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Diffstat (limited to 'Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/CharsetProber.cs')
| -rw-r--r-- | Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/CharsetProber.cs | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/CharsetProber.cs b/Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/CharsetProber.cs deleted file mode 100644 index e61e5848d..000000000 --- a/Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/CharsetProber.cs +++ /dev/null @@ -1,202 +0,0 @@ -/* ***** 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> - * Rudi Pettazzi <rudi.pettazzi@gmail.com> (C# port) - * - * 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 ***** */ - -using System.IO; - -namespace UniversalDetector.Core -{ - public enum ProbingState - { - Detecting = 0, // no sure answer yet, but caller can ask for confidence - FoundIt = 1, // positive answer - NotMe = 2 // negative answer - }; - - public abstract class CharsetProber - { - protected const float SHORTCUT_THRESHOLD = 0.95F; - - protected ProbingState state; - - // ASCII codes - private const byte SPACE = 0x20; - private const byte CAPITAL_A = 0x41; - private const byte CAPITAL_Z = 0x5A; - private const byte SMALL_A = 0x61; - private const byte SMALL_Z = 0x7A; - private const byte LESS_THAN = 0x3C; - private const byte GREATER_THAN = 0x3E; - - /// <summary> - /// Feed data to the prober - /// </summary> - /// <param name="buf">a buffer</param> - /// <param name="offset">offset into buffer</param> - /// <param name="len">number of bytes available into buffer</param> - /// <returns> - /// A <see cref="ProbingState"/> - /// </returns> - public abstract ProbingState HandleData(byte[] buf, int offset, int len); - - /// <summary> - /// Reset prober state - /// </summary> - public abstract void Reset(); - - public abstract string GetCharsetName(); - - public abstract float GetConfidence(); - - public virtual ProbingState GetState() - { - return state; - } - - public virtual void SetOption() - { - - } - - public virtual void DumpStatus() - { - - } - - // - // Helper functions used in the Latin1 and Group probers - // - /// <summary> - /// - /// </summary> - /// <returns>filtered buffer</returns> - protected static byte[] FilterWithoutEnglishLetters(byte[] buf, int offset, int len) - { - byte[] result = null; - - using (var ms = new MemoryStream(buf.Length)) - { - - bool meetMSB = false; - int max = offset + len; - int prev = offset; - int cur = offset; - - while (cur < max) - { - byte b = buf[cur]; - - if ((b & 0x80) != 0) - { - meetMSB = true; - } - else if (b < CAPITAL_A || (b > CAPITAL_Z && b < SMALL_A) - || b > SMALL_Z) - { - if (meetMSB && cur > prev) - { - ms.Write(buf, prev, cur - prev); - ms.WriteByte(SPACE); - meetMSB = false; - } - prev = cur + 1; - } - cur++; - } - - if (meetMSB && cur > prev) - ms.Write(buf, prev, cur - prev); - ms.SetLength(ms.Position); - result = ms.ToArray(); - } - return result; - } - - /// <summary> - /// Do filtering to reduce load to probers (Remove ASCII symbols, - /// collapse spaces). This filter applies to all scripts which contain - /// both English characters and upper ASCII characters. - /// </summary> - /// <returns>a filtered copy of the input buffer</returns> - protected static byte[] FilterWithEnglishLetters(byte[] buf, int offset, int len) - { - byte[] result = null; - - using (var ms = new MemoryStream(buf.Length)) - { - - bool inTag = false; - int max = offset + len; - int prev = offset; - int cur = offset; - - while (cur < max) - { - - byte b = buf[cur]; - - if (b == GREATER_THAN) - inTag = false; - else if (b == LESS_THAN) - inTag = true; - - // it's ascii, but it's not a letter - if ((b & 0x80) == 0 && (b < CAPITAL_A || b > SMALL_Z - || (b > CAPITAL_Z && b < SMALL_A))) - { - if (cur > prev && !inTag) - { - ms.Write(buf, prev, cur - prev); - ms.WriteByte(SPACE); - } - prev = cur + 1; - } - cur++; - } - - // If the current segment contains more than just a symbol - // and it is not inside a tag then keep it. - if (!inTag && cur > prev) - ms.Write(buf, prev, cur - prev); - ms.SetLength(ms.Position); - result = ms.ToArray(); - } - return result; - } - } -} - |