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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /extensions/universalchardet/src/base/nsMBCSGroupProber.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'extensions/universalchardet/src/base/nsMBCSGroupProber.cpp')
-rw-r--r--extensions/universalchardet/src/base/nsMBCSGroupProber.cpp177
1 files changed, 177 insertions, 0 deletions
diff --git a/extensions/universalchardet/src/base/nsMBCSGroupProber.cpp b/extensions/universalchardet/src/base/nsMBCSGroupProber.cpp
new file mode 100644
index 000000000..b47691443
--- /dev/null
+++ b/extensions/universalchardet/src/base/nsMBCSGroupProber.cpp
@@ -0,0 +1,177 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include <stdio.h>
+
+#include "nsMBCSGroupProber.h"
+#include "nsUniversalDetector.h"
+
+#if defined(DEBUG_chardet) || defined(DEBUG_jgmyers)
+const char *ProberName[] =
+{
+ "UTF8",
+ "SJIS",
+ "EUCJP",
+};
+
+#endif
+
+nsMBCSGroupProber::nsMBCSGroupProber()
+{
+ mProbers[0] = new nsUTF8Prober();
+ mProbers[1] = new nsSJISProber();
+ mProbers[2] = new nsEUCJPProber();
+ Reset();
+}
+
+nsMBCSGroupProber::~nsMBCSGroupProber()
+{
+ for (uint32_t i = 0; i < NUM_OF_PROBERS; i++)
+ {
+ delete mProbers[i];
+ }
+}
+
+const char* nsMBCSGroupProber::GetCharSetName()
+{
+ if (mBestGuess == -1)
+ {
+ GetConfidence();
+ if (mBestGuess == -1)
+ mBestGuess = 0;
+ }
+ return mProbers[mBestGuess]->GetCharSetName();
+}
+
+void nsMBCSGroupProber::Reset(void)
+{
+ mActiveNum = 0;
+ for (uint32_t i = 0; i < NUM_OF_PROBERS; i++)
+ {
+ if (mProbers[i])
+ {
+ mProbers[i]->Reset();
+ mIsActive[i] = true;
+ ++mActiveNum;
+ }
+ else
+ mIsActive[i] = false;
+ }
+ mBestGuess = -1;
+ mState = eDetecting;
+ mKeepNext = 0;
+}
+
+nsProbingState nsMBCSGroupProber::HandleData(const char* aBuf, uint32_t aLen)
+{
+ nsProbingState st;
+ uint32_t start = 0;
+ uint32_t keepNext = mKeepNext;
+
+ //do filtering to reduce load to probers
+ for (uint32_t pos = 0; pos < aLen; ++pos)
+ {
+ if (aBuf[pos] & 0x80)
+ {
+ if (!keepNext)
+ start = pos;
+ keepNext = 2;
+ }
+ else if (keepNext)
+ {
+ if (--keepNext == 0)
+ {
+ for (uint32_t i = 0; i < NUM_OF_PROBERS; i++)
+ {
+ if (!mIsActive[i])
+ continue;
+ st = mProbers[i]->HandleData(aBuf + start, pos + 1 - start);
+ if (st == eFoundIt)
+ {
+ mBestGuess = i;
+ mState = eFoundIt;
+ return mState;
+ }
+ }
+ }
+ }
+ }
+
+ if (keepNext) {
+ for (uint32_t i = 0; i < NUM_OF_PROBERS; i++)
+ {
+ if (!mIsActive[i])
+ continue;
+ st = mProbers[i]->HandleData(aBuf + start, aLen - start);
+ if (st == eFoundIt)
+ {
+ mBestGuess = i;
+ mState = eFoundIt;
+ return mState;
+ }
+ }
+ }
+ mKeepNext = keepNext;
+
+ return mState;
+}
+
+float nsMBCSGroupProber::GetConfidence(void)
+{
+ uint32_t i;
+ float bestConf = 0.0, cf;
+
+ switch (mState)
+ {
+ case eFoundIt:
+ return (float)0.99;
+ case eNotMe:
+ return (float)0.01;
+ default:
+ for (i = 0; i < NUM_OF_PROBERS; i++)
+ {
+ if (!mIsActive[i])
+ continue;
+ cf = mProbers[i]->GetConfidence();
+ if (bestConf < cf)
+ {
+ bestConf = cf;
+ mBestGuess = i;
+ }
+ }
+ }
+ return bestConf;
+}
+
+#ifdef DEBUG_chardet
+void nsMBCSGroupProber::DumpStatus()
+{
+ uint32_t i;
+ float cf;
+
+ GetConfidence();
+ for (i = 0; i < NUM_OF_PROBERS; i++)
+ {
+ if (!mIsActive[i])
+ printf(" MBCS inactive: [%s] (confidence is too low).\r\n", ProberName[i]);
+ else
+ {
+ cf = mProbers[i]->GetConfidence();
+ printf(" MBCS %1.3f: [%s]\r\n", cf, ProberName[i]);
+ }
+ }
+}
+#endif
+
+#ifdef DEBUG_jgmyers
+void nsMBCSGroupProber::GetDetectorState(nsUniversalDetector::DetectorState (&states)[nsUniversalDetector::NumDetectors], uint32_t &offset)
+{
+ for (uint32_t i = 0; i < NUM_OF_PROBERS; ++i) {
+ states[offset].name = ProberName[i];
+ states[offset].isActive = mIsActive[i];
+ states[offset].confidence = mIsActive[i] ? mProbers[i]->GetConfidence() : 0.0;
+ ++offset;
+ }
+}
+#endif /* DEBUG_jgmyers */