;;; srfi-19.scm --- Time/Date Library
-;; Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+;; Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
;;
;; This library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public
;;
;; FIXME: mkoeppe: Time zones are treated a little simplistic in
;; SRFI-19; they are only a numeric offset. Thus, printing time zones
-;; (PRIV:LOCALE-PRINT-TIME-ZONE) can't be implemented sensibly. The
+;; (LOCALE-PRINT-TIME-ZONE) can't be implemented sensibly. The
;; functions taking an optional TZ-OFFSET should be extended to take a
;; symbolic time-zone (like "CET"); this string should be stored in
;; the DATE structure.
;;-- LOCALE dependent constants
-(define priv:locale-number-separator locale-decimal-point)
-(define priv:locale-pm locale-pm-string)
-(define priv:locale-am locale-am-string)
-
;; See date->string
-(define priv:locale-date-time-format "~a ~b ~d ~H:~M:~S~z ~Y")
-(define priv:locale-short-date-format "~m/~d/~y")
-(define priv:locale-time-format "~H:~M:~S")
-(define priv:iso-8601-date-time-format "~Y-~m-~dT~H:~M:~S~z")
+(define locale-date-time-format "~a ~b ~d ~H:~M:~S~z ~Y")
+(define locale-short-date-format "~m/~d/~y")
+(define locale-time-format "~H:~M:~S")
+(define iso-8601-date-time-format "~Y-~m-~dT~H:~M:~S~z")
;;-- Miscellaneous Constants.
-;;-- only the priv:tai-epoch-in-jd might need changing if
+;;-- only the tai-epoch-in-jd might need changing if
;; a different epoch is used.
-(define priv:nano 1000000000) ; nanoseconds in a second
-(define priv:sid 86400) ; seconds in a day
-(define priv:sihd 43200) ; seconds in a half day
-(define priv:tai-epoch-in-jd 4881175/2) ; julian day number for 'the epoch'
+(define nano 1000000000) ; nanoseconds in a second
+(define sid 86400) ; seconds in a day
+(define sihd 43200) ; seconds in a half day
+(define tai-epoch-in-jd 4881175/2) ; julian day number for 'the epoch'
;; FIXME: should this be something other than misc-error?
-(define (priv:time-error caller type value)
+(define (time-error caller type value)
(if value
(throw 'misc-error caller "TIME-ERROR type ~A: ~S" (list type value) #f)
(throw 'misc-error caller "TIME-ERROR type ~A" (list type) #f)))
;; format and creates the leap second table
;; it also calls the almost standard, but not R5 procedures read-line
;; & open-input-string
-;; ie (set! priv:leap-second-table (priv:read-tai-utc-date "tai-utc.dat"))
+;; ie (set! leap-second-table (read-tai-utc-date "tai-utc.dat"))
-(define (priv:read-tai-utc-data filename)
+(define (read-tai-utc-data filename)
(define (convert-jd jd)
- (* (- (inexact->exact jd) priv:tai-epoch-in-jd) priv:sid))
+ (* (- (inexact->exact jd) tai-epoch-in-jd) sid))
(define (convert-sec sec)
(inexact->exact sec))
(let ((port (open-input-file filename))
;; each entry is (tai seconds since epoch . # seconds to subtract for utc)
;; note they go higher to lower, and end in 1972.
-(define priv:leap-second-table
+(define leap-second-table
'((1136073600 . 33)
(915148800 . 32)
(867715200 . 31)
(63072000 . 10)))
(define (read-leap-second-table filename)
- (set! priv:leap-second-table (priv:read-tai-utc-data filename)))
+ (set! leap-second-table (read-tai-utc-data filename)))
-(define (priv:leap-second-delta utc-seconds)
+(define (leap-second-delta utc-seconds)
(letrec ((lsd (lambda (table)
(cond ((>= utc-seconds (caar table))
(cdar table))
(else (lsd (cdr table)))))))
- (if (< utc-seconds (* (- 1972 1970) 365 priv:sid)) 0
- (lsd priv:leap-second-table))))
+ (if (< utc-seconds (* (- 1972 1970) 365 sid)) 0
+ (lsd leap-second-table))))
;;; the TIME structure; creates the accessors, too.
(define (copy-time time)
(make-time (time-type time) (time-nanosecond time) (time-second time)))
-(define (priv:split-real r)
+(define (split-real r)
(if (integer? r)
(values (inexact->exact r) 0)
(let ((l (truncate r)))
(values (inexact->exact l) (- r l)))))
-(define (priv:time-normalize! t)
+(define (time-normalize! t)
(if (>= (abs (time-nanosecond t)) 1000000000)
(receive (int frac)
- (priv:split-real (time-nanosecond t))
+ (split-real (time-nanosecond t))
(set-time-second! t (+ (time-second t)
(quotient int 1000000000)))
(set-time-nanosecond! t (+ (remainder int 1000000000)
t)
(define (make-time type nanosecond second)
- (priv:time-normalize! (make-time-unnormalized type nanosecond second)))
+ (time-normalize! (make-time-unnormalized type nanosecond second)))
;; Helpers
;; FIXME: finish this and publish it?
;;; specific time getters.
