src/system/libroot/posix/wchar/wcstok.c

   1 /*
   2 ** Copyright 2001, Travis Geiselbrecht.
   3 ** Copyright 2011, Oliver Tappe <zooey@hirschkaefer.de>
   4 ** All rights reserved. Distributed under the terms of the NewOS License.
   5 */
   6
   7
   8 #include <wchar_private.h>
   9
  10
  11 wchar_t *
  12 __wcstok(wchar_t* wcs, const wchar_t* delim, wchar_t** savePtr)
  13 {
  14         wchar_t *wcsBegin, *wcsEnd;
  15
  16         if (wcs == NULL && savePtr == NULL)
  17                 return NULL;
  18
  19         wcsBegin  = wcs ? wcs : *savePtr;
  20         if (wcsBegin == NULL)
  21                 return NULL;
  22
  23         wcsBegin += wcsspn(wcsBegin, delim);
  24         if (*wcsBegin == '\0') {
  25                 if (savePtr)
  26                         *savePtr = NULL;
  27                 return NULL;
  28         }
  29
  30         wcsEnd = wcspbrk(wcsBegin, delim);
  31         if (wcsEnd && *wcsEnd != '\0')
  32                 *wcsEnd++ = '\0';
  33         if (savePtr)
  34                 *savePtr = wcsEnd;
  35
  36         return wcsBegin;
  37 }
  38
  39
  40 B_DEFINE_WEAK_ALIAS(__wcstok, wcstok);