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nsEscCharsetProber.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 "nsEscCharsetProber.h"
27
28namespace kencodingprober {
29nsEscCharSetProber::nsEscCharSetProber(void)
30{
31 mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);
32 mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);
33 mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);
34 mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);
35 mActiveSM = NUM_OF_ESC_CHARSETS;
36 mState = eDetecting;
37 mDetectedCharset = 0;
38}
39
40nsEscCharSetProber::~nsEscCharSetProber(void)
41{
42 for (unsigned int i = 0; i < NUM_OF_ESC_CHARSETS; i++)
43 delete mCodingSM[i];
44}
45
46void nsEscCharSetProber::Reset(void)
47{
48 mState = eDetecting;
49 for (unsigned int i = 0; i < NUM_OF_ESC_CHARSETS; i++)
50 mCodingSM[i]->Reset();
51 mActiveSM = NUM_OF_ESC_CHARSETS;
52 mDetectedCharset = 0;
53}
54
55nsProbingState nsEscCharSetProber::HandleData(const char* aBuf, unsigned int aLen)
56{
57 nsSMState codingState;
58 int j;
59 unsigned int i;
60
61 for ( i = 0; i < aLen && mState == eDetecting; i++)
62 {
63 for (j = mActiveSM-1; j>= 0; j--)
64 {
65 //byte is feed to all active state machine
66 codingState = mCodingSM[j]->NextState(aBuf[i]);
67 if (codingState == eError)
68 {
69 //got negative answer for this state machine, make it inactive
70 mActiveSM--;
71 if (mActiveSM == 0)
72 {
73 mState = eNotMe;
74 return mState;
75 }
76 else if (j != (int)mActiveSM)
77 {
78 nsCodingStateMachine* t;
79 t = mCodingSM[mActiveSM];
80 mCodingSM[mActiveSM] = mCodingSM[j];
81 mCodingSM[j] = t;
82 }
83 }
84 else if (codingState == eItsMe)
85 {
86 mState = eFoundIt;
87 mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();
88 return mState;
89 }
90 }
91 }
92
93 return mState;
94}
95}
96
97
kencodingprober::nsCodingStateMachine
Definition: nsCodingStateMachine.h:53
kencodingprober::nsCodingStateMachine::NextState
nsSMState NextState(char c)
Definition: nsCodingStateMachine.h:59
kencodingprober::nsCodingStateMachine::GetCodingStateMachine
const char * GetCodingStateMachine()
Definition: nsCodingStateMachine.h:75
kencodingprober::nsEscCharSetProber::~nsEscCharSetProber
virtual ~nsEscCharSetProber(void)
Definition: nsEscCharsetProber.cpp:40
kencodingprober::nsEscCharSetProber::mDetectedCharset
const char * mDetectedCharset
Definition: nsEscCharsetProber.h:51
kencodingprober::nsEscCharSetProber::HandleData
nsProbingState HandleData(const char *aBuf, unsigned int aLen)
Definition: nsEscCharsetProber.cpp:55
kencodingprober::nsEscCharSetProber::nsEscCharSetProber
nsEscCharSetProber(void)
Definition: nsEscCharsetProber.cpp:29
kencodingprober::nsEscCharSetProber::mState
nsProbingState mState
Definition: nsEscCharsetProber.h:50
kencodingprober::nsEscCharSetProber::mActiveSM
unsigned int mActiveSM
Definition: nsEscCharsetProber.h:49
kencodingprober::nsEscCharSetProber::Reset
void Reset(void)
Definition: nsEscCharsetProber.cpp:46
kencodingprober::nsEscCharSetProber::mCodingSM
nsCodingStateMachine * mCodingSM[NUM_OF_ESC_CHARSETS]
Definition: nsEscCharsetProber.h:48
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::ISO2022JPSMModel
KDE_NO_EXPORT SMModel ISO2022JPSMModel
Definition: nsEscSM.cpp:192
kencodingprober::ISO2022KRSMModel
KDE_NO_EXPORT SMModel ISO2022KRSMModel
Definition: nsEscSM.cpp:246
kencodingprober::HZSMModel
KDE_NO_EXPORT SMModel HZSMModel
Definition: nsEscSM.cpp:76
kencodingprober::nsSMState
nsSMState
Definition: nsCodingStateMachine.h:35
kencodingprober::eItsMe
@ eItsMe
Definition: nsCodingStateMachine.h:38
kencodingprober::eError
@ eError
Definition: nsCodingStateMachine.h:37
kencodingprober::ISO2022CNSMModel
KDE_NO_EXPORT SMModel ISO2022CNSMModel
Definition: nsEscSM.cpp:134
nsEscCharsetProber.h
NUM_OF_ESC_CHARSETS
#define NUM_OF_ESC_CHARSETS
Definition: nsEscCharsetProber.h:32
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