-(define (priv:current-time-utc)
+(define (current-time-utc)
;; Resolution is microseconds.
(let ((tod (gettimeofday)))
(make-time time-utc (* (cdr tod) 1000) (car tod))))
-(define (priv:current-time-tai)
+(define (current-time-tai)
;; Resolution is microseconds.
(let* ((tod (gettimeofday))
(sec (car tod))
(usec (cdr tod)))
(make-time time-tai
(* usec 1000)
- (+ (car tod) (priv:leap-second-delta sec)))))
+ (+ (car tod) (leap-second-delta sec)))))
-;;(define (priv:current-time-ms-time time-type proc)
+;;(define (current-time-ms-time time-type proc)
;; (let ((current-ms (proc)))
;; (make-time time-type
;; (quotient current-ms 10000)
;; will require rewriting all of the time-monotonic converters,
;; of course.
-(define (priv:current-time-monotonic)
+(define (current-time-monotonic)
;; Resolution is microseconds.
- (priv:current-time-tai))
+ (current-time-tai))
-(define (priv:current-time-thread)
- (priv:time-error 'current-time 'unsupported-clock-type 'time-thread))
+(define (current-time-thread)
+ (time-error 'current-time 'unsupported-clock-type 'time-thread))
-(define priv:ns-per-guile-tick (/ 1000000000 internal-time-units-per-second))
+(define ns-per-guile-tick (/ 1000000000 internal-time-units-per-second))
-(define (priv:current-time-process)
+(define (current-time-process)
(let ((run-time (get-internal-run-time)))
(make-time
time-process
(* (remainder run-time internal-time-units-per-second)
- priv:ns-per-guile-tick)
+ ns-per-guile-tick)
(quotient run-time internal-time-units-per-second))))
-;;(define (priv:current-time-gc)
-;; (priv:current-time-ms-time time-gc current-gc-milliseconds))
+;;(define (current-time-gc)
+;; (current-time-ms-time time-gc current-gc-milliseconds))
(define (current-time . clock-type)
(let ((clock-type (if (null? clock-type) time-utc (car clock-type))))
(cond
- ((eq? clock-type time-tai) (priv:current-time-tai))
- ((eq? clock-type time-utc) (priv:current-time-utc))
- ((eq? clock-type time-monotonic) (priv:current-time-monotonic))
- ((eq? clock-type time-thread) (priv:current-time-thread))
- ((eq? clock-type time-process) (priv:current-time-process))
- ;; ((eq? clock-type time-gc) (priv:current-time-gc))
- (else (priv:time-error 'current-time 'invalid-clock-type clock-type)))))
+ ((eq? clock-type time-tai) (current-time-tai))
+ ((eq? clock-type time-utc) (current-time-utc))
+ ((eq? clock-type time-monotonic) (current-time-monotonic))
+ ((eq? clock-type time-thread) (current-time-thread))
+ ((eq? clock-type time-process) (current-time-process))
+ ;; ((eq? clock-type time-gc) (current-time-gc))
+ (else (time-error 'current-time 'invalid-clock-type clock-type)))))
;; -- Time Resolution
;; This is the resolution of the clock in nanoseconds.
((time-tai) 1000)
((time-utc) 1000)
((time-monotonic) 1000)
- ((time-process) priv:ns-per-guile-tick)
+ ((time-process) ns-per-guile-tick)
;; ((eq? clock-type time-thread) 1000)
;; ((eq? clock-type time-gc) 10000)
- (else (priv:time-error 'time-resolution 'invalid-clock-type clock-type)))))
+ (else (time-error 'time-resolution 'invalid-clock-type clock-type)))))
;; -- Time comparisons
(set-time-type! time1 time-duration)
(set-time-second! time1 sec-diff)
(set-time-nanosecond! time1 nsec-diff)
- (priv:time-normalize! time1)))
+ (time-normalize! time1)))
(define (time-difference time1 time2)
(let ((result (copy-time time1)))
(define (add-duration! t duration)
(if (not (eq? (time-type duration) time-duration))
- (priv:time-error 'add-duration 'not-duration duration)
+ (time-error 'add-duration 'not-duration duration)
(let ((sec-plus (+ (time-second t) (time-second duration)))
(nsec-plus (+ (time-nanosecond t) (time-nanosecond duration))))
(set-time-second! t sec-plus)
(set-time-nanosecond! t nsec-plus)
- (priv:time-normalize! t))))
+ (time-normalize! t))))
(define (add-duration t duration)
(let ((result (copy-time t)))
(define (subtract-duration! t duration)
(if (not (eq? (time-type duration) time-duration))
- (priv:time-error 'add-duration 'not-duration duration)
+ (time-error 'add-duration 'not-duration duration)
(let ((sec-minus (- (time-second t) (time-second duration)))
(nsec-minus (- (time-nanosecond t) (time-nanosecond duration))))
(set-time-second! t sec-minus)
(set-time-nanosecond! t nsec-minus)
- (priv:time-normalize! t))))
+ (time-normalize! t))))
(define (subtract-duration time1 duration)
(let ((result (copy-time time1)))
(define (priv:time-tai->time-utc! time-in time-out caller)
(if (not (eq? (time-type time-in) time-tai))
- (priv:time-error caller 'incompatible-time-types time-in))
+ (time-error caller 'incompatible-time-types time-in))
(set-time-type! time-out time-utc)
(set-time-nanosecond! time-out (time-nanosecond time-in))
(set-time-second! time-out (- (time-second time-in)
- (priv:leap-second-delta
+ (leap-second-delta
(time-second time-in))))
time-out)
(define (priv:time-utc->time-tai! time-in time-out caller)
(if (not (eq? (time-type time-in) time-utc))
- (priv:time-error caller 'incompatible-time-types time-in))
+ (time-error caller 'incompatible-time-types time-in))
(set-time-type! time-out time-tai)
(set-time-nanosecond! time-out (time-nanosecond time-in))
(set-time-second! time-out (+ (time-second time-in)
- (priv:leap-second-delta
+ (leap-second-delta
(time-second time-in))))
time-out)
;; -- these depend on time-monotonic having the same definition as time-tai!
