This module emulates the SICStus library codesio.pl for reading and writing from/to lists of character codes. Most of these predicates are straight calls into similar SWI-Prolog primitives.

This library is based on library(charsio) that originates from Quintus Prolog. The naming is updated to reflect the ISO naming conventions and the ISO predicates atom_codes/2, etc are obviously removed from this library.

Compatibility

- SICStus 4

 format_to_codes(+Format, +Args, -Codes) is det

Use format/2 to write to a list of character codes.

 format_to_codes(+Format, +Args, -Codes, ?Tail) is det

Use format/2 to write to a difference list of character codes.

 write_to_codes(+Term, -Codes)

Codes is a list of character codes produced by write/1 on Term.

 write_to_codes(+Term, -Codes, ?Tail)

Codes is a difference-list of character codes produced by write/1 on Term.

 write_term_to_codes(+Term, -Codes, +Options) is det

True when Codes is a string that matches the output of write_term/3 using Options.

 write_term_to_codes(+Term, -Codes, ?Tail, +Options) is det

True when Codes\Tail is a difference list containing the character codes that matches the output of write_term/3 using Options.

 read_from_codes(+Codes, -Term) is det

Read Codes into Term.

Compatibility

- The SWI-Prolog version does not require Codes to end in a full-stop.

 read_term_from_codes(+Codes, -Term, +Options) is det

Read Codes into Term. Options are processed by read_term/3.

Compatibility

- sicstus

 open_codes_stream(+Codes, -Stream) is det

Open Codes as an input stream.

See also

- open_string/2.

 with_output_to_codes(:Goal, Codes) is det

Run Goal with as once/1. Output written to current_output is collected in Codes.

 with_output_to_codes(:Goal, -Codes, ?Tail) is det

Run Goal with as once/1. Output written to current_output is collected in Codes\Tail.

 with_output_to_codes(:Goal, -Stream, -Codes, ?Tail) is det

As with_output_to_codes/3, but Stream is unified with the temporary stream. This predicate exists for compatibility reasons. In SWI-Prolog, the temporary stream is also available as current_output.