//
// Copyright (c) 2008-2011, Kenneth Bell
//
// 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.
//

using DiscUtils.Streams;

namespace DiscUtils.Iso9660Ps1
{
    internal class BootVolumeDescriptor : BaseVolumeDescriptor
    {
        public const string ElToritoSystemIdentifier = "EL TORITO SPECIFICATION";

        public BootVolumeDescriptor(uint catalogSector, int sectorSize)
            : base(VolumeDescriptorType.Boot, 1, sectorSize)
        {
            CatalogSector = catalogSector;
        }

        public BootVolumeDescriptor(byte[] src, int offset)
            : base(src, offset)
        {
            SystemId = EndianUtilities.BytesToString(src, offset + 0x7, 0x20).TrimEnd('\0');
            CatalogSector = EndianUtilities.ToUInt32LittleEndian(src, offset + 0x47);
        }

        public uint CatalogSector { get; }

        public string SystemId { get; }

        internal override void WriteTo(byte[] buffer, int offset)
        {
            base.WriteTo(buffer, offset);

            EndianUtilities.StringToBytes(ElToritoSystemIdentifier, buffer, offset + 7, 0x20);
            EndianUtilities.WriteBytesLittleEndian(CatalogSector, buffer, offset + 0x47);
        }
    }
}