m4/mbrlen.m4 - toolchain/sed - Git at Google

 # mbrlen.m4 serial 8
 dnl Copyright (C) 2008, 2010-2012 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_MBRLEN],
 [
   AC_REQUIRE([gl_WCHAR_H_DEFAULTS])

   AC_REQUIRE([AC_TYPE_MBSTATE_T])
   AC_REQUIRE([gl_FUNC_MBRTOWC])
   AC_CHECK_FUNCS_ONCE([mbrlen])
   if test $ac_cv_func_mbrlen = no; then
     HAVE_MBRLEN=0
     AC_CHECK_DECLS([mbrlen],,, [[
 /* 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>
 ]])
     if test $ac_cv_have_decl_mbrlen = yes; then
       dnl On Minix 3.1.8, the system's <wchar.h> declares mbrlen() although
       dnl it does not have the function. Avoid a collision with gnulib's
       dnl replacement.
       REPLACE_MBRLEN=1
     fi
   else
     dnl Most bugs affecting the system's mbrtowc function also affect the
     dnl mbrlen function. So override mbrlen whenever mbrtowc is overridden.
     dnl We could also run the individual tests below; the results would be
     dnl the same.
     if test $REPLACE_MBRTOWC = 1; then
       REPLACE_MBRLEN=1
     fi
   fi
 ])

 dnl Test whether mbrlen puts the state into non-initial state when parsing an
 dnl incomplete multibyte character.
 dnl Result is gl_cv_func_mbrlen_incomplete_state.

 AC_DEFUN([gl_MBRLEN_INCOMPLETE_STATE],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([gt_LOCALE_JA])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CACHE_CHECK([whether mbrlen handles incomplete characters],
     [gl_cv_func_mbrlen_incomplete_state],
     [
       dnl Initial guess, used when cross-compiling or when no suitable locale
       dnl is present.
 changequote(,)dnl
       case "$host_os" in
                      # Guess no on AIX and OSF/1.
         aix* | osf*) gl_cv_func_mbrlen_incomplete_state="guessing no" ;;
                      # Guess yes otherwise.
         *)           gl_cv_func_mbrlen_incomplete_state="guessing yes" ;;
       esac
 changequote([,])dnl
       if test $LOCALE_JA != none; then
         AC_RUN_IFELSE(
           [AC_LANG_SOURCE([[
 #include <locale.h>
 #include <string.h>
 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
    <wchar.h>.
    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
    included before <wchar.h>.  */
 #include <stddef.h>
 #include <stdio.h>
 #include <time.h>
 #include <wchar.h>
 int main ()
 {
   if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
     {
       const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
       mbstate_t state;

       memset (&state, '\0', sizeof (mbstate_t));
       if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
         if (mbsinit (&state))
           return 1;
     }
   return 0;
 }]])],
           [gl_cv_func_mbrlen_incomplete_state=yes],
           [gl_cv_func_mbrlen_incomplete_state=no],
           [])
       fi
     ])
 ])

 dnl Test whether mbrlen, when parsing the end of a multibyte character,
 dnl correctly returns the number of bytes that were needed to complete the
 dnl character (not the total number of bytes of the multibyte character).
 dnl Result is gl_cv_func_mbrlen_retval.

 AC_DEFUN([gl_MBRLEN_RETVAL],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([gt_LOCALE_FR_UTF8])
   AC_REQUIRE([gt_LOCALE_JA])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CACHE_CHECK([whether mbrlen has a correct return value],
     [gl_cv_func_mbrlen_retval],
     [
       dnl Initial guess, used when cross-compiling or when no suitable locale
       dnl is present.
 changequote(,)dnl
       case "$host_os" in
                           # Guess no on HP-UX and Solaris.
         hpux* | solaris*) gl_cv_func_mbrlen_retval="guessing no" ;;
                           # Guess yes otherwise.
         *)                gl_cv_func_mbrlen_retval="guessing yes" ;;
       esac
 changequote([,])dnl
       if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none; then
         AC_RUN_IFELSE(
           [AC_LANG_SOURCE([[
 #include <locale.h>
 #include <string.h>
 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
    <wchar.h>.
    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
    included before <wchar.h>.  */
 #include <stddef.h>
 #include <stdio.h>
 #include <time.h>
 #include <wchar.h>
 int main ()
 {
   int result = 0;
   /* This fails on Solaris.  */
   if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
     {
       char input[] = "B\303\274\303\237er"; /* "Büßer" */
       mbstate_t state;

       memset (&state, '\0', sizeof (mbstate_t));
       if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
         {
           input[1] = '\0';
           if (mbrlen (input + 2, 5, &state) != 1)
             result |= 1;
         }
     }
   /* This fails on HP-UX 11.11.  */
   if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
     {
       char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
       mbstate_t state;

       memset (&state, '\0', sizeof (mbstate_t));
       if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
         {
           input[1] = '\0';
           if (mbrlen (input + 2, 5, &state) != 2)
             result |= 2;
         }
     }
   return result;
 }]])],
           [gl_cv_func_mbrlen_retval=yes],
           [gl_cv_func_mbrlen_retval=no],
           [])
       fi
     ])
 ])

 dnl Test whether mbrlen, when parsing a NUL character, correctly returns 0.
 dnl Result is gl_cv_func_mbrlen_nul_retval.

