1 /* 2 * The authors of this software are Rob Pike and Ken Thompson. 3 * Copyright (c) 2002 by Lucent Technologies. 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose without fee is hereby granted, provided that this entire notice 6 * is included in all copies of any software which is or includes a copy 7 * or modification of this software and in all copies of the supporting 8 * documentation for such software. 9 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED 10 * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY 11 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY 12 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. 13 */ 14 #include <stdarg.h> 15 #include <string.h> 16 #include "utf.h" 17 #include "utfdef.h" 18 19 20 /* 21 * Return pointer to first occurrence of s2 in s1, 22 * 0 if none 23 */ 24 const 25 char* 26 utfutf(const char *s1, const char *s2) 27 { 28 const char *p; 29 long f, n1, n2; 30 Rune r; 31 32 n1 = chartorune(&r, s2); 33 f = r; 34 if(f <= Runesync) /* represents self */ 35 return strstr(s1, s2); 36 37 n2 = strlen(s2); 38 for(p=s1; (p=utfrune(p, f)) != 0; p+=n1) 39 if(strncmp(p, s2, n2) == 0) 40 return p; 41 return 0; 42 } 43
