
-/** Attach a string using a pointer. **/
+/** Take ownership of *str (a NUL-terminated heap string) and NULL it out, so
+    ownership transfers and the caller keeps no dangling alias. Frees any
+    current buffer first. *str MUST be allocator-compatible (see
+    StringSetBuffer). No-op if str or *str is NULL. **/
 HTS_STATIC void StringAttach(String * blk, char **str) {
   StringFree(*blk);
   if (str != NULL && *str != NULL) {
@@ -235,7 +279,8 @@ HTS_STATIC void StringAttach(String * blk, char **str) {
   }
 }
 
-/** Append a string to another one. **/
+/** Append the C string STR (up to its NUL). No-op if STR is NULL. STR must not
+    alias BLK's buffer. **/
 #define StringCat(BLK, STR) do { \
   const char *const str__ = ( STR ); \
   if (str__ != NULL) { \
@@ -244,6 +289,8 @@ HTS_STATIC void StringAttach(String * blk, char **str) {
   } \
 } while(0)
 
+/** Append at most SIZE leading bytes of the C string STR. No-op if STR is
+    NULL. STR must not alias BLK's buffer. **/
 #define StringCatN(BLK, STR, SIZE) do { \
   const char *str__ = ( STR ); \
   if (str__ != NULL) { \
@@ -255,6 +302,8 @@ HTS_STATIC void StringAttach(String * blk, char **str) {
   } \
 } while(0)
 
+/** Replace content with at most SIZE leading bytes of the C string STR.
+    If STR is NULL, clears to "". STR must not alias BLK's buffer. **/
 #define StringCopyN(BLK, STR, SIZE) do { \
   const char *str__ = ( STR ); \
   const size_t usize__ = (SIZE); \
@@ -270,9 +319,13 @@ HTS_STATIC void StringAttach(String * blk, char **str) {
   } \
 } while(0)
 
+/** Replace blk's content with a copy of String blk2. blk and blk2 must be
+    distinct Strings (use StringCopyOverlapped if they may be the same). **/
 #define StringCopyS(blk, blk2) StringCopyN(blk, (blk2).buffer_, (blk2).length_)
 
-/** Copy a string to another one. **/
+/** Replace content with a copy of the C string STR. If STR is NULL, clears to
+    "". STR must not alias BLK's buffer (use StringCopyOverlapped if it might).
+   **/
 #define StringCopy(BLK, STR) do { \
   const char *str__ = ( STR ); \
   if (str__ != NULL) { \
@@ -283,7 +336,8 @@ HTS_STATIC void StringAttach(String * blk, char **str) {
   } \
 } while(0)
 
-/** Copy a (potentially overlapping) string to another one. **/
+/** Like StringCopy but safe when STR aliases BLK's own buffer: copies via a
+    temporary, so a self-copy or overlap is well-defined. **/
 #define StringCopyOverlapped(BLK, STR) do { \
   String s__ = STRING_EMPTY; \
   StringCopy(s__, STR); \

src/htswrap.h

@@ -31,6 +31,12 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/** @file htswrap.h
+    Legacy entry points of the callback-wrapper subsystem. The live callback
+    registration API now lives on the httrackp options block (hts_set_callback);
+    only the no-op init/free stubs remain exported here for ABI compatibility.
+ */
+
 #ifndef HTSWRAP_DEFH
 #define HTSWRAP_DEFH
 
@@ -50,7 +56,10 @@ typedef struct httrackp httrackp;
 extern "C" {
 #endif
 
+/** Legacy no-op retained for ABI compatibility; always returns 1. */
 HTSEXT_API int htswrap_init(void);      // LEGACY
+
+/** Legacy no-op retained for ABI compatibility; always returns 1. */
 HTSEXT_API int htswrap_free(void);      // LEGACY
 
 #ifdef __cplusplus

src/httrack-library.h

@@ -30,6 +30,25 @@ Please visit our Website: http://www.httrack.com
 /* Author: Xavier Roche                                         */
 /* ------------------------------------------------------------ */
 
+/**
+ * @file httrack-library.h
+ * @brief Public C API for embedding the HTTrack mirroring engine.
+ *
+ * Two ways to drive the engine, both supported and used by real consumers:
+ *  - argv path: build an argv vector and call hts_main()/hts_main2(), exactly
+ *    as the command-line tool is configured.
+ *  - struct/callback path: hts_create_opt(), install callbacks with
+ *    CHAIN_FUNCTION(), then hts_main2(), then hts_free_opt().
+ *
+ * Typical lifecycle: hts_init() once per process, then per mirror
+ * hts_create_opt() -> CHAIN_FUNCTION() -> hts_main2() (blocking) ->
+ * hts_get_stats()/hts_errmsg() -> hts_free_opt().
+ *
+ * Threading: hts_main2() blocks the calling thread. hts_request_stop() and
+ * hts_has_stopped() are safe to call for the same opt from another thread while
+ * the mirror runs. hts_free_opt() must not run until hts_has_stopped() is true.
+ */
+
 #ifndef HTTRACK_DEFLIB
 #define HTTRACK_DEFLIB
 
@@ -54,15 +73,18 @@ typedef struct strc_int2bytes2 strc_int2bytes2;
 #endif
 #ifndef HTS_DEF_DEFSTRUCT_hts_log_type
 #define HTS_DEF_DEFSTRUCT_hts_log_type
+/** Log severity levels, most to least severe. A message is emitted only if its
+    level is <= opt->debug. LOG_ERRNO is a flag OR'd into the level to append
+    ": <strerror(errno)>" to the message. */
 typedef enum hts_log_type {
-  LOG_PANIC,
-  LOG_ERROR,
-  LOG_WARNING,
-  LOG_NOTICE,
-  LOG_INFO,
-  LOG_DEBUG,
-  LOG_TRACE,
-  LOG_ERRNO = 1 << 8
+  LOG_PANIC,         /**< Fatal condition. */
+  LOG_ERROR,         /**< Error. */
+  LOG_WARNING,       /**< Warning. */
+  LOG_NOTICE,        /**< Notice; the default opt->debug level. */
+  LOG_INFO,          /**< Informational. */
+  LOG_DEBUG,         /**< Debug detail. */
+  LOG_TRACE,         /**< Most verbose tracing. */
+  LOG_ERRNO = 1 << 8 /**< Flag: append strerror(errno) to the message. */
 } hts_log_type;
 #endif
 #ifndef HTS_DEF_FWSTRUCT_hts_stat_struct
@@ -70,7 +92,9 @@ typedef enum hts_log_type {
 typedef struct hts_stat_struct hts_stat_struct;
 #endif
 
-/** Assert error callback. **/
+/** Assertion/error handler. Receives the failed expression text, source file,
+    and line. The strings are valid only for the duration of the call; do not
+    retain them. */
 #ifndef HTS_DEF_FWSTRUCT_htsErrorCallback
 #define HTS_DEF_FWSTRUCT_htsErrorCallback
 typedef void (*htsErrorCallback) (const char *msg, const char *file, int line);
@@ -79,10 +103,14 @@ typedef void (*htsErrorCallback) (const char *msg, const char *file, int line);
 /* Helpers for plugging callbacks
 requires: htsdefines.h */
 
-/*
-Add a function callback 'FUNCTION' to the option structure 'OPT' callback member 'MEMBER', 
-with an optional (may be NULL) argument 'ARGUMENT'
-*/
+/**
+ * Install callback FUNCTION into OPT->callbacks_fun->MEMBER, chaining it ahead
+ * of any callback already there (whose function and carg are saved for
+ * CALLBACKARG_PREV_FUN/CALLBACKARG_PREV_CARG). ARGUMENT is an optional (may be
+ * NULL) user pointer, later read inside the callback with
+ * CALLBACKARG_USERDEF(). Allocates a t_hts_callbackarg with hts_malloc (not
+ * checked for OOM); it is freed by hts_free_opt().
+ */
 #define CHAIN_FUNCTION(OPT, MEMBER, FUNCTION, ARGUMENT) do { \
   t_hts_callbackarg *carg = (t_hts_callbackarg*) hts_malloc(sizeof(t_hts_callbackarg)); \
   carg->userdef = ( ARGUMENT ); \
@@ -95,180 +123,529 @@ with an optional (may be NULL) argument 'ARGUMENT'
 /* The following helpers are useful only if you know that an existing callback migh be existing before before the call to CHAIN_FUNCTION()
 If your functions were added just after hts_create_opt(), no need to make the previous function check */
 
-/* Get the user-defined pointer initially passed to CHAIN_FUNCTION(), given the callback's carg argument */
+/** Inside a chained callback, return the ARGUMENT pointer originally passed to
+    CHAIN_FUNCTION(), or NULL when CARG is NULL. */
 #define CALLBACKARG_USERDEF(CARG) ( ( (CARG) != NULL ) ? (CARG)->userdef : NULL )
 
-/* Get the previously existing function before the call to CHAIN_FUNCTION(), given the callback's carg argument */
+/** Return the callback of type NAME that this one chained over, cast to its
+    function-pointer type, or NULL. Call it to forward to the prior handler. */
 #define CALLBACKARG_PREV_FUN(CARG, NAME) ( (t_hts_htmlcheck_ ##NAME) ( ( (CARG) != NULL ) ? (CARG)->prev.fun : NULL ) )
 
