/// <summary>
/// Asynchronously writes a raw block of data to a file, combining <paramref name="basePath"/> with block's <see cref="DirectoryEntryBlock.FilePath"/>. Directories will be created as necessary.
/// </summary>
/// <param name="basePath"></param>
/// <param name="rawBlock"></param>
/// <param name="block"></param>
public static async Task WriteRawBlockAsync(
string basePath,
byte[] rawBlock,
DirectoryEntryBlock block,
CancellationToken cancellationToken = default)
{
string path = Path.Combine(basePath, block.FilePath);
Directory.CreateDirectory(Path.GetDirectoryName(path) !);
using var fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read, (int)block.TotalUncompressedSize, true);
await fs.WriteAsync(rawBlock, cancellationToken);
}
/// <summary>
/// Asynchronously reads a raw block from the stream into the given buffer.
/// </summary>
/// <param name="archiveStreams"></param>
/// <param name="buffer"></param>
/// <param name="block"></param>
/// <returns></returns>
public static async Task ReadRawBlockAsync(
Stream archiveStream,
Memory <byte> buffer,
DirectoryEntryBlock block,
IProgress <EntryOperation>?progress = null,
CancellationToken cancellationToken = default)
{
int offset = 0;
foreach (var entry in block.Entries)
{
cancellationToken.ThrowIfCancellationRequested();
var entrySlice = buffer.Slice(offset, (int)entry.UncompressedSize);
await ReadRawEntryAsync(archiveStream, entrySlice, entry.Offset, cancellationToken);
offset += (int)entry.UncompressedSize;
progress?.Report(EntryOperation.Read);
}
}