summaryrefslogtreecommitdiff
path: root/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsBig5Prober.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsBig5Prober.cpp')
-rw-r--r--libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsBig5Prober.cpp88
1 files changed, 88 insertions, 0 deletions
diff --git a/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsBig5Prober.cpp b/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsBig5Prober.cpp
new file mode 100644
index 0000000..7288eb1
--- /dev/null
+++ b/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsBig5Prober.cpp
@@ -0,0 +1,88 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsBig5Prober.h"
+
+void nsBig5Prober::Reset(void)
+{
+ mCodingSM->Reset();
+ mState = eDetecting;
+ mDistributionAnalyser.Reset();
+}
+
+nsProbingState nsBig5Prober::HandleData(const char* aBuf, PRUint32 aLen)
+{
+ nsSMState codingState;
+
+ for (PRUint32 i = 0; i < aLen; i++)
+ {
+ codingState = mCodingSM->NextState(aBuf[i]);
+ if (codingState == eItsMe)
+ {
+ mState = eFoundIt;
+ break;
+ }
+ if (codingState == eStart)
+ {
+ PRUint32 charLen = mCodingSM->GetCurrentCharLen();
+
+ if (i == 0)
+ {
+ mLastChar[1] = aBuf[0];
+ mDistributionAnalyser.HandleOneChar(mLastChar, charLen);
+ }
+ else
+ mDistributionAnalyser.HandleOneChar(aBuf+i-1, charLen);
+ }
+ }
+
+ mLastChar[0] = aBuf[aLen-1];
+
+ if (mState == eDetecting)
+ if (mDistributionAnalyser.GotEnoughData() && GetConfidence() > SHORTCUT_THRESHOLD)
+ mState = eFoundIt;
+
+ return mState;
+}
+
+float nsBig5Prober::GetConfidence(void)
+{
+ float distribCf = mDistributionAnalyser.GetConfidence();
+
+ return (float)distribCf;
+}
+