1  /* Test restarting behaviour of mbsrtowcs.
       2     Copyright (C) 2000-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <stdio.h>
      20  #include <string.h>
      21  #include <wchar.h>
      22  #include <locale.h>
      23  
      24  #define show(expr, nexp, wcexp, end) \
      25    n = expr;								\
      26    printf (#expr " -> %zu", n);						\
      27    printf (", wc = %lu, src = buf+%td", (unsigned long int) wc,		\
      28  	  src - (const char *) buf);					\
      29    if (n != (size_t) nexp || wc != wcexp || src != (const char *) (end))	\
      30      {									\
      31        printf (", expected %zu and %lu and buf+%td", (size_t) nexp,	\
      32  	      (unsigned long int) wcexp, (end) - buf);			\
      33        result = 1;							\
      34      }									\
      35    putc ('\n', stdout)
      36  
      37  static int
      38  do_test (void)
      39  {
      40    unsigned char buf[6] = { 0x25,  0xe2, 0x82, 0xac,  0xce, 0xbb };
      41    mbstate_t state;
      42    const char *src;
      43    wchar_t wc = 42;
      44    size_t n;
      45    int result = 0;
      46    const char *used_locale;
      47  
      48    setlocale (LC_CTYPE,"de_DE.UTF-8");
      49    /* Double check.  */
      50    used_locale = setlocale (LC_CTYPE, NULL);
      51    printf ("used locale: \"%s\"\n", used_locale);
      52    result = strcmp (used_locale, "de_DE.UTF-8");
      53  
      54    memset (&state, '\0', sizeof (state));
      55  
      56    src = (const char *) buf;
      57    show (mbsrtowcs (&wc, &src, 1, &state), 1, 37, buf + 1);
      58    show (mbsrtowcs (&wc, &src, 1, &state), 1, 8364, buf + 4);
      59    show (mbsrtowcs (&wc, &src, 1, &state), 1, 955, buf + 6);
      60  
      61    return result;
      62  }
      63  
      64  #define TEST_FUNCTION do_test ()
      65  #include "../test-skeleton.c"