зеркало из https://github.com/mozilla/gecko-dev.git
372 строки
9.3 KiB
C++
372 строки
9.3 KiB
C++
/* -*- 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 "nsUnicodeToUCS2BE.h"
|
|
#include <string.h>
|
|
|
|
//----------------------------------------------------------------------
|
|
// Global functions and data [declaration]
|
|
|
|
static const PRUint16 g_UCS2BEMappingTable[] = {
|
|
0x0001, 0x0004, 0x0005, 0x0008, 0x0000, 0x0000, 0xFFFF, 0x0000
|
|
};
|
|
|
|
static const PRInt16 g_UCS2BEShiftTable[] = {
|
|
0, u2BytesCharset,
|
|
ShiftCell(0, 0, 0, 0, 0, 0, 0, 0)
|
|
};
|
|
|
|
//----------------------------------------------------------------------
|
|
// Class nsUnicodeToUCS2BE [implementation]
|
|
|
|
nsUnicodeToUCS2BE::nsUnicodeToUCS2BE()
|
|
: nsTableEncoderSupport((uShiftTable*) &g_UCS2BEShiftTable,
|
|
(uMappingTable*) &g_UCS2BEMappingTable)
|
|
{
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Subclassing of nsTableEncoderSupport class [implementation]
|
|
|
|
NS_IMETHODIMP nsUnicodeToUCS2BE::GetMaxLength(const PRUnichar * aSrc,
|
|
PRInt32 aSrcLength,
|
|
PRInt32 * aDestLength)
|
|
{
|
|
*aDestLength = 2*aSrcLength;
|
|
return NS_OK_UENC_EXACTLENGTH;
|
|
}
|
|
NS_IMETHODIMP nsUnicodeToUCS2BE::FillInfo(PRUint32 *aInfo)
|
|
{
|
|
memset(aInfo, 0xFF, (0x10000L >> 3));
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
|
|
class nsUnicodeToUTF16SameEndian: public nsBasicEncoder
|
|
{
|
|
public:
|
|
/**
|
|
* Class constructor.
|
|
*/
|
|
nsUnicodeToUTF16SameEndian( PRUnichar aBOM )
|
|
{
|
|
mBOM = aBOM;
|
|
};
|
|
|
|
/**
|
|
* Class destructor.
|
|
*/
|
|
virtual ~nsUnicodeToUTF16SameEndian() {};
|
|
|
|
//--------------------------------------------------------------------
|
|
// Interface nsIUnicodeEncoder [declaration]
|
|
|
|
NS_IMETHOD Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength,
|
|
char * aDest, PRInt32 * aDestLength)
|
|
{
|
|
PRInt32 srcInLen = *aSrcLength;
|
|
PRInt32 destInLen = *aDestLength;
|
|
PRInt32 srcOutLen = 0;
|
|
PRInt32 destOutLen = 0;
|
|
PRInt32 copyCharLen;
|
|
PRUnichar *p = (PRUnichar*)aDest;
|
|
|
|
// Handle BOM if necessary
|
|
if(0!=mBOM)
|
|
{
|
|
if(destInLen <2)
|
|
goto needmoreoutput;
|
|
|
|
*p++ = mBOM;
|
|
mBOM = 0;
|
|
destOutLen +=2;
|
|
}
|
|
// find out the length of copy
|
|
|
|
copyCharLen = srcInLen;
|
|
if(copyCharLen > (destInLen - destOutLen) / 2) {
|
|
copyCharLen = (destInLen - destOutLen) / 2;
|
|
}
|
|
|
|
// copy the data by swaping
|
|
CopyData((char*)p , aSrc, copyCharLen );
|
|
|
|
srcOutLen += copyCharLen;
|
|
destOutLen += copyCharLen * 2;
|
|
if(copyCharLen < srcInLen)
|
|
goto needmoreoutput;
|
|
|
|
*aSrcLength = srcOutLen;
|
|
*aDestLength = destOutLen;
|
|
return NS_OK;
|
|
|
|
needmoreoutput:
|
|
*aSrcLength = srcOutLen;
|
|
*aDestLength = destOutLen;
|
|
return NS_OK_UENC_MOREOUTPUT;
|
|
};
|
|
|
|
NS_IMETHOD GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength,
|
|
PRInt32 * aDestLength)
|
|
{
|
|
if(0 != mBOM)
|
|
*aDestLength = 2*(aSrcLength+1);
|
|
else
|
