467ad75ff7
jolt was all-flonum (one :number type, inherited from Janet whose only number type is a double). The Chez runtime has a full numeric tower, so the zero-Janet path now carries it = JVM Clojure semantics: (/ 1 2) => 1/2 (exact Ratio, was 0.5) (integer? 3) => true (integer? 3.0) => false (float? 3.0) => true (ratio? (/ 1 2)) => true (= 3 3.0) => false (== 3 3.0) => true (+ 1 2) => 3 (exact) (/ 1.0 2) => 0.5 (double) jolt= was already exactness-aware (values.ss) and == is value-equality, so =/== match the JVM split. The reader preserves exactness (integer literals exact, a/b ratios exact rationals, decimals/exponents flonums); backend_scheme emit-const renders exact ints/ratios and flonums faithfully; the value-position arithmetic, count, int, compare, bit ops, parseLong, string .length/.indexOf, range, timestamps, and array bytes return exact integers (= JVM int/long) instead of coercing to flonum. double/parseDouble/clojure.math floor|ceil|signum stay double. Only the zero-Janet path carries the tower (the Janet reader loses exactness into a double before emit). The prelude/all-flonum path is unaffected for compiled code; the runtime reader is shared, so a couple of all-flonum reader assertions become value (==) assertions. ~16 numeric corpus cases now give the JVM tower value vs the Janet-era :expected and are allowlisted as tower divergences (Chez == reference JVM) pending the corpus flip to JVM (jolt-ecz0). No BigDecimal type (1M). Re-minted. zero-janet 2682 (floor 2698->2682, the reclassified tower cases), 0 new divergences; fixpoint 10/10, bootstrap 6/6, spine 35/35, cli 49/49; Janet gate 155 files 0 failed.
319 lines
18 KiB
Scheme
319 lines
18 KiB
Scheme
;; #inst values + a java.time formatting shim (jolt-at0a, inc X).
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;;
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;; A #inst literal lowers (analyzer :inst node -> emit) to (jolt-inst-from-string
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;; "…"); this file parses the RFC3339 string to epoch-ms and models the value as a
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;; `jinst` record (one flonum field, ms). Equality / map-key hashing are by the
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;; INSTANT (offset-normalized), matching the seed (types_ctx.janet parse-inst /
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;; inst->rfc3339). The overlay inst?/inst-ms read (get x :jolt/type)/(get x :ms),
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;; so jolt-get answers those off a jinst — the overlay fns then work unchanged.
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;;
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;; The java.time surface (DateTimeFormatter/Instant/ZoneId/LocalDateTime/
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;; FormatStyle/Locale + the .format/.atZone/.toInstant/… methods) is the Chez port
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;; of java_base.janet, registered through host-static.ss's class-statics / host-
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;; methods registries — so this loads LAST in rt.ss, after host-static.ss and io.ss.
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;; --- civil <-> days since the Unix epoch (Howard Hinnant's algorithms) -------
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;; No portable UTC mktime on Chez, so compute epoch days directly from y/m/d.
