| public WriteUInt32 ( uint value ) : void | ||
| value | uint | The value to write. |
| return | void | |
/// <summary>
/// Implementation of writing an archive directory to the stream.
/// </summary>
/// <param name="writer">The writer stream.</param>
private void WriteArchiveDirectoryToStream(Stream writer)
{
// Write the directory entries.
long startOfDirectory = writer.Position;
foreach (ZipArchiveFile entry in _entries.Values)
{
entry.WriteArchiveDirectoryEntryToStream(writer);
}
long endOfDirectory = writer.Position;
// Write the trailer
ByteBuffer trailer = new ByteBuffer(22);
trailer.WriteUInt32(ZipArchiveFile.SignatureArchiveDirectoryEnd);
trailer.WriteUInt16(ZipArchiveFile.DiskNumberStart);
trailer.WriteUInt16(ZipArchiveFile.DiskNumberStart);
trailer.WriteUInt16((ushort)_entries.Count);
trailer.WriteUInt16((ushort)_entries.Count);
trailer.WriteUInt32((uint)(endOfDirectory - startOfDirectory)); // directory size
trailer.WriteUInt32((uint)startOfDirectory); // directory start
trailer.WriteUInt16((ushort)ZipArchiveFile.FileCommentLength);
trailer.WriteContentsTo(writer);
}
/// <summary>
/// Writes an archive directory entry to stream.
/// </summary>
/// <param name="writer">The writer stream.</param>
internal void WriteArchiveDirectoryEntryToStream(Stream writer)
{
// File header (in central directory):
//
// central file header signature 4 bytes (0x02014b50)
// version made by 2 bytes
// version needed to extract 2 bytes
// general purpose bit flag 2 bytes
// compression method 2 bytes
// last mod file time 2 bytes
// last mod file date 2 bytes
// crc-32 4 bytes
// compressed size 4 bytes
// uncompressed size 4 bytes
// file name length 2 bytes
// extra field length 2 bytes
// file comment length 2 bytes
// disk number start 2 bytes
// internal file attributes 2 bytes
// external file attributes 4 bytes
// relative offset of local header 4 bytes
//
// file name (variable size)
// extra field (variable size)
// file comment (variable size)
byte[] fileNameBytes = Encoding.UTF8.GetBytes(_name);
ByteBuffer header = new ByteBuffer(46);
header.WriteUInt32(SignatureArchiveDirectory);
header.WriteUInt16(VersionMadeBy);
header.WriteUInt16(VersionNeededToExtract);
header.WriteUInt16(GeneralPurposeBitFlag);
header.WriteUInt16((ushort)_compressionMethod);
header.WriteUInt32(DateTimeToDosTime(_lastWriteTime));
header.WriteUInt32(CheckSum);
header.WriteUInt32((uint)_compressedLength);
header.WriteUInt32((uint)Length);
header.WriteUInt16((ushort)fileNameBytes.Length);
header.WriteUInt16(ExtraFieldLength);
header.WriteUInt16(FileCommentLength);
header.WriteUInt16(DiskNumberStart);
header.WriteUInt16(InternalFileAttributes);
header.WriteUInt32(ExternalFileAttributes);
header.WriteUInt32(_headerOffset);
header.WriteContentsTo(writer);
writer.Write(fileNameBytes, 0, fileNameBytes.Length);
}
/// <summary>
/// Implementation of writing an archive directory to the stream.
/// </summary>
/// <param name="writer">The writer stream.</param>
private void WriteArchiveDirectoryToStream(Stream writer)
{
// Write the directory entries.
long startOfDirectory = writer.Position;
foreach (ZipArchiveFile entry in _entries.Values)
{
entry.WriteArchiveDirectoryEntryToStream(writer);
}
long endOfDirectory = writer.Position;
// Write the trailer
ByteBuffer trailer = new ByteBuffer(22);
trailer.WriteUInt32(ZipArchiveFile.SignatureArchiveDirectoryEnd);
trailer.WriteUInt16(ZipArchiveFile.DiskNumberStart);
trailer.WriteUInt16(ZipArchiveFile.DiskNumberStart);
trailer.WriteUInt16((ushort)_entries.Count);
trailer.WriteUInt16((ushort)_entries.Count);
trailer.WriteUInt32((uint)(endOfDirectory - startOfDirectory)); // directory size
trailer.WriteUInt32((uint)startOfDirectory); // directory start
trailer.WriteUInt16((ushort)ZipArchiveFile.FileCommentLength);
trailer.WriteContentsTo(writer);
}
/// <summary>
/// Writes an archive directory entry to stream.