-/* Get the previously existing function argument before the call to CHAIN_FUNCTION(), given the callback's carg argument */
+/** Return the carg of the callback this one chained over (pass it when
+   forwarding to the CALLBACKARG_PREV_FUN result), or NULL. */
 #define CALLBACKARG_PREV_CARG(CARG) ( ( (CARG) != NULL ) ? (CARG)->prev.carg : NULL )
 
 /* Functions */
 
 /* Initialization */
+/** Initialize the engine (lazy, idempotent, process-global): threading, the
+    hashtable assert handler, modules, the MD5 self-test, and TLS when built
+   with it. Only the first call does work. Honors $HTS_LOG for the debug level.
+    Always returns 1. Call before hts_create_opt() or hts_main(). */
 HTSEXT_API int hts_init(void);
+
+/** No-op kept for API compatibility. Frees nothing (the process-global mutexes
+    set up by hts_init() are never released) and always returns 1. */
 HTSEXT_API int hts_uninit(void);
+
+/** Block until all background mirror threads have finished. No-op unless built
+    with threaded fetching. */
 HTSEXT_API void htsthread_wait(void);
 
 /* Main functions */
+/** Run a full mirror from a command-line argv (argv[0] is ignored, as in
+   main()). Creates a fresh option set, runs the engine, and frees it. Returns
+   the engine exit code. Call hts_init() first. */
 HTSEXT_API int hts_main(int argc, char **argv);
+
+/** Run a full mirror using a caller-supplied option set. Use this instead of
+    hts_main() to set options or plug callbacks on opt first. Blocks until the
+    mirror ends and returns the engine exit code. The caller keeps ownership of
+    opt and must release it with hts_free_opt(). */
 HTSEXT_API int hts_main2(int argc, char **argv, httrackp * opt);
 
 /* Options handling */
+/** Allocate and default-initialize an option set, preloading the bundled parser
+    modules. Returns a heap object the caller owns and must release with
+    hts_free_opt(). Does not return NULL on allocation failure. */
 HTSEXT_API httrackp *hts_create_opt(void);
+
+/** Free an option set created by hts_create_opt() (callback chains, plugged
+    modules, DNS cache, owned strings, and the structure). NULL is accepted. The
+    pointer is invalid afterward. Do not call while a mirror is running on that
+    opt; wait until hts_has_stopped() is true. */
 HTSEXT_API void hts_free_opt(httrackp * opt);
+
+/** Return sizeof(httrackp) as the library sees it, for caller-vs-library struct
+    ABI mismatch checks. */
 HTSEXT_API size_t hts_sizeof_opt(void);
+
+/** Snapshot opt's error/warning/info counters and return a pointer to them.
+    Returns NULL if opt is NULL. The result aliases a single process-global
+    static: it is not thread-safe and is overwritten by the next call, so copy
+    out the fields you need. */
 HTSEXT_API const hts_stat_struct* hts_get_stats(httrackp * opt);
+
+/** Legacy no-op retained for API compatibility. */
 HTSEXT_API void set_wrappers(httrackp * opt);   /* LEGACY */
+
+/** Load a plugin shared library and run its hts_plug(opt, argv) entry point. On
+    success the handle is recorded in opt and unloaded by hts_free_opt().
+    @return 1 if loaded and hts_plug succeeded; 0 if loaded but hts_plug was
+    missing or refused; -1 if the library could not be loaded. */
 HTSEXT_API int plug_wrapper(httrackp * opt, const char *moduleName,
                             const char *argv);
+
+/** Install the process-global assertion/error callback (NULL clears it). Not
+    per-opt, and not safe to change while a mirror runs. */
 HTSEXT_API void hts_set_error_callback(htsErrorCallback handler);
+
+/** Return the current process-global error callback, or NULL. */
 HTSEXT_API htsErrorCallback hts_get_error_callback(void);
 
 /* Logging */
+/** Legacy: write prefix then msg to opt->log. Returns 0 if written, 1 if
+    opt->log is NULL. Prefer hts_log_print(). */
 HTSEXT_API int hts_log(httrackp * opt, const char *prefix, const char *msg);
+
+/** printf-style log at level @p type (an hts_log_type, optionally |LOG_ERRNO).
+    Forwards to the registered log callback, and when the level is <= opt->debug
+    also to opt->log. @p format must be non-NULL. */
 HTSEXT_API void hts_log_print(httrackp * opt, int type, const char *format,
                               ...) HTS_PRINTF_FUN(3, 4);
+
+/** va_list form of hts_log_print(). @p opt may be NULL (only the callback
+   runs). Preserves errno. @p format must be non-NULL. */
 HTSEXT_API void hts_log_vprint(httrackp * opt, int type, const char *format,
                                va_list args);
-HTSEXT_API void hts_set_log_vprint_callback(void (*callback)(httrackp * opt, 
-                                           int type, 
-                                           const char *format, va_list args));
+
+/** Install the process-global log callback invoked by hts_log_vprint() for
+   every message, regardless of opt->debug (NULL clears it). Not per-opt. */
+HTSEXT_API void
+hts_set_log_vprint_callback(void (*callback)(httrackp *opt, int type,
+                                             const char *format, va_list args));
 
 /* Infos */
+/** Human-readable build/feature string plus the names of plugged modules. The
+    result is written into and aliases a 2048-byte scratch buffer inside opt: it
+    is valid until that buffer is next used, and must not be freed. opt must be
+    non-NULL. */
 HTSEXT_API const char *hts_get_version_info(httrackp * opt);
+
+/** Static build-features string (TLS, zlib, ipv6, and so on). Process-global
+    storage; do not free or modify. */
 HTSEXT_API const char *hts_is_available(void);
-HTSEXT_API const char* hts_version(void);
-HTSEXT_API const hts_stat_struct* hts_get_stats(httrackp * opt);
+
+/** HTTrack version id string. Static storage; do not free. */
+HTSEXT_API const char *hts_version(void);
 
 /* Wrapper functions */
 HTSEXT_API int htswrap_init(void);      // DEPRECATED - DUMMY FUNCTION
+
 HTSEXT_API int htswrap_free(void);      // DEPRECATED - DUMMY FUNCTION
+
+/** Register callback @p fct under @p name in opt's callback table (for example
+    "start", "check-html", "linkdetected"). Returns 1 on success, 0 if @p name
+   is not a known slot. Prefer CHAIN_FUNCTION(), which preserves any prior
+   callback. */
 HTSEXT_API int htswrap_add(httrackp * opt, const char *name, void *fct);
+
+/** Return the function pointer registered under @p name in opt as a uintptr_t,
+   or 0 if none or unknown. */
 HTSEXT_API uintptr_t htswrap_read(httrackp * opt, const char *name);
-HTSEXT_API int htswrap_set_userdef(httrackp * opt, void *userdef);
-HTSEXT_API void *htswrap_get_userdef(httrackp * opt);
 
 /* Internal library allocators, if a different libc is being used by the client */
+/** strdup() through the library allocator. Returns a heap copy freed with
+    hts_free(), or NULL on failure. */
 HTSEXT_API char *hts_strdup(const char *string);
+
+/** malloc() through the library allocator. Free with hts_free(). NULL on OOM.
+ */
 HTSEXT_API void *hts_malloc(size_t size);
+
+/** realloc() through the library allocator. NULL on failure, leaving the
+   original block unchanged. */
 HTSEXT_API void *hts_realloc(void *const data, const size_t size);
+
+/** free() through the library allocator. NULL is accepted. */
 HTSEXT_API void hts_free(void *data);
 
 /* Other functions */
 HTSEXT_API int hts_resetvar(void);      // DEPRECATED - DUMMY FUNCTION
+
+/** (Re)build the top-level index.html aggregating every mirror project found
+    under @p path. @p binpath is the data root used to locate the
+    templates/topindex-*.html files, falling back to built-in templates. Writes
+    <path>/index.html. @return 1 on success, 0 on failure. */
 HTSEXT_API int hts_buildtopindex(httrackp * opt, const char *path,
                                  const char *binpath);
+
+/** Scan every mirror project under @p path and return a CRLF-separated list:
+    @p type==1 gives the distinct category names, any other value gives the
+    project directory names. The result is heap-allocated and owned by the
+   caller (free with freet()); it may be NULL. Not UTF-8. @p path is modified in
+   place (a trailing '/' is stripped). */
 HTSEXT_API char *hts_getcategories(char *path, int type);
+
+/** Read the `category=` value from a winprofile.ini file. The result is
+    heap-allocated and owned by the caller (free with freet()), or NULL when the
+    file is missing or has no category line. Not UTF-8. */
 HTSEXT_API char *hts_getcategory(const char *filename);
 