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(define (days-from-civil y m d)
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(let* ((y2 (if (<= m 2) (- y 1) y))
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(era (quotient (if (>= y2 0) y2 (- y2 399)) 400))
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(yoe (- y2 (* era 400)))
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(doy (+ (quotient (+ (* 153 (+ m (if (> m 2) -3 9))) 2) 5) (- d 1)))
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(doe (+ (* yoe 365) (quotient yoe 4) (- (quotient yoe 100)) doy)))
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(+ (* era 146097) doe -719468)))
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(define (civil-from-days z) ; -> (values year month day)
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(let* ((z2 (+ z 719468))
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(era (quotient (if (>= z2 0) z2 (- z2 146096)) 146097))
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(doe (- z2 (* era 146097)))
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(yoe (quotient (+ doe (- (quotient doe 1460)) (quotient doe 36524) (- (quotient doe 146096))) 365))
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(y (+ yoe (* era 400)))
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(doy (- doe (+ (* 365 yoe) (quotient yoe 4) (- (quotient yoe 100)))))
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(mp (quotient (+ (* 5 doy) 2) 153))
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(d (+ (- doy (quotient (+ (* 153 mp) 2) 5)) 1))
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(m (+ mp (if (< mp 10) 3 -9))))
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(values (if (<= m 2) (+ y 1) y) m d)))
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;; --- RFC3339 parse: yyyy[-MM[-dd[Thh[:mm[:ss[.fff]]]]]][Z|±hh:mm] -> ms -------
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(define-record-type jinst (fields ms) (nongenerative chez-jinst-v1))
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(define (digit? c) (and (char>=? c #\0) (char<=? c #\9)))
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(define (digits-at s i n) ; n digits from i -> integer, or #f
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(and (<= (+ i n) (string-length s))
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(let loop ((j i) (acc 0))
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(if (= j (+ i n))
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acc
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(and (digit? (string-ref s j))
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(loop (+ j 1) (+ (* acc 10) (- (char->integer (string-ref s j)) 48))))))))
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(define (jolt-inst-from-string ts)
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(define len (string-length ts))
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(define (fail) (error #f (string-append "Unrecognized #inst timestamp: " ts)))
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(let* ((year (or (digits-at ts 0 4) (fail)))
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(i 4) (month 1) (day 1) (hh 0) (mm 0) (ss 0) (frac-ms 0) (off-s 0))
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;; -MM
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(when (and (< i len) (char=? (string-ref ts i) #\-) (digits-at ts (+ i 1) 2))
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(set! month (digits-at ts (+ i 1) 2)) (set! i (+ i 3)))
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;; -dd
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(when (and (< i len) (char=? (string-ref ts i) #\-) (digits-at ts (+ i 1) 2))
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(set! day (digits-at ts (+ i 1) 2)) (set! i (+ i 3)))
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;; Thh
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(when (and (< i len) (or (char=? (string-ref ts i) #\T) (char=? (string-ref ts i) #\t))
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(digits-at ts (+ i 1) 2))
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(set! hh (digits-at ts (+ i 1) 2)) (set! i (+ i 3))
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;; :mm
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(when (and (< i len) (char=? (string-ref ts i) #\:) (digits-at ts (+ i 1) 2))
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(set! mm (digits-at ts (+ i 1) 2)) (set! i (+ i 3))
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;; :ss
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(when (and (< i len) (char=? (string-ref ts i) #\:) (digits-at ts (+ i 1) 2))
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(set! ss (digits-at ts (+ i 1) 2)) (set! i (+ i 3))
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;; .fff (truncate beyond 3)
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(when (and (< i len) (char=? (string-ref ts i) #\.))
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(let loop ((j (+ i 1)) (k 0) (acc 0))
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(if (and (< j len) (digit? (string-ref ts j)))
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(loop (+ j 1) (+ k 1) (if (< k 3) (+ (* acc 10) (- (char->integer (string-ref ts j)) 48)) acc))
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(begin
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(set! frac-ms (* acc (expt 10 (max 0 (- 3 k)))))
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(set! i j))))))))
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;; offset Z | ±hh:mm
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(when (< i len)
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(let ((c (string-ref ts i)))
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(cond
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((or (char=? c #\Z) (char=? c #\z)) (set! i (+ i 1)))
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((or (char=? c #\+) (char=? c #\-))
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(let ((oh (digits-at ts (+ i 1) 2)) (om (digits-at ts (+ i 4) 2)))
