mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-09-20 04:00:24 +02:00
612 lines
18 KiB
C++
612 lines
18 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: 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.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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* Ervin Yan <ervin.yan@sun.com>
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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 "nsISO2022CNToUnicode.h"
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#include "nsUCSupport.h"
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#include "nsICharsetConverterManager.h"
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#include "nsIServiceManager.h"
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static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
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NS_IMETHODIMP nsISO2022CNToUnicode::GB2312_To_Unicode(unsigned char *aSrc, PRInt32 aSrcLength, PRUnichar * aDest, PRInt32 * aDestLength)
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{
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nsresult rv;
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if(!mGB2312_Decoder) {
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// creating a delegate converter (GB2312)
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nsCOMPtr<nsICharsetConverterManager> ccm =
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do_GetService(kCharsetConverterManagerCID, &rv);
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if(NS_FAILED(rv))
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return NS_ERROR_UNEXPECTED;
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rv = ccm->GetUnicodeDecoderRaw("GB2312", getter_AddRefs(mGB2312_Decoder));
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if(NS_FAILED(rv))
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return NS_ERROR_UNEXPECTED;
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}
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if(!mGB2312_Decoder) // failed creating a delegate converter
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return NS_ERROR_UNEXPECTED;
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rv = mGB2312_Decoder->Convert((const char *)aSrc, &aSrcLength, aDest, aDestLength);
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return rv;
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}
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NS_IMETHODIMP nsISO2022CNToUnicode::EUCTW_To_Unicode(unsigned char *aSrc, PRInt32 aSrcLength, PRUnichar * aDest, PRInt32 * aDestLength)
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{
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nsresult rv;
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if(!mEUCTW_Decoder) {
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// creating a delegate converter (x-euc-tw)
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nsCOMPtr<nsICharsetConverterManager> ccm =
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do_GetService(kCharsetConverterManagerCID, &rv);
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if(NS_FAILED(rv))
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return NS_ERROR_UNEXPECTED;
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rv = ccm->GetUnicodeDecoderRaw("x-euc-tw", getter_AddRefs(mEUCTW_Decoder));
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if(NS_FAILED(rv))
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return NS_ERROR_UNEXPECTED;
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}
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if(!mEUCTW_Decoder) // failed creating a delegate converter
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return NS_ERROR_UNEXPECTED;
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rv = mEUCTW_Decoder->Convert((const char *)aSrc, &aSrcLength, aDest, aDestLength);
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return(rv);
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}
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NS_IMETHODIMP nsISO2022CNToUnicode::Convert(const char * aSrc, PRInt32 * aSrcLen, PRUnichar * aDest, PRInt32 * aDestLen)
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{
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const unsigned char * srcEnd = (unsigned char *)aSrc + *aSrcLen;
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const unsigned char * src = (unsigned char *) aSrc;
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PRUnichar* destEnd = aDest + *aDestLen;
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PRUnichar* dest = aDest;
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nsresult rv;
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PRInt32 aLen;
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while ((src < srcEnd))
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{
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switch (mState)
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{
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case eState_ASCII:
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if(ESC == *src) {
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mState = eState_ESC;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_ESC: // ESC
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if('$' == *src) {
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mState = eState_ESC_24;
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} else {
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if(dest+2 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_ESC_24: // ESC $
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if(')' == *src) {
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mState = eState_ESC_24_29;
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} else if('*' == *src) {
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mState = eState_ESC_24_2A;
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} else if('+' == *src) {
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mState = eState_ESC_24_2B;
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} else {
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if(dest+3 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_ESC_24_29: // ESC $ )
