1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
  25  */
  26 
  27 /*
  28  * Compare strings ignoring case difference.
  29  *      returns:  s1>s2: >0  s1==s2: 0  s1<s2: <0
  30  * All letters are converted to the lowercase and compared.
  31  */
  32 
  33 #include "lint.h"
  34 #include <stdlib.h>
  35 #include <wchar.h>
  36 #include <locale.h>
  37 #include "libc.h"
  38 
  39 /* Legacy Sun interfaces */
  40 #pragma weak wscasecmp = wcscasecmp
  41 #pragma weak wsncasecmp = wcsncasecmp
  42 
  43 int
  44 wcscasecmp_l(const wchar_t *s1, const wchar_t *s2, locale_t loc)
  45 {
  46         if (s1 == s2)
  47                 return (0);
  48 
  49         while (towlower_l(*s1, loc) == towlower_l(*s2, loc)) {
  50                 if (*s1 == 0)
  51                         return (0);
  52                 s1++;
  53                 s2++;
  54         }
  55         return (towlower_l(*s1, loc) - towlower_l(*s2, loc));
  56 }
  57 
  58 int
  59 wcscasecmp(const wchar_t *s1, const wchar_t *s2)
  60 {
  61         return (wcscasecmp_l(s1, s2, uselocale(NULL)));
  62 }
  63 
  64 int
  65 wcsncasecmp_l(const wchar_t *s1, const wchar_t *s2, size_t n, locale_t loc)
  66 {
  67         if (s1 == s2)
  68                 return (0);
  69 
  70         while ((towlower_l(*s1, loc) == towlower_l(*s2, loc)) && n--) {
  71                 if (*s1 == 0)
  72                         return (0);
  73                 s1++;
  74                 s2++;
  75         }
  76         return (towlower_l(*s1, loc) - towlower_l(*s2, loc));
  77 }
  78 
  79 int
  80 wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
  81 {
  82         return (wcsncasecmp_l(s1, s2, n, uselocale(NULL)));
  83 }