public void Save(Stream output, IList <IArchiveFileInfo> files)
{
using var bw = new BinaryWriterX(output);
// Calculate offsets
var dataAlignment = PkgSupport.DetermineAlignment((files[0] as PkgArchiveFileInfo).Type);
var entryOffset = HeaderSize;
var dataOffset = (entryOffset + files.Count * EntrySize + dataAlignment - 1) & ~(dataAlignment - 1);
// Write files
var entries = new List <PkgEntry>();
var dataPosition = dataOffset;
foreach (var file in files.Cast <PkgArchiveFileInfo>())
{
// Write file data
var alignment = PkgSupport.DetermineAlignment(file.Type);
var alignedDataPosition = (dataPosition + alignment - 1) & ~(alignment - 1);
output.Position = alignedDataPosition;
var writtenSize = file.SaveFileData(output);
// Create entry
entries.Add(new PkgEntry
{
startOffset = alignedDataPosition,
endOffset = (int)(alignedDataPosition + writtenSize),
hash = file.Hash
});
dataPosition = (int)(alignedDataPosition + writtenSize);
}
bw.WriteAlignment(4);
// Write entries
output.Position = entryOffset;
bw.WriteMultiple(entries);
// Write header
output.Position = 0;
bw.WriteType(new PkgHeader {
fileCount = files.Count, tableSize = dataOffset - 4, dataSize = (int)(output.Length - dataOffset)
});
}
public override void SetFileData(Stream fileData)
{
base.SetFileData(fileData);
Type = PkgSupport.DetermineMagic(fileData);
}
public PkgArchiveFileInfo(Stream fileData, string filePath, uint hash) : base(fileData, filePath)
{
Hash = hash;
Type = PkgSupport.DetermineMagic(fileData);
}