 /* Catch-URL */
+/** Open a local capture socket (a mini-proxy), trying a list of standard ports
+    until one binds. Writes the chosen port to *port_prox and the local host
+    address into adr_prox (a caller buffer of at least 128 bytes), and returns
+    the listening socket. Returns INVALID_SOCKET if no port could be bound. */
 HTSEXT_API T_SOC catch_url_init_std(int *port_prox, char *adr_prox);
+
+/** Open a local capture socket bound to *port (0 picks a free port). Writes the
+    effective port back to *port and the local dotted address into @p adr (a
+    caller buffer of at least 128 bytes), and returns the listening socket.
+    Returns INVALID_SOCKET on failure. */
 HTSEXT_API T_SOC catch_url_init(int *port, char *adr);
+
+/** Block on capture socket @p soc, accept one browser connection, and capture
+    the proxied HTTP request: write the absolute URL to @p url, the upper-cased
+    method to @p method, and the rebuilt request (request line, headers, and any
+    POST body) to @p data, then send a canned response and close.
+    @return 1 on success, 0 on error; on error @p url instead holds the peer's
+    "ip:port". The buffers are caller-allocated and not bounds-checked: @p data
+    must be CATCH_URL_DATA_SIZE bytes, and @p url / @p method must fit the
+    captured request line. */
 HTSEXT_API int catch_url(T_SOC soc, char *url, char *method, char *data);
 
 /* State */
+/** Whether the engine is parsing HTML. Returns 0 if not, otherwise the percent
+    done (at least 1). @p flag >= 0 also requests a progress refresh; pass a
+    negative value to query without side effects. */
 HTSEXT_API int hts_is_parsing(httrackp * opt, int flag);
+
+/** Current background phase: 0 none, 1 testing links, 2 purge, 3, 4 scheduling,
+    5 waiting for a slot. */
 HTSEXT_API int hts_is_testing(httrackp * opt);
+
+/** Nonzero once the engine has begun its exit sequence. */
 HTSEXT_API int hts_is_exiting(httrackp * opt);
 
 /*HTSEXT_API int hts_setopt(httrackp* opt); DEPRECATED ; see copy_htsopt() */
 
+/** Queue extra start URLs to inject into a running mirror. @p url is a
+    caller-owned, NULL-terminated array of strings; the engine stores the
+   pointer without copying, so the array and its strings must stay valid until
+   the engine consumes them. @return nonzero if a list is now set. */
 HTSEXT_API int hts_addurl(httrackp * opt, char **url);
+
+/** Clear any pending add-URL list set by hts_addurl(). Always returns 0. */
 HTSEXT_API int hts_resetaddurl(httrackp * opt);
+
+/** Apply the runtime-tunable options from @p from onto @p to, to adjust a live
+    mirror. Only fields set to a non-sentinel value are copied; the rest of @p
+   to is left untouched. The user-agent string is deep-copied. @return 0. */
 HTSEXT_API int copy_htsopt(const httrackp * from, httrackp * to);
+
+/** Return the engine's last error message, or NULL. The string is owned by
+    @p opt; do not free it, and use it only while @p opt lives. */
 HTSEXT_API char *hts_errmsg(httrackp * opt);
+
+/** Get or set the transfer-pause flag. @p p >= 0 sets it (nonzero means
+   paused); a negative value queries. @return the current pause flag. */
 HTSEXT_API int hts_setpause(httrackp * opt, int);
+
+/** Ask the running mirror to terminate (sets the stop flag under the state
+   lock, so it is safe to call from another thread). @p force is currently
+   ignored.
+    @return 0; no-op if @p opt is NULL. */
 HTSEXT_API int hts_request_stop(httrackp * opt, int force);
+
+/** Queue a single in-progress file, by URL, to be cancelled by the engine.
+    @p url is copied internally. Takes the state lock, so it is thread-safe.
+    @return the underlying push result. */
 HTSEXT_API int hts_cancel_file_push(httrackp * opt, const char *url);
+
+/** Cancel the in-progress link-testing phase. Effective only while a test runs.
+ */
 HTSEXT_API void hts_cancel_test(httrackp * opt);
+
+/** Cancel the in-progress HTML parsing. Effective only while parsing is active.
+ */
 HTSEXT_API void hts_cancel_parsing(httrackp * opt);
-HTSEXT_API void hts_cancel_test(httrackp * opt);
-HTSEXT_API void hts_cancel_parsing(httrackp * opt);
+
+/** Nonzero once the mirror has fully ended. Read under the engine state lock,
+   so safe to poll from another thread. Wait for this before hts_free_opt(). */
 HTSEXT_API int hts_has_stopped(httrackp * opt);
 
 /* Tools */
+/** Ensure the directory chain leading to @p path exists, creating missing
+    directories. @p path ends either with '/' (a directory) or a filename (its
+    basename is ignored). A regular file blocking a needed directory is renamed
+    to "<name>.txt". @p path is NOT UTF-8. @return 0 on success or if it already
+    exists, -1 on error. */
 HTSEXT_API int structcheck(const char *path);
+
+/** Like structcheck() but @p path is UTF-8. @return 0 on success, -1 on error.
+ */
 HTSEXT_API int structcheck_utf8(const char *path);
+
+/** Whether the directory containing @p path exists. The basename is stripped
+    first, so passing a file path tests its parent directory. @return 1 if it is
+    a directory, 0 otherwise. */
 HTSEXT_API int dir_exists(const char *path);
+
+/** Write the HTTP reason phrase for @p statuscode into @p msg, a caller buffer
+   of at least 64 bytes. For an unknown code a non-empty @p msg is kept,
+   otherwise it is set to "Unknown error". */
 HTSEXT_API void infostatuscode(char *msg, int statuscode);
+
+/** Return the static reason-phrase string for @p statuscode, or NULL if
+   unknown. The pointer is a string literal; do not free it. */
 HTSEXT_API const char *infostatuscode_const(int statuscode);
+
+/** Current wall-clock time in milliseconds since the Unix epoch. */
 HTSEXT_API TStamp mtime_local(void);
+
+/** Format a duration @p t (in seconds) into a compact string in @p st, for
+    example "3d,02h,04min05s". @p st is caller-allocated and not bounds-checked.
+ */
 HTSEXT_API void qsec2str(char *st, TStamp t);
+
+/* The int2* helpers below write into the caller-supplied strc and return
+   pointers into it. No allocation happens; the result is valid only until strc
+   is reused, and a given strc is not reentrant. Use one strc per
+   concurrently-live result. */
+/** Format @p n as a decimal string into @p strc and return it. */
 HTSEXT_API char *int2char(strc_int2bytes2 * strc, int n);
+
+/** Format byte count @p n as "<num><unit>" (B/KiB/MiB/GiB and so on) into
+    @p strc and return it. */
 HTSEXT_API char *int2bytes(strc_int2bytes2 * strc, LLint n);
+
+/** Format a transfer rate @p n as "<num><unit>/s" into @p strc and return it.
+ */
 HTSEXT_API char *int2bytessec(strc_int2bytes2 * strc, long int n);
+
+/** Split byte count @p n into number and unit, returning a 2-element array
+    {number, unit} stored inside @p strc. */
 HTSEXT_API char **int2bytes2(strc_int2bytes2 * strc, LLint n);
+
+/** Skip any "user[:pass]@" identification prefix in a URL, returning a pointer
+    into the argument past it (or past the protocol if none). The result aliases
+    the input string. */
 HTSEXT_API char *jump_identification(char *);
+
 HTSEXT_API const char *jump_identification_const(const char *);
+
+/** Like jump_identification() and also strip a leading "www." host prefix,
+    returning a pointer into the input to the normalized host. */
 HTSEXT_API char *jump_normalized(char *);
+
 HTSEXT_API const char *jump_normalized_const(const char *);
+
+/** Return a pointer (into the input) to the ":port" part of a URL host, or NULL
+    if there is no explicit port. Handles bracketed IPv6 literals. */
 HTSEXT_API char *jump_toport(char *);
+
 HTSEXT_API const char *jump_toport_const(const char *);
+
+/** Canonicalize a URL path into @p dest: collapse duplicate '/' and sort the
+    query-string arguments, so "?b=2&a=1" and "?a=1&b=2" compare equal. Returns
+    @p dest, a caller buffer of at least strlen(source)+1 bytes (the output is
+    never longer than the input). */
 HTSEXT_API char *fil_normalized(const char *source, char *dest);
+
+/** Write the normalized host of @p source (identification and "www." stripped)
+    into @p dest, truncated to @p destsize. Returns @p dest. */
 HTSEXT_API char *adr_normalized_sized(const char *source, char *dest,
                                       size_t destsize);
+
+/** @deprecated Use adr_normalized_sized(). This form has no destination size
+   and assumes @p dest is the engine URL buffer of HTS_URLMAXSIZE*2 bytes; a
+   smaller buffer can overflow. */
 HTS_DEPRECATED("use adr_normalized_sized(source, dest, destsize)")
+
 HTSEXT_API char *adr_normalized(const char *source, char *dest);
+
+/** Get or set the process executable root directory (with trailing '/'). The
+    first call with non-NULL @p file initializes it and returns NULL; later
+    initialization calls are ignored. Call with NULL to query: returns the
+   stored directory, or "" if never set. The result is a static internal buffer;
+   do not free it, and do not set it from multiple threads. */
 HTSEXT_API const char *hts_rootdir(char *file);
 
