- message-digest-chunk-fileno-read-maker #!optional CTORparameter
Supplies the procedure used to create an input procedure.
- CTOR
- (FD #!optional TOTAL SIZE) -> (-> byte-source)
- FD
- source open fileno
- TOTAL
- total size, default (file-size FD))
- SIZE
- chunk size, default (message-digest-chunk-size)
The default CTOR returns a reader conditioned on memory-mapped-file support.