1  /* Copyright (C) 1995-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <wchar.h>
      19  
      20  #ifndef WCSCMP
      21  # define WCSCMP __wcscmp
      22  #endif
      23  
      24  /* Compare S1 and S2, returning less than, equal to or
      25     greater than zero if S1 is lexicographically less than,
      26     equal to or greater than S2.	 */
      27  int
      28  WCSCMP (const wchar_t *s1, const wchar_t *s2)
      29  {
      30    wchar_t c1, c2;
      31  
      32    do
      33      {
      34        c1 = *s1++;
      35        c2 = *s2++;
      36        if (c2 == L'\0')
      37  	return c1 - c2;
      38      }
      39    while (c1 == c2);
      40  
      41    return c1 < c2 ? -1 : 1;
      42  }
      43  libc_hidden_def (WCSCMP)
      44  weak_alias (WCSCMP, wcscmp)