internal static ZipFile Read(string zipfilename, bool TurnOnDebug)
{
var zf = new ZipFile();
zf._Debug = TurnOnDebug;
zf.Name = zipfilename;
zf._entries = new List <ZipEntry>();
ZipEntry e;
while ((e = ZipEntry.Read(zf.ReadStream, zf._Debug)) != null)
{
if (zf._Debug)
{
Console.WriteLine(" ZipFile::Read(): ZipEntry: {0}", e.FileName);
}
zf._entries.Add(e);
}
// read the zipfile's central directory structure here.
zf._direntries = new List <ZipDirEntry>();
ZipDirEntry de;
while ((de = ZipDirEntry.Read(zf.ReadStream, zf._Debug)) != null)
{
if (zf._Debug)
{
Console.WriteLine(" ZipFile::Read(): ZipDirEntry: {0}", de.FileName);
}
zf._direntries.Add(de);
}
return(zf);
}
internal static ZipDirEntry Read(Stream s, bool TurnOnDebug)
{
var signature = Shared.ReadSignature(s);
// return null if this is not a local file header signature
if (SignatureIsNotValid(signature))
{
s.Seek(-4, SeekOrigin.Current);
if (TurnOnDebug)
{
Console.WriteLine(" ZipDirEntry::Read(): Bad signature ({0:X8}) at position {1}", signature,
s.Position);
}
return(null);
}
var block = new byte[42];
var n = s.Read(block, 0, block.Length);
if (n != block.Length)
{
return(null);
}
var i = 0;
var zde = new ZipDirEntry();
zde._Debug = TurnOnDebug;
zde.VersionMadeBy = (short)(block[i++] + block[i++] * 256);
zde.VersionNeeded = (short)(block[i++] + block[i++] * 256);
zde._BitField = (short)(block[i++] + block[i++] * 256);
zde.CompressionMethod = (short)(block[i++] + block[i++] * 256);
zde._LastModDateTime = block[i++] + block[i++] * 256 + block[i++] * 256 * 256 + block[i++] * 256 * 256 * 256;
zde._Crc32 = block[i++] + block[i++] * 256 + block[i++] * 256 * 256 + block[i++] * 256 * 256 * 256;
zde.CompressedSize = block[i++] + block[i++] * 256 + block[i++] * 256 * 256 + block[i++] * 256 * 256 * 256;
zde.UncompressedSize = block[i++] + block[i++] * 256 + block[i++] * 256 * 256 + block[i++] * 256 * 256 * 256;
zde.LastModified = Shared.PackedToDateTime(zde._LastModDateTime);
var filenameLength = (short)(block[i++] + block[i++] * 256);
var extraFieldLength = (short)(block[i++] + block[i++] * 256);
var commentLength = (short)(block[i++] + block[i++] * 256);
var diskNumber = (short)(block[i++] + block[i++] * 256);
var internalFileAttrs = (short)(block[i++] + block[i++] * 256);
var externalFileAttrs = block[i++] + block[i++] * 256 + block[i++] * 256 * 256 +
block[i++] * 256 * 256 * 256;
var Offset = block[i++] + block[i++] * 256 + block[i++] * 256 * 256 + block[i++] * 256 * 256 * 256;
block = new byte[filenameLength];
n = s.Read(block, 0, block.Length);
zde.FileName = Shared.StringFromBuffer(block, 0, block.Length);
zde._Extra = new byte[extraFieldLength];
n = s.Read(zde._Extra, 0, zde._Extra.Length);
block = new byte[commentLength];
n = s.Read(block, 0, block.Length);
zde.Comment = Shared.StringFromBuffer(block, 0, block.Length);
return(zde);
}
