RetroZilla/intl/uconv/ucvcn/nsGB2312ToUnicodeV2.cpp
2015-10-20 23:03:22 -04:00

119 lines
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Intel Corporation.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Yueheng Xu <yuheng.xu@intel.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// =======================================================================
// Original Author: Yueheng Xu
// email: yueheng.xu@intel.com
// phone: (503)264-2248
// Intel Corporation, Oregon, USA
// Last Update: September 7, 1999
// Revision History:
// 09/07/1999 - initial version. Based on exisiting nsGB2312ToUnicode.cpp. Removed
// dependecy on those shift/map tables. Now we only depend on gbku.h.
// 09/28/1999 - changed to use the same table and code as GBKToUnicode converter
// ======================================================================================
#if 0
#include "nsGB2312ToUnicodeV2.h"
#include "nsUCvCnDll.h"
#include "gbku.h"
//----------------------------------------------------------------------
// Class nsGB2312ToUnicodeV2 [implementation]
//----------------------------------------------------------------------
// Subclassing of nsTablesDecoderSupport class [implementation]
NS_IMETHODIMP nsGB2312ToUnicodeV2::GetMaxLength(const char * aSrc,
PRInt32 aSrcLength,
PRInt32 * aDestLength)
{
*aDestLength = aSrcLength;
return NS_OK;
}
NS_IMETHODIMP nsGB2312ToUnicodeV2::ConvertNoBuff(const char* aSrc,
PRInt32 * aSrcLength,
PRUnichar *aDest,
PRInt32 * aDestLength)
{
PRInt32 i=0;
PRInt32 iSrcLength = (*aSrcLength);
PRInt32 iDestlen = 0;
nsresult rv = NS_OK;
for (i=0;i<iSrcLength;i++)
{
if ( iDestlen >= (*aDestLength) )
{
rv = NS_OK_UDEC_MOREOUTPUT;
break;
}
if(UINT8_IN_RANGE(0xa1, *aSrc, 0xfe))
{
if(i+1 >= iSrcLength)
{
rv = NS_OK_UDEC_MOREINPUT;
break;
}
// To make sure, the second byte has to be checked as well
// The valid 2nd byte range: [0xA1,0xFE]
if(UINT8_IN_RANGE(0xa1, aSrc[1], 0xfe))
{
// Valid GB 2312 code point
*aDest = mUtil.GBKCharToUnicode(aSrc[0], aSrc[1]);
aSrc += 2;
i++;
} else {
// Invalid GB 2312 code point
*aDest = UCS2_NO_MAPPING;
aSrc++;
}
} else {
if(IS_ASCII(*aSrc))
{
// The source is an ASCII
*aDest = CAST_CHAR_TO_UNICHAR(*aSrc);
} else {
*aDest = UCS2_NO_MAPPING;
}
aSrc++;
}
iDestlen++;
aDest++;
*aSrcLength = i+1;
}
*aDestLength = iDestlen;
return rv;
}
#endif