dsdecmp/CSharp/DSDecmp/Utils/IOUtils.cs

42 lines
1.4 KiB
C#

using System;
using System.Collections.Generic;
using System.Text;
namespace DSDecmp
{
/// <summary>
/// Class for I/O-related utility methods.
/// </summary>
public static class IOUtils
{
/// <summary>
/// Returns a 4-byte unsigned integer as used on the NDS converted from four bytes
/// at a specified position in a byte array.
/// </summary>
/// <param name="buffer">The source of the data.</param>
/// <param name="offset">The location of the data in the source.</param>
/// <returns>The indicated 4 bytes converted to uint</returns>
public static uint ToNDSu32(byte[] buffer, int offset)
{
return (uint)(buffer[offset]
| (buffer[offset + 1] << 8)
| (buffer[offset + 2] << 16)
| (buffer[offset + 3] << 24));
}
/// <summary>
/// Converts a u32 value into a sequence of bytes that would make ToNDSu32 return
/// the given input value.
/// </summary>
public static byte[] FromNDSu32(uint value)
{
return new byte[] {
(byte)(value & 0xFF),
(byte)((value >> 8) & 0xFF),
(byte)((value >> 16) & 0xFF),
(byte)((value >> 24) & 0xFF)
};
}
}
}