/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: NPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Netscape 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/NPL/ * * 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 * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * * Alternatively, the contents of this file may be used under the terms of * either 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 NPL, 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 NPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "nsGBKConvUtil.h" #include "gbku.h" #include "nsCRT.h" #include "nsICharRepresentable.h" #define MAX_GBK_LENGTH 24066 /* (0xfe-0x80)*(0xfe-0x3f) */ //-------------------------------------------------------------------- // nsGBKConvUtil //-------------------------------------------------------------------- static PRBool gInitToGBKTable = PR_FALSE; static PRUnichar gGBKToUnicodeTable[MAX_GBK_LENGTH] = { #include "cp936map.h" }; static PRUint16 gUnicodeToGBKTable[0xA000-0x4e00]; PRBool nsGBKConvUtil::UnicodeToGBKChar( PRUnichar aChar, PRBool aToGL, char* aOutByte1, char* aOutByte2) { NS_ASSERTION(gInitToGBKTable, "gGBKToUnicodeTable is not init yet. need to call InitToGBKTable first"); PRBool found=PR_FALSE; *aOutByte1 = *aOutByte2 = 0; if(UNICHAR_IN_RANGE(0x4e00, aChar, 0x9FFF)) { PRUint16 item = gUnicodeToGBKTable[aChar - 0x4e00]; *aOutByte1 = item >> 8; *aOutByte2 = item & 0x00FF; found = PR_TRUE; } for( PRInt32 i = 0; i < MAX_GBK_LENGTH; i++ ) { if( aChar == gGBKToUnicodeTable[i]) { *aOutByte1 = (i / 0x00BF + 0x0081) ; *aOutByte2 = (i % 0x00BF + 0x0040) ; found = PR_TRUE; break; } } if(! found) return PR_FALSE; if(aToGL) { // to GL, we only return if it is in the range if(UINT8_IN_RANGE(0xA1, *aOutByte1, 0xFE) && UINT8_IN_RANGE(0xA1, *aOutByte2, 0xFE)) { // mask them to GL *aOutByte1 &= 0x7F; *aOutByte2 &= 0x7F; } else { // if it does not fit into 0xa1-0xfe 0xa1-0xfe range that mean // it is not a GB2312 character, we cannot map to GL *aOutByte1 = 0x00; *aOutByte2 = 0x00; return PR_FALSE; } } return PR_TRUE; } PRUnichar nsGBKConvUtil::GBKCharToUnicode(char aByte1, char aByte2) { NS_ASSERTION(UINT8_IN_RANGE(0x81,aByte1, 0xFE), "first byte out of range"); NS_ASSERTION(UINT8_IN_RANGE(0x40,aByte2, 0xFE), "second byte out of range"); PRUint8 i1 = (PRUint8)aByte1; PRUint8 i2 = (PRUint8)aByte2; PRUint16 idx = (i1 - 0x0081) * 0x00bf + i2 - 0x0040 ; NS_ASSERTION(idx < MAX_GBK_LENGTH, "ARB"); // play it safe- add if statement here ot protect ARB // probably not necessary if(idx < MAX_GBK_LENGTH) return gGBKToUnicodeTable[ idx ]; else return UCS2_NO_MAPPING; } void nsGBKConvUtil::InitToGBKTable() { if ( gInitToGBKTable ) return; PRUnichar unicode; PRUnichar i; // zap it to zero first nsCRT::memset(gUnicodeToGBKTable,0, sizeof(gUnicodeToGBKTable)); for ( i=0; i