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nsEUCKRProber.cpp
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1/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* -*- C++ -*-
3* Copyright (C) 1998 <developer@mozilla.org>
4*
5*
6* Permission is hereby granted, free of charge, to any person obtaining
7* a copy of this software and associated documentation files (the
8* "Software"), to deal in the Software without restriction, including
9* without limitation the rights to use, copy, modify, merge, publish,
10* distribute, sublicense, and/or sell copies of the Software, and to
11* permit persons to whom the Software is furnished to do so, subject to
12* the following conditions:
13*
14* The above copyright notice and this permission notice shall be included
15* in all copies or substantial portions of the Software.
16*
17* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24*/
25
26#include "nsEUCKRProber.h"
27
28namespace kencodingprober {
29void nsEUCKRProber::Reset(void)
30{
31 mCodingSM->Reset();
32 mState = eDetecting;
33 mDistributionAnalyser.Reset();
34 //mContextAnalyser.Reset();
35}
36
37nsProbingState nsEUCKRProber::HandleData(const char* aBuf, unsigned int aLen)
38{
39 nsSMState codingState;
40
41 for (unsigned int i = 0; i < aLen; i++)
42 {
43 codingState = mCodingSM->NextState(aBuf[i]);
44 if (codingState == eError)
45 {
46 mState = eNotMe;
47 break;
48 }
49 if (codingState == eItsMe)
50 {
51 mState = eFoundIt;
52 break;
53 }
54 if (codingState == eStart)
55 {
56 unsigned int charLen = mCodingSM->GetCurrentCharLen();
57
58 if (i == 0)
59 {
60 mLastChar[1] = aBuf[0];
61 mDistributionAnalyser.HandleOneChar(mLastChar, charLen);
62 }
63 else
64 mDistributionAnalyser.HandleOneChar(aBuf+i-1, charLen);
65 }
66 }
67
68 mLastChar[0] = aBuf[aLen-1];
69
70 if (mState == eDetecting)
71 if (mDistributionAnalyser.GotEnoughData() && GetConfidence() > SHORTCUT_THRESHOLD)
72 mState = eFoundIt;
73// else
74// mDistributionAnalyser.HandleData(aBuf, aLen);
75
76 return mState;
77}
78
79float nsEUCKRProber::GetConfidence(void)
80{
81 float distribCf = mDistributionAnalyser.GetConfidence();
82
83 return (float)distribCf;
84}
85}
86
87
kencodingprober::CharDistributionAnalysis::HandleOneChar
void HandleOneChar(const char *aStr, unsigned int aCharLen)
Definition: CharDistribution.h:44
kencodingprober::CharDistributionAnalysis::Reset
void Reset(void)
Definition: CharDistribution.h:67
kencodingprober::CharDistributionAnalysis::GetConfidence
float GetConfidence()
Definition: CharDistribution.cpp:39
kencodingprober::CharDistributionAnalysis::GotEnoughData
bool GotEnoughData()
Definition: CharDistribution.h:80
kencodingprober::nsCodingStateMachine::NextState
nsSMState NextState(char c)
Definition: nsCodingStateMachine.h:59
kencodingprober::nsCodingStateMachine::Reset
void Reset(void)
Definition: nsCodingStateMachine.h:74
kencodingprober::nsCodingStateMachine::GetCurrentCharLen
unsigned int GetCurrentCharLen(void)
Definition: nsCodingStateMachine.h:73
kencodingprober::nsEUCKRProber::Reset
void Reset(void)
Definition: nsEUCKRProber.cpp:29
kencodingprober::nsEUCKRProber::mCodingSM
nsCodingStateMachine * mCodingSM
Definition: nsEUCKRProber.h:48
kencodingprober::nsEUCKRProber::mState
nsProbingState mState
Definition: nsEUCKRProber.h:49
kencodingprober::nsEUCKRProber::mLastChar
char mLastChar[2]
Definition: nsEUCKRProber.h:53
kencodingprober::nsEUCKRProber::HandleData
nsProbingState HandleData(const char *aBuf, unsigned int aLen)
Definition: nsEUCKRProber.cpp:37
kencodingprober::nsEUCKRProber::mDistributionAnalyser
EUCKRDistributionAnalysis mDistributionAnalyser
Definition: nsEUCKRProber.h:52
kencodingprober::nsEUCKRProber::GetConfidence
float GetConfidence(void)
Definition: nsEUCKRProber.cpp:79
kencodingprober
Definition: CharDistribution.cpp:37
kencodingprober::nsProbingState
nsProbingState
Definition: nsCharSetProber.h:34
kencodingprober::eNotMe
@ eNotMe
Definition: nsCharSetProber.h:37
kencodingprober::eFoundIt
@ eFoundIt
Definition: nsCharSetProber.h:36
kencodingprober::eDetecting
@ eDetecting
Definition: nsCharSetProber.h:35
kencodingprober::nsSMState
nsSMState
Definition: nsCodingStateMachine.h:35
kencodingprober::eItsMe
@ eItsMe
Definition: nsCodingStateMachine.h:38
kencodingprober::eError
@ eError
Definition: nsCodingStateMachine.h:37
kencodingprober::eStart
@ eStart
Definition: nsCodingStateMachine.h:36
SHORTCUT_THRESHOLD
#define SHORTCUT_THRESHOLD
Definition: nsCharSetProber.h:40
nsEUCKRProber.h
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