(define (time-monotonic->time-utc time-in)
(if (not (eq? (time-type time-in) time-monotonic))
- (priv:time-error 'time-monotonic->time-utc
+ (time-error 'time-monotonic->time-utc
'incompatible-time-types time-in))
(let ((ntime (copy-time time-in)))
(set-time-type! ntime time-tai)
(define (time-monotonic->time-utc! time-in)
(if (not (eq? (time-type time-in) time-monotonic))
- (priv:time-error 'time-monotonic->time-utc!
+ (time-error 'time-monotonic->time-utc!
'incompatible-time-types time-in))
(set-time-type! time-in time-tai)
(priv:time-tai->time-utc! time-in time-in 'time-monotonic->time-utc))
(define (time-monotonic->time-tai time-in)
(if (not (eq? (time-type time-in) time-monotonic))
- (priv:time-error 'time-monotonic->time-tai
+ (time-error 'time-monotonic->time-tai
'incompatible-time-types time-in))
(let ((ntime (copy-time time-in)))
(set-time-type! ntime time-tai)
(define (time-monotonic->time-tai! time-in)
(if (not (eq? (time-type time-in) time-monotonic))
- (priv:time-error 'time-monotonic->time-tai!
+ (time-error 'time-monotonic->time-tai!
'incompatible-time-types time-in))
(set-time-type! time-in time-tai)
time-in)
(define (time-utc->time-monotonic time-in)
(if (not (eq? (time-type time-in) time-utc))
- (priv:time-error 'time-utc->time-monotonic
+ (time-error 'time-utc->time-monotonic
'incompatible-time-types time-in))
(let ((ntime (priv:time-utc->time-tai! time-in (make-time-unnormalized #f #f #f)
'time-utc->time-monotonic)))
(define (time-utc->time-monotonic! time-in)
(if (not (eq? (time-type time-in) time-utc))
- (priv:time-error 'time-utc->time-monotonic!
+ (time-error 'time-utc->time-monotonic!
'incompatible-time-types time-in))
(let ((ntime (priv:time-utc->time-tai! time-in time-in
'time-utc->time-monotonic!)))
(define (time-tai->time-monotonic time-in)
(if (not (eq? (time-type time-in) time-tai))
- (priv:time-error 'time-tai->time-monotonic
+ (time-error 'time-tai->time-monotonic
'incompatible-time-types time-in))
(let ((ntime (copy-time time-in)))
(set-time-type! ntime time-monotonic)
(define (time-tai->time-monotonic! time-in)
(if (not (eq? (time-type time-in) time-tai))
- (priv:time-error 'time-tai->time-monotonic!
+ (time-error 'time-tai->time-monotonic!
'incompatible-time-types time-in))
(set-time-type! time-in time-monotonic)
time-in)
(zone-offset date-zone-offset set-date-zone-offset!))
;; gives the julian day which starts at noon.
-(define (priv:encode-julian-day-number day month year)
+(define (encode-julian-day-number day month year)
(let* ((a (quotient (- 14 month) 12))
(y (- (+ year 4800) a (if (negative? year) -1 0)))
(m (- (+ month (* 12 a)) 3)))
-32045)))
;; gives the seconds/date/month/year
-(define (priv:decode-julian-day-number jdn)
+(define (decode-julian-day-number jdn)
(let* ((days (inexact->exact (truncate jdn)))
(a (+ days 32044))
(b (quotient (+ (* 4 a) 3) 146097))
(m (quotient (+ (* 5 e) 2) 153))
(y (+ (* 100 b) d -4800 (quotient m 10))))
(values ; seconds date month year
- (* (- jdn days) priv:sid)
+ (* (- jdn days) sid)
(+ e (- (quotient (+ (* 153 m) 2) 5)) 1)
(+ m 3 (* -12 (quotient m 10)))
(if (>= 0 y) (- y 1) y))))
;; differently from MzScheme's....
;; This should be written to be OS specific.
-(define (priv:local-tz-offset utc-time)
+(define (local-tz-offset utc-time)
;; SRFI uses seconds West, but guile (and libc) use seconds East.