|
*aDestLength = 2*aSrcLength;
|
|
return NS_OK_UENC_EXACTLENGTH;
|
|
};
|
|
NS_IMETHOD Finish(char * aDest, PRInt32 * aDestLength)
|
|
{
|
|
if(0 != mBOM)
|
|
{
|
|
if(*aDestLength >= 2)
|
|
{
|
|
*((PRUnichar*)aDest)= mBOM;
|
|
mBOM=0;
|
|
*aDestLength = 2;
|
|
return NS_OK;
|
|
} else {
|
|
*aDestLength = 0;
|
|
return NS_OK; // xxx should be error
|
|
}
|
|
} else {
|
|
*aDestLength = 0;
|
|
return NS_OK;
|
|
}
|
|
};
|
|
NS_IMETHOD Reset()
|
|
{
|
|
mBOM = 0;
|
|
return NS_OK;
|
|
};
|
|
NS_IMETHOD SetOutputErrorBehavior(PRInt32 aBehavior,
|
|
nsIUnicharEncoder * aEncoder, PRUnichar aChar)
|
|
{
|
|
return NS_OK;
|
|
};
|
|
|
|
//--------------------------------------------------------------------
|
|
// Interface nsICharRepresentable [declaration]
|
|
NS_IMETHOD FillInfo(PRUint32 *aInfo)
|
|
{
|
|
::memset(aInfo, 0xFF, (0x10000L >> 3));
|
|
return NS_OK;
|
|
};
|
|
protected:
|
|
PRUnichar mBOM;
|
|
virtual void CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen )
|
|
{
|
|
::memcpy(aDest, (void*) aSrc, aLen * 2);
|
|
};
|
|
};
|
|
|
|
class nsUnicodeToUTF16DiffEndian: public nsUnicodeToUTF16SameEndian
|
|
{
|
|
public:
|
|
/**
|
|
* Class constructor.
|
|
*/
|
|
nsUnicodeToUTF16DiffEndian( PRUnichar aBOM )
|
|
: nsUnicodeToUTF16SameEndian(aBOM ) { };
|
|
|
|
/**
|
|
* Class destructor.
|
|
*/
|
|
virtual ~nsUnicodeToUTF16DiffEndian() {};
|
|
|
|
//--------------------------------------------------------------------
|
|
// Interface nsIUnicodeEncoder [declaration]
|
|
|
|
protected:
|
|
virtual void CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen )
|
|
{
|
|
PRUnichar *p = (PRUnichar*) aDest;
|
|
// copy the data by swaping
|
|
for(PRInt32 i=0; i < aLen; i++)
|
|
{
|
|
PRUnichar aChar = *aSrc++;
|
|
*p++ = (0x00FF & (aChar >> 8)) | (0xFF00 & (aChar << 8));
|
|
}
|
|
};
|
|
};
|
|
static char BOM[] = {(char)0xfe, (char)0xff};
|
|
#define IsBigEndian() (0xFEFF == *((PRUint16*)BOM))
|
|
nsresult NEW_UnicodeToUTF16BE(nsISupports **aResult)
|
|
{
|
|
if(IsBigEndian()) {
|
|
*aResult = (nsIUnicodeEncoder*)new nsUnicodeToUTF16SameEndian(0);
|
|
} else {
|
|
*aResult = (nsIUnicodeEncoder*)new nsUnicodeToUTF16DiffEndian(0);
|
|
}
|
|
return (NULL == *aResult) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
|
|
}
|
|
nsresult NEW_UnicodeToUTF16LE(nsISupports **aResult)
|
|
{
|
|
if(IsBigEndian()) {
|
|
*aResult = (nsIUnicodeEncoder*)new nsUnicodeToUTF16DiffEndian(0);
|
|
} else {
|
|
*aResult = (nsIUnicodeEncoder*)new nsUnicodeToUTF16SameEndian(0);
|
|
}
|
|
return (NULL == *aResult) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
|
|
}
|
|
nsresult NEW_UnicodeToUTF16(nsISupports **aResult)
|
|
{
|
|
*aResult = (nsIUnicodeEncoder*)new nsUnicodeToUTF16SameEndian(0xFEFF);
|
|
return (NULL == *aResult) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
|
|
}
|
|
|
|
//============== above code is obsolete ==============================
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16BE::Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength,
