140 lines
4.2 KiB
Perl
140 lines
4.2 KiB
Perl
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% clp(q,r) version 1.3.2 %
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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: printf.pl %
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% Author: Christian Holzbaur christian@ai.univie.ac.at %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% a mockup for clp(R) printf/2
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%
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:- module( printf, [printf/1,printf/2]).
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printf( A) :- printf( A, []).
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printf([], _).
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/* obsolete as of sicstus3 with escape sequences
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printf([0'\,Ch|Fmt],Args) :- !,
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printf_special(Ch),
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printf(Fmt,Args).
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*/
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printf([0'%|Spec],Args) :- !,
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argspec(Args,Restargs,Spec,Rest),
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printf(Rest,Restargs).
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printf([Ch|Fmt],Args) :-
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put(Ch),
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printf(Fmt,Args).
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printf_special( 0'n) :- !, nl.
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printf_special( 0't) :- !, put( 9).
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printf_special( 0'r) :- !, put(13).
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printf_special( 0'b) :- !, put( 8).
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printf_special( 0'f) :- !, put(12).
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printf_special( N) :- put(N).
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argspec(Ai,Ao) --> format_prefix( Prefix),
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format_action( Prefix, Ai,Ao).
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format_prefix( -Pref) --> "-", !, format_prefix_1(Pref).
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format_prefix( +Pref) --> format_prefix_1(Pref).
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format_prefix_1( two(0,N2)) --> ".", !, format_digits(N2).
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format_prefix_1( two(N1,N2)) --> format_digits(N1), ".", !,
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format_digits(N2).
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format_prefix_1( one(N1)) --> format_digits(N1), !.
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format_prefix_1( none) --> [].
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format_digits( N) --> [D],
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{
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D >= "0",
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D =< "9",
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N0 is D-0'0
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},
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format_digits( N0,N).
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format_digits( N0,N2) --> [D],
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{
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D >= "0",
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D =< "9",
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!,
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N1 is D-0'0 + N0*10
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},
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format_digits( N1,N2).
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format_digits( N0,N0) --> [].
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format_action( Prefix, Ai,Ao) --> [F],
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{
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format_action_1( F, Prefix, Ai, Ao), !
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}.
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format_action( +none, [A|As], As) --> % 0'% without further spec.
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{
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( number(A) ->
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format( "~5g", [A])
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;
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print(A)
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)
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}.
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fmt_norm( rat(N,D), Norm) :- !, ( D=1 -> Norm=N ; Norm is N/D ).
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fmt_norm( N, N).
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format_action_1( 0'e, Prefix, [A|As], As) :- fmt_norm( A, An), action_e( Prefix, An).
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format_action_1( 0'f, Prefix, [A|As], As) :- fmt_norm( A, An), action_f( Prefix, An).
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format_action_1( 0'g, Prefix, [A|As], As) :- fmt_norm( A, An), action_g( Prefix, An).
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format_action_1( 0'%, _, A, A) :- put("%").
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%
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% todo
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%
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format_action_1( 0'd, Prefix, [A|As], As) :-
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fmt_norm( A, An),
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Ani is integer(round(An)),
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action_d( Prefix, Ani).
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format_action_1( 0'o, _Prefix, [A|As], As) :- print(A).
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format_action_1( 0'x, _Prefix, [A|As], As) :- print(A).
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format_action_1( 0'c, _Prefix, [A|As], As) :- print(A).
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format_action_1( 0'u, _Prefix, [A|As], As) :- print(A).
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format_action_1( 0's, _Prefix, [A|As], As) :- print(A).
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action_d( +one(A), X) :- format( "~|~t~d~*+", [X,A]).
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action_d( +none, X) :- format( "~d", [X]).
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action_d( -one(A), X) :- format( "~|~d~t~*+", [X,A]).
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action_d( -none, X) :- format( "~d", [X]).
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action_e( +two(A,B), X) :- format( "~|~t~*e~*+", [B,X,A]).
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action_e( +one(B), X) :- format( "~|~t~e~*+", [X,B]).
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action_e( +none, X) :- format( "~e", [X]).
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action_e( -two(A,B), X) :- format( "~|~*e~t~*+", [B,X,A]).
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action_e( -one(B), X) :- format( "~|~e~t~*+", [X,B]).
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action_e( -none, X) :- format( "~e", [X]).
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action_f( +two(A,B), X) :- format( "~|~t~*f~*+", [B,X,A]).
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action_f( +one(B), X) :- format( "~|~t~f~*+", [X,B]).
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action_f( +none, X) :- format( "~f", [X]).
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action_f( -two(A,B), X) :- format( "~|~*f~t~*+", [B,X,A]).
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action_f( -one(B), X) :- format( "~|~f~t~*+", [X,B]).
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action_f( -none, X) :- format( "~f", [X]).
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action_g( +two(A,B), X) :- format( "~|~t~*g~*+", [B,X,A]).
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action_g( +one(B), X) :- format( "~|~t~g~*+", [X,B]).
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action_g( +none, X) :- format( "~g", [X]).
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action_g( -two(A,B), X) :- format( "~|~*g~t~*+", [B,X,A]).
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action_g( -one(B), X) :- format( "~|~g~t~*+", [X,B]).
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action_g( -none, X) :- format( "~g", [X]).
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