1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/extensions/universalchardet/src/base/nsCodingStateMachine.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,85 @@
1.4 +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +#ifndef nsCodingStateMachine_h__
1.9 +#define nsCodingStateMachine_h__
1.10 +
1.11 +#include "mozilla/ArrayUtils.h"
1.12 +
1.13 +#include "nsPkgInt.h"
1.14 +
1.15 +typedef enum {
1.16 + eStart = 0,
1.17 + eError = 1,
1.18 + eItsMe = 2
1.19 +} nsSMState;
1.20 +
1.21 +#define GETCLASS(c) GETFROMPCK(((unsigned char)(c)), mModel->classTable)
1.22 +
1.23 +//state machine model
1.24 +typedef struct
1.25 +{
1.26 + nsPkgInt classTable;
1.27 + uint32_t classFactor;
1.28 + nsPkgInt stateTable;
1.29 + const uint32_t* charLenTable;
1.30 +#ifdef DEBUG
1.31 + const size_t charLenTableLength;
1.32 +#endif
1.33 + const char* name;
1.34 +} SMModel;
1.35 +
1.36 +class nsCodingStateMachine {
1.37 +public:
1.38 + nsCodingStateMachine(const SMModel* sm) : mModel(sm) { mCurrentState = eStart; }
1.39 + nsSMState NextState(char c){
1.40 + //for each byte we get its class , if it is first byte, we also get byte length
1.41 + uint32_t byteCls = GETCLASS(c);
1.42 + if (mCurrentState == eStart)
1.43 + {
1.44 + mCurrentBytePos = 0;
1.45 + MOZ_ASSERT(byteCls < mModel->charLenTableLength);
1.46 + mCurrentCharLen = mModel->charLenTable[byteCls];
1.47 + }
1.48 + //from byte's class and stateTable, we get its next state
1.49 + mCurrentState=(nsSMState)GETFROMPCK(mCurrentState*(mModel->classFactor)+byteCls,
1.50 + mModel->stateTable);
1.51 + mCurrentBytePos++;
1.52 + return mCurrentState;
1.53 + }
1.54 + uint32_t GetCurrentCharLen(void) {return mCurrentCharLen;}
1.55 + void Reset(void) {mCurrentState = eStart;}
1.56 + const char * GetCodingStateMachine() {return mModel->name;}
1.57 +
1.58 +protected:
1.59 + nsSMState mCurrentState;
1.60 + uint32_t mCurrentCharLen;
1.61 + uint32_t mCurrentBytePos;
1.62 +
1.63 + const SMModel *mModel;
1.64 +};
1.65 +
1.66 +extern const SMModel UTF8SMModel;
1.67 +extern const SMModel Big5SMModel;
1.68 +extern const SMModel EUCJPSMModel;
1.69 +extern const SMModel EUCKRSMModel;
1.70 +extern const SMModel EUCTWSMModel;
1.71 +extern const SMModel GB18030SMModel;
1.72 +extern const SMModel SJISSMModel;
1.73 +
1.74 +
1.75 +extern const SMModel HZSMModel;
1.76 +extern const SMModel ISO2022CNSMModel;
1.77 +extern const SMModel ISO2022JPSMModel;
1.78 +extern const SMModel ISO2022KRSMModel;
1.79 +
1.80 +#undef CHAR_LEN_TABLE
1.81 +#ifdef DEBUG
1.82 +#define CHAR_LEN_TABLE(x) x, mozilla::ArrayLength(x)
1.83 +#else
1.84 +#define CHAR_LEN_TABLE(x) x
1.85 +#endif
1.86 +
1.87 +#endif /* nsCodingStateMachine_h__ */
1.88 +