|
|
char * aDest, PRInt32 * aDestLength)
|
|
{
|
|
PRInt32 srcInLen = *aSrcLength;
|
|
PRInt32 destInLen = *aDestLength;
|
|
PRInt32 srcOutLen = 0;
|
|
PRInt32 destOutLen = 0;
|
|
PRInt32 copyCharLen;
|
|
PRUnichar *p = (PRUnichar*)aDest;
|
|
|
|
// Handle BOM if necessary
|
|
if(0!=mBOM)
|
|
{
|
|
if(destInLen <2)
|
|
goto needmoreoutput;
|
|
|
|
*p++ = mBOM;
|
|
mBOM = 0;
|
|
destOutLen +=2;
|
|
}
|
|
// find out the length of copy
|
|
|
|
copyCharLen = srcInLen;
|
|
if(copyCharLen > (destInLen - destOutLen) / 2) {
|
|
copyCharLen = (destInLen - destOutLen) / 2;
|
|
}
|
|
|
|
// copy the data by swaping
|
|
CopyData((char*)p , aSrc, copyCharLen );
|
|
|
|
srcOutLen += copyCharLen;
|
|
destOutLen += copyCharLen * 2;
|
|
if(copyCharLen < srcInLen)
|
|
goto needmoreoutput;
|
|
|
|
*aSrcLength = srcOutLen;
|
|
*aDestLength = destOutLen;
|
|
return NS_OK;
|
|
|
|
needmoreoutput:
|
|
*aSrcLength = srcOutLen;
|
|
*aDestLength = destOutLen;
|
|
return NS_OK_UENC_MOREOUTPUT;
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16BE::GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength,
|
|
PRInt32 * aDestLength)
|
|
{
|
|
if(0 != mBOM)
|
|
*aDestLength = 2*(aSrcLength+1);
|
|
else
|
|
*aDestLength = 2*aSrcLength;
|
|
return NS_OK_UENC_EXACTLENGTH;
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16BE::Finish(char * aDest, PRInt32 * aDestLength)
|
|
{
|
|
if(0 != mBOM)
|
|
{
|
|
if(*aDestLength >= 2)
|
|
{
|
|
*((PRUnichar*)aDest)= mBOM;
|
|
mBOM=0;
|
|
*aDestLength = 2;
|
|
return NS_OK;
|
|
} else {
|
|
*aDestLength = 0;
|
|
return NS_OK; // xxx should be error
|
|
}
|
|
} else {
|
|
*aDestLength = 0;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16BE::Reset()
|
|
{
|
|
mBOM = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16BE::SetOutputErrorBehavior(PRInt32 aBehavior,
|
|
nsIUnicharEncoder * aEncoder, PRUnichar aChar)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16BE::FillInfo(PRUint32 *aInfo)
|
|
{
|
|
::memset(aInfo, 0xFF, (0x10000L >> 3));
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16BE::CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen )
|
|
{
|
|
if(IsBigEndian()) {
|
|
//UnicodeToUTF16SameEndian
|
|
::memcpy(aDest, (void*) aSrc, aLen * 2);
|
|
}
|
|
else {
|
|
//UnicodeToUTF16DiffEndian
|
|
PRUnichar *p = (PRUnichar*) aDest;
|
|
// copy the data by swaping
|
|
for(PRInt32 i=0; i < aLen; i++)
|
|
{
|
|
PRUnichar aChar = *aSrc++;
|
|
*p++ = (0x00FF & (aChar >> 8)) | (0xFF00 & (aChar << 8));
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToUTF16LE::CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen )
|
|
{
|
|
if(!IsBigEndian()) {
|
|
//UnicodeToUTF16SameEndian
|
|
::memcpy(aDest, (void*) aSrc, aLen * 2);
|
|
}
|
|
else {
|
|
//UnicodeToUTF16DiffEndian
|
|
PRUnichar *p = (PRUnichar*) aDest;
|
|
// copy the data by swaping
|
|
for(PRInt32 i=0; i < aLen; i++)
|
|
{
|
|
PRUnichar aChar = *aSrc++;
|
|
*p++ = (0x00FF & (aChar >> 8)) | (0xFF00 & (aChar << 8));
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
|