strstr.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:1k
- /* 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 <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;
- skipp:
- while (*str != ' ') {
- if (*str++ == first) {
- i=(char*) str; j=(char*) search+1;
- while (*j)
- if (*i++ != *j++) goto skipp;
- return ((char*) str-1);
- }
- }
- return ((char*) 0);
- } /* strstr */
- #endif