 /* Escaping URLs */
+/*
+ * Size contract shared by the escape/unescape family below.
+ * For the escape_* / append_escape_* / inplace_escape_* /
+ * escape_for_html_print* / make_content_id / x_escape_http functions, `size` is
+ * the total capacity of `dest` including the terminating NUL. The size_t return
+ * is the number of bytes written, NOT counting the NUL; on overflow it returns
+ * `size` and `dest` is still NUL-terminated (truncated). Passing sizeof(a
+ * pointer) as the size trips a runtime assert. The unescape_http* functions
+ * instead return `dest` (the catbuff pointer) and truncate to fit `size`.
+ */
+/** Decode HTML entities in @p s in place (for example "&amp;" becomes "&"). */
 HTSEXT_API void unescape_amp(char *s);
 
+/** Percent-escape only spaces (' ' becomes "%20"); copy everything else
+ * verbatim. */
 HTSEXT_API size_t escape_spc_url(const char *const src, char *const dest, const size_t size);
+
+/** Aggressively percent-escape @p src for use as a single URL path segment
+    (reserved, delimiter, unwise, special, avoid and mark characters). */
 HTSEXT_API size_t escape_in_url(const char *const src, char *const dest, const size_t size);
+
+/** Percent-escape @p src as a URI, escaping only what is necessary and keeping
+    '/' and other reserved characters. */
 HTSEXT_API size_t escape_uri(const char *const src, char *const dest, const size_t size);
+
+/** Like escape_uri() for a UTF-8 URI: also escapes reserved characters other
+    than '/'. */
 HTSEXT_API size_t escape_uri_utf(const char *const src, char *const dest, const size_t size);
+
+/** Minimal "make safe" escape: percent-escapes only '"', ' ' and control
+    characters, leaving an already-formed URL otherwise intact. */
 HTSEXT_API size_t escape_check_url(const char *const src, char *const dest, const size_t size);
 
+/** Append-variant of escape_spc_url(): escapes @p src after the existing
+    NUL-terminated content of @p dest. Returns the bytes appended (excluding the
+    NUL). */
 HTSEXT_API size_t append_escape_spc_url(const char *const src, char *const dest, const size_t size);
+
+/** Append-variant of escape_in_url(). See append_escape_spc_url(). */
 HTSEXT_API size_t append_escape_in_url(const char *const src, char *const dest, const size_t size);
+
+/** Append-variant of escape_uri(). See append_escape_spc_url(). */
 HTSEXT_API size_t append_escape_uri(const char *const src, char *const dest, const size_t size);
+
+/** Append-variant of escape_uri_utf(). See append_escape_spc_url(). */
 HTSEXT_API size_t append_escape_uri_utf(const char *const src, char *const dest, const size_t size);
+
+/** Append-variant of escape_check_url(). See append_escape_spc_url(). */
 HTSEXT_API size_t append_escape_check_url(const char *const src, char *const dest, const size_t size);
 
+/** In-place variant of escape_spc_url(): escapes the NUL-terminated string in
+    @p dest back into @p dest. */
 HTSEXT_API size_t inplace_escape_spc_url(char *const dest, const size_t size);
+
+/** In-place variant of escape_in_url(). See inplace_escape_spc_url(). */
 HTSEXT_API size_t inplace_escape_in_url(char *const dest, const size_t size);
+
+/** In-place variant of escape_uri(). See inplace_escape_spc_url(). */
 HTSEXT_API size_t inplace_escape_uri(char *const dest, const size_t size);
+
+/** In-place variant of escape_uri_utf(). See inplace_escape_spc_url(). */
 HTSEXT_API size_t inplace_escape_uri_utf(char *const dest, const size_t size);
+
+/** In-place variant of escape_check_url(). See inplace_escape_spc_url(). */
 HTSEXT_API size_t inplace_escape_check_url(char *const dest, const size_t size);
 
+/** Same escaping as escape_check_url() but returns @p dest instead of the byte
+    count. */
 HTSEXT_API char *escape_check_url_addr(const char *const src, char *const dest, const size_t size);
+
+/** Build a MIME/MHTML content-id token in @p dest from @p adr and @p fil:
+    escape_in_url() both, then replace every '%' with 'X' so the result is one
+    opaque token. */
 HTSEXT_API size_t make_content_id(const char *const adr, const char *const fil, char *const dest, const size_t size);
 
+/** Low-level percent-escaper backing the escape_* family. @p mode selects the
+    character class to escape: 0 check_url, 1 in_url, 2 spc_url, 3 uri,
+    30 uri_utf. @p max_size is the dest capacity including the NUL. */
 HTSEXT_API size_t x_escape_http(const char *const s, char *const dest, const size_t max_size, const int mode);
+
+/** Strip all control characters (byte value < 32) from @p s in place. */
 HTSEXT_API void escape_remove_control(char *const s);
+
+/** HTML-escape for text output: rewrite '&' to "&amp;" and pass every other
+   byte through unchanged. */
 HTSEXT_API size_t escape_for_html_print(const char *const s, char *const dest, const size_t size);
+
+/** Like escape_for_html_print() but also convert every high byte (>= 128) to a
+    numeric entity "&#xNN;". */
 HTSEXT_API size_t escape_for_html_print_full(const char *const s, char *const dest, const size_t size);
 
+/** Percent-decode @p s into @p catbuff (capacity @p size) and return @p
+   catbuff. Decodes every "%xx" hex escape. */
 HTSEXT_API char *unescape_http(char *const catbuff, const size_t size, const char *const s);
-HTSEXT_API char *unescape_http_unharm(char *const catbuff, const size_t size, const char *s, const int no_high);
-HTSEXT_API char *antislash_unescaped(char *catbuff, const char *s);
 
-HTSEXT_API void escape_remove_control(char *s);
+/** Percent-decode @p s into @p catbuff, but only the escapes that are safe to
+    decode while keeping a valid URI (reserved, delimiter, unwise, control and
+    must-avoid escapes are kept encoded, and %25 is never decoded). @p no_high &
+   1 also decodes high (>= 128) bytes; @p no_high & 2 also decodes an escaped
+    space. Returns @p catbuff. */
+HTSEXT_API char *unescape_http_unharm(char *const catbuff, const size_t size, const char *s, const int no_high);
+
+/** Determine the MIME type of local file name @p fil into @p s (capacity
+    @p ssize): user --assume rules, then ".html", then the built-in extension
+    table. @p flag != 0 forces a fallback type. @return 1 if a type was written,
+    0 otherwise. */
 HTSEXT_API int get_httptype_sized(httrackp *opt, char *s, size_t ssize,
                                   const char *fil, int flag);
+
+/** @deprecated Use get_httptype_sized(). Assumes @p s has at least
+    HTS_MIMETYPE_SIZE capacity. */
 HTS_DEPRECATED("use get_httptype_sized(opt, s, ssize, fil, flag)")
+
 HTSEXT_API void get_httptype(httrackp * opt, char *s, const char *fil,
                              int flag);
+
+/** Classify @p fil by its extension: 0 unknown, 1 known non-HTML, 2 known HTML.
+    Consults the built-in table then user --assume rules. 0 for a NULL @p fil.
+ */
 HTSEXT_API int is_knowntype(httrackp * opt, const char *fil);
+
+/** Like is_knowntype() but consults only the user --assume rules: 0 no rule,
+    1 non-HTML, 2 HTML. */
 HTSEXT_API int is_userknowntype(httrackp * opt, const char *fil);
+
+/** 1 if @p fil, an extension such as "asp" or "php" (not a full filename), is a
+    known dynamic-page type, else 0. */
 HTSEXT_API int is_dyntype(const char *fil);
+
+/** Extract the extension of @p fil (text after the last '.', stopping at '?')
+    into caller scratch @p catbuff (capacity @p size) and return it. Returns ""
+    (a literal, not @p catbuff) when there is no extension or it does not fit.
+ */
 HTSEXT_API const char *get_ext(char *catbuff, size_t size, const char *fil);
+
+/** 1 if MIME type @p st must not be reclassified or renamed (hypertext types
+   and a built-in keep-list of commonly mislabeled types), else 0. */
 HTSEXT_API int may_unknown(httrackp * opt, const char *st);
+
+/** Guess the MIME type of local file @p fil into @p s (capacity @p ssize),
+    always producing a type. @return 1 if a type was written. */
 HTSEXT_API int guess_httptype_sized(httrackp *opt, char *s, size_t ssize,
                                     const char *fil);
+
+/** @deprecated Use guess_httptype_sized(). Assumes @p s has at least
+    HTS_MIMETYPE_SIZE capacity. */
 HTS_DEPRECATED("use guess_httptype_sized(opt, s, ssize, fil)")
+
 HTSEXT_API void guess_httptype(httrackp * opt, char *s, const char *fil);
 
 /* Ugly string tools */
+/* These take a caller scratch buffer catbuff of capacity size and return it. On
+   overflow they stop without writing past size and return the truncated buffer.
+   size must be a real array sizeof (the macros below check this at compile
+   time), not a pointer. */
+/** Concatenate @p a and @p b into @p catbuff (NULL or empty operands are
+ * skipped). */
 HTSEXT_API char *concat(char *catbuff, size_t size, const char *a, const char *b);
+
+/** Like concat(a, b) but convert '/' to the platform path separator (Windows).
+ */
 HTSEXT_API char *fconcat(char *catbuff, size_t size, const char *a, const char *b);
+
+/** Copy @p a into @p catbuff, converting '/' to the platform path separator
+    (Windows). */
 HTSEXT_API char *fconv(char *catbuff, size_t size, const char *a);
+
+/** Copy @p a into @p catbuff, converting every '\\' to '/' on all platforms. */
 HTSEXT_API char *fslash(char *catbuff, size_t size, const char *a);
 
