diff options
Diffstat (limited to 'gnulib-m4/mbrtowc.m4')
| -rw-r--r-- | gnulib-m4/mbrtowc.m4 | 64 |
1 files changed, 56 insertions, 8 deletions
diff --git a/gnulib-m4/mbrtowc.m4 b/gnulib-m4/mbrtowc.m4 index c0d751dc..5edf08be 100644 --- a/gnulib-m4/mbrtowc.m4 +++ b/gnulib-m4/mbrtowc.m4 @@ -1,5 +1,5 @@ -# mbrtowc.m4 serial 26 -dnl Copyright (C) 2001-2002, 2004-2005, 2008-2015 Free Software Foundation, +# mbrtowc.m4 serial 27 -*- coding: utf-8 -*- +dnl Copyright (C) 2001-2002, 2004-2005, 2008-2016 Free Software Foundation, dnl Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -40,6 +40,7 @@ AC_DEFUN([gl_FUNC_MBRTOWC], gl_MBRTOWC_RETVAL gl_MBRTOWC_NUL_RETVAL gl_MBRTOWC_EMPTY_INPUT + gl_MBRTOWC_C_LOCALE case "$gl_cv_func_mbrtowc_null_arg1" in *yes) ;; *) AC_DEFINE([MBRTOWC_NULL_ARG1_BUG], [1], @@ -76,6 +77,13 @@ AC_DEFUN([gl_FUNC_MBRTOWC], REPLACE_MBRTOWC=1 ;; esac + case $gl_cv_C_locale_sans_EILSEQ in + *yes) ;; + *) AC_DEFINE([C_LOCALE_MAYBE_EILSEQ], [1], + [Define to 1 if the C locale may have encoding errors.]) + REPLACE_MBRTOWC=1 + ;; + esac fi fi ]) @@ -156,7 +164,7 @@ int main () memset (&state, '\0', sizeof (mbstate_t)); if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2)) if (mbsinit (&state)) - return 1; + return 2; } return 0; }]])], @@ -216,7 +224,7 @@ int main () memset (&state, '\0', sizeof (mbstate_t)); if (mbrtowc (&wc, input + 3, 6, &state) != 4 && mbtowc (&wc, input + 3, 6) == 4) - return 1; + return 2; } return 0; }]])], @@ -344,7 +352,7 @@ int main () mbrtowc (&wc, NULL, 5, &state); /* Check that wc was not modified. */ if (wc != (wchar_t) 0xBADFACE) - return 1; + return 2; } return 0; }]])], @@ -531,7 +539,7 @@ int main () memset (&state, '\0', sizeof (mbstate_t)); if (mbrtowc (&wc, "", 1, &state) != 0) - return 1; + return 2; } return 0; }]])], @@ -569,14 +577,54 @@ changequote([,])dnl int main (void) { - return mbrtowc (&wc, "", 0, &mbs) == (size_t) -2; + return mbrtowc (&wc, "", 0, &mbs) != (size_t) -2; }]])], - [gl_cv_func_mbrtowc_empty_input=no], [gl_cv_func_mbrtowc_empty_input=yes], + [gl_cv_func_mbrtowc_empty_input=no], [:]) ]) ]) +dnl Test whether mbrtowc reports encoding errors in the C locale. +dnl Although POSIX was never intended to allow this, the GNU C Library +dnl and other implementations do it. See: +dnl https://sourceware.org/bugzilla/show_bug.cgi?id=19932 + +AC_DEFUN([gl_MBRTOWC_C_LOCALE], +[ + AC_CACHE_CHECK([whether the C locale is free of encoding errors], + [gl_cv_C_locale_sans_EILSEQ], + [ + dnl Initial guess, used when cross-compiling or when no suitable locale + dnl is present. + gl_cv_C_locale_sans_EILSEQ="guessing no" + + AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <limits.h> + #include <locale.h> + #include <wchar.h> + ]], [[ + int i; + char *locale = setlocale (LC_ALL, "C"); + if (! locale) + return 2; + for (i = CHAR_MIN; i <= CHAR_MAX; i++) + { + char c = i; + wchar_t wc; + mbstate_t mbs = { 0, }; + size_t ss = mbrtowc (&wc, &c, 1, &mbs); + if (1 < ss) + return 3; + } + return 0; + ]])], + [gl_cv_C_locale_sans_EILSEQ=yes], + [gl_cv_C_locale_sans_EILSEQ=no], + [:])]) +]) + # Prerequisites of lib/mbrtowc.c. AC_DEFUN([gl_PREREQ_MBRTOWC], [ : |