ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
/*
Returns true (1) if file is being copied directly while reading, or false
- (0) if file is a gzip stream being decompressed. This state can change from
- false to true while reading the input file if the end of a gzip stream is
- reached, but is followed by data that is not another gzip stream.
+ (0) if file is a gzip stream being decompressed.
If the input file is empty, gzdirect() will return true, since the input
does not contain a gzip stream.