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Viewing changes to external/nrefactory/ICSharpCode.NRefactory/Utils/7BitEncodedInts.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/nrefactory/ICSharpCode.NRefactory/Utils/7BitEncodedInts.cs
 
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// Copyright (c) 2011 Daniel Grunwald
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
 
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// software and associated documentation files (the "Software"), to deal in the Software
 
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// without restriction, including without limitation the rights to use, copy, modify, merge,
 
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
 
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// to whom the Software is furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in all copies or
 
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// substantial portions of the Software.
 
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// 
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
 
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 
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// DEALINGS IN THE SOFTWARE.
 
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using System;
 
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using System.IO;
 
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namespace ICSharpCode.NRefactory.Utils
 
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{
 
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        /// <summary>
 
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        /// A binary reader that can read the output of BinaryWriterWith7BitEncodedInts.
 
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        /// </summary>
 
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        public sealed class BinaryReaderWith7BitEncodedInts : BinaryReader
 
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        {
 
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                public BinaryReaderWith7BitEncodedInts(Stream stream) : base(stream)
 
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                {
 
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                }
 
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                public override short ReadInt16()
 
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                {
 
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                        return unchecked((short)(ushort)base.Read7BitEncodedInt());
 
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                }
 
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                [CLSCompliant(false)]
 
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                public override ushort ReadUInt16()
 
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                {
 
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                        return unchecked((ushort)base.Read7BitEncodedInt());
 
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                }
 
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                public override int ReadInt32()
 
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                {
 
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                        return base.Read7BitEncodedInt();
 
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                }
 
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                [CLSCompliant(false)]
 
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                public override uint ReadUInt32()
 
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                {
 
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                        return unchecked((uint)base.Read7BitEncodedInt());
 
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                }
 
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                public override long ReadInt64()
 
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                {
 
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                        return unchecked((long)this.ReadUInt64());
 
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                }
 
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                [CLSCompliant(false)]
 
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                public override ulong ReadUInt64()
 
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                {
 
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                        ulong num = 0;
 
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                        int shift = 0;
 
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                        while (shift < 64) {
 
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                                byte b = this.ReadByte();
 
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                                num |= (ulong)(b & 127) << shift;
 
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                                shift += 7;
 
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                                if ((b & 128) == 0) {
 
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                                        return num;
 
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                                }
 
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                        }
 
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                        throw new FormatException("Invalid 7-bit int64");
 
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                }
 
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        }
 
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        /// <summary>
 
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        /// A binary writer that encodes all integers as 7-bit-encoded-ints.
 
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        /// </summary>
 
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        public sealed class BinaryWriterWith7BitEncodedInts : BinaryWriter
 
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        {
 
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                public BinaryWriterWith7BitEncodedInts(Stream stream) : base(stream)
 
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                {
 
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                }
 
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                public override void Write(short value)
 
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                {
 
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                        base.Write7BitEncodedInt(unchecked((ushort)value));
 
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                }
 
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                [CLSCompliant(false)]
 
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                public override void Write(ushort value)
 
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                {
 
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                        base.Write7BitEncodedInt(value);
 
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                }
 
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                public override void Write(int value)
 
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                {
 
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                        base.Write7BitEncodedInt(value);
 
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                }
 
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                [CLSCompliant(false)]
 
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                public override void Write(uint value)
 
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                {
 
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                        base.Write7BitEncodedInt(unchecked((int)value));
 
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                }
 
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                public override void Write(long value)
 
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                {
 
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                        this.Write(unchecked((ulong)value));
 
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                }
 
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                [CLSCompliant(false)]
 
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                public override void Write(ulong value)
 
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                {
 
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                        while (value >= 128) {
 
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                                this.Write(unchecked((byte)(value | 128u)));
 
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                                value >>= 7;
 
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                        }
 
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                        this.Write(unchecked((byte)value));
 
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                }
 
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        }
 
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}