public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
{
command_ = UpdateCommand.Add;
entry_ = new ZipEntry(entryName);
entry_.CompressionMethod = compressionMethod;
#if FORCE_ZIP64
entry_.ForceZip64();
#endif
dataSource_ = dataSource;
}
public ZipUpdate(string fileName, string entryName, CompressionMethod compressionMethod)
{
command_ = UpdateCommand.Add;
entry_ = new ZipEntry(entryName);
#if FORCE_ZIP64
entry_.ForceZip64();
#endif
entry_.CompressionMethod = compressionMethod;
filename_ = fileName;
}
public ZipUpdate(string fileName, string entryName)
{
command_ = UpdateCommand.Add;
entry_ = new ZipEntry(entryName);
#if FORCE_ZIP64
entry_.ForceZip64();
#endif
filename_ = fileName;
}
/// <summary>
/// Starts a new Zip entry. It automatically closes the previous
/// entry if present.
/// All entry elements bar name are optional, but must be correct if present.
/// If the compression method is stored and the output is not patchable
/// the compression for that entry is automatically changed to deflate level 0
/// </summary>
/// <param name="entry">
/// the entry.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// if entry passed is null.
/// </exception>
/// <exception cref="System.IO.IOException">
/// if an I/O error occured.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// if stream was finished
/// </exception>
/// <exception cref="ZipException">
/// Too many entries in the Zip file<br/>
/// Entry name is too long<br/>
/// Finish has already been called<br/>
/// </exception>
public void PutNextEntry(ZipEntry entry)
{
if ( entry == null ) {
throw new ArgumentNullException("entry");
}
if (entries == null) {
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null) {
CloseEntry();
}
if (entries.Count == int.MaxValue) {
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod method = entry.CompressionMethod;
int compressionLevel = defaultCompressionLevel;
entry.Flags = 0;
patchEntryHeader = false;
bool headerInfoAvailable = true;
if (method == CompressionMethod.Stored) {
// Cant store values in a data descriptor as you cant extract stored files
// if the length isnt known.
entry.Flags &= ~8;
if (entry.CompressedSize >= 0) {
if (entry.Size < 0) {
entry.Size = entry.CompressedSize;
} else if (entry.Size != entry.CompressedSize) {
throw new ZipException("Method STORED, but compressed size != size");
}
} else {
if (entry.Size >= 0) {
entry.CompressedSize = entry.Size;
}
}
if (entry.Size < 0 || entry.Crc < 0) {
if (CanPatchEntries == true) {
headerInfoAvailable = false;
}
else {
// Can't patch entries so storing is not possible.
method = CompressionMethod.Deflated;
compressionLevel = 0;
}
}
}
if (method == CompressionMethod.Deflated) {
if (entry.Size == 0) {
// No need to compress - no data.
entry.CompressedSize = entry.Size;
entry.Crc = 0;
method = CompressionMethod.Stored;
} else if ( (entry.CompressedSize < 0) || (entry.Size < 0) || (entry.Crc < 0) ) {
headerInfoAvailable = false;
}
}
if (headerInfoAvailable == false) {
if (CanPatchEntries == false) {
// Only way to record size and compressed size is to append a data descriptor
// after compressed data.
entry.Flags |= 8;
} else {
patchEntryHeader = true;
}
}
if (Password != null) {
entry.IsCrypted = true;
if (entry.Crc < 0) {
// Need to append a data descriptor as the crc isnt available for use
// with encryption, the date is used instead. Setting the flag
// indicates this to the decompressor.
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = (CompressionMethod)method;
curMethod = method;
// Write the local file header
WriteLeInt(ZipConstants.LocalHeaderSignature);
// This is safe/conservative but can enlarge archives slightly when not needed.
// Perhaps implement something to allow a choice here?
#if !FORCE_ZIP64
if ( entry.Size < 0 )
#endif
{
entry.ForceZip64();
}
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte)method);
WriteLeInt((int)entry.DosTime);
// TODO: Refactor header writing. Its done in several places.
if (headerInfoAvailable == true) {
WriteLeInt((int)entry.Crc);
if ( entry.LocalHeaderRequiresZip64 ) {
WriteLeInt(-1);
WriteLeInt(-1);
}
else {
WriteLeInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLeInt((int)entry.Size);
}
} else {
if (patchEntryHeader == true) {
crcPatchPos = baseOutputStream.Position;
}
WriteLeInt(0); // Crc
if ( patchEntryHeader ) {
sizePatchPos = baseOutputStream.Position;
}
// For local header both sizes appear in Zip64 Extended Information
if ( entry.LocalHeaderRequiresZip64 ) {
WriteLeInt(-1);
WriteLeInt(-1);
}
else {
WriteLeInt(0); // Compressed size
WriteLeInt(0); // Uncompressed size
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Name);
if (name.Length > 0xFFFF) {
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if ( entry.LocalHeaderRequiresZip64 ) {
ed.StartNewEntry();
ed.AddLeLong(-1);
ed.AddLeLong(-1);
ed.AddNewEntry(1);
if ( !ed.Find(1) ) {
throw new ZipException("Internal error cant find extra data");
}
if ( patchEntryHeader ) {
sizePatchPos = ed.CurrentReadIndex;
}
}
else {
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLeShort(name.Length);
WriteLeShort(extra.Length);
if ( name.Length > 0 ) {
baseOutputStream.Write(name, 0, name.Length);
}
if ( entry.LocalHeaderRequiresZip64 && patchEntryHeader ) {
sizePatchPos += baseOutputStream.Position;
}
if ( extra.Length > 0 ) {
baseOutputStream.Write(extra, 0, extra.Length);
}
offset += ZipConstants.LocalHeaderBaseSize + name.Length + extra.Length;
// Activate the entry.
curEntry = entry;
crc.Reset();
if (method == CompressionMethod.Deflated) {
def.Reset();
def.SetLevel(compressionLevel);
}
size = 0;
if (entry.IsCrypted == true) {
if (entry.Crc < 0) { // so testing Zip will says its ok
WriteEncryptionHeader(entry.DosTime << 16);
} else {
WriteEncryptionHeader(entry.Crc);
}
}
}
