46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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/*
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* Copyright (c) 1991-1994 by the University of Southern California
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*
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* For copying and distribution information, please see the file
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* <usc-license.h>.
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*/
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#include <usc-license.h>
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#include <stdio.h>
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#include <string.h>
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#include <pmachine.h>
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#include <pfs.h>
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/*
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* sindex - Find first instance of string 2 in string 1
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*
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* SINDEX scans string 1 for the first instance of string
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* 2. If found, SINDEX returns a pointer to the first
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* character of that instance. If no instance is found,
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* SINDEX returns NULL (0).
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*
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* ARGS: s1 - string to be searched
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* s2 - string to be found
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* RETURNS: First instance of s2 in s1, or NULL (0) if not found
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*/
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const char *
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sindex(const char *s1 /* String to be searched */,
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const char *s2 /* String to be found */)
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{
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const char *s = s1; /* Temp pointer to string */
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/* Check for first character of s2 */
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while((s = strchr(s,*s2)) != NULL) {
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if(strncmp(s,s2,strlen(s2)) == 0)
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return(s);
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s++;
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}
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/* We didn't find it */
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return(NULL);
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}
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