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if('A' == *src) {
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mState = eState_ESC_24_29_A;
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} else if('G' == *src) {
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mState = eState_ESC_24_29_G;
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} else {
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if(dest+4 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (PRUnichar) ')';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_ESC_24_29_A: // ESC $ ) A
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if(SO == *src) {
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mState = eState_GB2312_1980;
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mRunLength = 0;
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} else {
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if(dest+5 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (PRUnichar) ')';
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*dest++ = (PRUnichar) 'A';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_GB2312_1980: // ESC $ ) A SO
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if(SI == *src) { // Shift-In (SI)
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mState = eState_ESC_24_29_A_SO_SI;
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if (mRunLength == 0) {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = 0xFFFD;
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}
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mRunLength = 0;
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} else if(ESC == *src) {
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mState = eState_ESC;
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} else {
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if(0x20 < *src && *src < 0x7f) {
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mData = *src;
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mState = eState_GB2312_1980_2ndbyte;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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}
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}
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break;
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case eState_GB2312_1980_2ndbyte: // ESC $ ) A SO
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if(0x20 < *src && *src < 0x7f) {
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unsigned char gb[2];
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PRInt32 gbLen = 2;
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gb[0] = mData | 0x80;
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gb[1] = *src | 0x80;
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aLen = destEnd - dest;
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rv = GB2312_To_Unicode(gb, gbLen, dest, &aLen);
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++mRunLength;
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if(rv == NS_OK_UDEC_MOREOUTPUT) {
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goto error1;
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} else if(NS_FAILED(rv)) {
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goto error2;
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}
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dest += aLen;
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} else {
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if(dest+2 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) mData;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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}
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mState = eState_GB2312_1980;
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break;
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case eState_ESC_24_29_A_SO_SI: // ESC $ ) A SO SI
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if(SO == *src) {
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mState = eState_GB2312_1980;
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mRunLength = 0;
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} else if(ESC == *src) {
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mState = eState_ESC;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ESC_24_29_A_SO_SI;
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}
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break;
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case eState_ESC_24_29_G: // ESC $ ) G
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if(SO == *src) {
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mState = eState_CNS11643_1;
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mRunLength = 0;
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} else {
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if(dest+5 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (PRUnichar) ')';
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*dest++ = (PRUnichar) 'G';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_CNS11643_1: // ESC $ ) G SO
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if(SI == *src) { // Shift-In (SI)
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mState = eState_ESC_24_29_G_SO_SI;
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if (mRunLength == 0) {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = 0xFFFD;
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}
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mRunLength = 0;
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} else if(ESC == *src) {
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mState = eState_ESC;
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} else {
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if(0x20 < *src && *src < 0x7f) {
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mData = *src;
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mState = eState_CNS11643_1_2ndbyte;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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}
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}
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break;
