1  /* Test restarting behaviour of wcsrtombs.
       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, srcexp, bufexp) \
      25    {									\
      26      size_t res = expr;							\
      27      printf (#expr " -> %zu", res);					\
      28      dst += res;								\
      29      printf (", src = srcbuf+%td, dst = buf+%td",			\
      30  	    src - srcbuf, dst - (char *) buf);				\
      31      if (res != nexp || src != (srcexp) || dst != (char *) (bufexp))	\
      32        {									\
      33  	printf (", expected %zu and srcbuf+%td and buf+%td", (size_t) nexp, \
      34  		(srcexp) - srcbuf, (bufexp) - (unsigned char *) buf);	\
      35  	result = 1;							\
      36        }									\
      37      putc ('\n', stdout);						\
      38    }
      39  
      40  static int
      41  do_test (void)
      42  {
      43    unsigned char buf[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
      44    const unsigned char bufcheck[6] = { 0x25, 0xe2, 0x82, 0xac, 0xce, 0xbb };
      45    const wchar_t srcbuf[4] = { 0x25, 0x20ac, 0x03bb, 0 };
      46    mbstate_t state;
      47    const wchar_t *src;
      48    char *dst;
      49    int result = 0;
      50    const char *used_locale;
      51  
      52    setlocale (LC_CTYPE, "de_DE.UTF-8");
      53    /* Double check.  */
      54    used_locale = setlocale (LC_CTYPE, NULL);
      55    printf ("used locale: \"%s\"\n", used_locale);
      56    result = strcmp (used_locale, "de_DE.UTF-8");
      57  
      58    memset (&state, '\0', sizeof (state));
      59  
      60    src = srcbuf;
      61    dst = (char *) buf;
      62    show (wcsrtombs (dst, &src, 1, &state), 1, srcbuf + 1, buf + 1);
      63    show (wcsrtombs (dst, &src, 1, &state), 0, srcbuf + 1, buf + 1);
      64    show (wcsrtombs (dst, &src, 4, &state), 3, srcbuf + 2, buf + 4);
      65    show (wcsrtombs (dst, &src, 2, &state), 2, srcbuf + 3, buf + 6);
      66  
      67    if (memcmp (buf, bufcheck, 6))
      68      {
      69        puts ("wrong results");
      70        result = 1;
      71      }
      72  
      73    return result;
      74  }
      75  
      76  #define TEST_FUNCTION do_test ()
      77  #include "../test-skeleton.c"