257 lines
7.4 KiB
Scheme
257 lines
7.4 KiB
Scheme
;;; Ikarus Scheme -- A compiler for R6RS Scheme.
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;;; Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
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;;;
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;;; This program is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License version 3 as
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;;; published by the Free Software Foundation.
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;;;
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;;; This program is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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(library (ikarus predicates)
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(export fixnum? flonum? bignum? ratnum? number? complex? real? rational?
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integer? exact? inexact? eof-object? bwp-object? immediate?
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boolean? char? vector? bytevector? string? procedure? null? pair?
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symbol? code? not weak-pair? eq? eqv? equal? boolean=?
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symbol=? finite? infinite? nan? real-valued?
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rational-valued? integer-valued? transcoder?)
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(import
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(except (ikarus) fixnum? flonum? bignum? ratnum? number? complex? real?
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rational? integer? exact? inexact? eof-object? bwp-object?
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immediate? boolean? char? vector? bytevector? string? procedure?
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null? pair? weak-pair? symbol? code? not eq? eqv? equal?
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transcoder? boolean=? symbol=?
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finite? infinite? nan? real-valued? rational-valued?
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integer-valued?)
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(ikarus system $fx)
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(ikarus system $flonums)
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(ikarus system $pairs)
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(ikarus system $chars)
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(ikarus system $strings)
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(ikarus system $vectors)
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(rename (only (ikarus) fixnum? flonum? bignum? ratnum? eof-object?
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bwp-object? immediate? boolean? char? vector? string?
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bytevector? procedure? null? pair? symbol? code? eq?
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transcoder?)
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(fixnum? sys:fixnum?)
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(flonum? sys:flonum?)
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(bignum? sys:bignum?)
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(ratnum? sys:ratnum?)
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(eof-object? sys:eof-object?)
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(bwp-object? sys:bwp-object?)
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(immediate? sys:immediate?)
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(boolean? sys:boolean?)
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(char? sys:char?)
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(vector? sys:vector?)
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(bytevector? sys:bytevector?)
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(string? sys:string?)
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(procedure? sys:procedure?)
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(null? sys:null?)
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(pair? sys:pair?)
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(symbol? sys:symbol?)
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(code? sys:code?)
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(eq? sys:eq?)
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(transcoder? sys:transcoder?)
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))
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(define fixnum?
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(lambda (x) (sys:fixnum? x)))
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(define bignum?
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(lambda (x) (sys:bignum? x)))
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(define ratnum?
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(lambda (x) (sys:ratnum? x)))
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(define flonum?
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(lambda (x) (sys:flonum? x)))
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(define number?
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(lambda (x)
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(or (sys:fixnum? x)
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(sys:bignum? x)
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(sys:flonum? x)
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(sys:ratnum? x))))
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(define complex?
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(lambda (x) (number? x)))
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(define real?
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(lambda (x) (number? x)))
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(define real-valued?
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(lambda (x) (number? x)))
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(define rational?
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(lambda (x)
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(cond
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[(sys:fixnum? x) #t]
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[(sys:bignum? x) #t]
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[(sys:ratnum? x) #t]
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[(sys:flonum? x) ($flonum-rational? x)]
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[else #f])))
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(define rational-valued?
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(lambda (x) (rational? x)))
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(define integer?
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(lambda (x)
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(cond
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[(sys:fixnum? x) #t]
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[(sys:bignum? x) #t]
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[(sys:ratnum? x) #f]
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[(sys:flonum? x) ($flonum-integer? x)]
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[else #f])))
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(define integer-valued?
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(lambda (x) (integer? x)))
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(define exact?
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(lambda (x)
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(cond
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[(sys:fixnum? x) #t]
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[(sys:bignum? x) #t]
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[(sys:ratnum? x) #t]
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[(sys:flonum? x) #f]
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[else
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(die 'exact? "not a number" x)])))
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(define inexact?
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(lambda (x)
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(cond
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[(sys:flonum? x) #t]
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[(sys:fixnum? x) #f]
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[(sys:bignum? x) #f]
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[(sys:ratnum? x) #f]
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[else
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(die 'inexact? "not a number" x)])))
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(define finite?
