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57 lines
1.8 KiB
Plaintext
57 lines
1.8 KiB
Plaintext
AC_DEFUN([AC_FUNC_SNPRINTF],
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[AC_CHECK_FUNCS(snprintf vsnprintf)
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AC_MSG_CHECKING(for working snprintf)
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AC_CACHE_VAL(ac_cv_have_working_snprintf,
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[AC_TRY_RUN(
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[#include <stdio.h>
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int main(void)
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{
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char bufs[5] = { 'x', 'x', 'x', '\0', '\0' };
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char bufd[5] = { 'x', 'x', 'x', '\0', '\0' };
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int i;
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i = snprintf (bufs, 2, "%s", "111");
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if (strcmp (bufs, "1")) exit (1);
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if (i != 3) exit (1);
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i = snprintf (bufd, 2, "%d", 111);
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if (strcmp (bufd, "1")) exit (1);
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if (i != 3) exit (1);
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exit(0);
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}], ac_cv_have_working_snprintf=yes, ac_cv_have_working_snprintf=no, ac_cv_have_working_snprintf=cross)])
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AC_MSG_RESULT([$ac_cv_have_working_snprintf])
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AC_MSG_CHECKING(for working vsnprintf)
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AC_CACHE_VAL(ac_cv_have_working_vsnprintf,
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[AC_TRY_RUN(
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[#include <stdio.h>
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#include <stdarg.h>
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int my_vsnprintf (char *buf, const char *tmpl, ...)
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{
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int i;
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va_list args;
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va_start (args, tmpl);
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i = vsnprintf (buf, 2, tmpl, args);
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va_end (args);
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return i;
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}
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int main(void)
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{
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char bufs[5] = { 'x', 'x', 'x', '\0', '\0' };
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char bufd[5] = { 'x', 'x', 'x', '\0', '\0' };
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int i;
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i = my_vsnprintf (bufs, "%s", "111");
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if (strcmp (bufs, "1")) exit (1);
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if (i != 3) exit (1);
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i = my_vsnprintf (bufd, "%d", 111);
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if (strcmp (bufd, "1")) exit (1);
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if (i != 3) exit (1);
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exit(0);
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}], ac_cv_have_working_vsnprintf=yes, ac_cv_have_working_vsnprintf=no, ac_cv_have_working_vsnprintf=cross)])
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AC_MSG_RESULT([$ac_cv_have_working_vsnprintf])
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if test x$ac_cv_have_working_snprintf$ac_cv_have_working_vsnprintf != "xyesyes"; then
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AC_LIBOBJ(snprintf)
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AC_MSG_WARN([Replacing missing/broken (v)snprintf() with version from http://www.ijs.si/software/snprintf/.])
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AC_DEFINE(PREFER_PORTABLE_SNPRINTF, 1, "enable replacement (v)snprintf if system (v)snprintf is broken")
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fi])
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