| 1 | /* |
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| 2 | The Original Code is mozilla.org code. |
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| 3 | |
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| 4 | SPDX-FileCopyrightText: 1998 Netscape Communications Corporation |
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| 5 | |
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| 6 | SPDX-License-Identifier: MPL-1.1 OR GPL-2.0-or-later OR LGPL-2.1-or-later |
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| 7 | */ |
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| 8 | |
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| 9 | // for S-JIS encoding, observe characteristic: |
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| 10 | // 1, kana character (or hankaku?) often have high frequency of appearance |
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| 11 | // 2, kana character often exist in group |
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| 12 | // 3, certain combination of kana is never used in japanese language |
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| 13 | |
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| 14 | #ifndef nsSJISProber_h__ |
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| 15 | #define nsSJISProber_h__ |
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| 16 | |
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| 17 | #include "CharDistribution.h" |
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| 18 | #include "JpCntx.h" |
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| 19 | #include "nsCharSetProber.h" |
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| 20 | #include "nsCodingStateMachine.h" |
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| 21 | |
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| 22 | namespace kencodingprober |
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| 23 | { |
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| 24 | class KCODECS_NO_EXPORT nsSJISProber : public nsCharSetProber |
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| 25 | { |
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| 26 | public: |
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| 27 | nsSJISProber(void) |
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| 28 | { |
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| 29 | mCodingSM = new nsCodingStateMachine(&SJISSMModel); |
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| 30 | Reset(); |
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| 31 | } |
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| 32 | ~nsSJISProber(void) override |
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| 33 | { |
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| 34 | delete mCodingSM; |
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| 35 | } |
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| 36 | nsProbingState HandleData(const char *aBuf, unsigned int aLen) override; |
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| 37 | const char *GetCharSetName() override |
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| 38 | { |
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| 39 | return "Shift_JIS" ; |
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| 40 | } |
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| 41 | nsProbingState GetState(void) override |
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| 42 | { |
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| 43 | return mState; |
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| 44 | } |
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| 45 | void Reset(void) override; |
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| 46 | float GetConfidence(void) override; |
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| 47 | |
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| 48 | protected: |
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| 49 | nsCodingStateMachine *mCodingSM; |
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| 50 | nsProbingState mState; |
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| 51 | |
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| 52 | SJISContextAnalysis mContextAnalyser; |
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| 53 | SJISDistributionAnalysis mDistributionAnalyser; |
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| 54 | |
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| 55 | char mLastChar[2]; |
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| 56 | }; |
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| 57 | } |
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| 58 | |
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| 59 | #endif /* nsSJISProber_h__ */ |
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| 60 | |
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