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  1. /*
  2. FUNCTION
  3.         <<wcscmp>>---compare two wide-character strings
  4.  
  5. ANSI_SYNOPSIS
  6.         #include <wchar.h>
  7.         int wcscmp(const wchar_t *<[s1]>, *<[s2]>);
  8.  
  9. TRAD_SYNOPSIS
  10.         int wcscmp(<[s1]>, <[s2]>
  11.         const wchar_t *<[s1]>, <[s2]>;
  12.  
  13. DESCRIPTION
  14.         The <<wcscmp>> function compares the wide-character string pointed to
  15.         by <[s1]> to the wide-character string pointed to by <[s2]>.
  16.  
  17.         The sign of a non-zero return value is determined by the sign of the
  18.         difference between the values of the first pair of wide-character codes
  19.         that differ in the objects being compared.
  20.  
  21. RETURNS
  22.         Upon completion, <<wcscmp>> returns an integer greater than, equal to
  23.         or less than 0, if the wide-character string pointed to by <[s1]> is
  24.         greater than, equal to or less than the wide-character string pointed
  25.         to by <[s2]> respectively.
  26.  
  27. PORTABILITY
  28. <<wcscmp>> is ISO/IEC 9899/AMD1:1995 (ISO C).
  29.  
  30. No supporting OS subroutines are required.
  31. */
  32.  
  33. /*      $NetBSD$        */
  34.  
  35. /*-
  36.  * Copyright (c) 1990, 1993
  37.  *      The Regents of the University of California.  All rights reserved.
  38.  *
  39.  * This code is derived from software contributed to Berkeley by
  40.  * Chris Torek.
  41.  *
  42.  * Redistribution and use in source and binary forms, with or without
  43.  * modification, are permitted provided that the following conditions
  44.  * are met:
  45.  * 1. Redistributions of source code must retain the above copyright
  46.  *    notice, this list of conditions and the following disclaimer.
  47.  * 2. Redistributions in binary form must reproduce the above copyright
  48.  *    notice, this list of conditions and the following disclaimer in the
  49.  *    documentation and/or other materials provided with the distribution.
  50.  * 3. Neither the name of the University nor the names of its contributors
  51.  *    may be used to endorse or promote products derived from this software
  52.  *    without specific prior written permission.
  53.  *
  54.  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64.  * SUCH DAMAGE.
  65.  */
  66.  
  67. #include <_ansi.h>
  68. #include <wchar.h>
  69.  
  70. /*
  71.  * Compare strings.
  72.  */
  73. int
  74. _DEFUN (wcscmp, (s1, s2),
  75.         _CONST wchar_t * s1 _AND
  76.         _CONST wchar_t * s2)
  77. {
  78.  
  79.   while (*s1 == *s2++)
  80.     if (*s1++ == 0)
  81.       return (0);
  82.   return (*s1 - *--s2);
  83. }
  84.