| 1 | # mbsrtowcs.m4 serial 14
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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_MBSRTOWCS],
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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([mbsrtowcs])
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| 15 | if test $ac_cv_func_mbsrtowcs = no; then
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| 16 | HAVE_MBSRTOWCS=0
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| 17 | AC_CHECK_DECLS([mbsrtowcs],,, [[
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| 18 | #include <wchar.h>
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| 19 | ]])
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| 20 | if test $ac_cv_have_decl_mbsrtowcs = yes; then
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| 21 | dnl On Minix 3.1.8, the system's <wchar.h> declares mbsrtowcs() 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_MBSRTOWCS=1
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| 25 | fi
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| 26 | else
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| 27 | if test $REPLACE_MBSTATE_T = 1; then
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| 28 | REPLACE_MBSRTOWCS=1
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| 29 | else
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| 30 | gl_MBSRTOWCS_WORKS
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| 31 | case "$gl_cv_func_mbsrtowcs_works" in
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| 32 | *yes) ;;
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| 33 | *) REPLACE_MBSRTOWCS=1 ;;
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| 34 | esac
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| 35 | fi
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| 36 | fi
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| 37 | ])
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| 38 |
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| 39 | dnl Test whether mbsrtowcs works.
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| 40 | dnl Result is gl_cv_func_mbsrtowcs_works.
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| 41 |
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| 42 | AC_DEFUN([gl_MBSRTOWCS_WORKS],
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| 43 | [
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| 44 | AC_REQUIRE([AC_PROG_CC])
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| 45 | AC_REQUIRE([gt_LOCALE_FR])
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| 46 | AC_REQUIRE([gt_LOCALE_FR_UTF8])
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| 47 | AC_REQUIRE([gt_LOCALE_JA])
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| 48 | AC_REQUIRE([gt_LOCALE_ZH_CN])
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| 49 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 50 | AC_CACHE_CHECK([whether mbsrtowcs works],
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| 51 | [gl_cv_func_mbsrtowcs_works],
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| 52 | [
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| 53 | dnl Initial guess, used when cross-compiling or when no suitable locale
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| 54 | dnl is present.
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| 55 | changequote(,)dnl
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| 56 | case "$host_os" in
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| 57 | # Guess no on HP-UX, Solaris, mingw.
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| 58 | hpux* | solaris* | mingw*) gl_cv_func_mbsrtowcs_works="guessing no" ;;
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| 59 | # Guess yes otherwise.
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| 60 | *) gl_cv_func_mbsrtowcs_works="guessing yes" ;;
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| 61 | esac
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| 62 | changequote([,])dnl
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| 63 | if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
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| 64 | AC_RUN_IFELSE(
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| 65 | [AC_LANG_SOURCE([[
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| 66 | #include <locale.h>
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| 67 | #include <string.h>
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| 68 | #include <wchar.h>
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| 69 | int main ()
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| 70 | {
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| 71 | int result = 0;
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| 72 | /* Test whether the function supports a NULL destination argument.
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| 73 | This fails on native Windows. */
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| 74 | if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
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| 75 | {
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| 76 | const char input[] = "\337er";
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| 77 | const char *src = input;
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| 78 | mbstate_t state;
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| 79 |
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| 80 | memset (&state, '\0', sizeof (mbstate_t));
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| 81 | if (mbsrtowcs (NULL, &src, 1, &state) != 3
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| 82 | || src != input)
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| 83 | result |= 1;
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| 84 | }
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| 85 | /* Test whether the function works when started with a conversion state
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| 86 | in non-initial state. This fails on HP-UX 11.11 and Solaris 10. */
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| 87 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
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| 88 | {
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| 89 | const char input[] = "B\303\274\303\237er";
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| 90 | mbstate_t state;
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| 91 |
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| 92 | memset (&state, '\0', sizeof (mbstate_t));
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| 93 | if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
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| 94 | if (!mbsinit (&state))
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| 95 | {
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| 96 | const char *src = input + 2;
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| 97 | if (mbsrtowcs (NULL, &src, 10, &state) != 4)
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| 98 | result |= 2;
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| 99 | }
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| 100 | }
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| 101 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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| 102 | {
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| 103 | const char input[] = "<\306\374\313\334\270\354>";
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| 104 | mbstate_t state;
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| 105 |
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| 106 | memset (&state, '\0', sizeof (mbstate_t));
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| 107 | if (mbrtowc (NULL, input + 3, 1, &state) == (size_t)(-2))
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| 108 | if (!mbsinit (&state))
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| 109 | {
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| 110 | const char *src = input + 4;
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| 111 | if (mbsrtowcs (NULL, &src, 10, &state) != 3)
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| 112 | result |= 4;
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| 113 | }
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| 114 | }
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| 115 | if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
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| 116 | {
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| 117 | const char input[] = "B\250\271\201\060\211\070er";
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| 118 | mbstate_t state;
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| 119 |
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| 120 | memset (&state, '\0', sizeof (mbstate_t));
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| 121 | if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
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| 122 | if (!mbsinit (&state))
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| 123 | {
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| 124 | const char *src = input + 2;
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| 125 | if (mbsrtowcs (NULL, &src, 10, &state) != 4)
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| 126 | result |= 8;
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| 127 | }
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| 128 | }
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| 129 | return result;
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| 130 | }]])],
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| 131 | [gl_cv_func_mbsrtowcs_works=yes],
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| 132 | [gl_cv_func_mbsrtowcs_works=no],
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| 133 | [:])
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| 134 | fi
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| 135 | ])
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| 136 | ])
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| 137 |
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| 138 | # Prerequisites of lib/mbsrtowcs.c.
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| 139 | AC_DEFUN([gl_PREREQ_MBSRTOWCS], [
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| 140 | :
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| 141 | ])
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