/* | |
* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
* | |
*/ | |
using System; | |
namespace org.apache.qpid.transport.util | |
{ | |
public static class ByteEncoder | |
{ | |
#region Endian conversion helper routines | |
/// <summary> | |
/// Returns the value encoded in Big Endian (PPC, XDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Big-endian encoded value.</returns> | |
public static Int32 GetBigEndian(Int32 value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return swapByteOrder(value); | |
} | |
return value; | |
} | |
/// <summary> | |
/// Returns the value encoded in Big Endian (PPC, XDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Big-endian encoded value.</returns> | |
public static UInt16 GetBigEndian(UInt16 value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return swapByteOrder(value); | |
} | |
return value; | |
} | |
/// <summary> | |
/// Returns the value encoded in Big Endian (PPC, XDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Big-endian encoded value.</returns> | |
public static UInt32 GetBigEndian(UInt32 value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return swapByteOrder(value); | |
} | |
return value; | |
} | |
/// <summary> | |
/// Returns the value encoded in Big Endian (PPC, XDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Big-endian encoded value.</returns> | |
public static long GetBigEndian(long value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return swapByteOrder(value); | |
} | |
return value; | |
} | |
/// <summary> | |
/// Returns the value encoded in Little Endian (x86, NDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Little-endian encoded value.</returns> | |
public static Int32 GetLittleEndian(Int32 value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return value; | |
} | |
return swapByteOrder(value); | |
} | |
/// <summary> | |
/// Returns the value encoded in Little Endian (x86, NDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Little-endian encoded value.</returns> | |
public static UInt32 GetLittleEndian(UInt32 value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return value; | |
} | |
return swapByteOrder(value); | |
} | |
/// <summary> | |
/// Returns the value encoded in Little Endian (x86, NDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Little-endian encoded value.</returns> | |
public static UInt16 GetLittleEndian(UInt16 value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return value; | |
} | |
return swapByteOrder(value); | |
} | |
/// <summary> | |
/// Returns the value encoded in Little Endian (x86, NDR) format. | |
/// </summary> | |
/// <param name="value">Value to encode.</param> | |
/// <returns>Little-endian encoded value.</returns> | |
public static long GetLittleEndian(long value) | |
{ | |
if (BitConverter.IsLittleEndian) | |
{ | |
return value; | |
} | |
return swapByteOrder(value); | |
} | |
/// <summary> | |
/// Swaps the Byte order of an <see cref="Int32"/>. | |
/// </summary> | |
/// <param name="value"><see cref="Int32"/> to swap the bytes of.</param> | |
/// <returns>Byte order swapped <see cref="Int32"/>.</returns> | |
private static Int32 swapByteOrder(Int32 value) | |
{ | |
Int32 swapped = (Int32)((0x000000FF) & (value >> 24) | |
| (0x0000FF00) & (value >> 8) | |
| (0x00FF0000) & (value << 8) | |
| (0xFF000000) & (value << 24)); | |
return swapped; | |
} | |
/// <summary> | |
/// Swaps the byte order of a <see cref="UInt16"/>. | |
/// </summary> | |
/// <param name="value"><see cref="UInt16"/> to swap the bytes of.</param> | |
/// <returns>Byte order swapped <see cref="UInt16"/>.</returns> | |
private static UInt16 swapByteOrder(UInt16 value) | |
{ | |
return (UInt16)((0x00FF & (value >> 8)) | |
| (0xFF00 & (value << 8))); | |
} | |
/// <summary> | |
/// Swaps the byte order of a <see cref="UInt32"/>. | |
/// </summary> | |
/// <param name="value"><see cref="UInt32"/> to swap the bytes of.</param> | |
/// <returns>Byte order swapped <see cref="UInt32"/>.</returns> | |
private static UInt32 swapByteOrder(UInt32 value) | |
{ | |
UInt32 swapped = ((0x000000FF) & (value >> 24) | |
| (0x0000FF00) & (value >> 8) | |
| (0x00FF0000) & (value << 8) | |
| (0xFF000000) & (value << 24)); | |
return swapped; | |
} | |
/// <summary> | |
/// Swaps the byte order of a <see cref="Double"/> (double precision IEEE 754) | |
/// </summary> | |
/// <param name="value"><see cref="Double"/> to swap.</param> | |
/// <returns>Byte order swapped <see cref="Double"/> value.</returns> | |
private static long swapByteOrder(long value) | |
{ | |
Byte[] buffer = BitConverter.GetBytes(value); | |
Array.Reverse(buffer, 0, buffer.Length); | |
return BitConverter.ToInt64(buffer, 0); | |
} | |
#endregion | |
} | |
} |