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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* -*- C++ -*-
* Copyright (C) 1998 <developer@mozilla.org>
*
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "nsEscCharsetProber.h"
namespace qencodingprober {
nsEscCharSetProber::nsEscCharSetProber(void)
{
mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);
mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);
mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);
mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);
mActiveSM = NUM_OF_ESC_CHARSETS;
mState = eDetecting;
mDetectedCharset = 0;
}
nsEscCharSetProber::~nsEscCharSetProber(void)
{
for (unsigned int i = 0; i < NUM_OF_ESC_CHARSETS; i++)
delete mCodingSM[i];
}
void nsEscCharSetProber::Reset(void)
{
mState = eDetecting;
for (unsigned int i = 0; i < NUM_OF_ESC_CHARSETS; i++)
mCodingSM[i]->Reset();
mActiveSM = NUM_OF_ESC_CHARSETS;
mDetectedCharset = 0;
}
nsProbingState nsEscCharSetProber::HandleData(const char* aBuf, unsigned int aLen)
{
nsSMState codingState;
int j;
unsigned int i;
for ( i = 0; i < aLen && mState == eDetecting; i++)
{
for (j = mActiveSM-1; j>= 0; j--)
{
//byte is feed to all active state machine
codingState = mCodingSM[j]->NextState(aBuf[i]);
if (codingState == eError)
{
//got negative answer for this state machine, make it inactive
mActiveSM--;
if (mActiveSM == 0)
{
mState = eNotMe;
return mState;
}
else if (j != (int)mActiveSM)
{
nsCodingStateMachine* t;
t = mCodingSM[mActiveSM];
mCodingSM[mActiveSM] = mCodingSM[j];
mCodingSM[j] = t;
}
}
else if (codingState == eItsMe)
{
mState = eFoundIt;
mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();
return mState;
}
}
}
return mState;
}
}
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