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comparison: extensions/universalchardet/src/base/nsCodingStateMachine.h
extensions/universalchardet/src/base/nsCodingStateMachine.h
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:efc2f01abcc0 |
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| 1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 #ifndef nsCodingStateMachine_h__ | |
| 6 #define nsCodingStateMachine_h__ | |
| 7 | |
| 8 #include "mozilla/ArrayUtils.h" | |
| 9 | |
| 10 #include "nsPkgInt.h" | |
| 11 | |
| 12 typedef enum { | |
| 13 eStart = 0, | |
| 14 eError = 1, | |
| 15 eItsMe = 2 | |
| 16 } nsSMState; | |
| 17 | |
| 18 #define GETCLASS(c) GETFROMPCK(((unsigned char)(c)), mModel->classTable) | |
| 19 | |
| 20 //state machine model | |
| 21 typedef struct | |
| 22 { | |
| 23 nsPkgInt classTable; | |
| 24 uint32_t classFactor; | |
| 25 nsPkgInt stateTable; | |
| 26 const uint32_t* charLenTable; | |
| 27 #ifdef DEBUG | |
| 28 const size_t charLenTableLength; | |
| 29 #endif | |
| 30 const char* name; | |
| 31 } SMModel; | |
| 32 | |
| 33 class nsCodingStateMachine { | |
| 34 public: | |
| 35 nsCodingStateMachine(const SMModel* sm) : mModel(sm) { mCurrentState = eStart; } | |
| 36 nsSMState NextState(char c){ | |
| 37 //for each byte we get its class , if it is first byte, we also get byte length | |
| 38 uint32_t byteCls = GETCLASS(c); | |
| 39 if (mCurrentState == eStart) | |
| 40 { | |
| 41 mCurrentBytePos = 0; | |
| 42 MOZ_ASSERT(byteCls < mModel->charLenTableLength); | |
| 43 mCurrentCharLen = mModel->charLenTable[byteCls]; | |
| 44 } | |
| 45 //from byte's class and stateTable, we get its next state | |
| 46 mCurrentState=(nsSMState)GETFROMPCK(mCurrentState*(mModel->classFactor)+byteCls, | |
| 47 mModel->stateTable); | |
| 48 mCurrentBytePos++; | |
| 49 return mCurrentState; | |
| 50 } | |
| 51 uint32_t GetCurrentCharLen(void) {return mCurrentCharLen;} | |
| 52 void Reset(void) {mCurrentState = eStart;} | |
| 53 const char * GetCodingStateMachine() {return mModel->name;} | |
| 54 | |
| 55 protected: | |
| 56 nsSMState mCurrentState; | |
| 57 uint32_t mCurrentCharLen; | |
| 58 uint32_t mCurrentBytePos; | |
| 59 | |
| 60 const SMModel *mModel; | |
| 61 }; | |
| 62 | |
| 63 extern const SMModel UTF8SMModel; | |
| 64 extern const SMModel Big5SMModel; | |
| 65 extern const SMModel EUCJPSMModel; | |
| 66 extern const SMModel EUCKRSMModel; | |
| 67 extern const SMModel EUCTWSMModel; | |
| 68 extern const SMModel GB18030SMModel; | |
| 69 extern const SMModel SJISSMModel; | |
| 70 | |
| 71 | |
| 72 extern const SMModel HZSMModel; | |
| 73 extern const SMModel ISO2022CNSMModel; | |
| 74 extern const SMModel ISO2022JPSMModel; | |
| 75 extern const SMModel ISO2022KRSMModel; | |
| 76 | |
| 77 #undef CHAR_LEN_TABLE | |
| 78 #ifdef DEBUG | |
| 79 #define CHAR_LEN_TABLE(x) x, mozilla::ArrayLength(x) | |
| 80 #else | |
| 81 #define CHAR_LEN_TABLE(x) x | |
| 82 #endif | |
| 83 | |
| 84 #endif /* nsCodingStateMachine_h__ */ | |
| 85 |
