mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-21 02:31:50 +03:00
306 lines
9.2 KiB
Scheme
306 lines
9.2 KiB
Scheme
; Block all reductions (e.g. needed when quoting under a 'delay')
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(define ct-blockAll
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(make-thread-parameter #f))
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(define (ct-isBlockAll)
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(ct-blockAll))
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(define (ct-setBlockAll x)
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(ct-blockAll x))
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; Check encodings of normal forms
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(define (ct-isDataCon val)
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(and (vector? val) (>= (vector-ref val 0) 0)))
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(define (ct-isConstant val)
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(or (number? val) (string? val) (char? val)
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(and (vector? val) (<= (vector-ref val 0) -100))))
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(define (ct-isTypeCon val)
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(and (vector? val) (= (vector-ref val 0) -1)))
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(define (ct-isBlocked val)
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(and (vector? val) (= (vector-ref val 0) -2)))
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(define (ct-isPi val)
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(and (vector? val) (= (vector-ref val 0) -3)))
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(define (ct-isTypeMatchable val)
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(or (ct-isTypeCon val) (ct-isPi val)))
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(define (ct-isDelay val)
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(and (vector? val) (= (vector-ref val 0) -4)))
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(define (ct-isForce val)
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(and (vector? val) (= (vector-ref val 0) -5)))
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(define (ct-isErased val)
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(and (vector? val) (= (vector-ref val 0) -6)))
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(define (ct-isType val)
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(and (vector? val) (= (vector-ref val 0) -7)))
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(define (ct-isLambda val)
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(and (vector? val) (= (vector-ref val 0) -8)))
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(define (ct-isTopLambda val)
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(and (vector? val) (= (vector-ref val 0) -9)))
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; A function might be a blocked application, which is represented as
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; a vector (-1, name, args), so make a new vector extending args
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; (or a meta, which is a vector (-10, name, args))
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(define (ct-addArg f a)
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(if (vector? f)
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(vector (vector-ref f 0) (vector-ref f 1)
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(append (vector-ref f 2) (list a)))
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(vector -11 f (list a))))
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; to apply a function, either run it if it is a function, or add
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; a blocked argument if it's stuck
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(define (ct-app f a)
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(cond
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[(ct-isTopLambda f) ((vector-ref f 2) a)]
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[(ct-isLambda f) ((vector-ref f 1) a)]
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[(procedure? f) (f a)]
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[else (ct-addArg f a)]))
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; force a delayed evaluation
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(define (ct-doForce arg default)
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(if (ct-isDelay arg)
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((vector-ref arg 4))
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default))
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; primitives
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(define (ct-toSignedInt x bits)
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(if (logbit? bits x)
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(logor x (ash -1 bits))
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(logand x (sub1 (ash 1 bits)))))
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(define (ct-toUnsignedInt x bits)
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(logand x (sub1 (ash 1 bits))))
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(define ct-u+ (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toUnsignedInt (+ xval yval) bits)))))
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(define ct-u- (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toUnsignedInt (- xval yval) bits)))))
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(define ct-u* (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toUnsignedInt (* xval yval) bits)))))
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(define ct-u/ (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toUnsignedInt (quotient xval yval) bits)))))
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(define ct-s+ (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toSignedInt (+ xval yval) bits)))))
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(define ct-s- (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toSignedInt (- xval yval) bits)))))
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(define ct-s* (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toSignedInt (* xval yval) bits)))))
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(define ct-s/ (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toSignedInt (quotient xval yval) bits)))))
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(define ct+ (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (+ xval yval)))))
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(define ct- (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (- xval yval)))))
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(define ct* (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (* xval yval)))))
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(define ct/ (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (quotient xval yval)))))
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(define ct-mod (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (remainder xval yval)))))
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(define ct-neg (lambda (x)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))]
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(vector tag (- xval)))))
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(define ct-bits-shl-signed (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ct-toSignedInt (shl xval yval) bits)))))
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(define ct-bits-shl (lambda (x y bits)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (remainder (ash xval yval) (ash 1 bits))))))
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(define ct-shl (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ash xval yval)))))
