strstr.c
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上传日期:2022-05-23
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- /* Copyright (C) 2002 MySQL AB
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA */
- /* File : strstr.c
- Author : Monty
- Updated: 1986.11.24
- Defines: strstr()
- strstr(src, pat) looks for an instance of pat in src. pat is not a
- regex(3) pattern, it is a literal string which must be matched exactly.
- The result is a pointer to the first character of the located instance,
- or NullS if pat does not occur in src.
- */
- #include <my_global.h>
- #include "m_string.h"
- #ifndef HAVE_STRSTR
- char *strstr(register const char *str,const char *search)
- {
- register char *i,*j;
- register char first= *search;
- skip:
- while (*str != ' ') {
- if (*str++ == first) {
- i=(char*) str; j=(char*) search+1;
- while (*j)
- if (*i++ != *j++) goto skip;
- return ((char*) str-1);
- }
- }
- return ((char*) 0);
- } /* strstr */
- #endif