69 lines
1.9 KiB
Perl
69 lines
1.9 KiB
Perl
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% clp(q,r) version 1.3.3 %
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% %
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% (c) Copyright 1992,1993,1994,1995 %
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% Austrian Research Institute for Artificial Intelligence (OFAI) %
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% Schottengasse 3 %
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% A-1010 Vienna, Austria %
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% %
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% File: arith_r.pl %
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% Author: Christian Holzbaur christian@ai.univie.ac.at %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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:- module( arith_r,
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[
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arith_eps/1,
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arith_normalize/2,
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integerp/1,
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integerp/2
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]).
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%
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% Modules receiving R expansion
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%
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arith_module( clpr).
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arith_module( nfr).
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:- multifile
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user:goal_expansion/3.
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:- dynamic
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user:goal_expansion/3.
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%
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user:goal_expansion(arith_eval(Term,Res), Module, Expansion) :-
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arith_module( Module),
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compile_R( Term, Res, Code),
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l2conj( Code, Expansion).
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user:goal_expansion(arith_eval(Rel), Module, Expansion) :-
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arith_module( Module),
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compile_R( Rel, boolean, Code),
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l2conj( Code, Expansion).
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user:goal_expansion(case_signum(Term,Lt,Z,Gt), Module, Expansion) :-
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arith_module( Module),
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compile_case_signum_R( Term, Lt,Z,Gt, Code),
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l2conj( Code, Expansion).
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:- ensure_loaded( arith).
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%
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% This the only place where this constant lives
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%
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arith_eps( 1.0e-10). % for Monash #zero expansion 1.0e-12
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eps( 1.0e-10, -1.0e-10).
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arith_normalize( X, Norm) :- var(X), !,
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raise_exception( instantiation_error(arith_normalize(X,Norm),1)).
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arith_normalize( rat(N,D), Norm) :- rat_float( N,D, Norm).
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arith_normalize( X, Norm) :- number(X),
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Norm is float(X).
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integerp( X) :-
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floor(/*float?*/X)=:=X.
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integerp( X, I) :-
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floor(/*float?*/X)=:=X,
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I is integer(X).
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