void ModifyEntry(ZipFile workFile, ZipUpdate update) { workFile.WriteLocalEntryHeader(update); var dataStart = workFile.baseStream_.Position; // TODO: This is slow if the changes don't effect the data!! if ( update.Entry.IsFile && (update.Filename != null) ) { using ( var output = workFile.GetOutputStream(update.OutEntry) ) { using ( var source = GetInputStream(update.Entry) ) { CopyBytes(update, output, source, source.Length, true); } } } var 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(); if ( source == null ) { source = updateDataSource_.GetSource(update.Entry, update.Filename); } } if ( source != null ) { using ( source ) { var 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); var dataStart = workFile.baseStream_.Position; using ( var output = workFile.GetOutputStream(update.OutEntry) ) { CopyBytes(update, output, source, sourceStreamLength, true); } var dataEnd = workFile.baseStream_.Position; update.OutEntry.CompressedSize = dataEnd - dataStart; if ((update.OutEntry.Flags & (int)GeneralBitFlags.Descriptor) == (int)GeneralBitFlags.Descriptor) { var helper = new ZipHelperStream(workFile.baseStream_); helper.WriteDataDescriptor(update.OutEntry); } } } else { workFile.WriteLocalEntryHeader(update); update.OutEntry.CompressedSize = 0; } }