 /* Debugging */
+/** Set the process-global debug verbosity (0 is off); higher levels log more to
+    stderr. Bit 0x80 redirects debug output to "hts-debug.txt". */
 HTSEXT_API void hts_debug(int level);
 
 /* Portable directory API */
@@ -276,6 +653,7 @@ HTSEXT_API void hts_debug(int level);
 #ifndef HTS_DEF_FWSTRUCT_find_handle_struct
 #define HTS_DEF_FWSTRUCT_find_handle_struct
 typedef struct find_handle_struct find_handle_struct;
+
 typedef find_handle_struct *find_handle;
 #endif
 
@@ -283,22 +661,53 @@ typedef find_handle_struct *find_handle;
 #define HTS_DEF_FWSTRUCT_topindex_chain
 typedef struct topindex_chain topindex_chain;
 #endif
+/** One node of the index/category listing built when generating the top index.
+ */
 struct topindex_chain {
-  int level;                    /* sort level */
-  char *category;               /* category */
-  char name[2048];              /* path */
-  struct topindex_chain *next;  /* next element */
+  int level;                   /**< sort level */
+  char *category;              /**< category (heap string) */
+  char name[2048];             /**< path */
+  struct topindex_chain *next; /**< next element */
 };
+
+/** Open directory @p path for iteration, positioned on the first entry. Returns
+    an opaque handle to free with hts_findclose(), or NULL on empty path or open
+    failure. */
 HTSEXT_API find_handle hts_findfirst(char *path);
+
+/** Advance to the next directory entry. Returns 1 if an entry is available, 0
+   at end of directory. */
 HTSEXT_API int hts_findnext(find_handle find);
+
+/** Close the iteration and free @p find. Always returns 0; NULL is accepted. */
 HTSEXT_API int hts_findclose(find_handle find);
+
+/** Name of the current entry, or NULL. Points into the handle's storage; valid
+    only until the next hts_findnext()/hts_findclose(). */
 HTSEXT_API char *hts_findgetname(find_handle find);
+
+/** Size in bytes of the current entry, or -1. Truncated to int, so unreliable
+    for files larger than 2 GB. */
 HTSEXT_API int hts_findgetsize(find_handle find);
+
+/** 1 if the current entry is a directory, else 0 (a system/special entry, see
+    hts_findissystem(), reports 0). */
 HTSEXT_API int hts_findisdir(find_handle find);
+
+/** 1 if the current entry is a regular file, else 0 (a system/special entry,
+   see hts_findissystem(), reports 0). */
 HTSEXT_API int hts_findisfile(find_handle find);
+
+/** 1 if the current entry is a special/system entry to skip: "." or "..", on
+    POSIX also device/fifo/socket nodes, on Windows also system, hidden or
+    temporary entries. Else 0. */
 HTSEXT_API int hts_findissystem(find_handle find);
 
 /* UTF-8 aware FILE API */
+/* On non-Windows these macros resolve directly to the POSIX calls. On Windows
+   they map to the hts_*_utf8 wrappers below, which convert the UTF-8 path to
+   UTF-16 and call the wide CRT, falling back to the narrow CRT if conversion
+   fails. Always pass UTF-8 paths through these. */
 #ifndef HTS_DEF_FILEAPI
 #ifdef _WIN32
 #define FOPEN hts_fopen_utf8
@@ -306,6 +715,7 @@ HTSEXT_API FILE *hts_fopen_utf8(const char *path, const char *mode);
 
 #define STAT hts_stat_utf8
 typedef struct _stat STRUCT_STAT;
+
 HTSEXT_API int hts_stat_utf8(const char *path, STRUCT_STAT * buf);
 
 #define UNLINK hts_unlink_utf8
@@ -315,10 +725,13 @@ HTSEXT_API int hts_unlink_utf8(const char *pathname);
 HTSEXT_API int hts_rename_utf8(const char *oldpath, const char *newpath);
 
 #define MKDIR(F) hts_mkdir_utf8(F)
+
 HTSEXT_API int hts_mkdir_utf8(const char *pathname);
 
 #define UTIME(A,B) hts_utime_utf8(A,B)
+
 typedef struct _utimbuf STRUCT_UTIMBUF;
+
 HTSEXT_API int hts_utime_utf8(const char *filename,
                               const STRUCT_UTIMBUF * times);
 #else
@@ -329,6 +742,7 @@ typedef struct stat STRUCT_STAT;
 #define UNLINK unlink
 #define RENAME rename
 #define MKDIR(F) mkdir(F, HTS_ACCESS_FOLDER)
+
 typedef struct utimbuf STRUCT_UTIMBUF;
 
 #define UTIME(A,B) utime(A,B)
@@ -336,19 +750,22 @@ typedef struct utimbuf STRUCT_UTIMBUF;
 #define HTS_DEF_FILEAPI
 #endif
 
-/** Macro aimed to break at build-time if a size is not a sizeof() strictly 
+/** Macro aimed to break at build-time if a size is not a sizeof() strictly
  *  greater than sizeof(char*). **/
 #undef COMPILE_TIME_CHECK_SIZE
 #define COMPILE_TIME_CHECK_SIZE(A) (void) ((void (*)(char[A - sizeof(char*) - 1])) NULL)
 
-/** Macro aimed to break at compile-time if a size is not a sizeof() strictly 
+/** Macro aimed to break at compile-time if a size is not a sizeof() strictly
  *  greater than sizeof(char*). **/
 #undef RUNTIME_TIME_CHECK_SIZE
 #define RUNTIME_TIME_CHECK_SIZE(A) assertf((A) != sizeof(void*))
 
 #define fconv(A,B,C) (COMPILE_TIME_CHECK_SIZE(B), fconv(A,B,C))
+
 #define concat(A,B,C,D) (COMPILE_TIME_CHECK_SIZE(B), concat(A,B,C,D))
+
 #define fconcat(A,B,C,D) (COMPILE_TIME_CHECK_SIZE(B), fconcat(A,B,C,D))
+
 #define fslash(A,B,C) (COMPILE_TIME_CHECK_SIZE(B), fslash(A,B,C))
 
 #ifdef __cplusplus

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test-driver

@@ -1,160 +0,0 @@
-#! /bin/sh
-# test-driver - basic testsuite driver script.
-
-scriptversion=2024-06-19.01; # UTC
-
-# Copyright (C) 2011-2024 Free Software Foundation, Inc.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# This file is maintained in Automake, please report
-# bugs to <bug-automake@gnu.org> or send patches to
-# <automake-patches@gnu.org>.
-
-# Make unconditional expansion of undefined variables an error.  This
-# helps a lot in preventing typo-related bugs.
-set -u
-
-usage_error ()
-{
-  echo "$0: $*" >&2
-  print_usage >&2
-  exit 2
-}
-
-print_usage ()
-{
-  cat <<END
-Usage:
-  test-driver --test-name NAME --log-file PATH --trs-file PATH
-              [--expect-failure {yes|no}] [--color-tests {yes|no}]
-              [--collect-skipped-logs {yes|no}]
-              [--enable-hard-errors {yes|no}] [--]
-              TEST-SCRIPT [TEST-SCRIPT-ARGUMENTS]
-
-The '--test-name', '--log-file' and '--trs-file' options are mandatory.
-See the GNU Automake documentation for information.
-
-Report bugs to <bug-automake@gnu.org>.
-GNU Automake home page: <https://www.gnu.org/software/automake/>.
-General help using GNU software: <https://www.gnu.org/gethelp/>.
-END
-}
-
-test_name= # Used for reporting.
-log_file=  # Where to save the output of the test script.
-trs_file=  # Where to save the metadata of the test run.
-expect_failure=no
-color_tests=no
-collect_skipped_logs=yes
-enable_hard_errors=yes
-while test $# -gt 0; do
-  case $1 in
-  --help) print_usage; exit $?;;
-  --version) echo "test-driver (GNU Automake) $scriptversion"; exit $?;;
-  --test-name) test_name=$2; shift;;
-  --log-file) log_file=$2; shift;;
-  --trs-file) trs_file=$2; shift;;
-  --color-tests) color_tests=$2; shift;;
-  --collect-skipped-logs) collect_skipped_logs=$2; shift;;
-  --expect-failure) expect_failure=$2; shift;;
-  --enable-hard-errors) enable_hard_errors=$2; shift;;
-  --) shift; break;;
-  -*) usage_error "invalid option: '$1'";;
-   *) break;;
-  esac
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-
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-test x"$log_file"  = x && missing_opts="$missing_opts --log-file"
-test x"$trs_file"  = x && missing_opts="$missing_opts --trs-file"
-if test x"$missing_opts" != x; then
-  usage_error "the following mandatory options are missing:$missing_opts"
-fi
-
-if test $# -eq 0; then
-  usage_error "missing argument"
-fi
-
-if test $color_tests = yes; then
-  # Keep this in sync with 'lib/am/check.am:$(am__tty_colors)'.
-  red='' # Red.
-  grn='' # Green.
-  lgn='' # Light green.
-  blu='' # Blue.
-  mgn='' # Magenta.
-  std=''     # No color.
-else
-  red= grn= lgn= blu= mgn= std=
-fi
-
-do_exit='rm -f $log_file $trs_file; (exit $st); exit $st'
-trap "st=129; $do_exit" 1
-trap "st=130; $do_exit" 2
-trap "st=141; $do_exit" 13
-trap "st=143; $do_exit" 15
-
-# Test script is run here. We create the file first, then append to it,
-# to ameliorate tests themselves also writing to the log file. Our tests
-# don't, but others can (automake bug#35762).
-: >"$log_file"
-"$@" >>"$log_file" 2>&1
-estatus=$?
-
-if test $enable_hard_errors = no && test $estatus -eq 99; then
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-  77:*)  col=$blu res=SKIP  recheck=no  gcopy=$collect_skipped_logs;;
-  99:*)  col=$mgn res=ERROR recheck=yes gcopy=yes;;
-  *:yes) col=$lgn res=XFAIL recheck=no  gcopy=yes;;
-  *:*)   col=$red res=FAIL  recheck=yes gcopy=yes;;
-esac
-
-# Report the test outcome and exit status in the logs, so that one can
-# know whether the test passed or failed simply by looking at the '.log'
-# file, without the need of also peaking into the corresponding '.trs'
-# file (automake bug#11814).
-echo "$res $test_name (exit status: $estatus)" >>"$log_file"
-
-# Report outcome to console.
-echo "${col}${res}${std}: $test_name"
-
-# Register the test result, and other relevant metadata.
-echo ":test-result: $res" > $trs_file
-echo ":global-test-result: $res" >> $trs_file
-echo ":recheck: $recheck" >> $trs_file
-echo ":copy-in-global-log: $gcopy" >> $trs_file
-
-# Local Variables:
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-# sh-indentation: 2
-# eval: (add-hook 'before-save-hook 'time-stamp)
-# time-stamp-start: "scriptversion="
-# time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
-# time-stamp-end: "; # UTC"
-# End:

