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| author | Jelmer Vernooij <jelmer@samba.org> | 2008-10-12 18:29:36 +0200 |
|---|---|---|
| committer | Jelmer Vernooij <jelmer@samba.org> | 2008-10-12 18:29:36 +0200 |
| commit | cbe4f1b4fae72a54e610725d3304fefd37aa4495 (patch) | |
| tree | 78d0a044db455c70d7e2ded00ddc0b06651dd339 /lib/zlib/contrib/dotzlib/DotZLib/Inflater.cs | |
| parent | 45b340dd19ebc0a5531844030594c4de596ed80f (diff) | |
| download | samba-cbe4f1b4fae72a54e610725d3304fefd37aa4495.tar.gz samba-cbe4f1b4fae72a54e610725d3304fefd37aa4495.tar.bz2 samba-cbe4f1b4fae72a54e610725d3304fefd37aa4495.zip | |
Move zlib to top-level root.
Diffstat (limited to 'lib/zlib/contrib/dotzlib/DotZLib/Inflater.cs')
| -rw-r--r-- | lib/zlib/contrib/dotzlib/DotZLib/Inflater.cs | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/lib/zlib/contrib/dotzlib/DotZLib/Inflater.cs b/lib/zlib/contrib/dotzlib/DotZLib/Inflater.cs new file mode 100644 index 0000000000..4e60cda078 --- /dev/null +++ b/lib/zlib/contrib/dotzlib/DotZLib/Inflater.cs @@ -0,0 +1,105 @@ +//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+
+ /// <summary>
+ /// Implements a data decompressor, using the inflate algorithm in the ZLib dll
+ /// </summary>
+ public class Inflater : CodecBase
+ {
+ #region Dll imports
+ [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
+ private static extern int inflateInit_(ref ZStream sz, string vs, int size);
+
+ [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+ private static extern int inflate(ref ZStream sz, int flush);
+
+ [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+ private static extern int inflateReset(ref ZStream sz);
+
+ [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+ private static extern int inflateEnd(ref ZStream sz);
+ #endregion
+
+ /// <summary>
+ /// Constructs an new instance of the <c>Inflater</c>
+ /// </summary>
+ public Inflater() : base()
+ {
+ int retval = inflateInit_(ref _ztream, Info.Version, Marshal.SizeOf(_ztream));
+ if (retval != 0)
+ throw new ZLibException(retval, "Could not initialize inflater");
+
+ resetOutput();
+ }
+
+
+ /// <summary>
+ /// Adds more data to the codec to be processed.
+ /// </summary>
+ /// <param name="data">Byte array containing the data to be added to the codec</param>
+ /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+ /// <param name="count">The number of bytes to add</param>
+ /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+ public override void Add(byte[] data, int offset, int count)
+ {
+ if (data == null) throw new ArgumentNullException();
+ if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+ if ((offset+count) > data.Length) throw new ArgumentException();
+
+ int total = count;
+ int inputIndex = offset;
+ int err = 0;
+
+ while (err >= 0 && inputIndex < total)
+ {
+ copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
+ err = inflate(ref _ztream, (int)FlushTypes.None);
+ if (err == 0)
+ while (_ztream.avail_out == 0)
+ {
+ OnDataAvailable();
+ err = inflate(ref _ztream, (int)FlushTypes.None);
+ }
+
+ inputIndex += (int)_ztream.total_in;
+ }
+ setChecksum( _ztream.adler );
+ }
+
+
+ /// <summary>
+ /// Finishes up any pending data that needs to be processed and handled.
+ /// </summary>
+ public override void Finish()
+ {
+ int err;
+ do
+ {
+ err = inflate(ref _ztream, (int)FlushTypes.Finish);
+ OnDataAvailable();
+ }
+ while (err == 0);
+ setChecksum( _ztream.adler );
+ inflateReset(ref _ztream);
+ resetOutput();
+ }
+
+ /// <summary>
+ /// Closes the internal zlib inflate stream
+ /// </summary>
+ protected override void CleanUp() { inflateEnd(ref _ztream); }
+
+
+ }
+}
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