Modul Console

Jan Burse, erstellt 07. Mai 2019
/**
* Read line utility based on ISO core standard.
*
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
*
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
*
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
*
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
*
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
:- module(console, [read_line/1]).
/**
* read_line(X):
* read_line(S, X):
* The predicate suceeds in X with a line, not including the end of
* line characters, or fails if we are at end of file. The binary
* arity predicate allows specifying an input stream.
*/
% read_line(-Atom)
read_line(S, X).
% read_line(+Stream, -Atom)
get_code(S, C),
read_line(S, C, L),
atom_codes(X, L).
% read_line(+Stream, +Code, -List)
read_line(_, -1, _) :- !, fail.
read_line(_, 0'\n, []) :- !.
read_line(S, C, [C|L]) :-
get_code(S, D),
read_line2(S, D, L).
% read_line2(+Stream, +Code, -List)
read_line2(_, -1, []) :- !.
read_line2(_, 0'\n, []) :- !.
read_line2(S, C, [C|L]) :-
get_code(S, D),
read_line2(S, D, L).

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