tests/00_runnable.test

@@ -1,5 +1,7 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # check that httrack starts
 httrack --version >/dev/null

tests/01_engine-cache-golden.test

@@ -0,0 +1,48 @@
+#!/bin/bash
+#
+# Keep this POSIX-portable: the harness runs it via $(BASH), which is a plain
+# POSIX /bin/sh on some platforms (e.g. macOS), so avoid bashisms and GNU-only
+# tool flags despite the #!/bin/bash above.
+
+# Golden cache-format regression test (driven by 'httrack -#B <dir>').
+#
+# 01_engine-cache.test writes the cache with the same build it reads back (a
+# round-trip), so it cannot catch a read-path or ZIP-format regression where
+# writer and reader drift together. This reads a *committed* cache frozen by an
+# earlier build and asserts a fixed set of entries still decodes field- and
+# byte-exact.
+#
+# Regenerate the fixture after a deliberate format change with
+# 'httrack -#B <dir> regen', then copy <dir>/hts-cache/new.zip over the
+# committed file.
+
+set -eu
+
+: "${top_srcdir:=..}"
+fixture="$top_srcdir/tests/fixtures/cache-golden"
+
+test -e "$fixture/hts-cache/new.zip" || {
+    echo "missing committed cache fixture: $fixture/hts-cache/new.zip" >&2
+    exit 1
+}
+
+dir=$(mktemp -d)
+trap 'rm -rf "$dir"' EXIT
+
+# Read against a private copy so the source tree is never touched (a read
+# session does not write, but copying keeps the test hermetic). Create the dir
+# with mkdir so it is writable for the cleanup trap: under "make distcheck" the
+# srcdir is read-only, and "cp -r" of that directory would carry its read-only
+# mode over and defeat the rm -rf.
+mkdir -p "$dir/hts-cache"
+cp "$fixture/hts-cache/new.zip" "$dir/hts-cache/new.zip"
+
+out=$(httrack -#B "$dir")
+
+# Match the exact success line: the read must have found and verified every
+# entry, not merely failed to enter the mode (a bad -#B falls through to the
+# usage screen, which also exits non-zero but never prints this).
+test "$out" = "cache-golden: OK" || {
+    echo "expected 'cache-golden: OK', got: $out" >&2
+    exit 1
+}

tests/01_engine-charset.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # charset -> UTF-8 conversion (hts_convertStringToUTF8).
 # -#3 <charset> <string> prints the string re-decoded from <charset> as UTF-8.
 conv() {

tests/01_engine-cmdline.test

@@ -8,7 +8,7 @@
 # --headers) forms, and an over-cap value is refused cleanly rather than
 # overrunning a fixed scratch buffer.
 
-set -u
+set -euo pipefail
 
 tmp=$(mktemp -d "${TMPDIR:-/tmp}/httrack_cmdline.XXXXXX") || exit 1
 trap 'rm -rf "$tmp"' EXIT HUP INT QUIT PIPE TERM
@@ -26,8 +26,8 @@ run() {
     shift
     rm -rf "$out"
     mkdir -p "$out"
-    httrack "file://$tmp/index.html" -O "$out" --quiet -n "$@" >"$out/.log" 2>&1
-    RC=$?
+    RC=0
+    httrack "file://$tmp/index.html" -O "$out" --quiet -n "$@" >"$out/.log" 2>&1 || RC=$?
 }
 
 # crawl using exactly the given args as the only URL(s), no implicit primary URL;
@@ -37,8 +37,8 @@ run_only() {
     shift
     rm -rf "$out"
     mkdir -p "$out"
-    httrack -O "$out" --quiet -n "$@" >"$out/.log" 2>&1
-    RC=$?
+    RC=0
+    httrack -O "$out" --quiet -n "$@" >"$out/.log" 2>&1 || RC=$?
 }
 
 # assert the value was accepted: clean exit and the fixture was mirrored

tests/01_engine-doitlog.test

@@ -0,0 +1,92 @@
+#!/bin/bash
+#
+
+# doit.log reprise (no network). Re-running httrack in a mirror directory with
+# NO url makes the engine read hts-cache/doit.log and re-insert every recorded
+# argument into the command line through htscoremain.c's cmdl_ins macro (the
+# x_argvblk builder). That path is distinct from the rc-file one in
+# 01_engine-rcfile.test (htsalias.c) and from the url-on-command-line update in
+# 02_update-cache.test, and nothing else exercises it. Two properties:
+#   1. A multi-token reprise re-mirrors cleanly: every token (the url and each
+#      option) survives the back-to-back packing, so the no-url run reproduces
+#      the file set with no errors. A packing/bound bug corrupts a later token
+#      and surfaces as an error or a missing file.
+#   2. The reprise actually re-crawls through the inserted url: changing a source
+#      file and re-running with no url picks up the new content.
+
+set -euo pipefail
+
+# Resolve httrack to an absolute path before we cd: PATH may hold a
+# build-relative entry that would not resolve from the temp directory.
+bin=$(command -v httrack) || {
+    echo "FAIL: httrack not found on PATH"
+    exit 1
+}
+case "$bin" in
+/*) ;;
+*) bin="$(cd "$(dirname "$bin")" && pwd)/$(basename "$bin")" ;;
+esac
+
+tmp=$(mktemp -d "${TMPDIR:-/tmp}/httrack_doitlog.XXXXXX") || exit 1
+trap 'rm -rf "$tmp"' EXIT HUP INT QUIT PIPE TERM
+
+site="$tmp/site"
+out="$tmp/out"
+mkdir -p "$site/sub"
+printf '<a href="a.html">a</a> <a href="sub/b.html">b</a>' >"$site/index.html"
+echo 'OLDCONTENT' >"$site/a.html"
+echo '<p>bbb</p>' >"$site/sub/b.html"
+url="file://$site/index.html"
+
+# count Error: lines in the log (grep -c exits 1 on zero matches: guard it)
+errors() { grep -ciE '^[0-9:]*[[:space:]]Error:' "$out/hts-log.txt" || true; }
+
+# initial mirror with the url and a handful of options, so doit.log records a
+# multi-token command line for cmdl_ins to re-insert one token at a time.
+rc=0
+"$bin" "$url" -O "$out" --quiet -n -%v0 -r3 >/dev/null 2>&1 || rc=$?
+test "$rc" -eq 0 || {
+    echo "FAIL: initial mirror exited $rc"
+    exit 1
+}
+test -f "$out/hts-cache/doit.log" || {
+    echo "FAIL: doit.log not written by the initial mirror"
+    exit 1
+}
+
+# --- 1. no-url reprise re-mirrors cleanly -----------------------------------
+# No url on the command line, so the engine loads doit.log and re-inserts the
+# recorded arguments (cmdl_ins). -O selects the mirror; argv carries no url.
+rc=0
+"$bin" -O "$out" --quiet >/dev/null 2>&1 || rc=$?
+test "$rc" -eq 0 || {
+    echo "FAIL: doit.log reprise exited $rc"
+    exit 1
+}
+test "$(errors)" = 0 || {
+    echo "FAIL: doit.log reprise reported errors (a token may have been corrupted)"
+    grep -iE 'Error:' "$out/hts-log.txt" | head -3
+    exit 1
+}
+for suffix in a.html sub/b.html; do
+    test -n "$(find "$out" -path "*/$suffix" -print -quit)" || {
+        echo "FAIL: $suffix missing after the no-url reprise"
+        exit 1
+    }
+done
+
+# --- 2. the reprise re-crawls through the inserted url -----------------------
+sleep 1
+echo 'NEWCONTENT' >"$site/a.html"
+rc=0
+"$bin" -O "$out" --quiet >/dev/null 2>&1 || rc=$?
+test "$rc" -eq 0 || {
+    echo "FAIL: second reprise exited $rc"
+    exit 1
+}
+grep -q NEWCONTENT "$(find "$out" -path '*/a.html' -print -quit)" || {
+    echo "FAIL: reprise did not pick up the changed source (inserted url not re-crawled)"
+    exit 1
+}
+
+exit 0

tests/01_engine-entities.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # HTML entity unescaping (hts_unescapeEntitiesWithCharset).
 # -#6 <string> prints the string with entities decoded (UTF-8 output).
 ent() {

tests/01_engine-filter.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # wildcard filter engine (strjoker), the core of +/- include/exclude rules.
 # -#0 <filter> <string> prints "<string> does match <filter>" or "... does NOT match ...".
 

