/******************************************************
 *     ROMVault2 is written by Gordon J.              *
 *     Contact gordon@romvault.com                    *
 *     Copyright 2014                                 *
 ******************************************************/

using System;
using System.IO;

namespace ROMVault2.Utils
{
    public static class ArrByte
    {
        public static void Write(BinaryWriter bw, byte[] b)
        {
            bw.Write((byte)b.Length);
            bw.Write(b);
        }

        public static byte[] Read(BinaryReader br)
        {
            byte len = br.ReadByte();
            return br.ReadBytes(len);
        }

        public static byte[] Copy(byte[] b)
        {
            if (b == null) return null;
            byte[] retB = new byte[b.Length];
            for (int i = 0; i < b.Length; i++)
                retB[i] = b[i];
            return retB;
        }

        public static bool bCompare(byte[] b1, byte[] b2)
        {
            if (b1 == null || b2 == null) return false;

            if (b1.Length != b2.Length) return false;

            for (int i = 0; i < b1.Length; i++)
                if (b1[i] != b2[i]) return false;

            return true;
        }

        public static int iCompare(byte[] b1, byte[] b2)
        {
            int b1Len = (b1 == null) ? 0 : b1.Length;
            int b2Len = (b2 == null) ? 0 : b2.Length;

            int p = 0;
            for (; ; )
            {
                if (b1Len == p)
                    return (b2Len == p) ? 0 : -1;
                if (b2Len == p)
                    return 1;
                if (b1[p] < b2[p])
                    return -1;
                if (b1[p] > b2[p])
                    return 1;
                p++;
            }
        }

        public static string ToString(byte[] b)
        {
            return b == null ? "" : BitConverter.ToString(b).ToLower().Replace("-", "");
        }
    }
}