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using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
namespace SharpCompress.Common.Zip.Headers
{
internal abstract class ZipFileEntry : ZipHeader
{
protected ZipFileEntry(ZipHeaderType type)
: base(type)
{
Extra = new List<ExtraData>();
}
internal bool IsDirectory
{
get { return Name.EndsWith("/"); }
}
protected string DecodeString(byte[] str)
{
if (FlagUtility.HasFlag(Flags, HeaderFlags.UTF8))
{
return Encoding.UTF8.GetString(str, 0, str.Length);
}
return ArchiveEncoding.Default.GetString(str, 0, str.Length);
}
protected byte[] EncodeString(string str)
{
if (FlagUtility.HasFlag(Flags, HeaderFlags.UTF8))
{
return Encoding.UTF8.GetBytes(str);
}
return ArchiveEncoding.Default.GetBytes(str);
}
internal Stream PackedStream { get; set; }
internal string Name { get; set; }
internal HeaderFlags Flags { get; set; }
internal ZipCompressionMethod CompressionMethod { get; set; }
internal uint CompressedSize { get; set; }
internal long? DataStartPosition { get; set; }
internal uint UncompressedSize { get; set; }
internal List<ExtraData> Extra { get; set; }
internal PkwareTraditionalEncryptionData PkwareTraditionalEncryptionData { get; set; }
#if !PORTABLE && !NETFX_CORE
internal WinzipAesEncryptionData WinzipAesEncryptionData { get; set; }
#endif
internal ushort LastModifiedDate { get; set; }
internal ushort LastModifiedTime { get; set; }
internal uint Crc { get; set; }
protected void LoadExtra(byte[] extra)
{
for (int i = 0; i < extra.Length;)
{
ExtraDataType type = (ExtraDataType) BitConverter.ToUInt16(extra, i);
if (!Enum.IsDefined(typeof (ExtraDataType), type))
{
return;
}
ushort length = BitConverter.ToUInt16(extra, i + 2);
byte[] data = new byte[length];
Buffer.BlockCopy(extra, i + 4, data, 0, length);
Extra.Add(new ExtraData
{
Type = type,
Length = length,
DataBytes = data
});
i += length + 4;
}
}
internal ZipFilePart Part { get; set; }
}
}
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