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37 :
38 :
39 : #include "nsEscCharsetProber.h"
40 : #include "nsUniversalDetector.h"
41 :
42 0 : nsEscCharSetProber::nsEscCharSetProber(PRUint32 aLanguageFilter)
43 : {
44 0 : for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
45 0 : mCodingSM[i] = nsnull;
46 0 : if (aLanguageFilter & NS_FILTER_CHINESE_SIMPLIFIED)
47 : {
48 0 : mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);
49 0 : mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);
50 : }
51 0 : if (aLanguageFilter & NS_FILTER_JAPANESE)
52 0 : mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);
53 0 : if (aLanguageFilter & NS_FILTER_KOREAN)
54 0 : mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);
55 0 : mActiveSM = NUM_OF_ESC_CHARSETS;
56 0 : mState = eDetecting;
57 0 : mDetectedCharset = nsnull;
58 0 : }
59 :
60 0 : nsEscCharSetProber::~nsEscCharSetProber(void)
61 : {
62 0 : for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
63 0 : delete mCodingSM[i];
64 0 : }
65 :
66 0 : void nsEscCharSetProber::Reset(void)
67 : {
68 0 : mState = eDetecting;
69 0 : for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
70 0 : if (mCodingSM[i])
71 0 : mCodingSM[i]->Reset();
72 0 : mActiveSM = NUM_OF_ESC_CHARSETS;
73 0 : mDetectedCharset = nsnull;
74 0 : }
75 :
76 0 : nsProbingState nsEscCharSetProber::HandleData(const char* aBuf, PRUint32 aLen)
77 : {
78 : nsSMState codingState;
79 : PRInt32 j;
80 : PRUint32 i;
81 :
82 0 : for ( i = 0; i < aLen && mState == eDetecting; i++)
83 : {
84 0 : for (j = mActiveSM-1; j>= 0; j--)
85 : {
86 0 : if (mCodingSM[j])
87 : {
88 0 : codingState = mCodingSM[j]->NextState(aBuf[i]);
89 0 : if (codingState == eItsMe)
90 : {
91 0 : mState = eFoundIt;
92 0 : mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();
93 0 : return mState;
94 : }
95 : }
96 : }
97 : }
98 :
99 0 : return mState;
100 : }
101 :
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