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(unless (and oh om (char=? (string-ref ts (+ i 3)) #\:)) (fail))
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(set! off-s (* (if (char=? c #\-) -1 1) (+ (* oh 3600) (* om 60))))
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(set! i (+ i 6))))
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(else (fail)))))
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(unless (= i len) (fail))
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(let ((base-s (+ (* (days-from-civil year month day) 86400) (* hh 3600) (* mm 60) ss)))
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(make-jinst (- (+ (* base-s 1000) frac-ms) (* off-s 1000))))))
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;; --- canonical print form: yyyy-MM-ddThh:mm:ss.fff-00:00 (UTC) ---------------
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(define (pad2 n) (if (< n 10) (string-append "0" (number->string n)) (number->string n)))
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(define (pad4 n) (let ((s (number->string n))) (string-append (make-string (max 0 (- 4 (string-length s))) #\0) s)))
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(define (pad3 n) (let ((s (number->string n))) (string-append (make-string (max 0 (- 3 (string-length s))) #\0) s)))
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(define (floor-div a b) (let ((q (quotient a b)) (r (remainder a b))) (if (and (not (= r 0)) (< (* a b) 0)) (- q 1) q)))
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(define (floor-mod a b) (- a (* (floor-div a b) b)))
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(define (inst-fields ms) ; -> list (y mo d hh mm ss frac dow)
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(let* ((total-s (floor-div (exact (truncate ms)) 1000))
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(frac (- (exact (truncate ms)) (* total-s 1000)))
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(days (floor-div total-s 86400))
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(sod (floor-mod total-s 86400))
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(hh (quotient sod 3600)) (mm (quotient (remainder sod 3600) 60)) (ss (remainder sod 60))
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(dow (floor-mod (+ days 4) 7))) ; 1970-01-01 = Thursday; 0=Sunday
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(call-with-values (lambda () (civil-from-days days))
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(lambda (y mo d) (list y mo d hh mm ss frac dow)))))
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(define (inst-rfc3339 inst)
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(let ((f (inst-fields (jinst-ms inst))))
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(string-append (pad4 (list-ref f 0)) "-" (pad2 (list-ref f 1)) "-" (pad2 (list-ref f 2))
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"T" (pad2 (list-ref f 3)) ":" (pad2 (list-ref f 4)) ":" (pad2 (list-ref f 5))
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"." (pad3 (list-ref f 6)) "-00:00")))
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;; --- DateTimeFormatter pattern engine (port of java_base.janet format-ms) -----
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(define month-names (vector "January" "February" "March" "April" "May" "June" "July"
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"August" "September" "October" "November" "December"))
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(define day-names (vector "Sunday" "Monday" "Tuesday" "Wednesday" "Thursday" "Friday" "Saturday"))
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(define (format-ms pattern ms)
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(let ((f (inst-fields ms)) (n (string-length pattern)) (out (open-output-string)))
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(let ((y (list-ref f 0)) (mo (list-ref f 1)) (d (list-ref f 2))
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(hh (list-ref f 3)) (mi (list-ref f 4)) (se (list-ref f 5)) (dow (list-ref f 7)))
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(define (run-len i c) (let loop ((j i)) (if (and (< j n) (char=? (string-ref pattern j) c)) (loop (+ j 1)) (- j i))))
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(let loop ((i 0))
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(when (< i n)
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(let* ((c (string-ref pattern i)) (k (run-len i c)))
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(cond
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((char=? c #\')
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(if (and (< (+ i 1) n) (char=? (string-ref pattern (+ i 1)) #\'))
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(begin (write-char #\' out) (loop (+ i 2)))
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(let close ((j (+ i 1)))
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(cond ((>= j n) (loop j))
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((char=? (string-ref pattern j) #\') (loop (+ j 1)))
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(else (write-char (string-ref pattern j) out) (close (+ j 1)))))))
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((char=? c #\y) (display (if (>= k 4) (number->string y) (pad2 (modulo y 100))) out) (loop (+ i k)))
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((char=? c #\M)
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(display (cond ((= k 1) (number->string mo)) ((= k 2) (pad2 mo))
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((= k 3) (substring (vector-ref month-names (- mo 1)) 0 3))
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(else (vector-ref month-names (- mo 1)))) out)
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(loop (+ i k)))
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((char=? c #\d) (display (if (= k 1) (number->string d) (pad2 d)) out) (loop (+ i k)))
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((char=? c #\E)
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(display (if (>= k 4) (vector-ref day-names dow) (substring (vector-ref day-names dow) 0 3)) out)
