add new file for bug 80772

r=bstell a=ftang
This commit is contained in:
ftang%netscape.com 2001-05-15 12:33:38 +00:00
parent 1c7d8d92a5
commit 95e705dbed
2 changed files with 226 additions and 0 deletions

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#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<MAX_GBK_LENGTH; i++ )
{
unicode = gGBKToUnicodeTable[i];
// to reduce size of gUnicodeToGBKTable, we only do direct unicode to GB
// table mapping between unicode 0x4E00 and 0xA000. Others by searching
// gGBKToUnicodeTable. There is a trade off between memory usage and speed.
if(UNICHAR_IN_RANGE(0x4e00, unicode, 0x9fff))
{
unicode -= 0x4E00;
gUnicodeToGBKTable[unicode] = (( i / 0x00BF + 0x0081) << 8) |
( i % 0x00BF+ 0x0040);
}
}
gInitToGBKTable = PR_TRUE;
}
void nsGBKConvUtil::FillInfo(
PRUint32 *aInfo,
PRUint8 aStart1, PRUint8 aEnd1,
PRUint8 aStart2, PRUint8 aEnd2
)
{
PRUint16 i,j, k;
PRUnichar unicode;
for ( i=aStart1; i<=aEnd1; i++)
{
for( j=aStart2; j<=aEnd2; j++)
{
k = (i - 0x0081)*0x00BF +(j-0x0040);
unicode = gGBKToUnicodeTable[k];
NS_ASSERTION(unicode != 0xFFFF, "somehow the table still use 0xffff");
if (unicode != UCS2_NO_MAPPING)
{
SET_REPRESENTABLE(aInfo, unicode);
}
}
}
}
void nsGBKConvUtil::FillGB2312Info(
PRUint32 *aInfo
)
{
// The following range is coded by looking at the GB2312 standard
// and make sure we do not call FillInfo for undefined code point
// Symbol
// row 1 - 1 range (full)
FillInfo(aInfo, 0x21|0x80, 0x21|0x80, 0x21|0x80, 0x7E|0x80);
// row 2 - 3 range
FillInfo(aInfo, 0x22|0x80, 0x22|0x80, (0x20+17)|0x80, (0x20+66)|0x80);
FillInfo(aInfo, 0x22|0x80, 0x22|0x80, (0x20+69)|0x80, (0x20+78)|0x80);
FillInfo(aInfo, 0x22|0x80, 0x22|0x80, (0x20+81)|0x80, (0x20+92)|0x80);
// row 3 - 1 range (full)
FillInfo(aInfo, 0x23|0x80, 0x23|0x80, 0x21|0x80, 0x7E|0x80);
// row 4 - 1 range
FillInfo(aInfo, 0x24|0x80, 0x24|0x80, (0x20+ 1)|0x80, (0x20+83)|0x80);
// row 5 - 1 range
FillInfo(aInfo, 0x25|0x80, 0x25|0x80, (0x20+ 1)|0x80, (0x20+86)|0x80);
// row 6 - 2 range
FillInfo(aInfo, 0x26|0x80, 0x26|0x80, (0x20+ 1)|0x80, (0x20+24)|0x80);
FillInfo(aInfo, 0x26|0x80, 0x26|0x80, (0x20+33)|0x80, (0x20+56)|0x80);
// row 7
FillInfo(aInfo, 0x27|0x80, 0x27|0x80, (0x20+ 1)|0x80, (0x20+33)|0x80);
FillInfo(aInfo, 0x27|0x80, 0x27|0x80, (0x20+49)|0x80, (0x20+81)|0x80);
// row 8
FillInfo(aInfo, 0x28|0x80, 0x28|0x80, (0x20+ 1)|0x80, (0x20+26)|0x80);
FillInfo(aInfo, 0x28|0x80, 0x28|0x80, (0x20+36)|0x80, (0x20+73)|0x80);
// row 9
FillInfo(aInfo, 0x29|0x80, 0x29|0x80, (0x20+ 4)|0x80, (0x20+79)|0x80);
// Frequent used Hanzi
// 3021-567e
FillInfo(aInfo, 0x30|0x80, 0x56|0x80, 0x21|0x80, 0x7E|0x80);
// 5721-5779
FillInfo(aInfo, 0x57|0x80, 0x57|0x80, 0x21|0x80, 0x79|0x80);
// Infrequent used Hanzi
// 5821-777e
FillInfo(aInfo, 0x58|0x80, 0x77|0x80, 0x21|0x80, 0x7E|0x80);
}

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsGBKConvUtil_h__
#define nsGBKConvUtil_h__
#include "prtypes.h"
#include "nscore.h"
class nsGBKConvUtil {
public:
nsGBKConvUtil() { };
~nsGBKConvUtil() { };
void InitToGBKTable();
PRUnichar GBKCharToUnicode(char aByte1, char aByte2);
PRBool UnicodeToGBKChar(PRUnichar aChar, PRBool aToGL,
char* aOutByte1, char* aOutByte2);
void FillInfo(PRUint32 *aInfo, PRUint8 aStart1, PRUint8 aEnd1,
PRUint8 aStart2, PRUint8 aEnd2);
void FillGB2312Info(PRUint32 *aInfo);
};
#endif /* nsGBKConvUtil_h__ */