The Tor Browser / file comparison
comparison: extensions/universalchardet/src/base/nsUTF8Prober.cpp
extensions/universalchardet/src/base/nsUTF8Prober.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:f6a357459121 |
|---|---|
| 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 | |
| 6 #include "nsUTF8Prober.h" | |
| 7 | |
| 8 void nsUTF8Prober::Reset(void) | |
| 9 { | |
| 10 mCodingSM->Reset(); | |
| 11 mNumOfMBChar = 0; | |
| 12 mState = eDetecting; | |
| 13 } | |
| 14 | |
| 15 nsProbingState nsUTF8Prober::HandleData(const char* aBuf, uint32_t aLen) | |
| 16 { | |
| 17 nsSMState codingState; | |
| 18 | |
| 19 for (uint32_t i = 0; i < aLen; i++) | |
| 20 { | |
| 21 codingState = mCodingSM->NextState(aBuf[i]); | |
| 22 if (codingState == eItsMe) | |
| 23 { | |
| 24 mState = eFoundIt; | |
| 25 break; | |
| 26 } | |
| 27 if (codingState == eStart) | |
| 28 { | |
| 29 if (mCodingSM->GetCurrentCharLen() >= 2) | |
| 30 mNumOfMBChar++; | |
| 31 } | |
| 32 } | |
| 33 | |
| 34 if (mState == eDetecting) | |
| 35 if (GetConfidence() > SHORTCUT_THRESHOLD) | |
| 36 mState = eFoundIt; | |
| 37 return mState; | |
| 38 } | |
| 39 | |
| 40 #define ONE_CHAR_PROB (float)0.50 | |
| 41 | |
| 42 float nsUTF8Prober::GetConfidence(void) | |
| 43 { | |
| 44 float unlike = (float)0.99; | |
| 45 | |
| 46 if (mNumOfMBChar < 6) | |
| 47 { | |
| 48 for (uint32_t i = 0; i < mNumOfMBChar; i++) | |
| 49 unlike *= ONE_CHAR_PROB; | |
| 50 return (float)1.0 - unlike; | |
| 51 } | |
| 52 else | |
| 53 return (float)0.99; | |
| 54 } | |
| 55 |
