src/system/libroot/posix/string/strtok.c

   1 /*
   2 ** Copyright 2001, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5
   6
   7 #include <sys/types.h>
   8 #include <string.h>
   9
  10
  11 static char *___strtok = NULL;
  12
  13
  14 char *
  15 strtok_r(char *s, char const *ct, char **save_ptr)
  16 {
  17         char *sbegin, *send;
  18
  19         if (!s && !save_ptr)
  20                 return NULL;
  21
  22         sbegin  = s ? s : *save_ptr;
  23         if (!sbegin)
  24                 return NULL;
  25
  26         sbegin += strspn(sbegin, ct);
  27         if (*sbegin == '\0') {
  28                 if (save_ptr)
  29                         *save_ptr = NULL;
  30                 return NULL;
  31         }
  32
  33         send = strpbrk(sbegin, ct);
  34         if (send && *send != '\0')
  35                 *send++ = '\0';
  36         if (save_ptr)
  37                 *save_ptr = send;
  38
  39         return sbegin;
  40 }
  41
  42
  43 char *
  44 strtok(char *s, char const *ct)
  45 {
  46         return strtok_r(s, ct, &___strtok);
  47 }
  48