зеркало из https://github.com/mozilla/pjs.git
223 строки
7.2 KiB
C++
223 строки
7.2 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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* Jungshik Shin <jshin@mailaps.org>
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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 "nsISO2022KRToUnicode.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 nsISO2022KRToUnicode::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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while((src < srcEnd))
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{
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// if LF/CR, return to US-ASCII unconditionally.
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if ( *src == 0x0a || *src == 0x0d )
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mState = mState_Init;
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switch(mState)
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{
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case mState_Init:
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if(0x1b == *src) {
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mLastLegalState = mState_ASCII;
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mState = mState_ESC;
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break;
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}
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mState = mState_ASCII;
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// fall through
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case mState_ASCII:
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if(0x0e == *src) { // Shift-Out
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mState = mState_KSX1001_1992;
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mRunLength = 0;
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}
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else if(*src & 0x80) {
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if (CHECK_OVERRUN(dest, destEnd, 1))
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goto error1;
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*dest++ = 0xFFFD;
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}
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else {
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if (CHECK_OVERRUN(dest, destEnd, 1))
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goto error1;
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*dest++ = (PRUnichar) *src;
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}
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break;
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case mState_ESC:
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if('$' == *src) {
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mState = mState_ESC_24;
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}
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else {
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if (CHECK_OVERRUN(dest, destEnd, 2))
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goto error1;
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*dest++ = (PRUnichar) 0x1b;
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = mLastLegalState;
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}
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break;
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case mState_ESC_24: // ESC $
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if(')' == *src) {
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mState = mState_ESC_24_29;
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}
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else {
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if (CHECK_OVERRUN(dest, destEnd, 3))
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goto error1;
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*dest++ = (PRUnichar) 0x1b;
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*dest++ = (PRUnichar) '$';
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*dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
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mState = mLastLegalState;
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}
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break;
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case mState_ESC_24_29: // ESC $ )
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mState = mLastLegalState;
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if('C' == *src) {
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mState = mState_ASCII;
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mRunLength = 0;
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}
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else {
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if (CHECK_OVERRUN(dest, destEnd, 4))
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goto error1;
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*dest++ = (PRUnichar) 0x1b;
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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 = mLastLegalState;
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}
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break;
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case mState_KSX1001_1992:
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if (0x20 < (PRUint8) *src && (PRUint8) *src < 0x7f) {
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mData = (PRUint8) *src;
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mState = mState_KSX1001_1992_2ndbyte;
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}
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else if (0x0f == *src) { // Shift-In (SI)
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mState = mState_ASCII;
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if (mRunLength == 0) {
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if (CHECK_OVERRUN(dest, destEnd, 1))
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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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}
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else if ((PRUint8) *src == 0x20 || (PRUint8) *src == 0x09) {
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// Allow space and tab between SO and SI (i.e. in Hangul segment)
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if (CHECK_OVERRUN(dest, destEnd, 1))
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goto error1;
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mState = mState_KSX1001_1992;
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*dest++ = (PRUnichar) *src;
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++mRunLength;
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}
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else { // Everything else is invalid.
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if (CHECK_OVERRUN(dest, destEnd, 1))
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goto error1;
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*dest++ = 0xFFFD;
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}
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break;
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case mState_KSX1001_1992_2ndbyte:
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if ( 0x20 < (PRUint8) *src && (PRUint8) *src < 0x7f ) {
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if (!mEUCKRDecoder) {
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// creating a delegate converter (EUC-KR)
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nsresult rv;
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nsCOMPtr<nsICharsetConverterManager> ccm =
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do_GetService(kCharsetConverterManagerCID, &rv);
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if (NS_SUCCEEDED(rv)) {
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rv = ccm->GetUnicodeDecoderRaw("EUC-KR", &mEUCKRDecoder);
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}
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}
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if (!mEUCKRDecoder) {// failed creating a delegate converter
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*dest++ = 0xFFFD;
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}
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else {
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if (CHECK_OVERRUN(dest, destEnd, 1))
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goto error1;
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unsigned char ksx[2];
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PRUnichar uni;
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PRInt32 ksxLen = 2, uniLen = 1;
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// mData is the original 1st byte.
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// *src is the present 2nd byte.
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// Put 2 bytes (one character) to ksx[] with EUC-KR encoding.
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ksx[0] = mData | 0x80;
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ksx[1] = *src | 0x80;
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// Convert EUC-KR to unicode.
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mEUCKRDecoder->Convert((const char *)ksx, &ksxLen, &uni, &uniLen);
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*dest++ = uni;
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++mRunLength;
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}
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mState = mState_KSX1001_1992;
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}
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else { // Invalid
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if ( 0x0f == *src ) { // Shift-In (SI)
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mState = mState_ASCII;
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}
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else {
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mState = mState_KSX1001_1992;
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}
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if (CHECK_OVERRUN(dest, destEnd, 1))
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goto error1;
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*dest++ = 0xFFFD;
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}
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break;
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case mState_ERROR:
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mState = mLastLegalState;
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if (CHECK_OVERRUN(dest, destEnd, 1))
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goto error1;
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*dest++ = 0xFFFD;
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break;
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} // switch
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src++;
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}
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*aDestLen = dest - aDest;
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return NS_OK;
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error1:
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*aDestLen = dest-aDest;
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*aSrcLen = src-(unsigned char*)aSrc;
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return NS_OK_UDEC_MOREOUTPUT;
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}
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