| public static MakePartFilename ( string path, int part ) : string | ||
| path | string | |
| part | int | |
| Результат | string | |
private void OpenStreams(FileStream mainStream, int numParts)
{
// Open a stream for each file chunk
_streams = new Stream[numParts];
_streams[0] = mainStream;
for (var part = 1; part < numParts; part++)
{
string partPath = Package.MakePartFilename(_path, part);
_streams[part] = File.Open(partPath, FileMode.Open, FileAccess.Read, FileShare.Read);
}
}
private void OpenStreams(FileStream mainStream, int numParts)
{
// Open a stream for each file chunk
streams = new Stream[numParts];
streams[0] = mainStream;
for (int part = 1; part < numParts; part++)
{
var partPath = Package.MakePartFilename(path, part);
streams[part] = new FileStream(partPath, FileMode.Open, FileAccess.Read);
}
}
public PackagedFileInfo WriteFile(FileInfo info)
{
// Assume that all files are written uncompressed (worst-case) when calculating package sizes
var size = info.Size();
if (streams.Last().Position + size > MaxPackageSize)
{
// Start a new package file if the current one is full.
var partPath = Package.MakePartFilename(path, streams.Count);
var nextPart = new FileStream(partPath, FileMode.Create, FileAccess.Write);
streams.Add(nextPart);
}
var stream = streams.Last();
var packaged = new PackagedFileInfo();
packaged.PackageStream = stream;
packaged.Name = info.Name;
packaged.UncompressedSize = size;
packaged.ArchivePart = (UInt32)(streams.Count - 1);
packaged.OffsetInFile = (UInt32)stream.Position;
packaged.Flags = BinUtils.MakeCompressionFlags(Compression, CompressionLevel);
var reader = info.MakeReader();
var uncompressed = reader.ReadBytes((int)reader.BaseStream.Length);
var compressed = BinUtils.Compress(uncompressed, Compression, CompressionLevel);
stream.Write(compressed, 0, compressed.Length);
reader.Dispose();
packaged.SizeOnDisk = (UInt32)(stream.Position - packaged.OffsetInFile);
packaged.Crc = Crc32.Compute(compressed);
var padLength = PaddingLength();
if (stream.Position % padLength > 0)
{
// Pad the file to a multiple of 64 bytes
byte[] pad = new byte[padLength - (stream.Position % padLength)];
for (int i = 0; i < pad.Length; i++)
{
pad[i] = 0xAD;
}
stream.Write(pad, 0, pad.Length);
}
return(packaged);
}
public PackagedFileInfo WriteFile(AbstractFileInfo info)
{
// Assume that all files are written uncompressed (worst-case) when calculating package sizes
uint size = info.Size();
if (_streams.Last().Position + size > MaxPackageSize)
{
// Start a new package file if the current one is full.
string partPath = Package.MakePartFilename(_path, _streams.Count);
var nextPart = File.Open(partPath, FileMode.Create, FileAccess.Write);
_streams.Add(nextPart);
}
Stream stream = _streams.Last();
var packaged = new PackagedFileInfo
{
PackageStream = stream,
Name = info.Name,
UncompressedSize = size,
ArchivePart = (UInt32)(_streams.Count - 1),
OffsetInFile = (UInt32)stream.Position,
Flags = BinUtils.MakeCompressionFlags(Compression, CompressionLevel)
};
Stream packagedStream = info.MakeStream();
byte[] compressed;
try
{
using (var reader = new BinaryReader(packagedStream, Encoding.UTF8, true))
{
byte[] uncompressed = reader.ReadBytes((int)reader.BaseStream.Length);
compressed = BinUtils.Compress(uncompressed, Compression, CompressionLevel);
stream.Write(compressed, 0, compressed.Length);
}
}
finally
{
info.ReleaseStream();
}
packaged.SizeOnDisk = (UInt32)(stream.Position - packaged.OffsetInFile);
packaged.Crc = Crc32.Compute(compressed, 0);
int padLength = PaddingLength();
if (stream.Position % padLength <= 0)
{
return(packaged);
}
if ((_package.Metadata.Flags & PackageFlags.Solid) == 0)
{
// Pad the file to a multiple of 64 bytes
var pad = new byte[padLength - stream.Position % padLength];
for (var i = 0; i < pad.Length; i++)
{
pad[i] = 0xAD;
}
stream.Write(pad, 0, pad.Length);
}
return(packaged);
}