mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
117 lines
3.2 KiB
C++
117 lines
3.2 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
/**
|
|
* A character set converter from Unicode to HZ.
|
|
*
|
|
*
|
|
* @created 08/Sept/1999
|
|
* @author Yueheng Xu, Yueheng.Xu@intel.com
|
|
* Revision History
|
|
* 04/Oct/1999. Yueheng Xu: Fixed line continuation problem when line
|
|
* ended by '~';
|
|
* Used table UnicodeToGBK[] to speed up the mapping.
|
|
*/
|
|
#include "nsUnicodeToHZ.h"
|
|
#include "gbku.h"
|
|
//----------------------------------------------------------------------
|
|
// Class nsUnicodeToGBK [implementation]
|
|
#define HZ_STATE_GB 1
|
|
#define HZ_STATE_ASCII 2
|
|
#define HZ_STATE_TILD 3
|
|
#define HZLEAD1 '~'
|
|
#define HZLEAD2 '{'
|
|
#define HZLEAD3 '}'
|
|
#define UNICODE_TILD 0x007E
|
|
nsUnicodeToHZ::nsUnicodeToHZ() : nsEncoderSupport(6)
|
|
{
|
|
mHZState = HZ_STATE_ASCII; // per HZ spec, default to HZ mode
|
|
}
|
|
NS_IMETHODIMP nsUnicodeToHZ::ConvertNoBuff(
|
|
const PRUnichar * aSrc,
|
|
int32_t * aSrcLength,
|
|
char * aDest,
|
|
int32_t * aDestLength)
|
|
{
|
|
int32_t i=0;
|
|
int32_t iSrcLength = *aSrcLength;
|
|
int32_t iDestLength = 0;
|
|
|
|
for (i=0;i< iSrcLength;i++)
|
|
{
|
|
if(! IS_ASCII(*aSrc))
|
|
{
|
|
// hi byte has something, it is not ASCII, process as a GB
|
|
if ( mHZState != HZ_STATE_GB )
|
|
{
|
|
// we are adding a '~{' ESC sequence to star a HZ string
|
|
mHZState = HZ_STATE_GB;
|
|
aDest[0] = '~';
|
|
aDest[1] = '{';
|
|
aDest += 2; // increment 2 bytes
|
|
iDestLength +=2;
|
|
}
|
|
if(mUtil.UnicodeToGBKChar(*aSrc, true, &aDest[0], &aDest[1])) {
|
|
aDest += 2; // increment 2 bytes
|
|
iDestLength +=2;
|
|
} else {
|
|
// some thing that we cannot convert
|
|
// xxx fix me ftang
|
|
// error handling here
|
|
}
|
|
} else {
|
|
// this is an ASCII
|
|
|
|
// if we are in HZ mode, end it by adding a '~}' ESC sequence
|
|
if ( mHZState == HZ_STATE_GB )
|
|
{
|
|
mHZState = HZ_STATE_ASCII;
|
|
aDest[0] = '~';
|
|
aDest[1] = '}';
|
|
aDest += 2; // increment 2 bytes
|
|
iDestLength +=2;
|
|
}
|
|
|
|
// if this is a regular char '~' , convert it to two '~'
|
|
if ( *aSrc == UNICODE_TILD )
|
|
{
|
|
aDest[0] = '~';
|
|
aDest[1] = '~';
|
|
aDest += 2; // increment 2 bytes
|
|
iDestLength +=2;
|
|
} else {
|
|
// other regular ASCII chars convert by normal ways
|
|
|
|
// Is this works for both little endian and big endian machines ?
|
|
*aDest = (char) ( (PRUnichar)(*aSrc) );
|
|
aDest++; // increment 1 byte
|
|
iDestLength +=1;
|
|
}
|
|
}
|
|
aSrc++; // increment 2 bytes
|
|
if ( iDestLength >= (*aDestLength) )
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
*aDestLength = iDestLength;
|
|
*aSrcLength = i;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsUnicodeToHZ::FinishNoBuff(char * aDest, int32_t * aDestLength)
|
|
{
|
|
if ( mHZState == HZ_STATE_GB )
|
|
{
|
|
// if we are in HZ mode, end it by adding a '~}' ESC sequence
|
|
mHZState = HZ_STATE_ASCII;
|
|
aDest[0] = '~';
|
|
aDest[1] = '}';
|
|
*aDestLength = 2;
|
|
} else {
|
|
*aDestLength = 0;
|
|
}
|
|
return NS_OK;
|
|
}
|