lib/sdk/crt/mbstring/mbstrlen.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/sdk/crt/mbstring/mbstrlen.c
   5  * PURPOSE:      Determines the length of a multi byte string, current locale
   6  * PROGRAMERS:
   7  *              Copyright 1999 Alexandre Julliard
   8  *              Copyright 2000 Jon Griffths
   9  *
  10  */
  11
  12 #include <mbstring.h>
  13 #include <stdlib.h>
  14
  15 #ifdef _LIBCNT_
  16 unsigned short *NlsLeadByteInfo;
  17 #define isleadbyte(c) NlsLeadByteInfo[c]
  18 #else
  19 int isleadbyte(int byte);
  20 #endif
  21
  22 /*
  23  * @implemented
  24  */
  25 size_t _mbstrlen( const char *str )
  26 {
  27   size_t len = 0;
  28   while(*str)
  29   {
  30     /* FIXME: According to the documentation we are supposed to test for
  31      * multi-byte character validity. Whatever that means
  32      */
  33     str += isleadbyte(*str) ? 2 : 1;
  34     len++;
  35   }
  36   return len;
  37 }