(- (tm:gmtoff (localtime (time-second utc-time)))))
;; special thing -- ignores nanos
-(define (priv:time->julian-day-number seconds tz-offset)
- (+ (/ (+ seconds tz-offset priv:sihd)
- priv:sid)
- priv:tai-epoch-in-jd))
+(define (time->julian-day-number seconds tz-offset)
+ (+ (/ (+ seconds tz-offset sihd)
+ sid)
+ tai-epoch-in-jd))
-(define (priv:leap-second? second)
- (and (assoc second priv:leap-second-table) #t))
+(define (leap-second? second)
+ (and (assoc second leap-second-table) #t))
(define (time-utc->date time . tz-offset)
(if (not (eq? (time-type time) time-utc))
- (priv:time-error 'time->date 'incompatible-time-types time))
+ (time-error 'time->date 'incompatible-time-types time))
(let* ((offset (if (null? tz-offset)
- (priv:local-tz-offset time)
+ (local-tz-offset time)
(car tz-offset)))
- (leap-second? (priv:leap-second? (+ offset (time-second time))))
- (jdn (priv:time->julian-day-number (if leap-second?
+ (leap-second? (leap-second? (+ offset (time-second time))))
+ (jdn (time->julian-day-number (if leap-second?
(- (time-second time) 1)
(time-second time))
offset)))
- (call-with-values (lambda () (priv:decode-julian-day-number jdn))
+ (call-with-values (lambda () (decode-julian-day-number jdn))
(lambda (secs date month year)
;; secs is a real because jdn is a real in Guile;
;; but it is conceptionally an integer.
(define (time-tai->date time . tz-offset)
(if (not (eq? (time-type time) time-tai))
- (priv:time-error 'time->date 'incompatible-time-types time))
+ (time-error 'time->date 'incompatible-time-types time))
(let* ((offset (if (null? tz-offset)
- (priv:local-tz-offset (time-tai->time-utc time))
+ (local-tz-offset (time-tai->time-utc time))
(car tz-offset)))
(seconds (- (time-second time)
- (priv:leap-second-delta (time-second time))))
- (leap-second? (priv:leap-second? (+ offset seconds)))
- (jdn (priv:time->julian-day-number (if leap-second?
+ (leap-second-delta (time-second time))))
+ (leap-second? (leap-second? (+ offset seconds)))
+ (jdn (time->julian-day-number (if leap-second?
(- seconds 1)
seconds)
offset)))
- (call-with-values (lambda () (priv:decode-julian-day-number jdn))
+ (call-with-values (lambda () (decode-julian-day-number jdn))
(lambda (secs date month year)
;; secs is a real because jdn is a real in Guile;
;; but it is conceptionally an integer.
;; this is the same as time-tai->date.
(define (time-monotonic->date time . tz-offset)
(if (not (eq? (time-type time) time-monotonic))
- (priv:time-error 'time->date 'incompatible-time-types time))
+ (time-error 'time->date 'incompatible-time-types time))
(let* ((offset (if (null? tz-offset)
- (priv:local-tz-offset (time-monotonic->time-utc time))
+ (local-tz-offset (time-monotonic->time-utc time))
(car tz-offset)))
(seconds (- (time-second time)
- (priv:leap-second-delta (time-second time))))
- (leap-second? (priv:leap-second? (+ offset seconds)))
- (jdn (priv:time->julian-day-number (if leap-second?
+ (leap-second-delta (time-second time))))
+ (leap-second? (leap-second? (+ offset seconds)))
+ (jdn (time->julian-day-number (if leap-second?
(- seconds 1)
seconds)
offset)))
- (call-with-values (lambda () (priv:decode-julian-day-number jdn))
+ (call-with-values (lambda () (decode-julian-day-number jdn))
(lambda (secs date month year)
;; secs is a real because jdn is a real in Guile;
;; but it is conceptionally an integer.
offset))))))
(define (date->time-utc date)
- (let* ((jdays (- (priv:encode-julian-day-number (date-day date)
+ (let* ((jdays (- (encode-julian-day-number (date-day date)
(date-month date)
(date-year date))
- priv:tai-epoch-in-jd))
+ tai-epoch-in-jd))
;; jdays is an integer plus 1/2,
(jdays-1/2 (inexact->exact (- jdays 1/2))))
(make-time
(define (date->time-monotonic date)
(time-utc->time-monotonic! (date->time-utc date)))
-(define (priv:leap-year? year)
+(define (leap-year? year)
(or (= (modulo year 400) 0)
(and (= (modulo year 4) 0) (not (= (modulo year 100) 0)))))
;; Map 1-based month number M to number of days in the year before the
;; start of month M (in a non-leap year).
