lib/strsep.c

   1 #include <stdio.h>
   2
   3 char *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 }