newlib/libc/stdlib/btowc.c

   1 #include <wchar.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4 #include <reent.h>
   5 #include <string.h>
   6 #include "local.h"
   7
   8 wint_t
   9 btowc (int c)
  10 {
  11   mbstate_t mbs;
  12   int retval = 0;
  13   wchar_t pwc;
  14   unsigned char b;
  15
  16   if (c == EOF)
  17     return WEOF;
  18
  19   b = (unsigned char)c;
  20
  21   /* Put mbs in initial state. */
  22   memset (&mbs, '\0', sizeof (mbs));
  23
  24   _REENT_CHECK_MISC(_REENT);
  25
  26   retval = __MBTOWC (_REENT, &pwc, (const char *) &b, 1, &mbs);
  27
  28   if (retval != 0 && retval != 1)
  29     return WEOF;
  30
  31   return (wint_t)pwc;
  32 }