reactos/lib/sdk/crt/stdlib/mbtowc.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crt/??????
   5  * PURPOSE:     Unknown
   6  * PROGRAMER:   Unknown
   7  * UPDATE HISTORY:
   8  *              25/11/05: Added license header
   9  */
  10
  11 #include <precomp.h>
  12
  13
  14 /*
  15  * @implemented
  16  */
  17
  18 int mbtowc (wchar_t *charptr, const char *address, size_t number)
  19 {
  20     int bytes;
  21
  22     if (address == 0)
  23         return 0;
  24
  25     if ((bytes = mblen (address, number)) < 0)
  26         return bytes;
  27
  28     if (charptr) {
  29         switch (bytes) {
  30         case 0:
  31             if (number > 0)
  32                 *charptr = (wchar_t) '\0';
  33             break;
  34         case 1:
  35             *charptr = (wchar_t) ((unsigned char) address[0]);
  36             break;
  37         case 2:
  38             *charptr = (wchar_t) (((unsigned char) address[0] << 8)
  39                                   | (unsigned char) address[1]);
  40             break;
  41         }
  42     }
  43
  44     return bytes;
  45 }