reactos/lib/crtdll/mbstring/mbstok.c

   1 #include <msvcrt/mbstring.h>
   2
   3 unsigned char * _mbstok(unsigned char *s, unsigned char *delim)
   4 {
   5   const char *spanp;
   6   int c, sc;
   7   char *tok;
   8   static char *last;
   9
  10
  11   if (s == NULL && (s = last) == NULL)
  12     return (NULL);
  13
  14   /*
  15    * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
  16    */
  17  cont:
  18   c = *s;
  19   s = _mbsinc(s);
  20
  21   for (spanp = delim; (sc = *spanp) != 0; spanp = _mbsinc(spanp)) {
  22     if (c == sc)
  23       goto cont;
  24   }
  25
  26   if (c == 0) {                 /* no non-delimiter characters */
  27     last = NULL;
  28     return (NULL);
  29   }
  30   tok = s - 1;
  31
  32   /*
  33    * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
  34    * Note that delim must have one NUL; we stop if we see that, too.
  35    */
  36   for (;;) {
  37     c = *s;
  38     s = _mbsinc(s);
  39     spanp = delim;
  40     do {
  41       if ((sc = *spanp) == c) {
  42         if (c == 0)
  43           s = NULL;
  44         else
  45           s[-1] = 0;
  46         last = s;
  47         return (tok);
  48       }
  49       spanp = _mbsinc(spanp);
  50     } while (sc != 0);
  51   }
  52   /* NOTREACHED */
  53 }