/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>  /* * Return pointer to first occurrence of s2 in s1, * 0 if none */char*utfutf(char *s1, char *s2){	char *p;	long f, n1, n2;	Rune r; 	n1 = chartorune(&r, s2);	f = r;	if(f <= Runesync)		/* represents self */		return strstr(s1, s2); 	n2 = strlen(s2);	for(p=s1; p=utfrune(p, f); p+=n1)		if(strncmp(p, s2, n2) == 0)			return p;	return 0;}