public override void Write(Stream output, IDirectory inputDirectory)
{
BinaryWriter writer = new BinaryWriter(output, Encoding.Default, true);
foreach (var gzsEntry in Entries)
{
// TODO: Write the key magic number, the key and increase the entry size by 8 bytes.
gzsEntry.WriteData(output, inputDirectory);
output.AlignWrite(16, 0x00);
}
var entryBlockOffset = (int)(output.Position / 16);
foreach (var gzsEntry in Entries)
{
gzsEntry.CalculateHash();
gzsEntry.Write(output);
}
uint sizeSum = (uint)Entries.Sum(e => e.Size);
writer.Write(sizeSum);
output.AlignWrite(16, 0x00);
GzsArchiveFooter footer = new GzsArchiveFooter
{
ArchiveEntryCount = Entries.Count,
EntryBlockOffset = entryBlockOffset
};
footer.Write(output);
}
public static GzsArchiveFooter ReadGzArchiveFooter(Stream input)
{
GzsArchiveFooter gzsArchiveFooter = new GzsArchiveFooter();
gzsArchiveFooter.Read(input);
return(gzsArchiveFooter);
}
public override void Read(Stream input)
{
BinaryReader reader = new BinaryReader(input, Encoding.Default, true);
input.Seek(-4, SeekOrigin.End);
int footerSize = reader.ReadInt32();
input.Seek(-20, SeekOrigin.Current);
if (footerSize != 20)
{
throw new Exception("Invalid gzs footer.");
}
GzsArchiveFooter footer = GzsArchiveFooter.ReadGzArchiveFooter(input);
input.Seek(16 * footer.EntryBlockOffset, SeekOrigin.Begin);
for (int i = 0; i < footer.ArchiveEntryCount; i++)
{
Entries.Add(GzsEntry.ReadGzsEntry(input));
}
}