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# mbrlen.m4 serial 9 -*- coding: utf-8 -*-
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dnl Copyright (C) 2008, 2010-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_MBRLEN],
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[
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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AC_REQUIRE([AC_TYPE_MBSTATE_T])
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AC_REQUIRE([gl_FUNC_MBRTOWC])
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AC_CHECK_FUNCS_ONCE([mbrlen])
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if test $ac_cv_func_mbrlen = no; then
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HAVE_MBRLEN=0
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AC_CHECK_DECLS([mbrlen],,, [[
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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included before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>
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]])
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if test $ac_cv_have_decl_mbrlen = yes; then
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dnl On Minix 3.1.8, the system's <wchar.h> declares mbrlen() although
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dnl it does not have the function. Avoid a collision with gnulib's
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dnl replacement.
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REPLACE_MBRLEN=1
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fi
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else
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dnl Most bugs affecting the system's mbrtowc function also affect the
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dnl mbrlen function. So override mbrlen whenever mbrtowc is overridden.
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dnl We could also run the individual tests below; the results would be
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dnl the same.
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if test $REPLACE_MBRTOWC = 1; then
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REPLACE_MBRLEN=1
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fi
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fi
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])
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dnl Test whether mbrlen puts the state into non-initial state when parsing an
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dnl incomplete multibyte character.
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dnl Result is gl_cv_func_mbrlen_incomplete_state.
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AC_DEFUN([gl_MBRLEN_INCOMPLETE_STATE],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([gt_LOCALE_JA])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether mbrlen handles incomplete characters],
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[gl_cv_func_mbrlen_incomplete_state],
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[
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dnl Initial guess, used when cross-compiling or when no suitable locale
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dnl is present.
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changequote(,)dnl
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case "$host_os" in
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# Guess no on AIX and OSF/1.
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aix* | osf*) gl_cv_func_mbrlen_incomplete_state="guessing no" ;;
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# Guess yes otherwise.
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*) gl_cv_func_mbrlen_incomplete_state="guessing yes" ;;
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esac
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changequote([,])dnl
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if test $LOCALE_JA != none; then
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <locale.h>
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#include <string.h>
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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included before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>
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int main ()
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{
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if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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{
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const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
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mbstate_t state;
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memset (&state, '\0', sizeof (mbstate_t));
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if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
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if (mbsinit (&state))
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return 1;
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}
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return 0;
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}]])],
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[gl_cv_func_mbrlen_incomplete_state=yes],
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[gl_cv_func_mbrlen_incomplete_state=no],
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[])
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fi
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])
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])
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dnl Test whether mbrlen, when parsing the end of a multibyte character,
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dnl correctly returns the number of bytes that were needed to complete the
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dnl character (not the total number of bytes of the multibyte character).
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dnl Result is gl_cv_func_mbrlen_retval.
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AC_DEFUN([gl_MBRLEN_RETVAL],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([gt_LOCALE_FR_UTF8])
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AC_REQUIRE([gt_LOCALE_JA])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether mbrlen has a correct return value],
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[gl_cv_func_mbrlen_retval],
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[
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dnl Initial guess, used when cross-compiling or when no suitable locale
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dnl is present.
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changequote(,)dnl
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case "$host_os" in
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# Guess no on HP-UX and Solaris.
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hpux* | solaris*) gl_cv_func_mbrlen_retval="guessing no" ;;
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# Guess yes otherwise.
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*) gl_cv_func_mbrlen_retval="guessing yes" ;;
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esac
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changequote([,])dnl
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if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none; then
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <locale.h>
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#include <string.h>
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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included before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>
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int main ()
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{
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int result = 0;
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/* This fails on Solaris. */
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if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
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{
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char input[] = "B\303\274\303\237er"; /* "Büßer" */
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mbstate_t state;
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memset (&state, '\0', sizeof (mbstate_t));
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if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
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{
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input[1] = '\0';
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if (mbrlen (input + 2, 5, &state) != 1)
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result |= 1;
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}
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}
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/* This fails on HP-UX 11.11. */
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if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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{
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char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
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mbstate_t state;
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memset (&state, '\0', sizeof (mbstate_t));
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if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
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{
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input[1] = '\0';
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if (mbrlen (input + 2, 5, &state) != 2)
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result |= 2;
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}
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}
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return result;
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}]])],
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[gl_cv_func_mbrlen_retval=yes],
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[gl_cv_func_mbrlen_retval=no],
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[])
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fi
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])
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])
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dnl Test whether mbrlen, when parsing a NUL character, correctly returns 0.
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dnl Result is gl_cv_func_mbrlen_nul_retval.
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AC_DEFUN([gl_MBRLEN_NUL_RETVAL],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([gt_LOCALE_ZH_CN])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether mbrlen returns 0 when parsing a NUL character],
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[gl_cv_func_mbrlen_nul_retval],
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[
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dnl Initial guess, used when cross-compiling or when no suitable locale
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dnl is present.
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changequote(,)dnl
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case "$host_os" in
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# Guess no on Solaris 9.
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solaris2.9) gl_cv_func_mbrlen_nul_retval="guessing no" ;;
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# Guess yes otherwise.
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*) gl_cv_func_mbrlen_nul_retval="guessing yes" ;;
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esac
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changequote([,])dnl
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if test $LOCALE_ZH_CN != none; then
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <locale.h>
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#include <string.h>
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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included before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>
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int main ()
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{
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/* This crashes on Solaris 9 inside __mbrtowc_dense_gb18030. */
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if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
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{
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mbstate_t state;
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memset (&state, '\0', sizeof (mbstate_t));
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if (mbrlen ("", 1, &state) != 0)
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return 1;
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}
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return 0;
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}]])],
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[gl_cv_func_mbrlen_nul_retval=yes],
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[gl_cv_func_mbrlen_nul_retval=no],
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[])
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fi
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])
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])
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dnl Test whether mbrlen returns the correct value on empty input.
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AC_DEFUN([gl_MBRLEN_EMPTY_INPUT],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether mbrlen works on empty input],
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[gl_cv_func_mbrlen_empty_input],
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[
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dnl Initial guess, used when cross-compiling or when no suitable locale
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dnl is present.
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changequote(,)dnl
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case "$host_os" in
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# Guess no on AIX and glibc systems.
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aix* | *-gnu*)
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gl_cv_func_mbrlen_empty_input="guessing no" ;;
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*) gl_cv_func_mbrlen_empty_input="guessing yes" ;;
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esac
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changequote([,])dnl
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <wchar.h>
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static mbstate_t mbs;
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int
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main (void)
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{
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return mbrlen ("", 0, &mbs) != (size_t) -2;
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}]])],
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[gl_cv_func_mbrlen_empty_input=yes],
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[gl_cv_func_mbrlen_empty_input=no],
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[:])
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])
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])
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# Prerequisites of lib/mbrlen.c.
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AC_DEFUN([gl_PREREQ_MBRLEN], [
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:
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])
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