using System;

using Org.BouncyCastle.Crypto.Utilities;

namespace Org.BouncyCastle.Bcpg.Sig
{
    internal static class Utilities
    {
        internal static bool BooleanFromBytes(byte[] bytes)
        {
            if (bytes.Length != 1)
                throw new InvalidOperationException("Byte array has unexpected length. Expected length 1, got " + bytes.Length);

            if (bytes[0] == 0)
                return false;

            if (bytes[0] == 1)
                return true;

            throw new InvalidOperationException("Unexpected byte value for boolean encoding: " + bytes[0]);
        }

        internal static byte[] BooleanToBytes(bool value)
        {
            return new byte[1]{ Convert.ToByte(value) };
        }

        internal static uint TimeFromBytes(byte[] bytes)
        {
            if (bytes.Length != 4)
                throw new InvalidOperationException("Byte array has unexpected length. Expected length 4, got " + bytes.Length);

            return Pack.BE_To_UInt32(bytes);
        }

        internal static byte[] TimeToBytes(uint t)
        {
            return Pack.UInt32_To_BE(t);
        }
    }
}