void ModifyEntry(ZipFile workFile, ZipUpdate update)
{
workFile.WriteLocalEntryHeader(update);
long dataStart = workFile._baseStream.Position;
// TODO: This is slow if the changes don't effect the data!!
if ( update.Entry.IsFile && (update.Filename != null) ) {
using ( Stream output = workFile.GetOutputStream(update.OutEntry) ) {
using ( Stream source = this.GetInputStream(update.Entry) ) {
CopyBytes(update, output, source, source.Length, true);
}
}
}
long dataEnd = workFile._baseStream.Position;
update.Entry.CompressedSize = dataEnd - dataStart;
}
void AddEntry(ZipFile workFile, ZipUpdate update)
{
Stream source = null;
if ( update.Entry.IsFile ) {
source = update.GetSource() ?? _updateDataSource.GetSource(update.Entry, update.Filename);
}
if ( source != null ) {
using ( source ) {
long sourceStreamLength = source.Length;
if ( update.OutEntry.Size < 0 ) {
update.OutEntry.Size = sourceStreamLength;
}
else {
// Check for errant entries.
if ( update.OutEntry.Size != sourceStreamLength ) {
throw new ZipException("Entry size/stream size mismatch");
}
}
workFile.WriteLocalEntryHeader(update);
long dataStart = workFile._baseStream.Position;
using ( Stream output = workFile.GetOutputStream(update.OutEntry) ) {
CopyBytes(update, output, source, sourceStreamLength, true);
}
long dataEnd = workFile._baseStream.Position;
update.OutEntry.CompressedSize = dataEnd - dataStart;
if ((update.OutEntry.Flags & (int)GeneralBitFlags.Descriptor) == (int)GeneralBitFlags.Descriptor)
{
ZipHelperStream helper = new ZipHelperStream(workFile._baseStream);
helper.WriteDataDescriptor(update.OutEntry);
}
}
}
else {
workFile.WriteLocalEntryHeader(update);
update.OutEntry.CompressedSize = 0;
}
}