src/Noddybox.Emulation.EightBit/Binary.cs


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using System;

namespace Noddybox.Emulation.EightBit
{
    /// <summary>
    /// Provides helpers for shifting smaller values around without casts all over the shop.
    /// </summary>
    public static class Binary
    {
        /// <summary>
        /// Shift 8-bits to the left.
        /// </summary>
        /// <param name="b">The byte.</param>
        /// <param name="shift">How many bits to shift.</param>
        /// <returns>The shifted value.</returns>
        public static byte ShiftLeft(byte b, int shift)
        {
            return (byte)((b << shift) & 0xff);
        }

        /// <summary>
        /// Shift 8-bits to the right.
        /// </summary>
        /// <param name="b">The byte.</param>
        /// <param name="shift">How many bits to shift.</param>
        /// <returns>The shifted value.</returns>
        public static byte ShiftRight(byte b, int shift)
        {
            return (byte)((b >> shift) & 0xff);
        }

        /// <summary>
        /// Shift 16-bits to the left.
        /// </summary>
        /// <param name="w">The word.</param>
        /// <param name="shift">How many bits to shift.</param>
        /// <returns>The shifted value.</returns>
        public static ushort ShiftLeft(ushort w, int shift)
        {
            return (ushort)((w << shift) & 0xffff);
        }

        /// <summary>
        /// Shift 16-bits to the right.
        /// </summary>
        /// <param name="w">The word.</param>
        /// <param name="shift">How many bits to shift.</param>
        /// <returns>The shifted value.</returns>
        public static ushort ShiftRight(ushort w, int shift)
        {
            return (ushort)((w >> shift) & 0xffff);
        }
    }
}