# mbsrtowcs.m4 serial 13

dnl Copyright (C) 2008-2018 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_MBSRTOWCS],

[

  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])

  AC_REQUIRE([AC_TYPE_MBSTATE_T])

  gl_MBSTATE_T_BROKEN

  AC_CHECK_FUNCS_ONCE([mbsrtowcs])

  if test $ac_cv_func_mbsrtowcs = no; then

    HAVE_MBSRTOWCS=0

    AC_CHECK_DECLS([mbsrtowcs],,, [[

/* 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_mbsrtowcs = yes; then

      dnl On Minix 3.1.8, the system's <wchar.h> declares mbsrtowcs() although

      dnl it does not have the function. Avoid a collision with gnulib's

      dnl replacement.

      REPLACE_MBSRTOWCS=1

    fi

  else

    if test $REPLACE_MBSTATE_T = 1; then

      REPLACE_MBSRTOWCS=1

    else

      gl_MBSRTOWCS_WORKS

      case "$gl_cv_func_mbsrtowcs_works" in

        *yes) ;;

        *) REPLACE_MBSRTOWCS=1 ;;

      esac

    fi

  fi

])

dnl Test whether mbsrtowcs works.

dnl Result is gl_cv_func_mbsrtowcs_works.

AC_DEFUN([gl_MBSRTOWCS_WORKS],

[

  AC_REQUIRE([AC_PROG_CC])

  AC_REQUIRE([gt_LOCALE_FR])

  AC_REQUIRE([gt_LOCALE_FR_UTF8])

  AC_REQUIRE([gt_LOCALE_JA])

  AC_REQUIRE([gt_LOCALE_ZH_CN])

  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

  AC_CACHE_CHECK([whether mbsrtowcs works],

    [gl_cv_func_mbsrtowcs_works],

    [

      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, Solaris, mingw.

        hpux* | solaris* | mingw*) gl_cv_func_mbsrtowcs_works="guessing no" ;;

                                   # Guess yes otherwise.

        *)                         gl_cv_func_mbsrtowcs_works="guessing yes" ;;

      esac

changequote([,])dnl

      if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || 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 ()

{

  int result = 0;

  /* Test whether the function supports a NULL destination argument.

     This fails on native Windows.  */

  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)

    {

      const char input[] = "\337er";

      const char *src = input;

      mbstate_t state;

      memset (&state, '\0', sizeof (mbstate_t));

      if (mbsrtowcs (NULL, &src, 1, &state) != 3

          || src != input)

        result |= 1;

    }

  /* Test whether the function works when started with a conversion state

     in non-initial state.  This fails on HP-UX 11.11 and Solaris 10.  */

  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)

    {

      const char input[] = "B\303\274\303\237er";

      mbstate_t state;

      memset (&state, '\0', sizeof (mbstate_t));

      if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))

        if (!mbsinit (&state))

          {

            const char *src = input + 2;

            if (mbsrtowcs (NULL, &src, 10, &state) != 4)

              result |= 2;

          }

    }

  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)

    {

      const char input[] = "<\306\374\313\334\270\354>";

      mbstate_t state;

      memset (&state, '\0', sizeof (mbstate_t));

      if (mbrtowc (NULL, input + 3, 1, &state) == (size_t)(-2))

        if (!mbsinit (&state))

          {

            const char *src = input + 4;

            if (mbsrtowcs (NULL, &src, 10, &state) != 3)

              result |= 4;

          }

    }

  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)

    {

      const char input[] = "B\250\271\201\060\211\070er";

      mbstate_t state;

      memset (&state, '\0', sizeof (mbstate_t));

      if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))

        if (!mbsinit (&state))

          {

            const char *src = input + 2;

            if (mbsrtowcs (NULL, &src, 10, &state) != 4)

              result |= 8;

          }

    }

  return result;

}]])],

          [gl_cv_func_mbsrtowcs_works=yes],

          [gl_cv_func_mbsrtowcs_works=no],

          [:])

      fi

    ])

])

# Prerequisites of lib/mbsrtowcs.c.

AC_DEFUN([gl_PREREQ_MBSRTOWCS], [

  :

])