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115 lines
3.1 KiB
C#
115 lines
3.1 KiB
C#
namespace FairyGUI.Utils
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{
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/// <summary>
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/// 一个简单的Zip文件处理类。不处理解压。
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/// </summary>
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public class ZipReader
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{
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/// <summary>
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///
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/// </summary>
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public class ZipEntry
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{
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public string name;
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public int compress;
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public uint crc;
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public int size;
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public int sourceSize;
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public int offset;
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public bool isDirectory;
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}
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ByteBuffer _stream;
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int _entryCount;
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int _pos;
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int _index;
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/// <summary>
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///
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/// </summary>
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/// <param name="stream"></param>
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public ZipReader(byte[] data)
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{
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_stream = new ByteBuffer(data);
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_stream.littleEndian = true;
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int pos = _stream.length - 22;
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_stream.position = pos + 10;
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_entryCount = _stream.ReadShort();
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_stream.position = pos + 16;
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_pos = _stream.ReadInt();
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}
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/// <summary>
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///
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/// </summary>
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public int entryCount
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{
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get { return _entryCount; }
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}
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/// <summary>
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///
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/// </summary>
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/// <returns></returns>
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public bool GetNextEntry(ZipEntry entry)
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{
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if (_index >= _entryCount)
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return false;
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_stream.position = _pos + 28;
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int len = _stream.ReadUshort();
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int len2 = _stream.ReadUshort() + _stream.ReadUshort();
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_stream.position = _pos + 46;
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string name = _stream.ReadString(len);
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name = name.Replace("\\", "/");
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entry.name = name;
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if (name[name.Length - 1] == '/') //directory
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{
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entry.isDirectory = true;
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entry.compress = 0;
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entry.crc = 0;
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entry.size = entry.sourceSize = 0;
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entry.offset = 0;
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}
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else
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{
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entry.isDirectory = false;
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_stream.position = _pos + 10;
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entry.compress = _stream.ReadUshort();
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_stream.position = _pos + 16;
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entry.crc = _stream.ReadUint();
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entry.size = _stream.ReadInt();
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entry.sourceSize = _stream.ReadInt();
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_stream.position = _pos + 42;
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entry.offset = _stream.ReadInt() + 30 + len;
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}
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_pos += 46 + len + len2;
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_index++;
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return true;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="name"></param>
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/// <returns></returns>
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public byte[] GetEntryData(ZipEntry entry)
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{
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byte[] data = new byte[entry.size];
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if (entry.size > 0)
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{
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_stream.position = entry.offset;
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_stream.ReadBytes(data, 0, entry.size);
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}
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return data;
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}
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}
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}
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