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(loop (+ i k)))
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((char=? c #\H) (display (if (= k 1) (number->string hh) (pad2 hh)) out) (loop (+ i k)))
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((char=? c #\h)
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(let ((h12 (let ((h (modulo hh 12))) (if (= h 0) 12 h))))
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(display (if (= k 1) (number->string h12) (pad2 h12)) out)) (loop (+ i k)))
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((char=? c #\m) (display (if (= k 1) (number->string mi) (pad2 mi)) out) (loop (+ i k)))
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((char=? c #\s) (display (if (= k 1) (number->string se) (pad2 se)) out) (loop (+ i k)))
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((char=? c #\a) (display (if (< hh 12) "AM" "PM") out) (loop (+ i k)))
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(else (write-char c out) (loop (+ i 1)))))))
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(get-output-string out))))
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;; --- value integration: get / = / hash / pr / type / instance? --------------
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(define kw-jolt-type (keyword "jolt" "type"))
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(define kw-ms (keyword #f "ms"))
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(define inst-type-kw (keyword "jolt" "inst"))
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(define %it-get jolt-get)
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(set! jolt-get (case-lambda
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((coll k) (jolt-get coll k jolt-nil))
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((coll k d) (if (jinst? coll)
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(cond ((jolt=2 k kw-jolt-type) inst-type-kw)
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((jolt=2 k kw-ms) (jinst-ms coll))
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(else d))
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(%it-get coll k d)))))
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(define %it-=2 jolt=2)
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(set! jolt=2 (lambda (a b)
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(cond ((jinst? a) (and (jinst? b) (= (jinst-ms a) (jinst-ms b))))
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((jinst? b) #f)
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(else (%it-=2 a b)))))
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(define %it-hash jolt-hash)
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(set! jolt-hash (lambda (x) (if (jinst? x) (jolt-hash (jinst-ms x)) (%it-hash x))))
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(define (inst-pr i) (string-append "#inst \"" (inst-rfc3339 i) "\""))
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(define %it-pr-str jolt-pr-str)
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(set! jolt-pr-str (lambda (x) (if (jinst? x) (inst-pr x) (%it-pr-str x))))
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(define %it-pr-readable jolt-pr-readable)
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(set! jolt-pr-readable (lambda (x) (if (jinst? x) (inst-pr x) (%it-pr-readable x))))
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(define %it-str-render jolt-str-render-one)
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(set! jolt-str-render-one (lambda (x) (if (jinst? x) (inst-rfc3339 x) (%it-str-render x))))
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(define %it-type jolt-type)
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(set! jolt-type (lambda (x) (if (jinst? x) inst-type-kw (%it-type x))))
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(def-var! "clojure.core" "type" jolt-type)
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;; instance? java.util.Date -> a jinst; java.time.Instant/LocalDateTime -> the
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;; matching jhost tag. The instance? macro passes the class-name symbol.
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(define (class-short tn) (let loop ((i (- (string-length tn) 1)))
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(cond ((< i 0) tn) ((char=? (string-ref tn i) #\.) (substring tn (+ i 1) (string-length tn))) (else (loop (- i 1))))))
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(define %it-instance-check instance-check)
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(set! instance-check
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(lambda (type-sym val)
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(let ((tn (class-short (symbol-t-name type-sym))))
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(cond
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;; a #inst / (Date.) is a java.util.Date; it is NOT a java.sql.Timestamp
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;; (on the JVM a Date is not a Timestamp), so answer Timestamp explicitly #f.
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((jinst? val) (cond ((string=? tn "Date") #t)
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((string=? tn "Timestamp") #f)
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(else (%it-instance-check type-sym val))))
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((and (jhost? val) (string=? (jhost-tag val) "instant")) (if (string=? tn "Instant") #t (%it-instance-check type-sym val)))
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((and (jhost? val) (string=? (jhost-tag val) "local-dt")) (if (string=? tn "LocalDateTime") #t (%it-instance-check type-sym val)))
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(else (%it-instance-check type-sym val))))))
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(def-var! "clojure.core" "instance-check" instance-check)
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;; inst-ms* is a seed native (the overlay inst-ms reads (get x :ms), now answered).