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(lambda (x)
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(cond
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[(sys:flonum? x) (flfinite? x)]
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[(sys:fixnum? x) #t]
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[(sys:bignum? x) #t]
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[(sys:ratnum? x) #t]
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[else
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(die 'finite? "not a number" x)])))
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(define infinite?
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(lambda (x)
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(cond
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[(sys:flonum? x) (flinfinite? x)]
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[(sys:fixnum? x) #f]
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[(sys:bignum? x) #f]
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[(sys:ratnum? x) #f]
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[else
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(die 'infinite? "not a number" x)])))
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(define nan?
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(lambda (x)
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(cond
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[(sys:flonum? x) (flnan? x)]
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[(sys:fixnum? x) #f]
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[(sys:bignum? x) #f]
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[(sys:ratnum? x) #f]
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[else
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(die 'nan? "not a number" x)])))
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(define eof-object? (lambda (x) (sys:eof-object? x)))
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(define bwp-object? (lambda (x) (sys:bwp-object? x)))
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(define transcoder? (lambda (x) (sys:transcoder? x)))
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(define immediate? (lambda (x) (sys:immediate? x)))
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(define boolean? (lambda (x) (sys:boolean? x)))
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(define char? (lambda (x) (sys:char? x)))
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(define vector? (lambda (x) (sys:vector? x)))
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(define bytevector? (lambda (x) (sys:bytevector? x)))
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(define string? (lambda (x) (sys:string? x)))
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(define procedure? (lambda (x) (sys:procedure? x)))
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(define null? (lambda (x) (sys:null? x)))
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(define pair? (lambda (x) (sys:pair? x)))
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(define symbol? (lambda (x) (sys:symbol? x)))
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(define code? (lambda (x) (sys:code? x)))
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(define weak-pair?
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(lambda (x)
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(and (pair? x)
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(foreign-call "ikrt_is_weak_pair" x))))
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(define not (lambda (x) (if x #f #t)))
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(define eq? (lambda (x y) (sys:eq? x y)))
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(define eqv?
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(lambda (x y)
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(or (sys:eq? x y)
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(and (number? x) (number? y) (= x y)))))
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(define boolean=?
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(lambda (x y)
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(if (sys:boolean? x)
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(if (sys:eq? x y)
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#t
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(if (sys:boolean? y)
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#f
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(die 'boolean=? "not a boolean" y)))
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(die 'boolean=? "not a boolean" x))))
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(define symbol=?
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(lambda (x y)
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(if (sys:symbol? x)
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(if (sys:eq? x y)
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#t
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(if (sys:symbol? y)
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#f
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(die 'symbol=? "not a symbol" y)))
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(die 'symbol=? "not a symbol" x))))
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(module (equal?)
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(define vector-loop
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(lambda (x y i n)
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(or ($fx= i n)
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(and (equal? ($vector-ref x i) ($vector-ref y i))
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(vector-loop x y ($fxadd1 i) n)))))
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(define string-loop
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(lambda (x y i n)
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(or ($fx= i n)
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(and ($char= ($string-ref x i) ($string-ref y i))
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(string-loop x y ($fxadd1 i) n)))))
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(define equal?
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(lambda (x y)
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(cond
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[(sys:eq? x y) #t]
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[(pair? x)
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(and (pair? y)
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(equal? ($car x) ($car y))
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(equal? ($cdr x) ($cdr y)))]
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[(vector? x)
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(and (vector? y)
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(let ([n ($vector-length x)])
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(and ($fx= n ($vector-length y))
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(vector-loop x y 0 n))))]
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[(string? x)
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(and (string? y)
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(let ([n ($string-length x)])
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(and ($fx= n ($string-length y))
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(string-loop x y 0 n))))]
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[(number? x) (and (number? y) (= x y))]
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[(sys:bytevector? x)
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(and (sys:bytevector? y) (bytevector=? x y))]
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[else #f]))))
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)
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