Latin1Encoding.cs :  » 2.6.4-mono-.net-core » System.Text » System » Text » C# / CSharp Open Source

Home
C# / CSharp Open Source
1.2.6.4 mono .net core
2.2.6.4 mono core
3.Aspect Oriented Frameworks
4.Bloggers
5.Build Systems
6.Business Application
7.Charting Reporting Tools
8.Chat Servers
9.Code Coverage Tools
10.Content Management Systems CMS
11.CRM ERP
12.Database
13.Development
14.Email
15.Forum
16.Game
17.GIS
18.GUI
19.IDEs
20.Installers Generators
21.Inversion of Control Dependency Injection
22.Issue Tracking
23.Logging Tools
24.Message
25.Mobile
26.Network Clients
27.Network Servers
28.Office
29.PDF
30.Persistence Frameworks
31.Portals
32.Profilers
33.Project Management
34.RSS RDF
35.Rule Engines
36.Script
37.Search Engines
38.Sound Audio
39.Source Control
40.SQL Clients
41.Template Engines
42.Testing
43.UML
44.Web Frameworks
45.Web Service
46.Web Testing
47.Wiki Engines
48.Windows Presentation Foundation
49.Workflows
50.XML Parsers
C# / C Sharp
C# / C Sharp by API
C# / CSharp Tutorial
C# / CSharp Open Source » 2.6.4 mono .net core » System.Text 
System.Text » System » Text » Latin1Encoding.cs
/*
 * Latin1Encoding.cs - Implementation of the
 *      "System.Text.Latin1Encoding" class.
 *
 * Copyright (c) 2002  Southern Storm Software, Pty Ltd
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

namespace System.Text{

using System;

[Serializable]
internal class Latin1Encoding : Encoding
{
  // Magic number used by Windows for the ISO Latin1 code page.
  internal const int ISOLATIN_CODE_PAGE = 28591;

  // Constructor.
  public Latin1Encoding () : base (ISOLATIN_CODE_PAGE)
  {
    // Nothing to do here.
  }

  public override bool IsSingleByte {
    get { return true; }
  }

  public override bool IsAlwaysNormalized (NormalizationForm form)
  {
    return form == NormalizationForm.FormC;
  }

  // Get the number of bytes needed to encode a character buffer.
  public override int GetByteCount (char[] chars, int index, int count)
  {
    if (chars == null) {
      throw new ArgumentNullException ("chars");
    }
    if (index < 0 || index > chars.Length) {
      throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
    }
    if (count < 0 || count > (chars.Length - index)) {
      throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
    }
    return count;
  }

  // Convenience wrappers for "GetByteCount".
  public override int GetByteCount (String s)
  {
    if (s == null) {
      throw new ArgumentNullException ("s");
    }
    return s.Length;
  }

  // Get the bytes that result from encoding a character buffer.
  public override int GetBytes (char[] chars, int charIndex, int charCount,
                 byte[] bytes, int byteIndex)
  {
    EncoderFallbackBuffer buffer = null;
    char [] fallback_chars = null;
    return GetBytes (chars, charIndex, charCount, bytes,
      byteIndex, ref buffer, ref fallback_chars);
  }

  int GetBytes (char[] chars, int charIndex, int charCount,
          byte[] bytes, int byteIndex,
          ref EncoderFallbackBuffer buffer,
          ref char [] fallback_chars)
  {
    if (chars == null)
      throw new ArgumentNullException ("chars");

    unsafe {
      fixed (char *cptr = chars) {
        return InternalGetBytes (cptr, chars.Length, charIndex, charCount, bytes, byteIndex, ref buffer, ref fallback_chars);
      }
    }
  }

  // Convenience wrappers for "GetBytes".
  public override int GetBytes (String s, int charIndex, int charCount,
                 byte[] bytes, int byteIndex)
  {
    EncoderFallbackBuffer buffer = null;
    char [] fallback_chars = null;
    return GetBytes (s, charIndex, charCount, bytes, byteIndex,
      ref buffer, ref fallback_chars);
  }

  int GetBytes (String s, int charIndex, int charCount,
          byte[] bytes, int byteIndex,
          ref EncoderFallbackBuffer buffer,
          ref char [] fallback_chars)
  {
    if (s == null)
      throw new ArgumentNullException ("s");

    unsafe {
      fixed (char *chars = s) {
        return InternalGetBytes (chars, s.Length, charIndex, charCount, bytes, byteIndex, ref buffer, ref fallback_chars);
      }
    }
  }

  unsafe int InternalGetBytes (char *chars, int charLength, int charIndex, int charCount,
          byte[] bytes, int byteIndex,
          ref EncoderFallbackBuffer buffer,
          ref char [] fallback_chars)
  {
    if (bytes == null)
      throw new ArgumentNullException ("bytes");
    if (charIndex < 0 || charIndex > charLength)
      throw new ArgumentOutOfRangeException ("charIndex", _("ArgRange_Array"));
    if (charCount < 0 || charCount > (charLength - charIndex))
      throw new ArgumentOutOfRangeException ("charCount", _("ArgRange_Array"));
    if (byteIndex < 0 || byteIndex > bytes.Length)
      throw new ArgumentOutOfRangeException ("byteIndex", _("ArgRange_Array"));
    if ((bytes.Length - byteIndex) < charCount)
      throw new ArgumentException (_("Arg_InsufficientSpace"));

