void ModifyEntry(HfsFile workFile, HfsUpdate 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(HfsFile workFile, HfsUpdate 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 HfsException("Entry size/stream size mismatch");
}
}
workFile.WriteLocalEntryHeader(update);
long dataStart = workFile.baseStream_.Position;
update.OutEntry.DataOffset = dataStart;
using (Stream output = workFile.GetOutputStream(update.OutEntry))
{
CopyBytes(update, output, source, sourceStreamLength, true);
}
long dataEnd = workFile.baseStream_.Position;
update.OutEntry.CompressedSize = update.OutEntry.Size = dataEnd - dataStart;
}
}
else
{
workFile.WriteLocalEntryHeader(update);
update.OutEntry.CompressedSize = 0;
}
}