1 files changed, 125 insertions, 0 deletions
diff --git a/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsCharSetProber.cpp b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsCharSetProber.cpp
new file mode 100644
index 0000000..0429dd1
--- /dev/null
+++ b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsCharSetProber.cpp
@@ -0,0 +1,125 @@
+/* -*- 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 Universal charset detector code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *          Shy Shalom <shooshX@gmail.com>
+ *
+ * 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 "nsCharSetProber.h"
+#include "prmem.h"
+
+//This filter applies to all scripts which do not use English characters
+PRBool nsCharSetProber::FilterWithoutEnglishLetters(const char* aBuf, PRUint32 aLen, char** newBuf, PRUint32& newLen)
+{
+  char *newptr;
+  char *prevPtr, *curPtr;
+  
+  PRBool meetMSB = PR_FALSE;   
+  newptr = *newBuf = (char*)PR_Malloc(aLen);
+  if (!newptr)
+    return PR_FALSE;
+
+  for (curPtr = prevPtr = (char*)aBuf; curPtr < aBuf+aLen; curPtr++)
+  {
+    if (*curPtr & 0x80)
+    {
+      meetMSB = PR_TRUE;
+    }
+    else if (*curPtr < 'A' || (*curPtr > 'Z' && *curPtr < 'a') || *curPtr > 'z') 
+    {
+      //current char is a symbol, most likely a punctuation. we treat it as segment delimiter
+      if (meetMSB && curPtr > prevPtr) 
+      //this segment contains more than single symbol, and it has upper ASCII, we need to keep it
+      {
+        while (prevPtr < curPtr) *newptr++ = *prevPtr++;  
+        prevPtr++;
+        *newptr++ = ' ';
+        meetMSB = PR_FALSE;
+      }
+      else //ignore current segment. (either because it is just a symbol or just an English word)
+        prevPtr = curPtr+1;
+    }
+  }
+  if (meetMSB && curPtr > prevPtr) 
+    while (prevPtr < curPtr) *newptr++ = *prevPtr++;  
+
+  newLen = newptr - *newBuf;
+
+  return PR_TRUE;
+}
+
+//This filter applies to all scripts which contain both English characters and upper ASCII characters.
+PRBool nsCharSetProber::FilterWithEnglishLetters(const char* aBuf, PRUint32 aLen, char** newBuf, PRUint32& newLen)
+{
+  //do filtering to reduce load to probers
+  char *newptr;
+  char *prevPtr, *curPtr;
+  PRBool isInTag = PR_FALSE;
+
+  newptr = *newBuf = (char*)PR_Malloc(aLen);
+  if (!newptr)
+    return PR_FALSE;
+
+  for (curPtr = prevPtr = (char*)aBuf; curPtr < aBuf+aLen; curPtr++)
+  {
+    if (*curPtr == '>')
+      isInTag = PR_FALSE;
+    else if (*curPtr == '<')
+      isInTag = PR_TRUE;
+
+    if (!(*curPtr & 0x80) &&
+        (*curPtr < 'A' || (*curPtr > 'Z' && *curPtr < 'a') || *curPtr > 'z') )
+    {
+      if (curPtr > prevPtr && !isInTag) // Current segment contains more than just a symbol 
+                                        // and it is not inside a tag, keep it.
+      {
+        while (prevPtr < curPtr) *newptr++ = *prevPtr++;  
+        prevPtr++;
+        *newptr++ = ' ';
+      }
+      else
+        prevPtr = curPtr+1;
+    }
+  }
+
+  // If the current segment contains more than just a symbol 
+  // and it is not inside a tag then keep it.
+  if (!isInTag)
+    while (prevPtr < curPtr)
+      *newptr++ = *prevPtr++;  
+
+  newLen = newptr - *newBuf;
+
+  return PR_TRUE;
+}