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// Copyright (c) 2011 Daniel Grunwald
//
// 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.
using System;
using System.IO;
namespace ICSharpCode.NRefactory.Utils
{
/// <summary>
/// A binary reader that can read the output of BinaryWriterWith7BitEncodedInts.
/// </summary>
public sealed class BinaryReaderWith7BitEncodedInts : BinaryReader
{
public BinaryReaderWith7BitEncodedInts(Stream stream) : base(stream)
{
}
public override short ReadInt16()
{
return unchecked((short)(ushort)base.Read7BitEncodedInt());
}
[CLSCompliant(false)]
public override ushort ReadUInt16()
{
return unchecked((ushort)base.Read7BitEncodedInt());
}
public override int ReadInt32()
{
return base.Read7BitEncodedInt();
}
[CLSCompliant(false)]
public override uint ReadUInt32()
{
return unchecked((uint)base.Read7BitEncodedInt());
}
public override long ReadInt64()
{
return unchecked((long)this.ReadUInt64());
}
[CLSCompliant(false)]
public override ulong ReadUInt64()
{
ulong num = 0;
int shift = 0;
while (shift < 64) {
byte b = this.ReadByte();
num |= (ulong)(b & 127) << shift;
shift += 7;
if ((b & 128) == 0) {
return num;
}
}
throw new FormatException("Invalid 7-bit int64");
}
}
/// <summary>
/// A binary writer that encodes all integers as 7-bit-encoded-ints.
/// </summary>
public sealed class BinaryWriterWith7BitEncodedInts : BinaryWriter
{
public BinaryWriterWith7BitEncodedInts(Stream stream) : base(stream)
{
}
public override void Write(short value)
{
base.Write7BitEncodedInt(unchecked((ushort)value));
}
[CLSCompliant(false)]
public override void Write(ushort value)
{
base.Write7BitEncodedInt(value);
}
public override void Write(int value)
{
base.Write7BitEncodedInt(value);
}
[CLSCompliant(false)]
public override void Write(uint value)
{
base.Write7BitEncodedInt(unchecked((int)value));
}
public override void Write(long value)
{
this.Write(unchecked((ulong)value));
}
[CLSCompliant(false)]
public override void Write(ulong value)
{
while (value >= 128) {
this.Write(unchecked((byte)(value | 128u)));
value >>= 7;
}
this.Write(unchecked((byte)value));
}
}
}
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