    int count = charCount;
    char ch;
    while (count-- > 0) {
      ch = chars [charIndex++];
      if (ch < (char)0x0100) {
        bytes [byteIndex++] = (byte)ch;
      } else if (ch >= '\uFF01' && ch <= '\uFF5E') {
        bytes [byteIndex++] = (byte)(ch - 0xFEE0);
      } else {
        if (buffer == null)
          buffer = EncoderFallback.CreateFallbackBuffer ();
        if (Char.IsSurrogate (ch) && count > 1 &&
            Char.IsSurrogate (chars [charIndex]))
          buffer.Fallback (ch, chars [charIndex], charIndex++ - 1);
        else
          buffer.Fallback (ch, charIndex - 1);
        if (fallback_chars == null || fallback_chars.Length < buffer.Remaining)
          fallback_chars = new char [buffer.Remaining];
        for (int i = 0; i < fallback_chars.Length; i++)
          fallback_chars [i] = buffer.GetNextChar ();
        byteIndex += GetBytes (fallback_chars, 0, 
          fallback_chars.Length, bytes, byteIndex,
          ref buffer, ref fallback_chars);
      }
    }
    return charCount;
  }

  // Get the number of characters needed to decode a byte buffer.
  public override int GetCharCount (byte[] bytes, int index, int count)
  {
    if (bytes == null) {
      throw new ArgumentNullException ("bytes");
    }
    if (index < 0 || index > bytes.Length) {
      throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
    }
    if (count < 0 || count > (bytes.Length - index)) {
      throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
    }
    return count;
  }

  // Get the characters that result from decoding a byte buffer.
  public override int GetChars (byte[] bytes, int byteIndex, int byteCount,
                 char[] chars, int charIndex)
  {
    if (bytes == null) {
      throw new ArgumentNullException ("bytes");
    }
    if (chars == null) {
      throw new ArgumentNullException ("chars");
    }
    if (byteIndex < 0 || byteIndex > bytes.Length) {
      throw new ArgumentOutOfRangeException ("byteIndex", _("ArgRange_Array"));
    }
    if (byteCount < 0 || byteCount > (bytes.Length - byteIndex)) {
      throw new ArgumentOutOfRangeException ("byteCount", _("ArgRange_Array"));
    }
    if (charIndex < 0 || charIndex > chars.Length) {
      throw new ArgumentOutOfRangeException ("charIndex", _("ArgRange_Array"));
    }
    if ((chars.Length - charIndex) < byteCount) {
      throw new ArgumentException (_("Arg_InsufficientSpace"));
    }
    int count = byteCount;
    while (count-- > 0) {
      chars [charIndex++] = (char)(bytes [byteIndex++]);
    }
    return byteCount;
  }

  // Get the maximum number of bytes needed to encode a
  // specified number of characters.
  public override int GetMaxByteCount (int charCount)
  {
    if (charCount < 0) {
      throw new ArgumentOutOfRangeException ("charCount", _("ArgRange_NonNegative"));
    }
    return charCount;
  }

  // Get the maximum number of characters needed to decode a
  // specified number of bytes.
  public override int GetMaxCharCount (int byteCount)
  {
    if (byteCount < 0) {
      throw new ArgumentOutOfRangeException ("byteCount", _("ArgRange_NonNegative"));
    }
    return byteCount;
  }

  // Decode a buffer of bytes into a string.
  public override String GetString (byte[] bytes, int index, int count)
  {
    if (bytes == null) {
      throw new ArgumentNullException ("bytes");
    }
    if (index < 0 || index > bytes.Length) {
      throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
    }
    if (count < 0 || count > (bytes.Length - index)) {
      throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
    }
    if (count == 0)
        return String.Empty;
    unsafe {
      fixed (byte* bytePtr = bytes) {
        string s = string.InternalAllocateStr (count);

        fixed (char* charPtr = s) {
          byte* currByte = bytePtr + index;
          byte* lastByte = currByte + count;
          char* currChar = charPtr;

          while (currByte < lastByte)
            currChar++ [0] = (char) currByte++ [0];
        }

        return s;
      }
    }
  }
  public override String GetString (byte[] bytes)
  {
    if (bytes == null) {
      throw new ArgumentNullException ("bytes");
    }

    return GetString (bytes, 0, bytes.Length);
  }

#if !ECMA_COMPAT

  // Get the mail body name for this encoding.
  public override String BodyName
  {
    get {
      return "iso-8859-1";
    }
  }

  // Get the human-readable name for this encoding.
  public override String EncodingName
  {
    get {
      return "Western European (ISO)";
    }
  }

  // Get the mail agent header name for this encoding.
  public override String HeaderName
  {
    get {
      return "iso-8859-1";
    }
  }

  // Determine if this encoding can be displayed in a Web browser.
  public override bool IsBrowserDisplay
  {
    get {
      return true;
    }
  }

  // Determine if this encoding can be saved from a Web browser.
  public override bool IsBrowserSave
  {
    get {
      return true;
    }
  }

  // Determine if this encoding can be displayed in a mail/news agent.
  public override bool IsMailNewsDisplay
  {
    get {
      return true;
    }
  }

  // Determine if this encoding can be saved from a mail/news agent.
  public override bool IsMailNewsSave
  {
    get {
      return true;
    }
  }

  // Get the IANA-preferred Web name for this encoding.
  public override String WebName
  {
    get {
      return "iso-8859-1";
    }
  }

#endif // !ECMA_COMPAT

}; // class Latin1Encoding

}; // namespace System.Text
www.java2v.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.