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[/] [or1k/] [branches/] [oc/] [gdb-5.0/] [libiberty/] [strstr.c] - Blame information for rev 106

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1 106 markom
/* Simple implementation of strstr for systems without it.
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   This function is in the public domain.  */
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/*
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NAME
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        strstr -- locate first occurance of a substring
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SYNOPSIS
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        #include <string.h>
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        char *strstr (char *s1, char *s2)
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DESCRIPTION
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        Locates the first occurance in the string pointed to by S1 of
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        the string pointed to by S2.  Returns a pointer to the substring
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        found, or a NULL pointer if not found.  If S2 points to a string
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        with zero length, the function returns S1.
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BUGS
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*/
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/* FIXME:  The above description is ANSI compiliant.  This routine has not
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   been validated to comply with it.  -fnf */
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char *
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strstr (s1, s2)
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  char *s1, *s2;
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{
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  register char *p = s1;
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  extern char *strchr ();
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  extern int strncmp ();
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#if __GNUC__==2
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  extern __SIZE_TYPE__ strlen ();
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#endif
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  register int len = strlen (s2);
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  for (; (p = strchr (p, *s2)) != 0; p++)
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    {
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      if (strncmp (p, s2, len) == 0)
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        {
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          return (p);
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        }
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    }
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  return (0);
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}

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