open_hash_stream/3

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Predicate open_hash_stream/3

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Documentation
- Reference manual
- Packages
  - SWI-Prolog C-library
    - library(hash_stream): Maintain a hash on a stream
      - open_hash_stream/3
      - stream_hash/2

Availability::- use_module(library(hash_stream)).(can be autoloaded)

Source

[det]open_hash_stream(+OrgStream, -HashStream, +Options)

Open a filter stream on OrgStream that maintains a hash. The hash can be retrieved at any time using stream_hash/2. Provided options:

algorithm(+Algorithm): One of md5, sha1, sha224, sha256, sha384 or sha512. Default is sha1.
close_parent(+Bool): If true (default), closing the filter stream also closes the original (parent) stream.