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(define ct-shr (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (ash xval (- yval))))))
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(define ct-and (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (logand xval yval)))))
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(define ct-or (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (logor xval yval)))))
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(define ct-xor (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(vector tag (logxor xval yval)))))
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(define ct-string-ref (lambda (x i)
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(let [(ival (vector-ref i 1))]
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(if (and (>= ival 0) (< ival (string-length x)))
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(string-ref x ival)
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'()))))
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(define ct-string-cons (lambda (x y) (string-append (string x) y)))
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(define ct-string-reverse (lambda (x)
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(list->string (reverse (string->list x)))))
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(define (ct-string-substr offin lenin s)
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(let* [(off (vector-ref offin 1))
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(len (vector-ref lenin 1))
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(l (string-length s))
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(b (max 0 off))
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(x (max 0 len))
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(end (min l (+ b x)))]
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(if (> b l)
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""
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(substring s b end))))
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; Don't wrap the result for bool results, we do that in Builtins.idr
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(define ct< (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(< xval yval))))
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(define ct<= (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(<= xval yval))))
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(define ct= (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(= xval yval))))
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(define ct>= (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(>= xval yval))))
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(define ct> (lambda (x y)
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(let [(tag (vector-ref x 0))
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(xval (vector-ref x 1))
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(yval (vector-ref y 1))]
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(> xval yval))))
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; casts
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; when targetting integers, we add the Vector on the Idris side
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(define ct-cast-num
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(lambda (x)
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(if (number? x) x 0)))
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(define destroy-prefix
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(lambda (x)
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(cond
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((equal? x "") "")
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((equal? (string-ref x 0) #\#) "")
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(else x))))
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(define ct-cast-string-double
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(lambda (x)
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(cast-num (string->number (destroy-prefix x)))))
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(define ct-cast-char-boundedInt
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(lambda (x y)
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(ct-toSignedInt (char->integer x) y)))
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(define ct-cast-char-boundedUInt
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(lambda (x y)
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(ct-toUnsignedInt (char->integer x) y)))
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(define ct-cast-int-char
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(lambda (xin)
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(let [(x (vector-ref xin 1))]
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(if (or
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(and (>= x 0) (<= x #xd7ff))
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(and (>= x #xe000) (<= x #x10ffff)))
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(integer->char x)
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(integer->char 0)))))
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(define ct-cast-signed
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(lambda (xin bits)
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(let [(x (vector-ref xin 1))]
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(ct-toSignedInt x bits))))
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(define ct-cast-unsigned
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(lambda (xin bits)
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(let [(x (vector-ref xin 1))]
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(ct-toUnsignedInt x bits))))
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(define ct-cast-string-int
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(lambda (x)
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(exact-truncate (cast-num (string->number (destroy-prefix x))))))
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(define ct-cast-string-boundedInt
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(lambda (x y)
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(blodwen-toSignedInt (cast-string-int x) y)))
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(define ct-cast-string-boundedUInt
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(lambda (x y)
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(blodwen-toUnsignedInt (cast-string-int x) y)))
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(define ct-cast-number-string
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(lambda (xin)
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(let [(x (vector-ref xin 1))]
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(number->string x))))
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(define ct-exact-truncate
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(lambda (x)
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(inexact->exact (truncate x))))
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(define ct-exact-truncate-boundedInt
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(lambda (x y)
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(ct-toSignedInt (exact-truncate x) y)))
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(define ct-exact-truncate-boundedUInt
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(lambda (x y)
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(ct-toUnsignedInt (exact-truncate x) y)))
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(define ct-int-double
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(lambda (xin)
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(let [(x (vector-ref xin 1))]
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(exact->inexact x))))
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