/// <summary>
/// Initializes a new <see cref="AbideTagFile"/>.
/// </summary>
public AbideTagFile()
{
//Setup
header = new Header()
{
ATagTag = "ATag"
};
data = new FixedMemoryMappedStream(new byte[0]);
}
/// <summary>
/// Loads an Abide Halo 2 Tag file from the specified stream.
/// </summary>
/// <param name="inStream">The stream that contains the Abide Halo 2 Tag file.</param>
/// <exception cref="ArgumentNullException"><paramref name="inStream"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="inStream"/> does not support seeking or reading.</exception>
/// <exception cref="AbideTagFileException">File failed to open.</exception>
public void Load(Stream inStream)
{
//Check
if (inStream == null)
{
throw new ArgumentNullException(nameof(inStream));
}
if (!inStream.CanSeek)
{
throw new ArgumentException("Stream does not support seeking.", nameof(inStream));
}
if (!inStream.CanRead)
{
throw new ArgumentException("Stream does not support reading.", nameof(inStream));
}
//Check
if (inStream.Length >= 16)
{
using (BinaryReader reader = new BinaryReader(inStream))
{
//Read
header = reader.Read <Header>();
//Load Data
byte[] buffer = new byte[header.DataLength];
inStream.Read(buffer, 0, buffer.Length);
//Prepare
if (data != null)
{
data.Dispose();
}
data = new FixedMemoryMappedStream(buffer, header.MemoryAddress);
}
}
else
{
throw new AbideTagFileException("Invalid Abide Tag file.");
}
}
/// <summary>
/// Loads an Abide Halo 2 Tag file from the specified Halo 2 Index Entry.
/// </summary>
/// <param name="entry">The Halo 2 Index entry to load the Tag from.</param>
/// <exception cref="ArgumentNullException"><paramref name="entry"/> is null.</exception>
public void LoadEntry(IndexEntry entry)
{
//Check
if (entry == null)
{
throw new ArgumentNullException(nameof(entry));
}
//Setup
header.TagType = entry.Root;
header.MemoryAddress = entry.Offset;
//Read
byte[] buffer = new byte[entry.Size];
entry.TagData.Seek(entry.Offset, SeekOrigin.Begin);
entry.TagData.Read(buffer, 0, buffer.Length);
//Create
if (data != null)
{
data.Dispose();
}
data = new FixedMemoryMappedStream(buffer, entry.Offset);
}
