mirror of
https://github.com/rn10950/RetroZilla.git
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245 lines
7.5 KiB
C++
245 lines
7.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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 Communicator client 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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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsUnicodeToISO2022JP.h"
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#include "nsIComponentManager.h"
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#include "nsUCVJADll.h"
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// Class ID for our UnicodeEncoderHelper implementation
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// {1767FC50-CAA4-11d2-8AA9-00600811A836}
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static NS_DEFINE_CID(kUnicodeEncodeHelperCID, NS_UNICODEENCODEHELPER_CID);
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//----------------------------------------------------------------------
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// Global functions and data [declaration]
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static const PRUint16 g_ufAsciiMapping [] = {
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0x0001, 0x0004, 0x0005, 0x0008, 0x0000, 0x0000, 0x007F, 0x0000
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};
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static const PRInt16 g_ufAsciiShift [] = {
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0, u1ByteCharset,
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ShiftCell(0,0,0,0,0,0,0,0)
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};
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static const PRInt16 g_uf0201Shift [] = {
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2, u1ByteCharset ,
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ShiftCell(u1ByteChar, 1, 0x00, 0x7F, 0x00, 0x00, 0x00, 0x7F),
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ShiftCell(u1ByteChar, 1, 0xA1, 0xDF, 0x00, 0xA1, 0x00, 0xDF),
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};
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static const PRInt16 g_uf0208Shift [] = {
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0, u2BytesCharset,
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ShiftCell(0,0,0,0,0,0,0,0)
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};
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#define SIZE_OF_TABLES 5
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static const PRUint16 * g_ufMappingTables[SIZE_OF_TABLES] = {
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g_ufAsciiMapping, // ASCII ISOREG 6
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g_uf0201GLMapping, // JIS X 0201-1976 ISOREG 14
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g_uf0208Mapping, // JIS X 0208-1983 ISOREG 87
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g_uf0208extMapping, // JIS X 0208 - cp932 ext
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g_uf0208Mapping, // JIS X 0208-1978 ISOREG 42
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};
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static const PRInt16 * g_ufShiftTables[SIZE_OF_TABLES] = {
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g_ufAsciiShift, // ASCII ISOREG 6
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g_uf0201Shift, // JIS X 0201-1976 ISOREG 14
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g_uf0208Shift, // JIS X 0208-1983 ISOREG 87
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g_uf0208Shift, // JIS X 0208- cp932 ext
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g_uf0208Shift, // JIS X 0208-1978 ISOREG 42
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};
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//----------------------------------------------------------------------
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// Class nsUnicodeToISO2022JP [implementation]
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// worst case max length:
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// 1 2 3 4 5 6 7 8
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// ESC $ B XX XX ESC ( B
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nsUnicodeToISO2022JP::nsUnicodeToISO2022JP()
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: nsEncoderSupport(8)
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{
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mHelper = NULL;
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Reset();
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}
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nsUnicodeToISO2022JP::~nsUnicodeToISO2022JP()
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{
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NS_IF_RELEASE(mHelper);
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}
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nsresult nsUnicodeToISO2022JP::ChangeCharset(PRInt32 aCharset,
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char * aDest,
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PRInt32 * aDestLength)
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{
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// both 2 and 3 generate the same escape sequence. 2 is for
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// the standard JISx0208 table, and 3 is for theCP932 extensions
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// therefore, we treat them as the same one.
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if(((2 == aCharset) && ( 3 == mCharset)) ||
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((3 == aCharset) && ( 2 == mCharset)) )
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{
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mCharset = aCharset;
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}
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if(aCharset == mCharset)
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{
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*aDestLength = 0;
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return NS_OK;
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}
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if (*aDestLength < 3) {
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*aDestLength = 0;
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return NS_OK_UENC_MOREOUTPUT;
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}
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switch (aCharset) {
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case 0: // ASCII ISOREG 6
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aDest[0] = 0x1b;
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aDest[1] = '(';
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aDest[2] = 'B';
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break;
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case 1: // JIS X 0201-1976 ("Roman" set) ISOREG 14
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aDest[0] = 0x1b;
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aDest[1] = '(';
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aDest[2] = 'J';
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break;
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case 2: // JIS X 0208-1983 ISOREG 87
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case 3: // JIS X 0208-1983
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// we currently use this for CP932 ext
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aDest[0] = 0x1b;
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aDest[1] = '$';
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aDest[2] = 'B';
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break;
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case 4: // JIS X 0201-1978 ISOREG 87-
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// we currently do not have a diff mapping for it.
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aDest[0] = 0x1b;
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aDest[1] = '$';
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aDest[2] = '@';
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break;
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}
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mCharset = aCharset;
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*aDestLength = 3;
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return NS_OK;
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}
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//----------------------------------------------------------------------
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// Subclassing of nsTableEncoderSupport class [implementation]
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NS_IMETHODIMP nsUnicodeToISO2022JP::FillInfo(PRUint32* aInfo)
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{
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nsresult res;
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if (mHelper == nsnull) {
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res = CallCreateInstance(kUnicodeEncodeHelperCID, &mHelper);
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if (NS_FAILED(res)) return NS_ERROR_UENC_NOHELPER;
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}
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return mHelper->FillInfo(aInfo,
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SIZE_OF_TABLES,
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(uMappingTable **) g_ufMappingTables);
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}
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NS_IMETHODIMP nsUnicodeToISO2022JP::ConvertNoBuffNoErr(
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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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nsresult res = NS_OK;
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if (mHelper == nsnull) {
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res = CallCreateInstance(kUnicodeEncodeHelperCID, &mHelper);
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if (NS_FAILED(res)) return NS_ERROR_UENC_NOHELPER;
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}
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const PRUnichar * src = aSrc;
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const PRUnichar * srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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char * destEnd = aDest + *aDestLength;
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PRInt32 bcr, bcw;
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PRInt32 i;
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while (src < srcEnd) {
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for (i=0; i< SIZE_OF_TABLES ; i++) {
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bcr = 1;
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bcw = destEnd - dest;
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res = mHelper->ConvertByTable(src, &bcr, dest, &bcw,
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(uShiftTable *) g_ufShiftTables[i],
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(uMappingTable *) g_ufMappingTables[i]);
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if (res != NS_ERROR_UENC_NOMAPPING) break;
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}
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if ( i>= SIZE_OF_TABLES) {
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res = NS_ERROR_UENC_NOMAPPING;
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src++;
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}
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if (res != NS_OK) break;
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bcw = destEnd - dest;
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res = ChangeCharset(i, dest, &bcw);
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dest += bcw;
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if (res != NS_OK) break;
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bcr = srcEnd - src;
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bcw = destEnd - dest;
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res = mHelper->ConvertByTable(src, &bcr, dest, &bcw,
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(uShiftTable *) g_ufShiftTables[i],
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(uMappingTable *) g_ufMappingTables[i]);
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src += bcr;
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dest += bcw;
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if ((res != NS_OK) && (res != NS_ERROR_UENC_NOMAPPING)) break;
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if (res == NS_ERROR_UENC_NOMAPPING) src--;
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}
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return res;
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}
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NS_IMETHODIMP nsUnicodeToISO2022JP::FinishNoBuff(char * aDest,
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PRInt32 * aDestLength)
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{
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ChangeCharset(0, aDest, aDestLength);
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return NS_OK;
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}
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NS_IMETHODIMP nsUnicodeToISO2022JP::Reset()
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{
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mCharset = 0;
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return nsEncoderSupport::Reset();
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}
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