1 #include <stdio.h> 2 strsep(char ** stringp,const char * delim)3char *strsep(char **stringp, const char *delim) 4 { 5 char *s, *tok; 6 const char *spanp; 7 int c, sc; 8 9 s = *stringp; 10 if (!s) 11 return NULL; 12 13 tok = s; 14 do { 15 c = *s++; 16 spanp = delim; 17 do { 18 sc = *spanp++; 19 if (sc == c) { 20 if (c == 0) 21 s = NULL; 22 else 23 s[-1] = 0; 24 *stringp = s; 25 return tok; 26 } 27 } while (sc != 0); 28 } while (1); 29 } 30