1  /* Test restarting behaviour of mbrtowc.
       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) \
      25    n = expr;								  \
      26    printf (#expr " -> %zu", n);						  \
      27    printf (", wc = %lu", (unsigned long int) wc);			  \
      28    if (n != (size_t) nexp || wc != wcexp)				  \
      29      {									  \
      30        printf (", expected %zu and %lu", (size_t) nexp,			  \
      31  	      (unsigned long int) wcexp);				  \
      32        result = 1;							  \
      33      }									  \
      34    putc ('\n', stdout)
      35  
      36  static int
      37  do_test (void)
      38  {
      39    const unsigned char buf[6] = { 0x25,  0xe2, 0x82, 0xac,  0xce, 0xbb };
      40    mbstate_t state;
      41    wchar_t wc = 42;
      42    size_t n;
      43    int result = 0;
      44    const char *used_locale;
      45  
      46    setlocale (LC_CTYPE, "de_DE.UTF-8");
      47    /* Double check.  */
      48    used_locale = setlocale (LC_CTYPE, NULL);
      49    printf ("used locale: \"%s\"\n", used_locale);
      50    result = strcmp (used_locale, "de_DE.UTF-8");
      51  
      52    memset (&state, '\0', sizeof (state));
      53  
      54    show (mbrtowc (&wc, (const char *) buf + 0, 1, &state), 1, 37);
      55    show (mbrtowc (&wc, (const char *) buf + 1, 1, &state), -2, 37);
      56    show (mbrtowc (&wc, (const char *) buf + 2, 3, &state), 2, 8364);
      57    show (mbrtowc (&wc, (const char *) buf + 4, 1, &state), -2, 8364);
      58    show (mbrtowc (&wc, (const char *) buf + 5, 1, &state), 1, 955);
      59    show (mbrtowc (&wc, (const char *) buf + 5, 1, &state), -1, 955);
      60  
      61    return result;
      62  }
      63  
      64  #define TEST_FUNCTION do_test ()
      65  #include "../test-skeleton.c"