| # mbrtoc32.m4 serial 3 |
| dnl Copyright (C) 2014-2020 Free Software Foundation, Inc. |
| dnl This file is free software; the Free Software Foundation |
| dnl gives unlimited permission to copy and/or distribute it, |
| dnl with or without modifications, as long as this notice is preserved. |
| |
| AC_DEFUN([gl_FUNC_MBRTOC32], |
| [ |
| AC_REQUIRE([gl_UCHAR_H_DEFAULTS]) |
| |
| AC_REQUIRE([AC_TYPE_MBSTATE_T]) |
| gl_MBSTATE_T_BROKEN |
| |
| AC_REQUIRE([gl_MBRTOC32_SANITYCHECK]) |
| |
| AC_CHECK_FUNCS_ONCE([mbrtoc32]) |
| if test $ac_cv_func_mbrtoc32 = no; then |
| HAVE_MBRTOC32=0 |
| else |
| if test $REPLACE_MBSTATE_T = 1; then |
| REPLACE_MBRTOC32=1 |
| else |
| gl_MBRTOC32_EMPTY_INPUT |
| gl_MBRTOC32_C_LOCALE |
| case "$gl_cv_func_mbrtoc32_empty_input" in |
| *yes) ;; |
| *) AC_DEFINE([MBRTOC32_EMPTY_INPUT_BUG], [1], |
| [Define if the mbrtoc32 function does not return (size_t) -2 for empty input.]) |
| REPLACE_MBRTOC32=1 |
| ;; |
| esac |
| case "$gl_cv_func_mbrtoc32_C_locale_sans_EILSEQ" in |
| *yes) ;; |
| *) AC_DEFINE([MBRTOC32_IN_C_LOCALE_MAYBE_EILSEQ], [1], |
| [Define if the mbrtoc32 function may signal encoding errors in the C locale.]) |
| REPLACE_MBRTOC32=1 |
| ;; |
| esac |
| fi |
| if test $HAVE_WORKING_MBRTOC32 = 0; then |
| REPLACE_MBRTOC32=1 |
| fi |
| fi |
| ]) |
| |
| AC_DEFUN([gl_MBRTOC32_EMPTY_INPUT], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether mbrtoc32 works on empty input], |
| [gl_cv_func_mbrtoc32_empty_input], |
| [ |
| dnl Initial guess, used when cross-compiling or when no suitable locale |
| dnl is present. |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess no on glibc systems. |
| *-gnu* | gnu*) gl_cv_func_mbrtoc32_empty_input="guessing no" ;; |
| *) gl_cv_func_mbrtoc32_empty_input="guessing yes" ;; |
| esac |
| changequote([,])dnl |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <uchar.h> |
| static char32_t wc; |
| static mbstate_t mbs; |
| int |
| main (void) |
| { |
| return mbrtoc32 (&wc, "", 0, &mbs) != (size_t) -2; |
| }]])], |
| [gl_cv_func_mbrtoc32_empty_input=yes], |
| [gl_cv_func_mbrtoc32_empty_input=no], |
| [:]) |
| ]) |
| ]) |
| |
| AC_DEFUN([gl_MBRTOC32_C_LOCALE], |
| [ |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether the C locale is free of encoding errors], |
| [gl_cv_func_mbrtoc32_C_locale_sans_EILSEQ], |
| [ |
| dnl Initial guess, used when cross-compiling or when no suitable locale |
| dnl is present. |
| gl_cv_func_mbrtoc32_C_locale_sans_EILSEQ="$gl_cross_guess_normal" |
| |
| AC_RUN_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <limits.h> |
| #include <locale.h> |
| #include <uchar.h> |
| ]], [[ |
| int i; |
| char *locale = setlocale (LC_ALL, "C"); |
| if (! locale) |
| return 2; |
| for (i = CHAR_MIN; i <= CHAR_MAX; i++) |
| { |
| char c = i; |
| char32_t wc; |
| mbstate_t mbs = { 0, }; |
| size_t ss = mbrtoc32 (&wc, &c, 1, &mbs); |
| if (1 < ss) |
| return 3; |
| } |
| return 0; |
| ]])], |
| [gl_cv_func_mbrtoc32_C_locale_sans_EILSEQ=yes], |
| [gl_cv_func_mbrtoc32_C_locale_sans_EILSEQ=no], |
| [case "$host_os" in |
| # Guess yes on native Windows. |
