45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/*
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* The authors of this software are Rob Pike and Ken Thompson.
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* Copyright (c) 2002 by Lucent Technologies.
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* Permission to use, copy, modify, and distribute this software for any
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* purpose without fee is hereby granted, provided that this entire notice
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* is included in all copies of any software which is or includes a copy
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* or modification of this software and in all copies of the supporting
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* documentation for such software.
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
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* ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
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* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
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*/
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#include <stdarg.h>
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#include <string.h>
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#include "plan9.h"
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#include "utf.h"
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/*
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* Return pointer to first occurrence of s2 in s1,
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* 0 if none
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*/
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Rune*
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runestrstr(Rune *s1, Rune *s2)
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{
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Rune *p, *pa, *pb;
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int c0, c;
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c0 = *s2;
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if(c0 == 0)
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return s1;
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s2++;
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for(p=runestrchr(s1, c0); p; p=runestrchr(p+1, c0)) {
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pa = p;
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for(pb=s2;; pb++) {
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c = *pb;
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if(c == 0)
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return p;
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if(c != *++pa)
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break;
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}
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}
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return 0;
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}
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