tests/01_engine-hashtable.test

@@ -1,5 +1,7 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # httrack internal hashtable autotest on 100K keys
 httrack -#7 100000

tests/01_engine-idna.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # IDNA / punycode encode (-#4) and decode (-#5). This code has a CVE history,
 # so the edge cases below cover passthrough, round-trips, and malformed input.
 

tests/01_engine-mime.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # MIME type guessing from extension (get_httptype / give_mimext).
 # -#2 <path> prints "<path> is '<mime>'" then "and its local type is '.<ext>'".
 

tests/01_engine-parse.test

@@ -4,7 +4,7 @@
 # Offline HTML parser tests: each section crawls a file:// fixture (no network)
 # and checks which assets the parser captured and how it rewrote the links.
 
-set -u
+set -euo pipefail
 
 tmp=$(mktemp -d "${TMPDIR:-/tmp}/httrack_parse.XXXXXX") || exit 1
 trap 'rm -rf "$tmp"' EXIT HUP INT QUIT PIPE TERM
@@ -19,7 +19,9 @@ crawl() {
     local html="$1" out="$2"
     rm -rf "$out"
     mkdir -p "$out"
-    httrack "file://$html" -O "$out" --quiet --near -n >"$out/.log" 2>&1
+    # the crawl's own exit status is irrelevant here; the assertions below check
+    # the mirrored files, so don't let set -e trip on a non-zero httrack exit
+    httrack "file://$html" -O "$out" --quiet --near -n >"$out/.log" 2>&1 || true
 }
 
 # assert a file with the given basename was saved somewhere under <out>

tests/01_engine-simplify.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # path simplify engine (fil_simplifie): collapses ./ and ../ segments.
 simp() {
 	test "$(httrack -O /dev/null -#1 "$1")" == "simplified=$2" || exit 1

tests/01_engine-strsafe.test

@@ -1,13 +1,16 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 # htssafe.h bounded string operations (driven by 'httrack -#8').
 
 # Success path: every bounded op (strcpybuff/strcatbuff/strncatbuff/strlcpybuff)
 # must behave correctly. Like the other -# debug modes, a trailing token is
 # required (a bare '-#8' falls through to the usage screen).
-out=$(httrack -#8 run)
-test $? -eq 0 || exit 1
+rc=0
+out=$(httrack -#8 run) || rc=$?
+test "$rc" -eq 0 || exit 1
 test "$out" == "strsafe: OK" || exit 1
 
 # Overflow path: an over-capacity write into a sized buffer must be caught by
@@ -15,7 +18,8 @@ test "$out" == "strsafe: OK" || exit 1
 # Assert the htssafe abort signature specifically, so the test cannot pass for
 # an unrelated reason (e.g. the -#8 mode being gone and falling through to the
 # usage screen, which also exits non-zero).
-err=$(httrack -#8 overflow "this string is far too long for the buffer" 2>&1)
+# the bounded macro aborts (non-zero exit), so don't let set -e trip on it
+err=$(httrack -#8 overflow "this string is far too long for the buffer" 2>&1) || true
 case "$err" in
 	*"strsafe: NOT aborted"*) echo "over-capacity write was NOT caught" >&2; exit 1 ;;
 	*"overflow while copying"*) ;;
@@ -26,7 +30,7 @@ esac
 # capacity (4 bytes into a 4-byte buffer), so this also pins the boundary: a
 # '<=' off-by-one in the capacity check would let it through (and print "NOT
 # aborted"). Match the specific htsbuff abort message, not just any assert.
-err=$(httrack -#8 overflow-buff "abcd" 2>&1)
+err=$(httrack -#8 overflow-buff "abcd" 2>&1) || true
 case "$err" in
 	*"strsafe: NOT aborted"*) echo "htsbuff over-capacity write was NOT caught" >&2; exit 1 ;;
 	*"htsbuff append overflow"*) ;;

tests/02_manpage-regen.test

@@ -8,6 +8,9 @@
 # POSIX /bin/sh on some platforms (e.g. macOS), so avoid bashisms (such as
 # process substitution) despite the #!/bin/bash above.
 
+# pipefail is a bashism; keep to POSIX set flags ($(BASH) may be /bin/sh here).
+set -eu
+
 : "${top_srcdir:=..}"
 
 gen="$top_srcdir/man/makeman.sh"

tests/02_update-cache.test

@@ -10,7 +10,7 @@
 #   2. change a source file, re-mirror -> the update must pick up the new content
 #      (guards the update decision that reads the cached metadata).
 
-set -eu
+set -euo pipefail
 
 site=$(mktemp -d)
 out=$(mktemp -d)
@@ -42,7 +42,7 @@ test "$(errors)" = 0 || {
     exit 1
 }
 for suffix in a.html sub/b.html; do
-    find "$out" -path "*/$suffix" | grep -q . || {
+    test -n "$(find "$out" -path "*/$suffix" -print -quit)" || {
         echo "missing $suffix after update" >&2
         exit 1
     }

tests/10_crawl-simple.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 bash check-network.sh ||  ! echo "skipping online unit tests" || exit 77
 
 bash crawl-test.sh --errors 0 --files 5 httrack http://ut.httrack.com/simple/basic.html

tests/11_crawl-cookies.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 bash check-network.sh ||  ! echo "skipping online unit tests" || exit 77
 
 bash crawl-test.sh --errors 0 --files 3 \

tests/11_crawl-idna.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 bash check-network.sh ||  ! echo "skipping online unit tests" || exit 77
 
 # unicode tests

tests/11_crawl-international.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 bash check-network.sh ||  ! echo "skipping online unit tests" || exit 77
 
 # unicode tests

tests/11_crawl-longurl.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 bash check-network.sh ||  ! echo "skipping online unit tests" || exit 77
 
 # http://code.google.com/p/httrack/issues/detail?id=42&can=1

tests/11_crawl-parsing.test

@@ -1,6 +1,8 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 bash check-network.sh ||  ! echo "skipping online unit tests" || exit 77
 
 # http://code.google.com/p/httrack/issues/detail?id=4&can=1

tests/12_crawl_https.test

@@ -1,9 +1,11 @@
 #!/bin/bash
 #
 
+set -euo pipefail
+
 bash check-network.sh ||  ! echo "skipping online unit tests" || exit 77
 
-if test "$HTTPS_SUPPORT" == "no"; then
+if test "${HTTPS_SUPPORT:-}" == "no"; then
 	echo "no https support compiled, skipping"
 	exit 77
 fi

tests/Makefile.am

@@ -1,4 +1,8 @@
-EXTRA_DIST = $(TESTS) crawl-test.sh run-all-tests.sh check-network.sh
+# Committed binary fixture read by 01_engine-cache-golden.test. List it
+# explicitly: automake does not expand wildcards in EXTRA_DIST, so a glob would
+# silently drop it from the dist tarball and break "make distcheck".
+EXTRA_DIST = $(TESTS) crawl-test.sh run-all-tests.sh check-network.sh \
+	fixtures/cache-golden/hts-cache/new.zip
 
