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Viewing changes to contrib/NGit/NGit.Util/RawCharSequence.cs

  • Committer: Bazaar Package Importer
  • Author(s): Jo Shields
  • Date: 2011-06-27 17:03:13 UTC
  • mto: (1.8.1 upstream)
  • mto: This revision was merged to the branch mainline in revision 54.
  • Revision ID: james.westby@ubuntu.com-20110627170313-6cvz3s19x6e9hqe9
Import upstream version 2.5.92+dfsg

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contrib/NGit/NGit.Util/RawCharSequence.cs
 
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/*
 
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This code is derived from jgit (http://eclipse.org/jgit).
 
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Copyright owners are documented in jgit's IP log.
 
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This program and the accompanying materials are made available
 
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under the terms of the Eclipse Distribution License v1.0 which
 
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accompanies this distribution, is reproduced below, and is
 
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available at http://www.eclipse.org/org/documents/edl-v10.php
 
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All rights reserved.
 
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Redistribution and use in source and binary forms, with or
 
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without modification, are permitted provided that the following
 
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conditions are met:
 
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- Redistributions of source code must retain the above copyright
 
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  notice, this list of conditions and the following disclaimer.
 
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- Redistributions in binary form must reproduce the above
 
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  copyright notice, this list of conditions and the following
 
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  disclaimer in the documentation and/or other materials provided
 
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  with the distribution.
 
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- Neither the name of the Eclipse Foundation, Inc. nor the
 
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  names of its contributors may be used to endorse or promote
 
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  products derived from this software without specific prior
 
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  written permission.
 
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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*/
 
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using System.Text;
 
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using Sharpen;
 
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namespace NGit.Util
 
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{
 
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        /// <summary>A rough character sequence around a raw byte buffer.</summary>
 
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        /// <remarks>
 
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        /// A rough character sequence around a raw byte buffer.
 
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        /// <p>
 
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        /// Characters are assumed to be 8-bit US-ASCII.
 
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        /// </remarks>
 
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        public sealed class RawCharSequence : CharSequence
 
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        {
 
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                /// <summary>A zero-length character sequence.</summary>
 
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                /// <remarks>A zero-length character sequence.</remarks>
 
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                public static readonly NGit.Util.RawCharSequence EMPTY = new NGit.Util.RawCharSequence
 
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                        (null, 0, 0);
 
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                internal readonly byte[] buffer;
 
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                internal readonly int startPtr;
 
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                internal readonly int endPtr;
 
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                /// <summary>Create a rough character sequence around the raw byte buffer.</summary>
 
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                /// <remarks>Create a rough character sequence around the raw byte buffer.</remarks>
 
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                /// <param name="buf">buffer to scan.</param>
 
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                /// <param name="start">starting position for the sequence.</param>
 
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                /// <param name="end">ending position for the sequence.</param>
 
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                public RawCharSequence(byte[] buf, int start, int end)
 
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                {
 
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                        buffer = buf;
 
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                        startPtr = start;
 
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                        endPtr = end;
 
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                }
 
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                public char CharAt(int index)
 
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                {
 
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                        return (char)(buffer[startPtr + index] & unchecked((int)(0xff)));
 
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                }
 
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                public int Length
 
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                {
 
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                        get
 
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                        {
 
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                                return endPtr - startPtr;
 
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                        }
 
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                }
 
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                public CharSequence SubSequence(int start, int end)
 
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                {
 
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                        return new NGit.Util.RawCharSequence(buffer, startPtr + start, startPtr + end);
 
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                }
 
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                public override string ToString()
 
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                {
 
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                        int n = Length;
 
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                        StringBuilder b = new StringBuilder(n);
 
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                        for (int i = 0; i < n; i++)
 
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                        {
 
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                                b.Append(CharAt (i));
 
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                        }
 
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                        return b.ToString();
 
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                }
 
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        }
 
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}