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case eState_CNS11643_1_2ndbyte: // ESC $ ) G SO
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if(0x20 < *src && *src < 0x7f) {
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unsigned char cns[4];
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PRInt32 cnsLen = 2;
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cns[0] = mData | 0x80;
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cns[1] = *src | 0x80;
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aLen = destEnd - dest;
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rv = EUCTW_To_Unicode(cns, cnsLen, dest, &aLen);
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++mRunLength;
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if(rv == NS_OK_UDEC_MOREOUTPUT) {
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goto error1;
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} else if(NS_FAILED(rv)) {
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goto error2;
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}
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dest += aLen;
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} else {
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if(dest+2 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) mData;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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}
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mState = eState_CNS11643_1;
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break;
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case eState_ESC_24_29_G_SO_SI: // ESC $ ) G SO SI
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if(SO == *src) {
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mState = eState_CNS11643_1;
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mRunLength = 0;
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} else if(ESC == *src) {
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mState = eState_ESC;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ESC_24_29_G_SO_SI;
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}
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break;
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case eState_ESC_24_2A: // ESC $ *
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if('H' == *src) {
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mState = eState_ESC_24_2A_H;
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} else {
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if(dest+4 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (PRUnichar) '*';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_ESC_24_2A_H: // ESC $ * H
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if(ESC == *src) {
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mState = eState_ESC_24_2A_H_ESC;
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} else {
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if(dest+5 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (PRUnichar) '*';
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*dest++ = (PRUnichar) 'H';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_ESC_24_2A_H_ESC: // ESC $ * H ESC
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if(SS2 == *src) {
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mState = eState_CNS11643_2;
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mRunLength = 0;
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} else if('$' == *src) {
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mState = eState_ESC_24;
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} else {
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if(dest+6 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (PRUnichar) '*';
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*dest++ = (PRUnichar) 'H';
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*dest++ = (PRUnichar) ESC;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_CNS11643_2: // ESC $ * H ESC SS2
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if(SI == *src) { // Shift-In (SI)
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mState = eState_ESC_24_2A_H_ESC_SS2_SI;
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if (mRunLength == 0) {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = 0xFFFD;
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}
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mRunLength = 0;
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} else if(ESC == *src) {
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mState = eState_ESC_24_2A_H_ESC;
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} else {
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if(0x20 < *src && *src < 0x7f) {
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mData = *src;
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mState = eState_CNS11643_2_2ndbyte;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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}
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}
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break;
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case eState_CNS11643_2_2ndbyte: // ESC $ * H ESC SS2
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if(0x20 < *src && *src < 0x7f) {
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unsigned char cns[4];
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PRInt32 cnsLen = 4;
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cns[0] = (unsigned char) MBYTE;
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cns[1] = (unsigned char) (PMASK + 2);
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cns[2] = mData | 0x80;
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cns[3] = *src | 0x80;
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aLen = destEnd - dest;
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rv = EUCTW_To_Unicode(cns, cnsLen, dest, &aLen);
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++mRunLength;
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if(rv == NS_OK_UDEC_MOREOUTPUT) {
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goto error1;
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} else if(NS_FAILED(rv)) {