/// </summary>
/// <param name="writer">The writer stream.</param>
internal void WriteArchiveDirectoryEntryToStream(Stream writer)
{
// File header (in central directory):
//
// central file header signature 4 bytes (0x02014b50)
// version made by 2 bytes
// version needed to extract 2 bytes
// general purpose bit flag 2 bytes
// compression method 2 bytes
// last mod file time 2 bytes
// last mod file date 2 bytes
// crc-32 4 bytes
// compressed size 4 bytes
// uncompressed size 4 bytes
// file name length 2 bytes
// extra field length 2 bytes
// file comment length 2 bytes
// disk number start 2 bytes
// internal file attributes 2 bytes
// external file attributes 4 bytes
// relative offset of local header 4 bytes
//
// file name (variable size)
// extra field (variable size)
// file comment (variable size)
byte[] fileNameBytes = Encoding.UTF8.GetBytes(_name);
ByteBuffer header = new ByteBuffer(46);
header.WriteUInt32(SignatureArchiveDirectory);
header.WriteUInt16(VersionMadeBy);
header.WriteUInt16(VersionNeededToExtract);
header.WriteUInt16(GeneralPurposeBitFlag);
header.WriteUInt16((ushort)_compressionMethod);
header.WriteUInt32(DateTimeToDosTime(_lastWriteTime));
header.WriteUInt32(CheckSum);
header.WriteUInt32((uint)_compressedLength);
header.WriteUInt32((uint)Length);
header.WriteUInt16((ushort)fileNameBytes.Length);
header.WriteUInt16(ExtraFieldLength);
header.WriteUInt16(FileCommentLength);
header.WriteUInt16(DiskNumberStart);
header.WriteUInt16(InternalFileAttributes);
header.WriteUInt32(ExternalFileAttributes);
header.WriteUInt32(_headerOffset);
header.WriteContentsTo(writer);
writer.Write(fileNameBytes, 0, fileNameBytes.Length);
}
/// <summary>
/// Writes the Zip file header to the stream.
/// </summary>
/// <param name="writer">Stream to write to.</param>
private void WriteZipFileHeader(Stream writer)
{
byte[] fileNameBytes = Encoding.UTF8.GetBytes(_name.Replace(Path.DirectorySeparatorChar, '/'));
if ((uint)_length != _length)
{
throw new InvalidOperationException("File length too long.");
}
// Local file header:
//
// local file header signature 4 bytes (0x04034b50)
// version needed to extract 2 bytes
// general purpose bit flag 2 bytes
// compression method 2 bytes
// last mod file time 2 bytes
// last mod file date 2 bytes
// crc-32 4 bytes
// compressed size 4 bytes
// uncompressed size 4 bytes
// file name length 2 bytes
// extra field length 2 bytes
//
// file name (variable size)
// extra field (variable size)
// Save the start of the header file for later use in the dir entry
_headerOffset = (uint)writer.Position;
ByteBuffer header = new ByteBuffer(30);
header.WriteUInt32(SignatureFileEntry);
header.WriteUInt16(VersionNeededToExtract);
header.WriteUInt16(GeneralPurposeBitFlag);
header.WriteUInt16((ushort)_compressionMethod);
header.WriteUInt32(DateTimeToDosTime(_lastWriteTime));
header.WriteUInt32(CheckSum);
header.WriteUInt32((uint)_compressedLength);
header.WriteUInt32((uint)Length);
header.WriteUInt16((ushort)fileNameBytes.Length);
header.WriteUInt16(ExtraFieldLength); // extra field length (unused)
header.WriteContentsTo(writer);
writer.Write(fileNameBytes, 0, fileNameBytes.Length); // write the archiveFile name
}