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37 :
38 : #include "nsBig5Prober.h"
39 : #include "nsDebug.h"
40 :
41 0 : void nsBig5Prober::Reset(void)
42 : {
43 0 : mCodingSM->Reset();
44 0 : mState = eDetecting;
45 0 : mDistributionAnalyser.Reset(mIsPreferredLanguage);
46 0 : }
47 :
48 0 : nsProbingState nsBig5Prober::HandleData(const char* aBuf, PRUint32 aLen)
49 : {
50 0 : NS_ASSERTION(aLen, "HandleData called with empty buffer");
51 : nsSMState codingState;
52 :
53 0 : for (PRUint32 i = 0; i < aLen; i++)
54 : {
55 0 : codingState = mCodingSM->NextState(aBuf[i]);
56 0 : if (codingState == eItsMe)
57 : {
58 0 : mState = eFoundIt;
59 0 : break;
60 : }
61 0 : if (codingState == eStart)
62 : {
63 0 : PRUint32 charLen = mCodingSM->GetCurrentCharLen();
64 :
65 0 : if (i == 0)
66 : {
67 0 : mLastChar[1] = aBuf[0];
68 0 : mDistributionAnalyser.HandleOneChar(mLastChar, charLen);
69 : }
70 : else
71 0 : mDistributionAnalyser.HandleOneChar(aBuf+i-1, charLen);
72 : }
73 : }
74 :
75 0 : mLastChar[0] = aBuf[aLen-1];
76 :
77 0 : if (mState == eDetecting)
78 0 : if (mDistributionAnalyser.GotEnoughData() && GetConfidence() > SHORTCUT_THRESHOLD)
79 0 : mState = eFoundIt;
80 :
81 0 : return mState;
82 : }
83 :
84 0 : float nsBig5Prober::GetConfidence(void)
85 : {
86 0 : float distribCf = mDistributionAnalyser.GetConfidence();
87 :
88 0 : return (float)distribCf;
89 : }
90 :
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