 AC_DEFUN([gl_MBRLEN_NUL_RETVAL],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([gt_LOCALE_ZH_CN])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   AC_CACHE_CHECK([whether mbrlen returns 0 when parsing a NUL character],
     [gl_cv_func_mbrlen_nul_retval],
     [
       dnl Initial guess, used when cross-compiling or when no suitable locale
       dnl is present.
 changequote(,)dnl
       case "$host_os" in
                     # Guess no on Solaris 9.
         solaris2.9) gl_cv_func_mbrlen_nul_retval="guessing no" ;;
                     # Guess yes otherwise.
         *)          gl_cv_func_mbrlen_nul_retval="guessing yes" ;;
       esac
 changequote([,])dnl
       if test $LOCALE_ZH_CN != none; then
         AC_RUN_IFELSE(
           [AC_LANG_SOURCE([[
 #include <locale.h>
 #include <string.h>
 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
    <wchar.h>.
    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
    included before <wchar.h>.  */
 #include <stddef.h>
 #include <stdio.h>
 #include <time.h>
 #include <wchar.h>
 int main ()
 {
   /* This crashes on Solaris 9 inside __mbrtowc_dense_gb18030.  */
   if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
     {
       mbstate_t state;

       memset (&state, '\0', sizeof (mbstate_t));
       if (mbrlen ("", 1, &state) != 0)
         return 1;
     }
   return 0;
 }]])],
           [gl_cv_func_mbrlen_nul_retval=yes],
           [gl_cv_func_mbrlen_nul_retval=no],
           [])
       fi
     ])
 ])

 # Prerequisites of lib/mbrlen.c.
 AC_DEFUN([gl_PREREQ_MBRLEN], [
   :
 ])
	# mbrlen.m4 serial 8
	dnl Copyright (C) 2008, 2010-2012 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_MBRLEN],
	[
	AC_REQUIRE([gl_WCHAR_H_DEFAULTS])

	AC_REQUIRE([AC_TYPE_MBSTATE_T])
	AC_REQUIRE([gl_FUNC_MBRTOWC])
	AC_CHECK_FUNCS_ONCE([mbrlen])
	if test $ac_cv_func_mbrlen = no; then
	HAVE_MBRLEN=0
	AC_CHECK_DECLS([mbrlen],,, [[
	/* 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>
	]])
	if test $ac_cv_have_decl_mbrlen = yes; then
	dnl On Minix 3.1.8, the system's <wchar.h> declares mbrlen() although
	dnl it does not have the function. Avoid a collision with gnulib's
	dnl replacement.
	REPLACE_MBRLEN=1
	fi
	else
	dnl Most bugs affecting the system's mbrtowc function also affect the
	dnl mbrlen function. So override mbrlen whenever mbrtowc is overridden.
	dnl We could also run the individual tests below; the results would be
	dnl the same.
	if test $REPLACE_MBRTOWC = 1; then
	REPLACE_MBRLEN=1
	fi
	fi
	])

	dnl Test whether mbrlen puts the state into non-initial state when parsing an
	dnl incomplete multibyte character.
	dnl Result is gl_cv_func_mbrlen_incomplete_state.

	AC_DEFUN([gl_MBRLEN_INCOMPLETE_STATE],
	[
	AC_REQUIRE([AC_PROG_CC])
	AC_REQUIRE([gt_LOCALE_JA])
	AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
	AC_CACHE_CHECK([whether mbrlen handles incomplete characters],
	[gl_cv_func_mbrlen_incomplete_state],
	[
	dnl Initial guess, used when cross-compiling or when no suitable locale
	dnl is present.
	changequote(,)dnl
	case "$host_os" in
	# Guess no on AIX and OSF/1.
	aix* \| osf*) gl_cv_func_mbrlen_incomplete_state="guessing no" ;;
	# Guess yes otherwise.
	*) gl_cv_func_mbrlen_incomplete_state="guessing yes" ;;
	esac
	changequote([,])dnl
	if test $LOCALE_JA != none; then
	AC_RUN_IFELSE(
	[AC_LANG_SOURCE([[
	#include <locale.h>
	#include <string.h>
	/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
	<wchar.h>.
	BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
	included before <wchar.h>. */
	#include <stddef.h>
	#include <stdio.h>
	#include <time.h>
	#include <wchar.h>
	int main ()
	{
	if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
	{
	const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
	mbstate_t state;

	memset (&state, '\0', sizeof (mbstate_t));
	if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
	if (mbsinit (&state))
	return 1;
	}
	return 0;
	}]])],
	[gl_cv_func_mbrlen_incomplete_state=yes],
	[gl_cv_func_mbrlen_incomplete_state=no],
	[])
	fi
	])
	])

	dnl Test whether mbrlen, when parsing the end of a multibyte character,
	dnl correctly returns the number of bytes that were needed to complete the
	dnl character (not the total number of bytes of the multibyte character).
	dnl Result is gl_cv_func_mbrlen_retval.

