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

   1 /*
   2 ** Copyright 2011, Oliver Tappe, zooey@hirschkaefer.de. All rights reserved.
   3 ** Distributed under the terms of the Haiku License.
   4 */
   5
   6 #include <wchar_private.h>
   7
   8
   9 wint_t
  10 __btowc(int c)
  11 {
  12         static mbstate_t internalMbState;
  13         char character = (char)c;
  14         wchar_t wc;
  15
  16         if (c == EOF)
  17                 return WEOF;
  18
  19         if (c == '\0')
  20                 return L'\0';
  21
  22         {
  23                 int byteCount = __mbrtowc(&wc, &character, 1, &internalMbState);
  24
  25                 if (byteCount != 1)
  26                         return WEOF;
  27         }
  28
  29         return wc;
  30 }
  31
  32
  33 B_DEFINE_WEAK_ALIAS(__btowc, btowc);