-(define priv:month-assoc '((1 . 0) (2 . 31) (3 . 59) (4 . 90)
+(define month-assoc '((1 . 0) (2 . 31) (3 . 59) (4 . 90)
(5 . 120) (6 . 151) (7 . 181) (8 . 212)
(9 . 243) (10 . 273) (11 . 304) (12 . 334)))
-(define (priv:year-day day month year)
- (let ((days-pr (assoc month priv:month-assoc)))
+(define (year-day day month year)
+ (let ((days-pr (assoc month month-assoc)))
(if (not days-pr)
- (priv:time-error 'date-year-day 'invalid-month-specification month))
- (if (and (priv:leap-year? year) (> month 2))
+ (time-error 'date-year-day 'invalid-month-specification month))
+ (if (and (leap-year? year) (> month 2))
(+ day (cdr days-pr) 1)
(+ day (cdr days-pr)))))
(define (date-year-day date)
- (priv:year-day (date-day date) (date-month date) (date-year date)))
+ (year-day (date-day date) (date-month date) (date-year date)))
;; from calendar faq
-(define (priv:week-day day month year)
+(define (week-day day month year)
(let* ((a (quotient (- 14 month) 12))
(y (- year a))
(m (+ month (* 12 a) -2)))
7)))
(define (date-week-day date)
- (priv:week-day (date-day date) (date-month date) (date-year date)))
+ (week-day (date-day date) (date-month date) (date-year date)))
-(define (priv:days-before-first-week date day-of-week-starting-week)
+(define (days-before-first-week date day-of-week-starting-week)
(let* ((first-day (make-date 0 0 0 0
1
1
(define (date-week-number date day-of-week-starting-week)
(quotient (- (date-year-day date)
1
- (priv:days-before-first-week date day-of-week-starting-week))
+ (days-before-first-week date day-of-week-starting-week))
7))
(define (current-date . tz-offset)
(time-utc->date
time
(if (null? tz-offset)
- (priv:local-tz-offset time)
+ (local-tz-offset time)
(car tz-offset)))))
;; given a 'two digit' number, find the year within 50 years +/-
-(define (priv:natural-year n)
+(define (natural-year n)
(let* ((current-year (date-year (current-date)))
(current-century (* (quotient current-year 100) 100)))
(cond
(month (date-month date))
(year (date-year date))
(offset (date-zone-offset date)))
- (+ (priv:encode-julian-day-number day month year)
+ (+ (encode-julian-day-number day month year)
(- 1/2)
(+ (/ (+ (- offset)
(* hour 60 60)
(* minute 60)
second
- (/ nanosecond priv:nano))
- priv:sid)))))
+ (/ nanosecond nano))
+ sid)))))
(define (date->modified-julian-day date)
(- (date->julian-day date)
(define (time-utc->julian-day time)
(if (not (eq? (time-type time) time-utc))
- (priv:time-error 'time->date 'incompatible-time-types time))
- (+ (/ (+ (time-second time) (/ (time-nanosecond time) priv:nano))
- priv:sid)
- priv:tai-epoch-in-jd))
+ (time-error 'time->date 'incompatible-time-types time))
+ (+ (/ (+ (time-second time) (/ (time-nanosecond time) nano))
+ sid)
+ tai-epoch-in-jd))
(define (time-utc->modified-julian-day time)
(- (time-utc->julian-day time)
(define (time-tai->julian-day time)
(if (not (eq? (time-type time) time-tai))
- (priv:time-error 'time->date 'incompatible-time-types time))
+ (time-error 'time->date 'incompatible-time-types time))
(+ (/ (+ (- (time-second time)
- (priv:leap-second-delta (time-second time)))
- (/ (time-nanosecond time) priv:nano))
- priv:sid)
- priv:tai-epoch-in-jd))
+ (leap-second-delta (time-second time)))
+ (/ (time-nanosecond time) nano))
+ sid)
+ tai-epoch-in-jd))
(define (time-tai->modified-julian-day time)
(- (time-tai->julian-day time)
;; this is the same as time-tai->julian-day
(define (time-monotonic->julian-day time)
(if (not (eq? (time-type time) time-monotonic))
- (priv:time-error 'time->date 'incompatible-time-types time))
+ (time-error 'time->date 'incompatible-time-types time))
(+ (/ (+ (- (time-second time)
- (priv:leap-second-delta (time-second time)))
- (/ (time-nanosecond time) priv:nano))
- priv:sid)
- priv:tai-epoch-in-jd))
+ (leap-second-delta (time-second time)))
+ (/ (time-nanosecond time) nano))
+ sid)
+ tai-epoch-in-jd))
(define (time-monotonic->modified-julian-day time)
(- (time-monotonic->julian-day time)
4800001/2))
(define (julian-day->time-utc jdn)
- (let ((secs (* priv:sid (- jdn priv:tai-epoch-in-jd))))
+ (let ((secs (* sid (- jdn tai-epoch-in-jd))))
(receive (seconds parts)
- (priv:split-real secs)
+ (split-real secs)
(make-time time-utc
- (* parts priv:nano)
+ (* parts nano)
seconds))))
(define (julian-day->time-tai jdn)
(define (julian-day->date jdn . tz-offset)
(let* ((time (julian-day->time-utc jdn))
(offset (if (null? tz-offset)
- (priv:local-tz-offset time)
+ (local-tz-offset time)
(car tz-offset))))
(time-utc->date time offset)))
;; as if number->string was used. if string is longer than or equal
;; in length to LENGTH, it's as if number->string was used.