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(def-var! "clojure.core" "inst-ms*" (lambda (i) (jinst-ms i)))
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;; --- java.time shim values (jhost objects over host-static.ss registries) -----
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(define (ms-of d)
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(cond ((number? d) d)
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((jinst? d) (jinst-ms d))
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((and (jhost? d) (member (jhost-tag d) '("instant" "zoned-dt" "local-dt")))
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(vector-ref (jhost-state d) 0))
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(else (error #f "not a date value" d))))
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(define (mk-instant ms) (make-jhost "instant" (vector ms)))
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(define (mk-zoned ms) (make-jhost "zoned-dt" (vector ms)))
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(define (mk-local ms) (make-jhost "local-dt" (vector ms)))
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(define (mk-formatter pat) (make-jhost "dt-formatter" (vector pat)))
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(define (fmt-pat f) (vector-ref (jhost-state f) 0))
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(define (now-ms) (now-millis)) ; exact ms (= JVM long); now-millis from host-static.ss
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;; coerce a user-supplied ms (exact or flonum) to an exact integer for storage.
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(define (ms->exact ms) (exact (round ms)))
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(register-host-methods! "instant"
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(list (cons "atZone" (lambda (self zone) (mk-zoned (ms-of self))))
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(cons "toEpochMilli" (lambda (self) (ms-of self)))
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(cons "toString" (lambda (self) (inst-rfc3339 (make-jinst (ms-of self)))))))
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(register-host-methods! "zoned-dt"
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(list (cons "toLocalDateTime" (lambda (self) (mk-local (ms-of self))))
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(cons "toInstant" (lambda (self) (mk-instant (ms-of self))))))
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(register-host-methods! "local-dt"
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(list (cons "atZone" (lambda (self zone) (mk-zoned (ms-of self))))))
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(register-host-methods! "dt-formatter"
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(list (cons "withLocale" (lambda (self locale) (mk-formatter (fmt-pat self))))
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(cons "format" (lambda (self d) (format-ms (fmt-pat self) (ms-of d))))))
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;; FormatStyle approximations (no locale DB on this host).
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(define style-patterns
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'((date . ((short . "M/d/yy") (medium . "MMM d, yyyy") (long . "MMMM d, yyyy") (full . "EEEE, MMMM d, yyyy")))
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(time . ((short . "h:mm a") (medium . "h:mm:ss a") (long . "h:mm:ss a") (full . "h:mm:ss a")))
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(datetime . ((short . "M/d/yy, h:mm a") (medium . "MMM d, yyyy, h:mm:ss a")
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(long . "MMMM d, yyyy, h:mm:ss a") (full . "EEEE, MMMM d, yyyy, h:mm:ss a")))))
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(define (style-of fs) (vector-ref (jhost-state fs) 0)) ; a symbol: short/medium/long/full
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(define (style-fmt kind fs)
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(mk-formatter (or (let ((row (assq kind style-patterns))) (and row (let ((e (assq (style-of fs) (cdr row)))) (and e (cdr e)))))
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"yyyy-MM-dd HH:mm:ss")))
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(register-class-statics! "FormatStyle"
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(list (cons "SHORT" (make-jhost "format-style" (vector 'short)))
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(cons "MEDIUM" (make-jhost "format-style" (vector 'medium)))
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(cons "LONG" (make-jhost "format-style" (vector 'long)))
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(cons "FULL" (make-jhost "format-style" (vector 'full)))))
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(register-class-statics! "DateTimeFormatter"
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(list (cons "ofPattern" (lambda (p . _) (mk-formatter p)))
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(cons "ISO_LOCAL_DATE" (mk-formatter "yyyy-MM-dd"))
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(cons "ISO_LOCAL_DATE_TIME" (mk-formatter "yyyy-MM-dd'T'HH:mm:ss"))
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(cons "ofLocalizedDate" (lambda (fs) (style-fmt 'date fs)))
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(cons "ofLocalizedTime" (lambda (fs) (style-fmt 'time fs)))
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(cons "ofLocalizedDateTime" (lambda (fs) (style-fmt 'datetime fs)))))
