| 1 | /* -*- C++ -*- |
|---|---|
| 2 | SPDX-FileCopyrightText: 1998 Netscape Communications Corporation <developer@mozilla.org> |
| 3 | |
| 4 | SPDX-License-Identifier: MIT |
| 5 | */ |
| 6 | |
| 7 | #include "nsBig5Prober.h" |
| 8 | |
| 9 | namespace kencodingprober |
| 10 | { |
| 11 | void nsBig5Prober::Reset(void) |
| 12 | { |
| 13 | mCodingSM->Reset(); |
| 14 | mState = eDetecting; |
| 15 | mDistributionAnalyser.Reset(); |
| 16 | } |
| 17 | |
| 18 | nsProbingState nsBig5Prober::HandleData(const char *aBuf, unsigned int aLen) |
| 19 | { |
| 20 | if (aLen == 0) { |
| 21 | return mState; |
| 22 | } |
| 23 | |
| 24 | for (unsigned int i = 0; i < aLen; i++) { |
| 25 | const nsSMState codingState = mCodingSM->NextState(c: aBuf[i]); |
| 26 | if (codingState == eError) { |
| 27 | mState = eNotMe; |
| 28 | break; |
| 29 | } |
| 30 | if (codingState == eItsMe) { |
| 31 | mState = eFoundIt; |
| 32 | break; |
| 33 | } |
| 34 | if (codingState == eStart) { |
| 35 | unsigned int charLen = mCodingSM->GetCurrentCharLen(); |
| 36 | |
| 37 | if (i == 0) { |
| 38 | mLastChar[1] = aBuf[0]; |
| 39 | mDistributionAnalyser.HandleOneChar(aStr: mLastChar, aCharLen: charLen); |
| 40 | } else { |
| 41 | mDistributionAnalyser.HandleOneChar(aStr: aBuf + i - 1, aCharLen: charLen); |
| 42 | } |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | mLastChar[0] = aBuf[aLen - 1]; |
| 47 | |
| 48 | if (mState == eDetecting) { |
| 49 | if (mDistributionAnalyser.GotEnoughData() && GetConfidence() > SHORTCUT_THRESHOLD) { |
| 50 | mState = eFoundIt; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | return mState; |
| 55 | } |
| 56 | |
| 57 | float nsBig5Prober::GetConfidence(void) |
| 58 | { |
| 59 | float distribCf = mDistributionAnalyser.GetConfidence(); |
| 60 | |
| 61 | return (float)distribCf; |
| 62 | } |
| 63 | } |
| 64 |