-(define (priv:padding n pad-with length)
+(define (padding n pad-with length)
(let* ((str (number->string n))
(str-len (string-length str)))
(if (or (>= str-len length)
str
(string-append (make-string (- length str-len) pad-with) str))))
-(define (priv:last-n-digits i n)
+(define (last-n-digits i n)
(abs (remainder i (expt 10 n))))
-(define (priv:locale-abbr-weekday n) (locale-day-short (+ 1 n)))
-(define (priv:locale-long-weekday n) (locale-day (+ 1 n)))
-(define priv:locale-abbr-month locale-month-short)
-(define priv:locale-long-month locale-month)
+(define (locale-abbr-weekday n) (locale-day-short (+ 1 n)))
+(define (locale-long-weekday n) (locale-day (+ 1 n)))
+(define locale-abbr-month locale-month-short)
+(define locale-long-month locale-month)
-(define (priv:date-reverse-lookup needle haystack-ref haystack-len
+(define (date-reverse-lookup needle haystack-ref haystack-len
same?)
;; Lookup NEEDLE (a string) using HAYSTACK-REF (a one argument procedure
;; that returns a string corresponding to the given index) by passing it
index)
(else (loop (+ index 1))))))
-(define (priv:locale-abbr-weekday->index string)
- (priv:date-reverse-lookup string locale-day-short 7 string=?))
+(define (locale-abbr-weekday->index string)
+ (date-reverse-lookup string locale-day-short 7 string=?))
-(define (priv:locale-long-weekday->index string)
- (priv:date-reverse-lookup string locale-day 7 string=?))
+(define (locale-long-weekday->index string)
+ (date-reverse-lookup string locale-day 7 string=?))
-(define (priv:locale-abbr-month->index string)
- (priv:date-reverse-lookup string priv:locale-abbr-month 12 string=?))
+(define (locale-abbr-month->index string)
+ (date-reverse-lookup string locale-abbr-month 12 string=?))
-(define (priv:locale-long-month->index string)
- (priv:date-reverse-lookup string priv:locale-long-month 12 string=?))
+(define (locale-long-month->index string)
+ (date-reverse-lookup string locale-long-month 12 string=?))
;; FIXME: mkoeppe: Put a symbolic time zone in the date structs.
;; Print it here instead of the numerical offset if available.
-(define (priv:locale-print-time-zone date port)
- (priv:tz-printer (date-zone-offset date) port))
+(define (locale-print-time-zone date port)
+ (tz-printer (date-zone-offset date) port))
-(define (priv:locale-am/pm hr)
- (if (> hr 11) (priv:locale-pm) (priv:locale-am)))
+(define (locale-am-string/pm hr)
+ (if (> hr 11) (locale-pm-string) (locale-am-string)))
-(define (priv:tz-printer offset port)
+(define (tz-printer offset port)
(cond
((= offset 0) (display "Z" port))
((negative? offset) (display "-" port))
(if (not (= offset 0))
(let ((hours (abs (quotient offset (* 60 60))))
(minutes (abs (quotient (remainder offset (* 60 60)) 60))))
- (display (priv:padding hours #\0 2) port)
- (display (priv:padding minutes #\0 2) port))))
+ (display (padding hours #\0 2) port)
+ (display (padding minutes #\0 2) port))))
;; A table of output formatting directives.
;; the first time is the format char.
;; the second is a procedure that takes the date, a padding character
;; (which might be #f), and the output port.
;;
-(define priv:directives
+(define directives
(list
(cons #\~ (lambda (date pad-with port)
(display #\~ port)))
(cons #\a (lambda (date pad-with port)
- (display (priv:locale-abbr-weekday (date-week-day date))
+ (display (locale-abbr-weekday (date-week-day date))
port)))
(cons #\A (lambda (date pad-with port)
- (display (priv:locale-long-weekday (date-week-day date))
+ (display (locale-long-weekday (date-week-day date))
port)))
(cons #\b (lambda (date pad-with port)
- (display (priv:locale-abbr-month (date-month date))
+ (display (locale-abbr-month (date-month date))
port)))
(cons #\B (lambda (date pad-with port)
- (display (priv:locale-long-month (date-month date))
+ (display (locale-long-month (date-month date))
port)))
(cons #\c (lambda (date pad-with port)
- (display (date->string date priv:locale-date-time-format) port)))
+ (display (date->string date locale-date-time-format) port)))
(cons #\d (lambda (date pad-with port)
- (display (priv:padding (date-day date)
+ (display (padding (date-day date)
#\0 2)
port)))
(cons #\D (lambda (date pad-with port)
(display (date->string date "~m/~d/~y") port)))
(cons #\e (lambda (date pad-with port)
- (display (priv:padding (date-day date)
+ (display (padding (date-day date)
#\Space 2)
port)))
(cons #\f (lambda (date pad-with port)
(if (> (date-nanosecond date)
- priv:nano)
- (display (priv:padding (+ (date-second date) 1)
+ nano)
+ (display (padding (+ (date-second date) 1)
pad-with 2)
port)
- (display (priv:padding (date-second date)
+ (display (padding (date-second date)
pad-with 2)
port))
(receive (i f)
- (priv:split-real (/
+ (split-real (/
(date-nanosecond date)
- priv:nano 1.0))
+ nano 1.0))
(let* ((ns (number->string f))
(le (string-length ns)))
(if (> le 2)
(begin
- (display (priv:locale-number-separator) port)
