void ModifyEntry( BlubbZipFile workFile, BlubbUpdate 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( BlubbZipFile workFile, BlubbUpdate update ) {
Stream source = null;
if( update.Entry.IsFile ) {
source = update.GetSource();
if( source == null ) {
source = 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 BlubbZipException( "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 ) {
BlubbZipHelperStream helper = new BlubbZipHelperStream( workFile.baseStream_ );
helper.WriteDataDescriptor( update.OutEntry );
}
}
} else {
workFile.WriteLocalEntryHeader( update );
update.OutEntry.CompressedSize = 0;
}
}