1*37da2899SCharles.Forsyth #include <lib9.h> 2*37da2899SCharles.Forsyth 3*37da2899SCharles.Forsyth /* 4*37da2899SCharles.Forsyth * Return pointer to first occurrence of s2 in s1, 5*37da2899SCharles.Forsyth * 0 if none 6*37da2899SCharles.Forsyth */ 7*37da2899SCharles.Forsyth char* strstr(char * s1,char * s2)8*37da2899SCharles.Forsythstrstr(char *s1, char *s2) 9*37da2899SCharles.Forsyth { 10*37da2899SCharles.Forsyth char *p; 11*37da2899SCharles.Forsyth int f, n; 12*37da2899SCharles.Forsyth 13*37da2899SCharles.Forsyth f = s2[0]; 14*37da2899SCharles.Forsyth if(f == 0) 15*37da2899SCharles.Forsyth return s1; 16*37da2899SCharles.Forsyth n = strlen(s2); 17*37da2899SCharles.Forsyth for(p=strchr(s1, f); p; p=strchr(p+1, f)) 18*37da2899SCharles.Forsyth if(strncmp(p, s2, n) == 0) 19*37da2899SCharles.Forsyth return p; 20*37da2899SCharles.Forsyth return 0; 21*37da2899SCharles.Forsyth } 22