reactos/sdk/lib/crt/mbstring/jistojms.c

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/*
* MSVCRT string functions
*
* Copyright 1996,1998 Marcus Meissner
* Copyright 1996 Jukka Iivonen
* Copyright 1997,2000 Uwe Bonnes
* Copyright 2000 Jon Griffiths
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <precomp.h>
#include <mbstring.h>
#include <locale.h>
/*
* @implemented
*/
unsigned int _mbcjistojms(unsigned int c)
{
/* Conversion takes place only when codepage is 932.
In all other cases, c is returned unchanged */
if(get_mbcinfo()->mbcodepage == 932)
{
if(HIBYTE(c) >= 0x21 && HIBYTE(c) <= 0x7e &&
LOBYTE(c) >= 0x21 && LOBYTE(c) <= 0x7e)
{
if(HIBYTE(c) % 2)
c += 0x1f;
else
c += 0x7d;
if(LOBYTE(c) >= 0x7F)
c += 0x1;
c = (((HIBYTE(c) - 0x21)/2 + 0x81) << 8) | LOBYTE(c);
if(HIBYTE(c) > 0x9f)
c += 0x4000;
}
else
return 0; /* Codepage is 932, but c can't be converted */
}
return c;
}