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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.
*/
#ifndef nsCodingStateMachine_h__
#define nsCodingStateMachine_h__
#include "qencodingprober.h"
#include "nsPkgInt.h"
namespace qencodingprober {
typedef enum {
eStart = 0,
eError = 1,
eItsMe = 2
} nsSMState;
#define GETCLASS(c) GETFROMPCK(((unsigned char)(c)), mModel->classTable)
//state machine model
typedef struct
{
nsPkgInt classTable;
unsigned int classFactor;
nsPkgInt stateTable;
const unsigned int* charLenTable;
const char* name;
} SMModel;
class nsCodingStateMachine {
public:
nsCodingStateMachine(SMModel* sm){
mCurrentState = eStart;
mModel = sm;
};
nsSMState NextState(char c){
//for each byte we get its class , if it is first byte, we also get byte length
unsigned int byteCls = GETCLASS(c);
if (mCurrentState == eStart)
{
mCurrentBytePos = 0;
mCurrentCharLen = mModel->charLenTable[byteCls];
}
//from byte's class and stateTable, we get its next state
mCurrentState=(nsSMState)GETFROMPCK(mCurrentState*(mModel->classFactor)+byteCls,
mModel->stateTable);
mCurrentBytePos++;
return mCurrentState;
};
unsigned int GetCurrentCharLen(void) {return mCurrentCharLen;};
void Reset(void) {mCurrentState = eStart;};
const char * GetCodingStateMachine() {return mModel->name;};
#ifdef DEBUG_PROBE
const char * DumpCurrentState(){
switch (mCurrentState) {
case eStart:
return "eStart";
case eError:
return "eError";
case eItsMe:
return "eItsMe";
default:
return "OK";
}
}
#endif
protected:
nsSMState mCurrentState;
unsigned int mCurrentCharLen;
unsigned int mCurrentBytePos;
SMModel *mModel;
};
extern SMModel UTF8SMModel;
extern SMModel Big5SMModel;
extern SMModel EUCJPSMModel;
extern SMModel EUCKRSMModel;
extern SMModel EUCTWSMModel;
extern SMModel GB18030SMModel;
extern SMModel SJISSMModel;
extern SMModel UCS2LESMModel;
extern SMModel UCS2BESMModel;
extern SMModel HZSMModel;
extern SMModel ISO2022CNSMModel;
extern SMModel ISO2022JPSMModel;
extern SMModel ISO2022KRSMModel;
}
#endif /* nsCodingStateMachine_h__ */
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