/// <summary>
/// This will throw if the zipfile does not exist.
/// </summary>
public static ZipFile Read(string zipFileName)
{
if (zipFileName == null)
{
throw new ArgumentNullException("zipFileName");
}
ZipFile zf = new ZipFile();
zf.m_FileName = zipFileName;
using (Stream readStream = File.OpenRead(zipFileName))
{
ZipEntry e;
while ((e = ZipEntry.Read(readStream)) != null)
{
zf.m_Entries.Add(e);
}
// read the zipfile's central directory structure here.
ZipDirEntry de;
while ((de = ZipDirEntry.Read(readStream)) != null)
{
zf.m_DirEntries.Add(de);
}
}
return(zf);
}
public static ZipDirEntry Read(Stream s)
{
int signature = Shared.ReadSignature(s);
// return null if this is not a local file header signature
if (SignatureIsNotValid(signature))
{
s.Seek(-4, SeekOrigin.Current);
return(null);
}
ZipDirEntry zde = new ZipDirEntry();
BinaryReader br = new BinaryReader(s);
zde.m_VersionMadeBy = br.ReadInt16();
zde.m_VersionNeeded = br.ReadInt16();
zde.m_BitField = br.ReadInt16();
zde.m_CompressionMethod = br.ReadInt16();
zde.m_LastModDateTime = br.ReadInt32();
zde.m_Crc32 = br.ReadInt32();
zde.m_CompressedSize = br.ReadInt32();
zde.m_UncompressedSize = br.ReadInt32();
zde.m_LastModified = Shared.PackedToDateTime(zde.m_LastModDateTime);
Int16 fileNameLength = br.ReadInt16();
Int16 extraFieldLength = br.ReadInt16();
Int16 commentLength = br.ReadInt16();
Int16 diskNumber = br.ReadInt16();
Int16 internalFileAttrs = br.ReadInt16();
Int32 externalFileAttrs = br.ReadInt32();
Int32 offset = br.ReadInt32();
byte[] block = br.ReadBytes(fileNameLength);
if (block.Length != fileNameLength)
{
throw new Exception("Invalid filename block.");
}
zde.m_FileName = Shared.StringFromBuffer(block);
zde.m_Extra = br.ReadBytes(extraFieldLength);
if (zde.m_Extra.Length != extraFieldLength)
{
throw new Exception("Invalid extra block.");
}
block = br.ReadBytes(commentLength);
if (block.Length != commentLength)
{
throw new Exception("Invalid comment block.");
}
zde.m_Comment = Shared.StringFromBuffer(block);
return(zde);
}