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goto error2;
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}
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dest += aLen;
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} else {
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if(dest+2 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) mData;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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}
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mState = eState_CNS11643_2;
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break;
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case eState_ESC_24_2A_H_ESC_SS2_SI: // ESC $ * H ESC SS2 SI
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if(ESC == *src) {
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mState = eState_ESC_24_2A_H_ESC_SS2_SI_ESC;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ESC_24_2A_H_ESC_SS2_SI;
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}
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break;
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case eState_ESC_24_2A_H_ESC_SS2_SI_ESC: // ESC $ * H ESC SS2 SI ESC
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if(SS2 == *src) {
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mState = eState_CNS11643_2;
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mRunLength = 0;
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} else if('$' == *src) {
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mState = eState_ESC_24;
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} else {
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if(dest+1 >= destEnd)
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goto error1;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ESC_24_2A_H_ESC_SS2_SI;
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}
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break;
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case eState_ESC_24_2B: // ESC $ +
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if('I' <= *src && *src <= 'M') {
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mState = eState_ESC_24_2B_I;
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mPlaneID = *src - 'I' + 3;
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} else {
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if(dest+4 >= destEnd)
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goto error1;
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*dest++ = (PRUnichar) ESC;
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*dest++ = (PRUnichar) '$';
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*dest++ = (PRUnichar) '+';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = eState_ASCII;
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}
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break;
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case eState_ESC_24_2B_I: // ESC $ + I
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if(ESC == *src) {
|
|
mState = eState_ESC_24_2B_I_ESC;
|
|
} else {
|
|
if(dest+5 >= destEnd)
|
|
goto error1;
|
|
*dest++ = (PRUnichar) ESC;
|
|
*dest++ = (PRUnichar) '$';
|
|
*dest++ = (PRUnichar) '+';
|
|
*dest++ = (PRUnichar) 'I' + mPlaneID - 3;
|
|
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
|
|
|
|
mState = eState_ASCII;
|
|
}
|
|
break;
|
|
|
|
case eState_ESC_24_2B_I_ESC: // ESC $ + I ESC
|
|
if(SS3 == *src) {
|
|
mState = eState_CNS11643_3;
|
|
mRunLength = 0;
|
|
} else if('$' == *src) {
|
|
mState = eState_ESC_24;
|
|
} else {
|
|
if(dest+6 >= destEnd)
|
|
goto error1;
|
|
*dest++ = (PRUnichar) ESC;
|
|
*dest++ = (PRUnichar) '$';
|
|
*dest++ = (PRUnichar) '+';
|
|
*dest++ = (PRUnichar) 'I' + mPlaneID - 3;
|
|
*dest++ = (PRUnichar) ESC;
|
|
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
|
|
|
|
mState = eState_ASCII;
|
|
}
|
|
break;
|
|
|
|
case eState_CNS11643_3: // ESC $ + I ESC SS3
|
|
if(SI == *src) { // Shift-In (SI)
|
|
mState = eState_ESC_24_2B_I_ESC_SS3_SI;
|
|
if (mRunLength == 0) {
|
|
if(dest+1 >= destEnd)
|
|
goto error1;
|
|
*dest++ = 0xFFFD;
|
|
}
|
|
mRunLength = 0;
|
|
} else if(ESC == *src) {
|
|
mState = eState_ESC_24_2B_I_ESC;
|
|
} else {
|
|
if(0x20 < *src && *src < 0x7f) {
|
|
mData = *src;
|
|
mState = eState_CNS11643_3_2ndbyte;
|
|
} else {
|
|
if(dest+1 >= destEnd)
|
|
goto error1;
|
|
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case eState_CNS11643_3_2ndbyte: // ESC $ + I ESC SS3
|
|
if(0x20 < *src && *src < 0x7f) {
|
|
unsigned char cns[4];
|
|
PRInt32 cnsLen = 4;
|
|
|
|
cns[0] = (unsigned char) MBYTE;
|
|
cns[1] = (unsigned char) (PMASK + mPlaneID);
|
|
cns[2] = mData | 0x80;
|
|
cns[3] = *src | 0x80;
|
|
|
|
aLen = destEnd - dest;
|
|
rv = EUCTW_To_Unicode(cns, cnsLen, dest, &aLen);
|
|
++mRunLength;
|
|
if(rv == NS_OK_UDEC_MOREOUTPUT) {
|
|
goto error1;
|
|
} else if(NS_FAILED(rv)) {
|
|
goto error2;
|
|
}
|
|
|
|
dest += aLen;
|
|
} else {
|
|
if(dest+2 >= destEnd)
|
|
goto error1;
|
|
*dest++ = (PRUnichar) mData;
|
|
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
|
|
}
|
|
mState = eState_CNS11643_3;
|
|
break;
|
|
|
|
case eState_ESC_24_2B_I_ESC_SS3_SI: // ESC $ + I ESC SS3 SI
|
|
if(ESC == *src) {
|
|
mState = eState_ESC_24_2B_I_ESC_SS3_SI_ESC;
|
|
} else {
|
|
if(dest+1 >= destEnd)
|
|
goto error1;
|
|
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
|
|
|
|
mState = eState_ESC_24_2B_I_ESC_SS3_SI;
|
|
}
|
|
break;
|
|
|
|
case eState_ESC_24_2B_I_ESC_SS3_SI_ESC: // ESC $ + I ESC SS3 SI ESC
|
|
if(SS3 == *src) {
|
|
mState = eState_CNS11643_3;
|
|
mRunLength = 0;
|
|
} else if('$' == *src) {
|
|
mState = eState_ESC_24;
|
|
} else {
|
|
if(dest+1 >= destEnd)
|
|
goto error1;
|
|
*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
|
|
|
|
mState = eState_ESC_24_2B_I_ESC_SS3_SI;
|
|
}
|
|
break;
|
|
|
|
} // switch
|
|
src++;
|
|
}
|
|
|
|
*aDestLen = dest- aDest;
|
|
return NS_OK;
|
|
|
|
error1:
|
|
*aDestLen = dest-aDest;
|
|
src++;
|
|
if ((mState == eState_ASCII) && (src == srcEnd)) {
|
|
return NS_OK;
|
|
}
|
|
*aSrcLen = src - (const unsigned char*)aSrc;
|
|
return NS_OK_UDEC_MOREOUTPUT;
|
|
|
|
error2:
|
|
*aSrcLen = src - (const unsigned char*)aSrc;
|
|
*aDestLen = dest-aDest;
|
|
mState = eState_ASCII;
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|