 TESTS_ENVIRONMENT =
 TESTS_ENVIRONMENT += PATH=$(top_builddir)/src$(PATH_SEPARATOR)$$PATH
@@ -17,8 +21,10 @@ TEST_LOG_COMPILER = $(BASH)
 TESTS = \
 	00_runnable.test \
 	01_engine-cache.test \
+	01_engine-cache-golden.test \
 	01_engine-charset.test \
 	01_engine-cmdline.test \
+	01_engine-doitlog.test \
 	01_engine-entities.test \
 	01_engine-filter.test \
 	01_engine-hashtable.test \

tests/Makefile.in

@@ -1,907 +0,0 @@
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-
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-
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-VPATH = @srcdir@
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-  else \
-    false; \
-  fi; \
-}
-am__make_running_with_option = \
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-      *) echo "am__make_running_with_option: internal error: invalid" \
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-    }; \
-  if (recheck) \
-    print $$0; \
-  close ($$0 ".trs"); \
-  close ($$0 ".log"); \
-}'
-# A command that, given a newline-separated list of test names on the
-# standard input, create the global log from their .trs and .log files.
-am__create_global_log = $(AWK) ' \
-function fatal(msg) \
-{ \
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-{ \
-  print header; \
-  len = length(header); \
-  for (i = 1; i <= len; i = i + 1) \
-    printf "="; \
-  printf "\n\n"; \
-} \
-{ \
-  copy_in_global_log = 1; \
-  global_test_result = "RUN"; \
-  while ((rc = (getline line < ($$0 ".trs"))) != 0) \
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-      while ((rc = (getline line < ($$0 ".log"))) != 0) \
-      { \
-        if (rc < 0) \
-          fatal("failed to read from " $$0 ".log"); \
-        print line; \
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-# Solaris 10 'make', and several other traditional 'make' implementations,
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-$(am__sh_e_setup);					\
-$(am__vpath_adj_setup) $(am__vpath_adj)			\
-$(am__tty_colors);					\
-srcdir=$(srcdir); export srcdir;			\
-case "$@" in						\
-  */*) am__odir=`echo "./$@" | sed 's|/[^/]*$$||'`;;	\
-    *) am__odir=.;; 					\
-esac;							\
-test "x$$am__odir" = x"." || test -d "$$am__odir" 	\
-  || $(MKDIR_P) "$$am__odir" || exit $$?;		\
-if test -f "./$$f"; then dir=./;			\
-elif test -f "$$f"; then dir=;				\
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-tst=$$dir$$f; log='$@'; 				\
-if test -n '$(IGNORE_SKIPPED_LOGS)'; then		\
-  am__collect_skipped_logs='--collect-skipped-logs no';	\
-else							\
-  am__collect_skipped_logs='';				\
-fi;							\
-if test -n '$(DISABLE_HARD_ERRORS)'; then		\
-  am__enable_hard_errors=no; 				\
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-# A shell command to get the names of the tests scripts with any registered
-# extension removed (i.e., equivalently, the names of the test logs, with
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-  bases=`for i in $$bases; do echo $$i; done | sed 's/\.log$$//'`; \
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-AM_TESTSUITE_SUMMARY_HEADER = ' for $(PACKAGE_STRING)'
-RECHECK_LOGS = $(TEST_LOGS)
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-TEST_LOGS = $(am__test_logs2:.test.log=.log)
-TEST_LOG_DRIVER = $(SHELL) $(top_srcdir)/test-driver
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-AM_CFLAGS = @AM_CFLAGS@
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-LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
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-MKDIR_P = @MKDIR_P@
-NM = @NM@
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-ONLINE_UNIT_TESTS = @ONLINE_UNIT_TESTS@
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-OTOOL = @OTOOL@
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-PACKAGE = @PACKAGE@
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-PACKAGE_TARNAME = @PACKAGE_TARNAME@
-PACKAGE_URL = @PACKAGE_URL@
-PACKAGE_VERSION = @PACKAGE_VERSION@
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-RANLIB = @RANLIB@
-SED = @SED@
-SET_MAKE = @SET_MAKE@
-SHELL = @SHELL@
-SHLIBPATH_VAR = @SHLIBPATH_VAR@
-SOCKET_LIBS = @SOCKET_LIBS@
-STRIP = @STRIP@
-THREADS_CFLAGS = @THREADS_CFLAGS@
-THREADS_LIBS = @THREADS_LIBS@
-V6_FLAG = @V6_FLAG@
-VERSION = @VERSION@
-VERSION_INFO = @VERSION_INFO@
-abs_builddir = @abs_builddir@
-abs_srcdir = @abs_srcdir@
-abs_top_builddir = @abs_top_builddir@
-abs_top_srcdir = @abs_top_srcdir@
-ac_ct_AR = @ac_ct_AR@
-ac_ct_CC = @ac_ct_CC@
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-am__include = @am__include@
-am__leading_dot = @am__leading_dot@
-am__quote = @am__quote@
-am__rm_f_notfound = @am__rm_f_notfound@
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-datadir = @datadir@
-datarootdir = @datarootdir@
-docdir = @docdir@
-dvidir = @dvidir@
-exec_prefix = @exec_prefix@
-host = @host@
-host_alias = @host_alias@
-host_cpu = @host_cpu@
-host_os = @host_os@
-host_vendor = @host_vendor@
-htmldir = @htmldir@
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-infodir = @infodir@
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-libdir = @libdir@
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-localstatedir = @localstatedir@
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-mkdir_p = @mkdir_p@
-oldincludedir = @oldincludedir@
-pdfdir = @pdfdir@
-prefix = @prefix@
-program_transform_name = @program_transform_name@
-psdir = @psdir@
-runstatedir = @runstatedir@
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-top_build_prefix = @top_build_prefix@
-top_builddir = @top_builddir@
-top_srcdir = @top_srcdir@
-EXTRA_DIST = $(TESTS) crawl-test.sh run-all-tests.sh check-network.sh
-# note: libtool should handle that
-### TESTS_ENVIRONMENT += $(SHLIBPATH_VAR)="$(top_builddir)/src/$(LT_CV_OBJDIR)$${$(SHLIBPATH_VAR):+$(PATH_SEPARATOR)}$$$(SHLIBPATH_VAR)"
-TESTS_ENVIRONMENT = PATH=$(top_builddir)/src$(PATH_SEPARATOR)$$PATH \
-	ONLINE_UNIT_TESTS=$(ONLINE_UNIT_TESTS) \
-	HTTPS_SUPPORT=$(HTTPS_SUPPORT) top_srcdir=$(top_srcdir)
-TEST_EXTENSIONS = .test
-# Run each .test through bash instead of execve()ing it. This lets "make check"
-# work when the source tree sits on a noexec filesystem (the driver would
-# otherwise fail with "Permission denied"), and removes any reliance on the
-# scripts' executable bit. The scripts are #!/bin/bash and use bash features.
-TEST_LOG_COMPILER = $(BASH)
-TESTS = \
-	00_runnable.test \
-	01_engine-cache.test \
-	01_engine-charset.test \
-	01_engine-cmdline.test \
-	01_engine-entities.test \
-	01_engine-filter.test \
-	01_engine-hashtable.test \
-	01_engine-idna.test \
-	01_engine-mime.test \
-	01_engine-parse.test \
-	01_engine-rcfile.test \
-	01_engine-simplify.test \
-	01_engine-strsafe.test \
-	02_manpage-regen.test \
-	02_update-cache.test \
-	10_crawl-simple.test \
-	11_crawl-cookies.test \
-	11_crawl-idna.test \
-	11_crawl-international.test \
-	11_crawl-longurl.test \
-	11_crawl-parsing.test \
-	12_crawl_https.test
-
-CLEANFILES = check-network_sh.cache
-all: all-am
-
-.SUFFIXES:
-.SUFFIXES: .log .test .test$(EXEEXT) .trs
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-	        && { if test -f $@; then exit 0; else break; fi; }; \
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-	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
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-	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
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-am--force-recheck:
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-	redo_bases=`for i in $$bases; do \
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-	if test -n "$$redo_bases"; then \
-	  redo_logs=`for i in $$redo_bases; do echo $$i.log; done`; \
-	  redo_results=`for i in $$redo_bases; do echo $$i.trs; done`; \
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-	{ \
-	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
-	  result_count $$1 "PASS: " $$pass  "$$grn"; \
-	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
-	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
-	  result_count $$1 "FAIL: " $$fail  "$$red"; \
-	  result_count $$1 "XPASS:" $$xpass "$$red"; \
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-	output_system_information () \
-	{ \
-          echo;                                     \
-	  { uname -a | $(AWK) '{                    \
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-    {                                               \
-      if (i != 2)                                   \
-        printf " %s", $$i;                          \
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-  printf "\n";                                      \
-}'; } 2>&1;                                         \
-	  if test -r /etc/os-release; then          \
-	    echo "Distribution information (/etc/os-release):"; \
-	    sed 8q /etc/os-release;                 \
-	  elif test -r /etc/issue; then             \
-	    echo "Distribution information (/etc/issue):";      \
-	    cat /etc/issue;                         \
-	  fi;                                       \
-	}; \
-	please_report () \
-	{ \
-echo "Some test(s) failed.  Please report this to $(PACKAGE_BUGREPORT),";    \
-echo "together with the test-suite.log file (gzipped) and your system";      \
-echo "information.  Thanks.";                                                \
-	}; \
-	{								\
-	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
-	    $(am__rst_title);						\
-	  create_testsuite_report --no-color;				\
-	  output_system_information;                                    \
-	  echo;								\
-	  echo ".. contents:: :depth: 2";				\
-	  echo;								\
-	  for b in $$bases; do echo $$b; done				\
-	    | $(am__create_global_log);					\
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-	  col="$$grn";							\
-	 else								\
-	  col="$$red";							\
-	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
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-	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG) for debugging.$${std}";\
-	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
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-	  echo "$$col$$br$$std";					\
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-	$$success || exit 1
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-	@$(am__rm_f) $(RECHECK_LOGS)
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