void RunUpdates()
{
long sizeEntries = 0;
long endOfStream = 0;
bool directUpdate = false;
long destinationPosition = 0; // NOT SFX friendly
ZipFile workFile;
if ( IsNewArchive ) {
workFile = this;
workFile.baseStream_.Position = 0;
directUpdate = true;
}
else if ( archiveStorage_.UpdateMode == FileUpdateMode.Direct ) {
workFile = this;
workFile.baseStream_.Position = 0;
directUpdate = true;
// Sort the updates by offset within copies/modifies, then adds.
// This ensures that data required by copies will not be overwritten.
updates_.Sort(new UpdateComparer());
}
else {
workFile = ZipFile.Create(archiveStorage_.GetTemporaryOutput());
workFile.UseZip64 = UseZip64;
if (key != null) {
workFile.key = (byte[])key.Clone();
}
}
try {
foreach ( ZipUpdate update in updates_ ) {
if (update != null) {
switch (update.Command) {
case UpdateCommand.Copy:
if (directUpdate) {
CopyEntryDirect(workFile, update, ref destinationPosition);
}
else {
CopyEntry(workFile, update);
}
break;
case UpdateCommand.Modify:
// TODO: Direct modifying of an entry will take some legwork.
ModifyEntry(workFile, update);
break;
case UpdateCommand.Add:
if (!IsNewArchive && directUpdate) {
workFile.baseStream_.Position = destinationPosition;
}
AddEntry(workFile, update);
if (directUpdate) {
destinationPosition = workFile.baseStream_.Position;
}
break;
}
}
}
if ( !IsNewArchive && directUpdate ) {
workFile.baseStream_.Position = destinationPosition;
}
long centralDirOffset = workFile.baseStream_.Position;
foreach ( ZipUpdate update in updates_ ) {
if (update != null) {
sizeEntries += workFile.WriteCentralDirectoryHeader(update.OutEntry);
}
}
byte[] theComment = (newComment_ != null) ? newComment_.RawComment : ZipConstants.ConvertToArray(comment_);
using ( ZipHelperStream zhs = new ZipHelperStream(workFile.baseStream_) ) {
zhs.WriteEndOfCentralDirectory(updateCount_, sizeEntries, centralDirOffset, theComment);
}
endOfStream = workFile.baseStream_.Position;
// And now patch entries...
foreach ( ZipUpdate update in updates_ ) {
if (update != null)
{
// If the size of the entry is zero leave the crc as 0 as well.
// The calculated crc will be all bits on...
if ((update.CrcPatchOffset > 0) && (update.OutEntry.CompressedSize > 0)) {
workFile.baseStream_.Position = update.CrcPatchOffset;
workFile.WriteLEInt((int)update.OutEntry.Crc);
}
if (update.SizePatchOffset > 0) {
workFile.baseStream_.Position = update.SizePatchOffset;
if (update.OutEntry.LocalHeaderRequiresZip64) {
workFile.WriteLeLong(update.OutEntry.Size);
workFile.WriteLeLong(update.OutEntry.CompressedSize);
}
else {
workFile.WriteLEInt((int)update.OutEntry.CompressedSize);
workFile.WriteLEInt((int)update.OutEntry.Size);
}
}
}
}
}
catch {
workFile.Close();
if (!directUpdate && (workFile.Name != null)) {
File.Delete(workFile.Name);
}
throw;
}
if (directUpdate) {
workFile.baseStream_.SetLength(endOfStream);
workFile.baseStream_.Flush();
isNewArchive_ = false;
ReadEntries();
}
else {
baseStream_.Close();
Reopen(archiveStorage_.ConvertTemporaryToFinal());
}
}
/// <summary>
/// Commit current updates, updating this archive.
/// </summary>
/// <seealso cref="BeginUpdate()"></seealso>
/// <seealso cref="AbortUpdate"></seealso>
/// <exception cref="ObjectDisposedException">ZipFile has been closed.</exception>
public void CommitUpdate()
{
if ( isDisposed_ ) {
throw new ObjectDisposedException("ZipFile");
}
CheckUpdating();
try {
updateIndex_.Clear();
updateIndex_=null;
if( contentsEdited_ ) {
RunUpdates();
}
else if( commentEdited_ ) {
UpdateCommentOnly();
}
else {
// Create an empty archive if none existed originally.
if( entries_.Length==0 ) {
byte[] theComment=(newComment_!=null)?newComment_.RawComment:ZipConstants.ConvertToArray(comment_);
using( ZipHelperStream zhs=new ZipHelperStream(baseStream_) ) {
zhs.WriteEndOfCentralDirectory(0, 0, 0, theComment);
}
}
}
}
finally {
PostUpdateCleanup();
}
}