| mingw*) gl_cv_func_mbrtoc32_C_locale_sans_EILSEQ="guessing yes" ;; |
| esac |
| ]) |
| ]) |
| ]) |
| |
| dnl Test whether mbrtoc32 works not worse than mbrtowc. |
| dnl Result is HAVE_WORKING_MBRTOC32. |
| |
| AC_DEFUN([gl_MBRTOC32_SANITYCHECK], |
| [ |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_CHECK_FUNCS_ONCE([mbrtoc32]) |
| AC_REQUIRE([gt_LOCALE_FR]) |
| AC_REQUIRE([gt_LOCALE_ZH_CN]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| if test $ac_cv_func_mbrtoc32 = no; then |
| HAVE_WORKING_MBRTOC32=0 |
| else |
| AC_CACHE_CHECK([whether mbrtoc32 works as well as mbrtowc], |
| [gl_cv_func_mbrtoc32_sanitycheck], |
| [ |
| dnl Initial guess, used when cross-compiling or when no suitable locale |
| dnl is present. |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess no on FreeBSD, Solaris, native Windows. |
| freebsd* | solaris* | mingw*) |
| gl_cv_func_mbrtoc32_sanitycheck="guessing no" |
| ;; |
| # Guess yes otherwise. |
| *) |
| gl_cv_func_mbrtoc32_sanitycheck="guessing yes" |
| ;; |
| esac |
| changequote([,])dnl |
| if test $LOCALE_FR != none || test $LOCALE_ZH_CN != none; then |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <locale.h> |
| #include <stdlib.h> |
| #include <string.h> |
| /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| <wchar.h>. |
| BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be |
| included before <wchar.h>. */ |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <time.h> |
| #include <wchar.h> |
| #include <uchar.h> |
| int main () |
| { |
| int result = 0; |
| /* This fails on native Windows: |
| mbrtoc32 returns (size_t)-1. |
| mbrtowc returns 1 (correct). */ |
| if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) |
| { |
| mbstate_t state; |
| wchar_t wc = (wchar_t) 0xBADFACE; |
| memset (&state, '\0', sizeof (mbstate_t)); |
| if (mbrtowc (&wc, "\374", 1, &state) == 1) |
| { |
| char32_t c32 = (wchar_t) 0xBADFACE; |
| memset (&state, '\0', sizeof (mbstate_t)); |
| if (mbrtoc32 (&c32, "\374", 1, &state) != 1) |
| result |= 1; |
| } |
| } |
| /* This fails on FreeBSD 12 and Solaris 11.4: |
| mbrtoc32 returns (size_t)-2 or (size_t)-1. |
| mbrtowc returns 4 (correct). */ |
| if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) |
| { |
| mbstate_t state; |
| wchar_t wc = (wchar_t) 0xBADFACE; |
| memset (&state, '\0', sizeof (mbstate_t)); |
| if (mbrtowc (&wc, "\224\071\375\067", 4, &state) == 4) |
| { |
| char32_t c32 = (wchar_t) 0xBADFACE; |
| memset (&state, '\0', sizeof (mbstate_t)); |
| if (mbrtoc32 (&c32, "\224\071\375\067", 4, &state) != 4) |
| result |= 2; |
| } |
| } |
| return result; |
| }]])], |
| [gl_cv_func_mbrtoc32_sanitycheck=yes], |
| [gl_cv_func_mbrtoc32_sanitycheck=no], |
| [:]) |
| fi |
| ]) |
| case "$gl_cv_func_mbrtoc32_sanitycheck" in |
| *yes) |
| HAVE_WORKING_MBRTOC32=1 |
| AC_DEFINE([HAVE_WORKING_MBRTOC32], [1], |
| [Define if the mbrtoc32 function basically works.]) |
| ;; |
| *) HAVE_WORKING_MBRTOC32=0 ;; |
| esac |
| fi |
| AC_SUBST([HAVE_WORKING_MBRTOC32]) |
| ]) |
| |
| # Prerequisites of lib/mbrtoc32.c and lib/lc-charset-dispatch.c. |
| AC_DEFUN([gl_PREREQ_MBRTOC32], [ |
| : |
| ]) |
