kc3-lang/gnulib/m4/mbsnrtowcs.m4

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• m4/mbsnrtowcs.m4

• # mbsnrtowcs.m4 serial 6
  dnl Copyright (C) 2008, 2010-2023 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_MBSNRTOWCS],
  [
    AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
  
    dnl Persuade glibc <wchar.h> to declare mbsnrtowcs().
    AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  
    AC_REQUIRE([AC_TYPE_MBSTATE_T])
    gl_MBSTATE_T_BROKEN
  
    AC_CHECK_FUNCS_ONCE([mbsnrtowcs])
    if test $ac_cv_func_mbsnrtowcs = no; then
      HAVE_MBSNRTOWCS=0
    else
      if test $REPLACE_MBSTATE_T = 1; then
        REPLACE_MBSNRTOWCS=1
      else
        gl_MBSNRTOWCS_WORKS_IN_TRADITIONAL_LOCALE
        case "$gl_cv_func_mbsnrtowcs_works_in_traditional_locale" in
          *yes) ;;
          *) REPLACE_MBSNRTOWCS=1 ;;
        esac
      fi
    fi
  ])
  
  # Prerequisites of lib/mbsnrtowcs.c.
  AC_DEFUN([gl_PREREQ_MBSNRTOWCS], [
    :
  ])
  
  dnl Test whether mbsnrtowcs works in an ISO-8859-1 locale.
  dnl Result is gl_cv_func_mbsnrtowcs_works_in_traditional_locale.
  
  AC_DEFUN([gl_MBSNRTOWCS_WORKS_IN_TRADITIONAL_LOCALE],
  [
    AC_REQUIRE([AC_PROG_CC])
    AC_REQUIRE([gt_LOCALE_FR])
    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
    AC_CACHE_CHECK([whether mbsnrtowcs works in a traditional locale],
      [gl_cv_func_mbsnrtowcs_works_in_traditional_locale],
      [
        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.
          solaris*) gl_cv_func_mbsnrtowcs_works_in_traditional_locale="guessing no" ;;
                    # Guess yes otherwise.
          *)        gl_cv_func_mbsnrtowcs_works_in_traditional_locale="guessing yes" ;;
        esac
  changequote([,])dnl
        if test $LOCALE_FR != none; then
          AC_RUN_IFELSE(
            [AC_LANG_SOURCE([[
  #include <locale.h>
  #include <stdlib.h>
  #include <string.h>
  #include <wchar.h>
  int main ()
  {
    /* This fails on Solaris 11.4:
       mbsnrtowcs stores a wrong wide character: 0xDF instead of btowc (0xDF).  */
    if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
      {
        /* Locale encoding is ISO-8859-1 or ISO-8859-15.  */
        char input[] = "B\374\337er"; /* "Büßer" */
        mbstate_t state;
        mbstate_t temp_state;
        wchar_t wc;
        size_t ret;
        const char *src;
  
        #define BUFSIZE 10
        wchar_t buf[BUFSIZE];
        {
          size_t i;
          for (i = 0; i < BUFSIZE; i++)
            buf[i] = (wchar_t) 0xBADFACE;
        }
  
        memset (&state, '\0', sizeof (mbstate_t));
  
        wc = (wchar_t) 0xBADFACE;
        ret = mbrtowc (&wc, input, 1, &state);
        if (!(ret == 1 && wc == 'B' && mbsinit (&state)))
          return 1;
        input[0] = '\0';
  
        wc = (wchar_t) 0xBADFACE;
        ret = mbrtowc (&wc, input + 1, 1, &state);
        if (!(ret == 1 && wctob (wc) == (unsigned char) '\374' && mbsinit (&state)))
          return 2;
        input[1] = '\0';
  
        src = input + 2;
        temp_state = state;
        ret = mbsnrtowcs (NULL, &src, 4, 1, &temp_state);
        if (!(ret == 3 && src == input + 2 && mbsinit (&state)))
          return 3;
  
        src = input + 2;
        ret = mbsnrtowcs (buf, &src, 4, 1, &state);
        if (!(ret == 1))
          return 4;
        if (!(src == input + 3))
          return 5;
        if (!(buf[0] == btowc ((unsigned char) '\337')))
          return 6;
      }
    return 0;
  }]])],
            [gl_cv_func_mbsnrtowcs_works_in_traditional_locale=yes],
            [gl_cv_func_mbsnrtowcs_works_in_traditional_locale=no],
            [:])
        fi
      ])
  ])
  

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