From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 intl/chardet/nsCyrillicDetector.cpp | 160 ++++++++++++++++++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 intl/chardet/nsCyrillicDetector.cpp

(limited to 'intl/chardet/nsCyrillicDetector.cpp')

diff --git a/intl/chardet/nsCyrillicDetector.cpp b/intl/chardet/nsCyrillicDetector.cpp
new file mode 100644
index 000000000..feebeed65
--- /dev/null
+++ b/intl/chardet/nsCyrillicDetector.cpp
@@ -0,0 +1,160 @@
+/* -*- 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 "nscore.h"
+#include "nsCyrillicProb.h"
+#include <stdio.h>
+
+#include "nsCOMPtr.h"
+#include "nsISupports.h"
+#include "nsICharsetDetector.h"
+#include "nsICharsetDetectionObserver.h"
+#include "nsIStringCharsetDetector.h"
+#include "nsCyrillicDetector.h"
+
+//----------------------------------------------------------------------
+// Interface nsISupports [implementation]
+NS_IMPL_ISUPPORTS(nsCyrXPCOMDetector, nsICharsetDetector)
+NS_IMPL_ISUPPORTS(nsCyrXPCOMStringDetector, nsIStringCharsetDetector)
+
+void nsCyrillicDetector::HandleData(const char* aBuf, uint32_t aLen)
+{
+   uint8_t cls;
+   const char* b;
+   uint32_t i;
+   if(mDone) 
+      return;
+   for(i=0, b=aBuf;i<aLen;i++,b++)
+   {
+     for(unsigned j=0;j<mItems;j++)
+     {
+        if( 0x80 & *b)
+           cls = mCyrillicClass[j][(*b) & 0x7F];
+        else 
+           cls = 0;
+        NS_ASSERTION( cls <= 32 , "illegal character class");
+        mProb[j] += gCyrillicProb[mLastCls[j]][cls];
+        mLastCls[j] = cls;
+     } 
+   }
+   // We now only based on the first block we receive
+   DataEnd();
+}
+
+//---------------------------------------------------------------------
+#define THRESHOLD_RATIO 1.5f
+void nsCyrillicDetector::DataEnd()
+{
+   uint32_t max=0;
+   uint8_t  maxIdx=0;
+   uint8_t j;
+   if(mDone) 
+      return;
+   for(j=0;j<mItems;j++) {
+      if(mProb[j] > max)
+      {
+           max = mProb[j];
+           maxIdx= j;
+      }
+   }
+
+   if( 0 == max ) // if we didn't get any 8 bits data 
+     return;
+
+#ifdef DEBUG
+   for(j=0;j<mItems;j++) 
+      printf("Charset %s->\t%d\n", mCharsets[j], mProb[j]);
+#endif
+   this->Report(mCharsets[maxIdx]);
+   mDone = true;
+}
+
+//---------------------------------------------------------------------
+nsCyrXPCOMDetector:: nsCyrXPCOMDetector(uint8_t aItems, 
+                      const uint8_t ** aCyrillicClass, 
+                      const char **aCharsets)
+	     : nsCyrillicDetector(aItems, aCyrillicClass, aCharsets)
+{
+    mObserver = nullptr;
+}
+
+//---------------------------------------------------------------------
+nsCyrXPCOMDetector::~nsCyrXPCOMDetector() 
+{
+}
+
+//---------------------------------------------------------------------
+NS_IMETHODIMP nsCyrXPCOMDetector::Init(
+  nsICharsetDetectionObserver* aObserver)
+{
+  NS_ASSERTION(mObserver == nullptr , "Init twice");
+  if(nullptr == aObserver)
+     return NS_ERROR_ILLEGAL_VALUE;
+
+  mObserver = aObserver;
+  return NS_OK;
+}
+
+//----------------------------------------------------------
+NS_IMETHODIMP nsCyrXPCOMDetector::DoIt(
+  const char* aBuf, uint32_t aLen, bool* oDontFeedMe)
+{
+  NS_ASSERTION(mObserver != nullptr , "have not init yet");
+
+  if((nullptr == aBuf) || (nullptr == oDontFeedMe))
+     return NS_ERROR_ILLEGAL_VALUE;
+
+  this->HandleData(aBuf, aLen);
+  *oDontFeedMe = false;
+  return NS_OK;
+}
+
+//----------------------------------------------------------
+NS_IMETHODIMP nsCyrXPCOMDetector::Done()
+{
+  NS_ASSERTION(mObserver != nullptr , "have not init yet");
+  this->DataEnd();
+  return NS_OK;
+}
+
+//----------------------------------------------------------
+void nsCyrXPCOMDetector::Report(const char* aCharset)
+{
+  NS_ASSERTION(mObserver != nullptr , "have not init yet");
+  mObserver->Notify(aCharset, eBestAnswer);
+}
+
+//---------------------------------------------------------------------
+nsCyrXPCOMStringDetector:: nsCyrXPCOMStringDetector(uint8_t aItems, 
+                      const uint8_t ** aCyrillicClass, 
+                      const char **aCharsets)
+	     : nsCyrillicDetector(aItems, aCyrillicClass, aCharsets)
+{
+}
+
+//---------------------------------------------------------------------
+nsCyrXPCOMStringDetector::~nsCyrXPCOMStringDetector() 
+{
+}
+
+//---------------------------------------------------------------------
+void nsCyrXPCOMStringDetector::Report(const char *aCharset) 
+{
+   mResult = aCharset;
+}
+
+//---------------------------------------------------------------------
+NS_IMETHODIMP nsCyrXPCOMStringDetector::DoIt(const char* aBuf, uint32_t aLen, 
+                     const char** oCharset, nsDetectionConfident &oConf)
+{
+   mResult = nullptr;
+   mDone = false;
+   this->HandleData(aBuf, aLen); 
+   this->DataEnd();
+   *oCharset=mResult;
+   oConf = eBestAnswer;
+   return NS_OK;
+}
+       
+
-- 
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