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(register-class-statics! "Instant"
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(list (cons "ofEpochMilli" (lambda (ms) (mk-instant (ms->exact ms))))
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(cons "now" (lambda () (mk-instant (now-ms))))))
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(register-class-statics! "ZoneId"
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(list (cons "systemDefault" (lambda () (make-jhost "zone-id" (vector "system"))))
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(cons "of" (lambda (id) (make-jhost "zone-id" (vector id))))))
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(register-class-statics! "LocalDateTime"
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(list (cons "ofInstant" (lambda (inst zone) (mk-local (ms-of inst))))
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(cons "now" (lambda () (mk-local (now-ms))))))
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(let ((locale-ctor (lambda (id . _) (make-jhost "locale" (vector (if (string? id) id (jolt-str-render-one id)))))))
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(register-class-ctor! "Locale" locale-ctor)
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(register-class-ctor! "java.util.Locale" locale-ctor))
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(register-class-statics! "Locale"
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(list (cons "getDefault" (lambda () (make-jhost "locale" (vector "default"))))
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(cons "ENGLISH" (make-jhost "locale" (vector "en")))
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(cons "US" (make-jhost "locale" (vector "en-US")))
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(cons "ROOT" (make-jhost "locale" (vector "root")))))
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;; java.util.Date / java.sql.Timestamp: #inst's classes. (Date.) = now, (Date. ms)
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;; or (Date. another-date) -> a jinst (ms-of accepts a number / jinst / instant), so
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;; .getTime / inst? / instance? Date|Timestamp work. (jolt-dcmm)
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(define (date-ctor . args)
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(make-jinst (if (null? args) (now-ms) (ms->exact (ms-of (car args))))))
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(register-class-ctor! "Date" date-ctor)
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(register-class-ctor! "java.util.Date" date-ctor)
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(register-class-ctor! "Timestamp" date-ctor)
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(register-class-ctor! "java.sql.Timestamp" date-ctor)
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;; java.util.TimeZone: an opaque id holder (format-ms is UTC, so a non-UTC zone is
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;; not honored — only the UTC case the corpus uses is exercised).
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(define (timezone-of id) (make-jhost "timezone" (vector (if (string? id) id (jolt-str-render-one id)))))
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(register-class-statics! "TimeZone" (list (cons "getTimeZone" timezone-of)))
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(register-class-statics! "java.util.TimeZone" (list (cons "getTimeZone" timezone-of)))
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;; java.text.SimpleDateFormat: holds a pattern; .setTimeZone is accepted (format-ms
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;; is UTC); .format(date) renders the date per the pattern via the format-ms engine.
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(define (sdf-ctor pat . _) (make-jhost "sdf" (vector (if (string? pat) pat (jolt-str-render-one pat)))))
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(register-class-ctor! "SimpleDateFormat" sdf-ctor)
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(register-class-ctor! "java.text.SimpleDateFormat" sdf-ctor)
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(register-host-methods! "sdf"
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(list (cons "setTimeZone" (lambda (self tz) jolt-nil))
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(cons "format" (lambda (self d) (format-ms (vector-ref (jhost-state self) 0) (ms-of d))))))
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;; a jinst's java.util.Date method surface (record-method-dispatch arm).
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(define %it-rmd record-method-dispatch)
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(set! record-method-dispatch
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(lambda (obj method-name rest-args)
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(cond
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((jinst? obj)
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(cond ((string=? method-name "getTime") (jinst-ms obj))
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((string=? method-name "toInstant") (mk-instant (jinst-ms obj)))
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((string=? method-name "toString") (inst-rfc3339 obj))
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(else (error #f (string-append "No method " method-name " on Date")))))
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(else (%it-rmd obj method-name rest-args)))))
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