+ (display (locale-decimal-point) port)
(display (substring ns 2 le) port)))))))
(cons #\h (lambda (date pad-with port)
(display (date->string date "~b") port)))
(cons #\H (lambda (date pad-with port)
- (display (priv:padding (date-hour date)
+ (display (padding (date-hour date)
pad-with 2)
port)))
(cons #\I (lambda (date pad-with port)
(let ((hr (date-hour date)))
(if (> hr 12)
- (display (priv:padding (- hr 12)
+ (display (padding (- hr 12)
pad-with 2)
port)
- (display (priv:padding hr
+ (display (padding hr
pad-with 2)
port)))))
(cons #\j (lambda (date pad-with port)
- (display (priv:padding (date-year-day date)
+ (display (padding (date-year-day date)
pad-with 3)
port)))
(cons #\k (lambda (date pad-with port)
- (display (priv:padding (date-hour date)
+ (display (padding (date-hour date)
#\Space 2)
port)))
(cons #\l (lambda (date pad-with port)
(let ((hr (if (> (date-hour date) 12)
(- (date-hour date) 12) (date-hour date))))
- (display (priv:padding hr #\Space 2)
+ (display (padding hr #\Space 2)
port))))
(cons #\m (lambda (date pad-with port)
- (display (priv:padding (date-month date)
+ (display (padding (date-month date)
pad-with 2)
port)))
(cons #\M (lambda (date pad-with port)
- (display (priv:padding (date-minute date)
+ (display (padding (date-minute date)
pad-with 2)
port)))
(cons #\n (lambda (date pad-with port)
(newline port)))
(cons #\N (lambda (date pad-with port)
- (display (priv:padding (date-nanosecond date)
+ (display (padding (date-nanosecond date)
pad-with 7)
port)))
(cons #\p (lambda (date pad-with port)
- (display (priv:locale-am/pm (date-hour date)) port)))
+ (display (locale-am-string/pm (date-hour date)) port)))
(cons #\r (lambda (date pad-with port)
(display (date->string date "~I:~M:~S ~p") port)))
(cons #\s (lambda (date pad-with port)
(display (time-second (date->time-utc date)) port)))
(cons #\S (lambda (date pad-with port)
(if (> (date-nanosecond date)
- priv:nano)
- (display (priv:padding (+ (date-second date) 1)
+ nano)
+ (display (padding (+ (date-second date) 1)
pad-with 2)
port)
- (display (priv:padding (date-second date)
+ (display (padding (date-second date)
pad-with 2)
port))))
(cons #\t (lambda (date pad-with port)
(cons #\T (lambda (date pad-with port)
(display (date->string date "~H:~M:~S") port)))
(cons #\U (lambda (date pad-with port)
- (if (> (priv:days-before-first-week date 0) 0)
- (display (priv:padding (+ (date-week-number date 0) 1)
+ (if (> (days-before-first-week date 0) 0)
+ (display (padding (+ (date-week-number date 0) 1)
#\0 2) port)
- (display (priv:padding (date-week-number date 0)
+ (display (padding (date-week-number date 0)
#\0 2) port))))
(cons #\V (lambda (date pad-with port)
- (display (priv:padding (date-week-number date 1)
+ (display (padding (date-week-number date 1)
#\0 2) port)))
(cons #\w (lambda (date pad-with port)
(display (date-week-day date) port)))
(cons #\x (lambda (date pad-with port)
- (display (date->string date priv:locale-short-date-format) port)))
+ (display (date->string date locale-short-date-format) port)))
(cons #\X (lambda (date pad-with port)
- (display (date->string date priv:locale-time-format) port)))
+ (display (date->string date locale-time-format) port)))
(cons #\W (lambda (date pad-with port)
- (if (> (priv:days-before-first-week date 1) 0)
- (display (priv:padding (+ (date-week-number date 1) 1)
+ (if (> (days-before-first-week date 1) 0)
+ (display (padding (+ (date-week-number date 1) 1)
#\0 2) port)
- (display (priv:padding (date-week-number date 1)
+ (display (padding (date-week-number date 1)
#\0 2) port))))
(cons #\y (lambda (date pad-with port)
- (display (priv:padding (priv:last-n-digits
+ (display (padding (last-n-digits
(date-year date) 2)
pad-with
2)
(cons #\Y (lambda (date pad-with port)
(display (date-year date) port)))
(cons #\z (lambda (date pad-with port)
- (priv:tz-printer (date-zone-offset date) port)))
+ (tz-printer (date-zone-offset date) port)))
(cons #\Z (lambda (date pad-with port)
- (priv:locale-print-time-zone date port)))
+ (locale-print-time-zone date port)))
(cons #\1 (lambda (date pad-with port)
(display (date->string date "~Y-~m-~d") port)))
(cons #\2 (lambda (date pad-with port)
(display (date->string date "~Y-~m-~dT~k:~M:~S") port)))))
-(define (priv:get-formatter char)
- (let ((associated (assoc char priv:directives)))
+(define (get-formatter char)
+ (let ((associated (assoc char directives)))
(if associated (cdr associated) #f)))
-(define (priv:date-printer date index format-string str-len port)
+(define (date-printer date index format-string str-len port)
(if (< index str-len)
(let ((current-char (string-ref format-string index)))
(if (not (char=? current-char #\~))
(begin
(display current-char port)
- (priv:date-printer date (+ index 1) format-string str-len port))
+ (date-printer date (+ index 1) format-string str-len port))
(if (= (+ index 1) str-len) ; bad format string.
