| 1 | # mbrlen.m4 serial 11 -*- coding: utf-8 -*-
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| 2 | dnl Copyright (C) 2008, 2010-2021 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_MBRLEN],
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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 | AC_REQUIRE([gl_FUNC_MBRTOWC])
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| 13 | AC_CHECK_FUNCS_ONCE([mbrlen])
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| 14 | if test $ac_cv_func_mbrlen = no; then
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| 15 | HAVE_MBRLEN=0
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| 16 | AC_CHECK_DECLS([mbrlen],,, [[
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| 17 | #include <wchar.h>
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| 18 | ]])
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| 19 | if test $ac_cv_have_decl_mbrlen = yes; then
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| 20 | dnl On Minix 3.1.8, the system's <wchar.h> declares mbrlen() although
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| 21 | dnl it does not have the function. Avoid a collision with gnulib's
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| 22 | dnl replacement.
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| 23 | REPLACE_MBRLEN=1
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| 24 | fi
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| 25 | else
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| 26 | dnl Most bugs affecting the system's mbrtowc function also affect the
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| 27 | dnl mbrlen function. So override mbrlen whenever mbrtowc is overridden.
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| 28 | dnl We could also run the individual tests below; the results would be
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| 29 | dnl the same.
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| 30 | if test $REPLACE_MBRTOWC = 1; then
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| 31 | REPLACE_MBRLEN=1
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| 32 | fi
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| 33 | fi
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| 34 | ])
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| 35 |
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| 36 | dnl Test whether mbrlen puts the state into non-initial state when parsing an
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| 37 | dnl incomplete multibyte character.
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| 38 | dnl Result is gl_cv_func_mbrlen_incomplete_state.
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| 39 |
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| 40 | AC_DEFUN([gl_MBRLEN_INCOMPLETE_STATE],
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| 41 | [
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| 42 | AC_REQUIRE([AC_PROG_CC])
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| 43 | AC_REQUIRE([gt_LOCALE_JA])
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| 44 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 45 | AC_CACHE_CHECK([whether mbrlen handles incomplete characters],
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| 46 | [gl_cv_func_mbrlen_incomplete_state],
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| 47 | [
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| 48 | dnl Initial guess, used when cross-compiling or when no suitable locale
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| 49 | dnl is present.
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| 50 | changequote(,)dnl
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| 51 | case "$host_os" in
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| 52 | # Guess no on AIX and OSF/1.
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| 53 | aix* | osf*) gl_cv_func_mbrlen_incomplete_state="guessing no" ;;
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| 54 | # Guess yes otherwise.
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| 55 | *) gl_cv_func_mbrlen_incomplete_state="guessing yes" ;;
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| 56 | esac
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| 57 | changequote([,])dnl
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| 58 | if test $LOCALE_JA != none; then
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| 59 | AC_RUN_IFELSE(
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| 60 | [AC_LANG_SOURCE([[
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| 61 | #include <locale.h>
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| 62 | #include <string.h>
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| 63 | #include <wchar.h>
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| 64 | int main ()
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| 65 | {
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| 66 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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| 67 | {
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| 68 | const char input[] = "B\217\253\344\217\251\316er"; /* "BÃŒÃer" */
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| 69 | mbstate_t state;
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| 70 |
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| 71 | memset (&state, '\0', sizeof (mbstate_t));
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| 72 | if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
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| 73 | if (mbsinit (&state))
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| 74 | return 1;
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| 75 | }
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| 76 | return 0;
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| 77 | }]])],
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| 78 | [gl_cv_func_mbrlen_incomplete_state=yes],
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| 79 | [gl_cv_func_mbrlen_incomplete_state=no],
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| 80 | [])
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| 81 | fi
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| 82 | ])
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| 83 | ])
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| 84 |
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| 85 | dnl Test whether mbrlen, when parsing the end of a multibyte character,
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| 86 | dnl correctly returns the number of bytes that were needed to complete the
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| 87 | dnl character (not the total number of bytes of the multibyte character).
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| 88 | dnl Result is gl_cv_func_mbrlen_retval.
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| 89 |
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| 90 | AC_DEFUN([gl_MBRLEN_RETVAL],
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| 91 | [
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| 92 | AC_REQUIRE([AC_PROG_CC])
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| 93 | AC_REQUIRE([gt_LOCALE_FR_UTF8])
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| 94 | AC_REQUIRE([gt_LOCALE_JA])
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| 95 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 96 | AC_CACHE_CHECK([whether mbrlen has a correct return value],
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| 97 | [gl_cv_func_mbrlen_retval],
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| 98 | [
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| 99 | dnl Initial guess, used when cross-compiling or when no suitable locale
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| 100 | dnl is present.
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| 101 | changequote(,)dnl
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| 102 | case "$host_os" in
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| 103 | # Guess no on HP-UX and Solaris.
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| 104 | hpux* | solaris*) gl_cv_func_mbrlen_retval="guessing no" ;;
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| 105 | # Guess yes otherwise.
