strncasecmp.c
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上传日期:2013-06-12
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文件大小:2k
- /*
- * Copyright (C) 1999 Ross Combs (rocombs@cs.nmsu.edu)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include "common/setup_before.h"
- #ifndef HAVE_STRCASECMP
- #include <ctype.h>
- #ifdef HAVE_STRING_H
- # include <string.h>
- #else
- # ifdef HAVE_STRINGS_H
- # include <strings.h>
- # endif
- #endif
- #include "strncasecmp.h"
- #include "common/setup_after.h"
- extern int strncasecmp(char const * str1, char const * str2, unsigned int cnt)
- {
- unsigned int i;
- int a;
- int b;
-
- if (!str1 || !str2)
- return -1;
-
- /* some versions of tolower() break when given already lowercase characters */
- for (i=0; i<cnt && str1[i]!=' ' && str2[i]!=' '; i++)
- {
- if (isupper((int)str1[i]))
- a = (int)tolower((int)str1[i]);
- else
- a = (int)str1[i];
-
- if (isupper((int)str2[i]))
- b = (int)tolower((int)str2[i]);
- else
- b = (int)str2[i];
-
- if (a<b)
- return -1;
- if (a>b)
- return +1;
- }
-
- if (i<cnt && str1[i]!=' ')
- return -1;
- if (i<cnt && str2[i]!=' ')
- return +1;
-
- return 0;
- }
- #else
- typedef int filenotempty; /* make ISO standard happy */
- #endif