1 #include <u.h> 2 #include <libc.h> 3 4 5 /* 6 * Return pointer to first occurrence of s2 in s1, 7 * 0 if none 8 */ 9 char* utfutf(char * s1,char * s2)10utfutf(char *s1, char *s2) 11 { 12 char *p; 13 long f, n1, n2; 14 Rune r; 15 16 n1 = chartorune(&r, s2); 17 f = r; 18 if(f <= Runesync) /* represents self */ 19 return strstr(s1, s2); 20 21 n2 = strlen(s2); 22 for(p=s1; (p=utfrune(p, f)); p+=n1) 23 if(strncmp(p, s2, n2) == 0) 24 return p; 25 return 0; 26 } 27