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| 106 | *) gl_cv_func_mbrlen_retval="guessing yes" ;;
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| 107 | esac
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| 108 | changequote([,])dnl
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| 109 | if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none; then
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| 110 | AC_RUN_IFELSE(
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| 111 | [AC_LANG_SOURCE([[
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| 112 | #include <locale.h>
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| 113 | #include <string.h>
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| 114 | #include <wchar.h>
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| 115 | int main ()
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| 116 | {
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| 117 | int result = 0;
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| 118 | /* This fails on Solaris. */
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| 119 | if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
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| 120 | {
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| 121 | char input[] = "B\303\274\303\237er"; /* "BÃŒÃer" */
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| 122 | mbstate_t state;
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| 123 |
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| 124 | memset (&state, '\0', sizeof (mbstate_t));
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| 125 | if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
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| 126 | {
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| 127 | input[1] = '\0';
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| 128 | if (mbrlen (input + 2, 5, &state) != 1)
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| 129 | result |= 1;
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| 130 | }
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| 131 | }
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| 132 | /* This fails on HP-UX 11.11. */
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| 133 | if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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| 134 | {
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| 135 | char input[] = "B\217\253\344\217\251\316er"; /* "BÃŒÃer" */
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| 136 | mbstate_t state;
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| 137 |
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| 138 | memset (&state, '\0', sizeof (mbstate_t));
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| 139 | if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
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| 140 | {
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| 141 | input[1] = '\0';
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| 142 | if (mbrlen (input + 2, 5, &state) != 2)
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| 143 | result |= 2;
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| 144 | }
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| 145 | }
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| 146 | return result;
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| 147 | }]])],
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| 148 | [gl_cv_func_mbrlen_retval=yes],
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| 149 | [gl_cv_func_mbrlen_retval=no],
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| 150 | [])
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| 151 | fi
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| 152 | ])
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| 153 | ])
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| 154 |
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| 155 | dnl Test whether mbrlen, when parsing a NUL character, correctly returns 0.
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| 156 | dnl Result is gl_cv_func_mbrlen_nul_retval.
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| 157 |
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| 158 | AC_DEFUN([gl_MBRLEN_NUL_RETVAL],
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| 159 | [
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| 160 | AC_REQUIRE([AC_PROG_CC])
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| 161 | AC_REQUIRE([gt_LOCALE_ZH_CN])
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| 162 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 163 | AC_CACHE_CHECK([whether mbrlen returns 0 when parsing a NUL character],
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| 164 | [gl_cv_func_mbrlen_nul_retval],
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| 165 | [
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| 166 | dnl Initial guess, used when cross-compiling or when no suitable locale
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| 167 | dnl is present.
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| 168 | changequote(,)dnl
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| 169 | case "$host_os" in
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| 170 | # Guess no on Solaris 9.
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| 171 | solaris2.9) gl_cv_func_mbrlen_nul_retval="guessing no" ;;
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| 172 | # Guess yes otherwise.
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| 173 | *) gl_cv_func_mbrlen_nul_retval="guessing yes" ;;
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| 174 | esac
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| 175 | changequote([,])dnl
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| 176 | if test $LOCALE_ZH_CN != none; then
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| 177 | AC_RUN_IFELSE(
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| 178 | [AC_LANG_SOURCE([[
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| 179 | #include <locale.h>
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| 180 | #include <string.h>
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| 181 | #include <wchar.h>
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| 182 | int main ()
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| 183 | {
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| 184 | /* This crashes on Solaris 9 inside __mbrtowc_dense_gb18030. */
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| 185 | if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
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| 186 | {
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| 187 | mbstate_t state;
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| 188 |
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| 189 | memset (&state, '\0', sizeof (mbstate_t));
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| 190 | if (mbrlen ("", 1, &state) != 0)
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| 191 | return 1;
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| 192 | }
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| 193 | return 0;
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| 194 | }]])],
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| 195 | [gl_cv_func_mbrlen_nul_retval=yes],
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| 196 | [gl_cv_func_mbrlen_nul_retval=no],
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| 197 | [])
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| 198 | fi
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| 199 | ])
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| 200 | ])
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| 201 |
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| 202 | dnl Test whether mbrlen returns the correct value on empty input.
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| 203 |
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| 204 | AC_DEFUN([gl_MBRLEN_EMPTY_INPUT],
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| 205 | [
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| 206 | AC_REQUIRE([AC_PROG_CC])
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| 207 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 208 | AC_CACHE_CHECK([whether mbrlen works on empty input],
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| 209 | [gl_cv_func_mbrlen_empty_input],
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| 210 | [
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| 211 | dnl Initial guess, used when cross-compiling or when no suitable locale
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| 212 | dnl is present.
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| 213 | changequote(,)dnl
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| 214 | case "$host_os" in
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| 215 | # Guess no on AIX and glibc systems.
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| 216 | aix* | *-gnu* | gnu*) gl_cv_func_mbrlen_empty_input="guessing no" ;;
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| 217 | *) gl_cv_func_mbrlen_empty_input="guessing yes" ;;
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| 218 | esac
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| 219 | changequote([,])dnl
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| 220 | AC_RUN_IFELSE(
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| 221 | [AC_LANG_SOURCE([[
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| 222 | #include <wchar.h>
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| 223 | static mbstate_t mbs;
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| 224 | int
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| 225 | main (void)
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| 226 | {
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| 227 | return mbrlen ("", 0, &mbs) != (size_t) -2;
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| 228 | }]])],
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| 229 | [gl_cv_func_mbrlen_empty_input=yes],
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| 230 | [gl_cv_func_mbrlen_empty_input=no],
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| 231 | [:])
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| 232 | ])
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| 233 | ])
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| 234 |
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| 235 | # Prerequisites of lib/mbrlen.c.
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| 236 | AC_DEFUN([gl_PREREQ_MBRLEN], [
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| 237 | :
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| 238 | ])
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