cannam@89: Possible upgrades to gzfilebuf:
cannam@89: 
cannam@89: - The ability to do putback (e.g. putbackfail)
cannam@89: 
cannam@89: - The ability to seek (zlib supports this, but could be slow/tricky)
cannam@89: 
cannam@89: - Simultaneous read/write access (does it make sense?)
cannam@89: 
cannam@89: - Support for ios_base::ate open mode
cannam@89: 
cannam@89: - Locale support?
cannam@89: 
cannam@89: - Check public interface to see which calls give problems
cannam@89:   (due to dependence on library internals)
cannam@89: 
cannam@89: - Override operator<<(ostream&, gzfilebuf*) to allow direct copying
cannam@89:   of stream buffer to stream ( i.e. os << is.rdbuf(); )