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using System.Collections.Generic;
using System.IO;
using SharpCompress.Common;
using SharpCompress.Common.Zip;
using SharpCompress.Common.Zip.Headers;
namespace SharpCompress.Reader.Zip
{
internal class ZipReader : AbstractReader<ZipEntry, ZipVolume>
{
private readonly StreamingZipHeaderFactory headerFactory;
private readonly ZipVolume volume;
internal ZipReader(Stream stream, Options options, string password)
: base(options, ArchiveType.Zip)
{
volume = new ZipVolume(stream, options);
headerFactory = new StreamingZipHeaderFactory(password);
}
public override ZipVolume Volume
{
get { return volume; }
}
#region Open
/// <summary>
/// Opens a ZipReader for Non-seeking usage with a single volume
/// </summary>
/// <param name="stream"></param>
/// <param name="options"></param>
/// <param name="password"></param>
/// <returns></returns>
public static ZipReader Open(Stream stream, string password = null,
Options options = Options.KeepStreamsOpen)
{
stream.CheckNotNull("stream");
return new ZipReader(stream, options, password);
}
#endregion
internal override IEnumerable<ZipEntry> GetEntries(Stream stream)
{
foreach (ZipHeader h in headerFactory.ReadStreamHeader(stream))
{
if (h != null)
{
switch (h.ZipHeaderType)
{
case ZipHeaderType.LocalEntry:
{
yield return new ZipEntry(new StreamingZipFilePart(h as LocalEntryHeader,
stream));
}
break;
case ZipHeaderType.DirectoryEnd:
{
yield break;
}
}
}
}
}
}
}
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