	AC_DEFUN([gl_MBRLEN_RETVAL],
	[
	AC_REQUIRE([AC_PROG_CC])
	AC_REQUIRE([gt_LOCALE_FR_UTF8])
	AC_REQUIRE([gt_LOCALE_JA])
	AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
	AC_CACHE_CHECK([whether mbrlen has a correct return value],
	[gl_cv_func_mbrlen_retval],
	[
	dnl Initial guess, used when cross-compiling or when no suitable locale
	dnl is present.
	changequote(,)dnl
	case "$host_os" in
	# Guess no on HP-UX and Solaris.
	hpux* \| solaris*) gl_cv_func_mbrlen_retval="guessing no" ;;
	# Guess yes otherwise.
	*) gl_cv_func_mbrlen_retval="guessing yes" ;;
	esac
	changequote([,])dnl
	if test $LOCALE_FR_UTF8 != none \|\| test $LOCALE_JA != none; then
	AC_RUN_IFELSE(
	[AC_LANG_SOURCE([[
	#include <locale.h>
	#include <string.h>
	/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
	<wchar.h>.
	BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
	included before <wchar.h>. */
	#include <stddef.h>
	#include <stdio.h>
	#include <time.h>
	#include <wchar.h>
	int main ()
	{
	int result = 0;
	/* This fails on Solaris. */
	if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
	{
	char input[] = "B\303\274\303\237er"; /* "Büßer" */
	mbstate_t state;

	memset (&state, '\0', sizeof (mbstate_t));
	if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
	{
	input[1] = '\0';
	if (mbrlen (input + 2, 5, &state) != 1)
	result \|= 1;
	}
	}
	/* This fails on HP-UX 11.11. */
	if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
	{
	char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
	mbstate_t state;

	memset (&state, '\0', sizeof (mbstate_t));
	if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
	{
	input[1] = '\0';
	if (mbrlen (input + 2, 5, &state) != 2)
	result \|= 2;
	}
	}
	return result;
	}]])],
	[gl_cv_func_mbrlen_retval=yes],
	[gl_cv_func_mbrlen_retval=no],
	[])
	fi
	])
	])

	dnl Test whether mbrlen, when parsing a NUL character, correctly returns 0.
	dnl Result is gl_cv_func_mbrlen_nul_retval.

	AC_DEFUN([gl_MBRLEN_NUL_RETVAL],
	[
	AC_REQUIRE([AC_PROG_CC])
	AC_REQUIRE([gt_LOCALE_ZH_CN])
	AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
	AC_CACHE_CHECK([whether mbrlen returns 0 when parsing a NUL character],
	[gl_cv_func_mbrlen_nul_retval],
	[
	dnl Initial guess, used when cross-compiling or when no suitable locale
	dnl is present.
	changequote(,)dnl
	case "$host_os" in
	# Guess no on Solaris 9.
	solaris2.9) gl_cv_func_mbrlen_nul_retval="guessing no" ;;
	# Guess yes otherwise.
	*) gl_cv_func_mbrlen_nul_retval="guessing yes" ;;
	esac
	changequote([,])dnl
	if test $LOCALE_ZH_CN != none; then
	AC_RUN_IFELSE(
	[AC_LANG_SOURCE([[
	#include <locale.h>
	#include <string.h>
	/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
	<wchar.h>.
	BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
	included before <wchar.h>. */
	#include <stddef.h>
	#include <stdio.h>
	#include <time.h>
	#include <wchar.h>
	int main ()
	{
	/* This crashes on Solaris 9 inside __mbrtowc_dense_gb18030. */
	if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
	{
	mbstate_t state;

	memset (&state, '\0', sizeof (mbstate_t));
	if (mbrlen ("", 1, &state) != 0)
	return 1;
	}
	return 0;
	}]])],
	[gl_cv_func_mbrlen_nul_retval=yes],
	[gl_cv_func_mbrlen_nul_retval=no],
	[])
	fi
	])
	])

	# Prerequisites of lib/mbrlen.c.
	AC_DEFUN([gl_PREREQ_MBRLEN], [
	:
	])