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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [string/] [strstr.c] - Rev 40
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/* FUNCTION <<strstr>>---find string segment INDEX strstr ANSI_SYNOPSIS #include <string.h> char *strstr(const char *<[s1]>, const char *<[s2]>); TRAD_SYNOPSIS #include <string.h> char *strstr(<[s1]>, <[s2]>) char *<[s1]>; char *<[s2]>; DESCRIPTION Locates the first occurence in the string pointed to by <[s1]> of the sequence of characters in the string pointed to by <[s2]> (excluding the terminating null character). RETURNS Returns a pointer to the located string segment, or a null pointer if the string <[s2]> is not found. If <[s2]> points to a string with zero length, the <[s1]> is returned. PORTABILITY <<strstr>> is ANSI C. <<strstr>> requires no supporting OS subroutines. QUICKREF strstr ansi pure */ #include <string.h> char * _DEFUN (strstr, (searchee, lookfor), _CONST char *searchee _AND _CONST char *lookfor) { if (*searchee == 0) { if (*lookfor) return (char *) NULL; return (char *) searchee; } while (*searchee) { size_t i; i = 0; while (1) { if (lookfor[i] == 0) { return (char *) searchee; } if (lookfor[i] != searchee[i]) { break; } i++; } searchee++; } return (char *) NULL; }
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