diff options
Diffstat (limited to 'third_party/zlib/contrib/dotzlib/DotZLib/Deflater.cs')
-rw-r--r-- | third_party/zlib/contrib/dotzlib/DotZLib/Deflater.cs | 212 |
1 files changed, 106 insertions, 106 deletions
diff --git a/third_party/zlib/contrib/dotzlib/DotZLib/Deflater.cs b/third_party/zlib/contrib/dotzlib/DotZLib/Deflater.cs index c2477925b6..9039f41f66 100644 --- a/third_party/zlib/contrib/dotzlib/DotZLib/Deflater.cs +++ b/third_party/zlib/contrib/dotzlib/DotZLib/Deflater.cs @@ -1,106 +1,106 @@ -//
-// © 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 compressor, using the deflate algorithm in the ZLib dll
- /// </summary>
- public sealed class Deflater : CodecBase
- {
- #region Dll imports
- [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
- private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size);
-
- [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
- private static extern int deflate(ref ZStream sz, int flush);
-
- [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
- private static extern int deflateReset(ref ZStream sz);
-
- [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
- private static extern int deflateEnd(ref ZStream sz);
- #endregion
-
- /// <summary>
- /// Constructs an new instance of the <c>Deflater</c>
- /// </summary>
- /// <param name="level">The compression level to use for this <c>Deflater</c></param>
- public Deflater(CompressLevel level) : base()
- {
- int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream));
- if (retval != 0)
- throw new ZLibException(retval, "Could not initialize deflater");
-
- 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));
- while (err >= 0 && _ztream.avail_in > 0)
- {
- err = deflate(ref _ztream, (int)FlushTypes.None);
- if (err == 0)
- while (_ztream.avail_out == 0)
- {
- OnDataAvailable();
- err = deflate(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 = deflate(ref _ztream, (int)FlushTypes.Finish);
- OnDataAvailable();
- }
- while (err == 0);
- setChecksum( _ztream.adler );
- deflateReset(ref _ztream);
- resetOutput();
- }
-
- /// <summary>
- /// Closes the internal zlib deflate stream
- /// </summary>
- protected override void CleanUp() { deflateEnd(ref _ztream); }
-
- }
-}
+// +// © 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 compressor, using the deflate algorithm in the ZLib dll + /// </summary> + public sealed class Deflater : CodecBase + { + #region Dll imports + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)] + private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int deflate(ref ZStream sz, int flush); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int deflateReset(ref ZStream sz); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int deflateEnd(ref ZStream sz); + #endregion + + /// <summary> + /// Constructs an new instance of the <c>Deflater</c> + /// </summary> + /// <param name="level">The compression level to use for this <c>Deflater</c></param> + public Deflater(CompressLevel level) : base() + { + int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream)); + if (retval != 0) + throw new ZLibException(retval, "Could not initialize deflater"); + + 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)); + while (err >= 0 && _ztream.avail_in > 0) + { + err = deflate(ref _ztream, (int)FlushTypes.None); + if (err == 0) + while (_ztream.avail_out == 0) + { + OnDataAvailable(); + err = deflate(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 = deflate(ref _ztream, (int)FlushTypes.Finish); + OnDataAvailable(); + } + while (err == 0); + setChecksum( _ztream.adler ); + deflateReset(ref _ztream); + resetOutput(); + } + + /// <summary> + /// Closes the internal zlib deflate stream + /// </summary> + protected override void CleanUp() { deflateEnd(ref _ztream); } + + } +} |