/* * The authors of this software are Rob Pike and Ken Thompson. *              Copyright (c) 2002 by Lucent Technologies. * Permission to use, copy, modify, and distribute this software for any * purpose without fee is hereby granted, provided that this entire notice * is included in all copies of any software which is or includes a copy * or modification of this software and in all copies of the supporting * documentation for such software. * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. */#include <stdarg.h>#include <string.h>#include "utf.h"#include "utfdef.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;}