48e2ef5910
Rephrase comments that pointed at deleted Janet files (emit.janet, the seed
sources, 'the Janet back end punts ...') to present-tense descriptions of the
Chez behavior. Comment/docstring-only; the self-host fixpoint is unchanged
(comments don't affect the compiled seed).
Delete five files that were Janet-host shims with no Chez path: clojure.java.io
(provided natively by host/chez/io.ss), and jolt.{nrepl,png,interop,shell}
(the janet.* bridge, os/shell, janet.net — none exist on Chez).
jolt-cf1q.6
67 lines
3.3 KiB
Scheme
67 lines
3.3 KiB
Scheme
;; clojure.math (jolt-22vo) — Chez host shim over native flonum math.
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;;
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;; clojure.math is registered as native bindings (jolt-h79), NOT a .clj file — so
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;; there's no source tier to emit. Chez provides its own def-var! shims here, one per
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;; clojure.math fn, over Chez's native procedures. The analyzer knows the
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;; clojure.math ns exists, so a ref
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;; like clojure.math/sqrt lowers to a var-deref; these cells back it at runtime.
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;;
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;; jolt is all-flonum, so every result is a flonum (inputs arrive as flonums; Chez
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;; sqrt/sin/expt/... return flonums for flonum args). Semantics match
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;; Clojure 1.11 clojure.math: round = floor(x+0.5), rint = round-half-even,
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;; floor/ceil/floor-div return doubles, to-degrees/to-radians via PI.
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(define jolt-math-pi (acos -1.0))
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(define jolt-math-e (exp 1.0))
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(define (jolt-math-cbrt x)
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;; sign-aware so negative inputs stay real (expt of a negative flonum to a
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;; fractional power goes complex).
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(if (< x 0.0)
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(- (expt (- x) (/ 1.0 3.0)))
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(expt x (/ 1.0 3.0))))
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;; clojure.math/round returns a long (exact); floor/ceil/signum/rint return doubles.
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(define (jolt-math-round x) (exact (floor (+ x 0.5))))
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(define (jolt-math-signum x) (cond ((< x 0.0) -1.0) ((> x 0.0) 1.0) (else 0.0)))
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(define (jolt-math-to-degrees r) (/ (* r 180.0) jolt-math-pi))
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(define (jolt-math-to-radians d) (/ (* d jolt-math-pi) 180.0))
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(define (jolt-math-hypot a b) (sqrt (+ (* a a) (* b b))))
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(define (jolt-math-floor-div a b) (floor (/ a b)))
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(define (jolt-math-floor-mod a b) (- a (* b (floor (/ a b)))))
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;; clojure.math fns always return a DOUBLE; Chez's sqrt/expt/sin/floor/... return
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;; EXACT for exact args ((sqrt 9) -> 3, (sin 0) -> 0), so coerce.
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(define (m1 f) (lambda (x) (exact->inexact (f x))))
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(define (m2 f) (lambda (a b) (exact->inexact (f a b))))
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(def-var! "clojure.math" "sqrt" (m1 sqrt))
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(def-var! "clojure.math" "cbrt" jolt-math-cbrt)
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(def-var! "clojure.math" "pow" (m2 expt))
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(def-var! "clojure.math" "exp" (m1 exp))
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(def-var! "clojure.math" "expm1" (lambda (x) (- (exp x) 1.0)))
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(def-var! "clojure.math" "log" (m1 log))
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(def-var! "clojure.math" "log10" (lambda (x) (exact->inexact (log x 10.0))))
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(def-var! "clojure.math" "log1p" (lambda (x) (log (+ 1.0 x))))
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(def-var! "clojure.math" "sin" (m1 sin))
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(def-var! "clojure.math" "cos" (m1 cos))
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(def-var! "clojure.math" "tan" (m1 tan))
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(def-var! "clojure.math" "asin" (m1 asin))
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(def-var! "clojure.math" "acos" (m1 acos))
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(def-var! "clojure.math" "atan" (m1 atan))
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;; clojure.math/atan2 is atan2(y, x); Chez's 2-arg atan is (atan y x).
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(def-var! "clojure.math" "atan2" (lambda (y x) (exact->inexact (atan y x))))
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(def-var! "clojure.math" "sinh" (m1 sinh))
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(def-var! "clojure.math" "cosh" (m1 cosh))
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(def-var! "clojure.math" "tanh" (m1 tanh))
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(def-var! "clojure.math" "floor" (m1 floor))
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(def-var! "clojure.math" "ceil" (m1 ceiling))
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(def-var! "clojure.math" "rint" (m1 round))
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(def-var! "clojure.math" "round" jolt-math-round)
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(def-var! "clojure.math" "signum" jolt-math-signum)
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(def-var! "clojure.math" "to-degrees" jolt-math-to-degrees)
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(def-var! "clojure.math" "to-radians" jolt-math-to-radians)
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(def-var! "clojure.math" "hypot" jolt-math-hypot)
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(def-var! "clojure.math" "floor-div" jolt-math-floor-div)
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(def-var! "clojure.math" "floor-mod" jolt-math-floor-mod)
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(def-var! "clojure.math" "E" jolt-math-e)
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(def-var! "clojure.math" "PI" jolt-math-pi)
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