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/*
* Copyright (c) 1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND CARNEGIE MELLON UNIVERSITY
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT
* SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Users of this software agree to return to Carnegie Mellon any
* improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* Export of this software is permitted only after complying with the
* regulations of the U.S. Deptartment of Commerce relating to the
* Export of Technical Data.
*/
/* sindex -- find index of one string within another
*
* Usage: p = sindex (big,small)
* char *p,*big,*small;
*
* Sindex searches for a substring of big which matches small,
* and returns a pointer to this substring. If no matching
* substring is found, 0 is returned.
*
* HISTORY
* $Log: sindex.c,v $
* Revision 1.2 90/12/11 17:58:59 mja
* Add copyright/disclaimer for distribution.
*
* 26-Jun-81 David Smith (drs) at Carnegie-Mellon University
* Rewritten to avoid call on strlen(), and generally speed up things.
*
* 20-Nov-79 Steven Shafer (sas) at Carnegie-Mellon University
* Adapted for VAX from indexs() on the PDP-11 (thanx to Ralph
* Guggenheim). The name has changed to be more like the index()
* and rindex() functions from Bell Labs; the return value (pointer
* rather than integer) has changed partly for the same reason,
* and partly due to popular usage of this function.
*
* Originally from rjg (Ralph Guggenheim) on IUS/SUS UNIX.
*/
char *sindex (big,small) char *big,*small;
{
register char *bp, *bp1, *sp;
register char c = *small++;
if (c==0) return(0);
for (bp=big; *bp; bp++)
if (*bp == c)
{
for (sp=small,bp1=bp+1; *sp && *sp == *bp1++; sp++)
;
if (*sp==0) return(bp);
}
return 0;
}
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