| 1 | # wcrtomb.m4 serial 17
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| 2 | dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN([gl_FUNC_WCRTOMB],
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| 8 | [
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| 9 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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| 10 |
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| 11 | AC_REQUIRE([AC_TYPE_MBSTATE_T])
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| 12 | gl_MBSTATE_T_BROKEN
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| 13 |
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| 14 | AC_CHECK_FUNCS_ONCE([wcrtomb])
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| 15 | if test $ac_cv_func_wcrtomb = no; then
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| 16 | HAVE_WCRTOMB=0
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| 17 | AC_CHECK_DECLS([wcrtomb],,, [[
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| 18 | #include <wchar.h>
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| 19 | ]])
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| 20 | if test $ac_cv_have_decl_wcrtomb = yes; then
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| 21 | dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although
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| 22 | dnl it does not have the function. Avoid a collision with gnulib's
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| 23 | dnl replacement.
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| 24 | REPLACE_WCRTOMB=1
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| 25 | fi
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| 26 | else
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| 27 | dnl We don't actually need to override wcrtomb when redefining the semantics
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| 28 | dnl of the mbstate_t type. Tested on 32-bit AIX.
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| 29 | dnl if test $REPLACE_MBSTATE_T = 1; then
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| 30 | dnl REPLACE_WCRTOMB=1
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| 31 | dnl fi
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| 32 | if test $REPLACE_WCRTOMB = 0; then
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| 33 | dnl On Android 4.3, wcrtomb produces wrong characters in the C locale.
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| 34 | dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL)
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| 35 | dnl sometimes returns 0 instead of 1.
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| 36 | AC_REQUIRE([AC_PROG_CC])
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| 37 | AC_REQUIRE([gt_LOCALE_FR])
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| 38 | AC_REQUIRE([gt_LOCALE_FR_UTF8])
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| 39 | AC_REQUIRE([gt_LOCALE_JA])
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| 40 | AC_REQUIRE([gt_LOCALE_ZH_CN])
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| 41 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 42 | AC_CACHE_CHECK([whether wcrtomb works in the C locale],
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| 43 | [gl_cv_func_wcrtomb_works],
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| 44 | [AC_RUN_IFELSE(
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| 45 | [AC_LANG_SOURCE([[
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| 46 | #include <string.h>
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| 47 | #include <stdlib.h>
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| 48 | #include <wchar.h>
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| 49 | int main ()
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| 50 | {
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| 51 | mbstate_t state;
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| 52 | char out[64];
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| 53 | int count;
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| 54 | memset (&state, 0, sizeof (state));
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| 55 | out[0] = 'x';
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| 56 | count = wcrtomb (out, L'a', &state);
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| 57 | return !(count == 1 && out[0] == 'a');
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| 58 | }]])],
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| 59 | [gl_cv_func_wcrtomb_works=yes],
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| 60 | [gl_cv_func_wcrtomb_works=no],
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| 61 | [case "$host_os" in
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| 62 | # Guess no on Android.
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| 63 | linux*-android*) gl_cv_func_wcrtomb_works="guessing no";;
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| 64 | # Guess yes otherwise.
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| 65 | *) gl_cv_func_wcrtomb_works="guessing yes";;
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| 66 | esac
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| 67 | ])
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| 68 | ])
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| 69 | case "$gl_cv_func_wcrtomb_works" in
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| 70 | *yes) ;;
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| 71 | *) AC_DEFINE([WCRTOMB_C_LOCALE_BUG], [1],
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| 72 | [Define if the wcrtomb function does not work in the C locale.])
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| 73 | REPLACE_WCRTOMB=1 ;;
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| 74 | esac
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| 75 | fi
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| 76 | if test $REPLACE_WCRTOMB = 0; then
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| 77 | AC_CACHE_CHECK([whether wcrtomb return value is correct],
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| 78 | [gl_cv_func_wcrtomb_retval],
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| 79 | [
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| 80 | dnl Initial guess, used when cross-compiling or when no suitable locale
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| 81 | dnl is present.
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| 82 | changequote(,)dnl
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| 83 | case "$host_os" in
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| 84 | # Guess no on AIX 4, OSF/1, Solaris, native Windows.
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| 85 | aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;;
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| 86 | # Guess yes otherwise.
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| 87 | *) gl_cv_func_wcrtomb_retval="guessing yes" ;;
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| 88 | esac
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| 89 | changequote([,])dnl
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| 90 | if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
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| 91 | AC_RUN_IFELSE(
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| 92 | [AC_LANG_SOURCE([[
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| 93 | #include <locale.h>
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| 94 | #include <string.h>
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| 95 | #include <wchar.h>
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| 96 | #include <stdlib.h>
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| 97 | int main ()
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| 98 | {
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| 99 | int result = 0;
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| 100 | if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
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| 101 | {
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| 102 | if (wcrtomb (NULL, 0, NULL) != 1)
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| 103 | result |= 1;
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| 104 | }
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| 105 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
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| 106 | {
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| 107 | if (wcrtomb (NULL, 0, NULL) != 1)
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| 108 | result |= 2;
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| 109 | {
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| 110 | wchar_t wc = (wchar_t) 0xBADFACE;
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| 111 | if (mbtowc (&wc, "\303\274", 2) == 2)
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| 112 | if (wcrtomb (NULL, wc, NULL) != 1)
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| 113 | result |= 2;
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| 114 | }
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| 115 | }
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| 116 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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| 117 | {
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| 118 | if (wcrtomb (NULL, 0, NULL) != 1)
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| 119 | result |= 4;
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| 120 | }
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| 121 | if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
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| 122 | {
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| 123 | if (wcrtomb (NULL, 0, NULL) != 1)
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| 124 | result |= 8;
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| 125 | }
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| 126 | return result;
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| 127 | }]])],
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| 128 | [gl_cv_func_wcrtomb_retval=yes],
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| 129 | [gl_cv_func_wcrtomb_retval=no],
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| 130 | [:])
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| 131 | fi
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| 132 | ])
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| 133 | case "$gl_cv_func_wcrtomb_retval" in
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| 134 | *yes) ;;
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| 135 | *) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1],
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| 136 | [Define if the wcrtomb function has an incorrect return value.])
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| 137 | REPLACE_WCRTOMB=1 ;;
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| 138 | esac
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| 139 | fi
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| 140 | fi
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| 141 | ])
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| 142 |
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| 143 | # Prerequisites of lib/wcrtomb.c.
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| 144 | AC_DEFUN([gl_PREREQ_WCRTOMB], [
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| 145 | :
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| 146 | ])
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