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Standard Windows Implementation with Zifmia Wrapper
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This is the standard working version of FyreVM with the Zifmia wrapper.
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ChicagoDave committed Sep 6, 2014
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161 changes: 161 additions & 0 deletions BigEndian.cs
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/*
* Copyright © 2008, Textfyre, Inc. - All Rights Reserved
* Please read the accompanying COPYRIGHT file for licensing resstrictions.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace FyreVM
{
/// <summary>
/// Provides utility functions for working with big-endian numbers.
/// </summary>
internal static class BigEndian
{
/// <summary>
/// Reads an unsigned, big-endian, 16-bit number from a byte array.
/// </summary>
/// <param name="array">The array to read from.</param>
/// <param name="offset">The index within the array where the number starts.</param>
/// <returns>The number read.</returns>
public static ushort ReadInt16(byte[] array, uint offset)
{
return (ushort)((array[offset] << 8) + array[offset + 1]);
}

/// <summary>
/// Reads an unsigned, big-endian, 16-bit number from a byte array.
/// </summary>
/// <param name="array">The array to read from.</param>
/// <param name="offset">The index within the array where the number starts.</param>
/// <returns>The number read.</returns>
public static ushort ReadInt16(byte[] array, int offset)
{
return ReadInt16(array, (uint)offset);
}

/// <summary>
/// Reads an unsigned, big-endian, 32-bit number from a byte array.
/// </summary>
/// <param name="array">The array to read from.</param>
/// <param name="offset">The index within the array where the number starts.</param>
/// <returns>The number read.</returns>
public static uint ReadInt32(byte[] array, uint offset)
{
return (uint)((array[offset] << 24) + (array[offset + 1] << 16) +
(array[offset + 2] << 8) + array[offset + 3]);
}

/// <summary>
/// Reads an unsigned, big-endian, 32-bit number from a byte array.
/// </summary>
/// <param name="array">The array to read from.</param>
/// <param name="offset">The index within the array where the number starts.</param>
/// <returns>The number read.</returns>
public static uint ReadInt32(byte[] array, int offset)
{
return ReadInt32(array, (uint)offset);
}

/// <summary>
/// Writes an unsigned, big-endian, 16-bit number into a byte array.
/// </summary>
/// <param name="array">The array to write into.</param>
/// <param name="offset">The index within the array where the number will start.</param>
/// <param name="value">The number to write.</param>
public static void WriteInt16(byte[] array, uint offset, ushort value)
{
array[offset] = (byte)(value >> 8);
array[offset + 1] = (byte)value;
}

/// <summary>
/// Writes an unsigned, big-endian, 16-bit number into a byte array.
/// </summary>
/// <param name="array">The array to write into.</param>
/// <param name="offset">The index within the array where the number will start.</param>
/// <param name="value">The number to write.</param>
public static void WriteInt16(byte[] array, int offset, ushort value)
{
WriteInt16(array, (uint)offset, value);
}

/// <summary>
/// Writes an unsigned, big-endian, 32-bit number into a byte array.
/// </summary>
/// <param name="array">The array to write into.</param>
/// <param name="offset">The index within the array where the number will start.</param>
/// <param name="value">The number to write.</param>
public static void WriteInt32(byte[] array, uint offset, uint value)
{
array[offset] = (byte)(value >> 24);
array[offset + 1] = (byte)(value >> 16);
array[offset + 2] = (byte)(value >> 8);
array[offset + 3] = (byte)value;
}

/// <summary>
/// Writes an unsigned, big-endian, 32-bit number into a byte array.
/// </summary>
/// <param name="array">The array to write into.</param>
/// <param name="offset">The index within the array where the number will start.</param>
/// <param name="value">The number to write.</param>
public static void WriteInt32(byte[] array, int offset, uint value)
{
WriteInt32(array, (uint)offset, value);
}

/// <summary>
/// Writes an unsigned, big-endian, 16-bit number to a stream.
/// </summary>
/// <param name="stream">The stream to write to.</param>
/// <param name="value">The number to write.</param>
public static void WriteInt16(Stream stream, ushort value)
{
stream.WriteByte((byte)(value >> 8));
stream.WriteByte((byte)value);
}

/// <summary>
/// Reads an unsigned, big-endian, 16-bit number from a stream.
/// </summary>
/// <param name="stream">The stream to read from.</param>
/// <returns>The number read.</returns>
public static ushort ReadInt16(Stream stream)
{
int a = stream.ReadByte();
int b = stream.ReadByte();
return (ushort)((a << 8) + b);
}

/// <summary>
/// Writes an unsigned, big-endian, 32-bit number to a stream.
/// </summary>
/// <param name="stream">The stream to write to.</param>
/// <param name="value">The number to write.</param>
public static void WriteInt32(Stream stream, uint value)
{
stream.WriteByte((byte)(value >> 24));
stream.WriteByte((byte)(value >> 16));
stream.WriteByte((byte)(value >> 8));
stream.WriteByte((byte)value);
}

/// <summary>
/// Reads an unsigned, big-endian, 32-bit number from a stream.
/// </summary>
/// <param name="stream">The stream to read from.</param>
/// <returns>The number read.</returns>
public static uint ReadInt32(Stream stream)
{
int a = stream.ReadByte();
int b = stream.ReadByte();
int c = stream.ReadByte();
int d = stream.ReadByte();
return (uint)((a << 24) + (b << 16) + (c << 8) + d);
}
}
}
21 changes: 21 additions & 0 deletions COPYRIGHT
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The MIT License

Copyright (c) 2014 Textfyre, Inc.

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.
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