/// <summary>
/// Initializes a new instance of the <see cref="XZInputStream"/> class.
/// </summary>
/// <param name="stream">
/// The underlying <see cref="Stream"/> from which to decompress the data.
/// </param>
/// <param name="format">
/// The lzma formats which are supported.
/// </param>
/// <param name="ownership">
/// Determines whether the underlying stream should be disposed of, or not.
/// </param>
public XZInputStream(Stream stream, LzmaFormat format = LzmaFormat.Auto, Ownership ownership = Ownership.None)
{
this.innerStream = stream ?? throw new ArgumentNullException(nameof(stream));
this.ownership = ownership;
LzmaResult ret;
switch (format)
{
case LzmaFormat.Lzma:
ret = NativeMethods.lzma_alone_decoder(ref this.lzmaStream, ulong.MaxValue);
break;
case LzmaFormat.Xz:
ret = NativeMethods.lzma_stream_decoder(ref this.lzmaStream, ulong.MaxValue, LzmaDecodeFlags.Concatenated);
break;
default:
case LzmaFormat.Auto:
ret = NativeMethods.lzma_auto_decoder(ref this.lzmaStream, ulong.MaxValue, LzmaDecodeFlags.Concatenated);
break;
}
this.inbuf = Marshal.AllocHGlobal(BufSize);
this.outbuf = Marshal.AllocHGlobal(BufSize);
this.lzmaStream.AvailIn = 0;
this.lzmaStream.NextIn = (byte *)this.inbuf;
this.lzmaStream.NextOut = (byte *)this.outbuf;
this.lzmaStream.AvailOut = BufSize;
LzmaException.ThrowOnError(ret);
}
public void Read_InvalidFormat_ReturnsError(string path, LzmaFormat format)
{
byte[] data = File.ReadAllBytes(path);
byte[] output = new byte[100];
using (XZDecompressor decompressor = new XZDecompressor(format))
{
Assert.Equal(OperationStatus.InvalidData, decompressor.Decompress(data, output, out int bytesConsumed, out int bytesWritten));
}
}
public void Read_InvalidFormat_Throws(string path, LzmaFormat format)
{
using (Stream stream = File.OpenRead(path))
using (XZInputStream xzStream = new XZInputStream(stream, format))
{
byte[] buffer = new byte[128];
Assert.Throws <LzmaException>(() => xzStream.Read(buffer, 0, 128));
xzStream.Dispose();
Assert.Throws <ObjectDisposedException>(() => xzStream.Read(buffer, 0, 128));
}
}
public void Read_WithFormat_Works(string path, LzmaFormat format)
{
using (Stream stream = File.OpenRead(path))
using (XZInputStream xzStream = new XZInputStream(stream, format))
{
byte[] buffer = new byte[128];
Assert.Equal(14, xzStream.Read(buffer, 0, 128));
Assert.Equal(0, xzStream.Read(buffer, 0, 128));
Assert.Equal("Hello, World!\n", Encoding.UTF8.GetString(buffer, 0, 14));
xzStream.Dispose();
Assert.Throws <ObjectDisposedException>(() => xzStream.Read(buffer, 0, 128));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="XZDecompressor" /> class.
/// </summary>
/// <param name="format">
/// The format of the data to decompress.
/// </param>
public XZDecompressor(LzmaFormat format = LzmaFormat.Auto)
{
LzmaResult ret;
switch (format)
{
case LzmaFormat.Lzma:
ret = NativeMethods.lzma_alone_decoder(ref this.lzmaStream, ulong.MaxValue);
break;
case LzmaFormat.Xz:
ret = NativeMethods.lzma_stream_decoder(ref this.lzmaStream, ulong.MaxValue, LzmaDecodeFlags.Concatenated);
break;
default:
case LzmaFormat.Auto:
ret = NativeMethods.lzma_auto_decoder(ref this.lzmaStream, ulong.MaxValue, LzmaDecodeFlags.Concatenated);
break;
}
LzmaException.ThrowOnError(ret);
}