reactos/lib/msvcrt/mbstring/mbslwr.c

   1 #include <msvcrt/mbstring.h>
   2 #include <msvcrt/ctype.h>
   3
   4 unsigned int _mbbtolower(unsigned int c)
   5 {
   6         if (!_ismbblead(c) )
   7                 return tolower(c);
   8         return c;
   9 }
  10
  11 // code page 952
  12 #define CASE_DIFF (0x8281 - 0x8260)
  13
  14 unsigned int _mbctolower(unsigned int c)
  15 {
  16   if ((c & 0xFF00) != 0)
  17     {
  18       // true multibyte case conversion needed
  19       if (_ismbclower(c))
  20         return c + CASE_DIFF;
  21     }
  22   else
  23      return _mbbtolower(c);
  24
  25   return 0;
  26 }
  27
  28 unsigned char * _mbslwr(unsigned char *x)
  29 {
  30   unsigned char  *y=x;
  31
  32   while (*y)
  33     {
  34       if (!_ismbblead(*y))
  35         {
  36           *y = tolower(*y);
  37         }
  38       else
  39         {
  40           *y=_mbctolower(*(unsigned short *)y);
  41           y++;
  42         }
  43     }
  44   return x;
  45 }