зеркало из https://github.com/mozilla/pjs.git
145 строки
4.6 KiB
C++
145 строки
4.6 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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* A character set converter from Unicode to HZ.
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*
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*
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* @created 08/Sept/1999
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* @author Yueheng Xu, Yueheng.Xu@intel.com
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* Revision History
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* 04/Oct/1999. Yueheng Xu: Fixed line continuation problem when line
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* ended by '~';
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* Used table UnicodeToGBK[] to speed up the mapping.
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*/
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#include "nsUnicodeToHZ.h"
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#include "nsUCvCnDll.h"
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#include "gbku.h"
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//----------------------------------------------------------------------
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// Class nsUnicodeToGBK [implementation]
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#define HZ_STATE_GB 1
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#define HZ_STATE_ASCII 2
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#define HZ_STATE_TILD 3
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#define HZLEAD1 '~'
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#define HZLEAD2 '{'
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#define HZLEAD3 '}'
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#define UNICODE_TILD 0x007E
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nsUnicodeToHZ::nsUnicodeToHZ() : nsEncoderSupport(6)
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{
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mUtil.InitToGBKTable();
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mHZState = HZ_STATE_ASCII; // per HZ spec, default to HZ mode
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}
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NS_IMETHODIMP nsUnicodeToHZ::ConvertNoBuff(
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const PRUnichar * aSrc,
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PRInt32 * aSrcLength,
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char * aDest,
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PRInt32 * aDestLength)
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{
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PRInt32 i=0;
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PRInt32 iSrcLength = *aSrcLength;
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PRInt32 iDestLength = 0;
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for (i=0;i< iSrcLength;i++)
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{
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if(! IS_ASCII(*aSrc))
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{
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// hi byte has something, it is not ASCII, process as a GB
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if ( mHZState != HZ_STATE_GB )
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{
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// we are adding a '~{' ESC sequence to star a HZ string
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mHZState = HZ_STATE_GB;
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aDest[0] = '~';
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aDest[1] = '{';
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aDest += 2; // increment 2 bytes
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iDestLength +=2;
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}
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if(mUtil.UnicodeToGBKChar(*aSrc, PR_TRUE, &aDest[0], &aDest[1])) {
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aDest += 2; // increment 2 bytes
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iDestLength +=2;
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} else {
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// some thing that we cannot convert
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// xxx fix me ftang
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// error handling here
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}
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} else {
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// this is an ASCII
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// if we are in HZ mode, end it by adding a '~}' ESC sequence
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if ( mHZState == HZ_STATE_GB )
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{
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mHZState = HZ_STATE_ASCII;
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aDest[0] = '~';
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aDest[1] = '}';
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aDest += 2; // increment 2 bytes
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iDestLength +=2;
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}
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// if this is a regular char '~' , convert it to two '~'
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if ( *aSrc == UNICODE_TILD )
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{
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aDest[0] = '~';
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aDest[1] = '~';
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aDest += 2; // increment 2 bytes
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iDestLength +=2;
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} else {
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// other regular ASCII chars convert by normal ways
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// Is this works for both little endian and big endian machines ?
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*aDest = (char) ( (PRUnichar)(*aSrc) );
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aDest++; // increment 1 byte
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iDestLength +=1;
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}
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}
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aSrc++; // increment 2 bytes
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if ( iDestLength >= (*aDestLength) )
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{
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break;
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}
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}
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*aDestLength = iDestLength;
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*aSrcLength = i;
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return NS_OK;
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}
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NS_IMETHODIMP nsUnicodeToHZ::FillInfo(PRUint32 *aInfo)
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{
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mUtil.FillGB2312Info(aInfo);
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//GB2312 font lib also have single byte ASCII characters, set them here
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for ( PRUint16 u = 0x0000; u <= 0x007F; u++)
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SET_REPRESENTABLE(aInfo, u);
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return NS_OK;
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}
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