30 lines
397 B
C
30 lines
397 B
C
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#include <u.h>
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#include <libc.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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