gecko-dev/intl/uconv/ucvlatin/nsUnicodeToUTF8.cpp

72 строки
2.5 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 "nsUnicodeToUTF8.h"
#include <string.h>
//----------------------------------------------------------------------
// Global functions and data [declaration]
static PRUint16 g_UTF8MappingTable[] = {
0x0001, 0x0004, 0x0005, 0x0008, 0x0000, 0x0000, 0xFFFF, 0x0000
};
static PRInt16 g_UTF8ShiftTable[] = {
3, uMultibytesCharset,
ShiftCell(u1ByteChar, 1, 0x00, 0x7F, 0x00, 0x00, 0x00, 0x7F),
ShiftCell(u2BytesUTF8, 2, 0xC0, 0xDF, 0x00, 0x00, 0x07, 0xFF),
ShiftCell(u3BytesUTF8, 3, 0xE0, 0xEF, 0x08, 0x00, 0xFF, 0xFF)
};
//----------------------------------------------------------------------
// Class nsUnicodeToUTF8 [implementation]
nsUnicodeToUTF8::nsUnicodeToUTF8()
: nsTableEncoderSupport((uShiftTable*) &g_UTF8ShiftTable,
(uMappingTable*) &g_UTF8MappingTable)
{
}
nsresult nsUnicodeToUTF8::CreateInstance(nsISupports ** aResult)
{
*aResult = (nsIUnicodeEncoder*) new nsUnicodeToUTF8();
return (*aResult == NULL)? NS_ERROR_OUT_OF_MEMORY : NS_OK;
}
//----------------------------------------------------------------------
// Subclassing of nsTableEncoderSupport class [implementation]
NS_IMETHODIMP nsUnicodeToUTF8::GetMaxLength(const PRUnichar * aSrc,
PRInt32 aSrcLength,
PRInt32 * aDestLength)
{
// in theory it should be 6, but since we do not handle
// UCS4 and UTF-16 here. It is 3. We should change it to 6 when we
// support UCS4 or UTF-16
*aDestLength = 3*aSrcLength;
return NS_OK;
}
NS_IMETHODIMP nsUnicodeToUTF8::FillInfo(PRUint32 *aInfo)
{
memset(aInfo, 0xFF, (0x10000L >> 3));
return NS_OK;
}