lib/strsep.c

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