- (priv:time-error 'priv:date-printer 'bad-date-format-string
+ (time-error 'date-printer 'bad-date-format-string
format-string)
(let ((pad-char? (string-ref format-string (+ index 1))))
(cond
((char=? pad-char? #\-)
(if (= (+ index 2) str-len) ; bad format string.
- (priv:time-error 'priv:date-printer
+ (time-error 'date-printer
'bad-date-format-string
format-string)
- (let ((formatter (priv:get-formatter
+ (let ((formatter (get-formatter
(string-ref format-string
(+ index 2)))))
(if (not formatter)
- (priv:time-error 'priv:date-printer
+ (time-error 'date-printer
'bad-date-format-string
format-string)
(begin
(formatter date #f port)
- (priv:date-printer date
+ (date-printer date
(+ index 3)
format-string
str-len
((char=? pad-char? #\_)
(if (= (+ index 2) str-len) ; bad format string.
- (priv:time-error 'priv:date-printer
+ (time-error 'date-printer
'bad-date-format-string
format-string)
- (let ((formatter (priv:get-formatter
+ (let ((formatter (get-formatter
(string-ref format-string
(+ index 2)))))
(if (not formatter)
- (priv:time-error 'priv:date-printer
+ (time-error 'date-printer
'bad-date-format-string
format-string)
(begin
(formatter date #\Space port)
- (priv:date-printer date
+ (date-printer date
(+ index 3)
format-string
str-len
port))))))
(else
- (let ((formatter (priv:get-formatter
+ (let ((formatter (get-formatter
(string-ref format-string
(+ index 1)))))
(if (not formatter)
- (priv:time-error 'priv:date-printer
+ (time-error 'date-printer
'bad-date-format-string
format-string)
(begin
(formatter date #\0 port)
- (priv:date-printer date
+ (date-printer date
(+ index 2)
format-string
str-len
(define (date->string date . format-string)
(let ((str-port (open-output-string))
(fmt-str (if (null? format-string) "~c" (car format-string))))
- (priv:date-printer date 0 fmt-str (string-length fmt-str) str-port)
+ (date-printer date 0 fmt-str (string-length fmt-str) str-port)
(get-output-string str-port)))
-(define (priv:char->int ch)
+(define (char->int ch)
(case ch
((#\0) 0)
((#\1) 1)
((#\7) 7)
((#\8) 8)
((#\9) 9)
- (else (priv:time-error 'priv:char->int 'bad-date-template-string
+ (else (time-error 'char->int 'bad-date-template-string
(list "Non-integer character" ch)))))
;; read an integer upto n characters long on port; upto -> #f is any length
-(define (priv:integer-reader upto port)
+(define (integer-reader upto port)
(let loop ((accum 0) (nchars 0))
(let ((ch (peek-char port)))
(if (or (eof-object? ch)
(not (char-numeric? ch))
(and upto (>= nchars upto)))
accum
- (loop (+ (* accum 10) (priv:char->int (read-char port)))
+ (loop (+ (* accum 10) (char->int (read-char port)))
(+ nchars 1))))))
-(define (priv:make-integer-reader upto)
+(define (make-integer-reader upto)
(lambda (port)
- (priv:integer-reader upto port)))
+ (integer-reader upto port)))
;; read *exactly* n characters and convert to integer; could be padded
-(define (priv:integer-reader-exact n port)
+(define (integer-reader-exact n port)
(let ((padding-ok #t))
(define (accum-int port accum nchars)
(let ((ch (peek-char port)))
(cond
((>= nchars n) accum)
((eof-object? ch)
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
"Premature ending to integer read."))
((char-numeric? ch)
(set! padding-ok #f)
(accum-int port
- (+ (* accum 10) (priv:char->int (read-char port)))
+ (+ (* accum 10) (char->int (read-char port)))
(+ nchars 1)))
(padding-ok
(read-char port) ; consume padding
(accum-int port accum (+ nchars 1)))
(else ; padding where it shouldn't be
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
"Non-numeric characters in integer read.")))))
(accum-int port 0 0)))
-(define (priv:make-integer-exact-reader n)
+(define (make-integer-exact-reader n)
(lambda (port)
- (priv:integer-reader-exact n port)))
+ (integer-reader-exact n port)))
-(define (priv:zone-reader port)
+(define (zone-reader port)
(let ((offset 0)
(positive? #f))
(let ((ch (read-char port)))
(if (eof-object? ch)
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
(list "Invalid time zone +/-" ch)))
(if (or (char=? ch #\Z) (char=? ch #\z))
0
((char=? ch #\+) (set! positive? #t))
((char=? ch #\-) (set! positive? #f))
(else
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
(list "Invalid time zone +/-" ch))))
(let ((ch (read-char port)))
(if (eof-object? ch)
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
(list "Invalid time zone number" ch)))
- (set! offset (* (priv:char->int ch)
+ (set! offset (* (char->int ch)
10 60 60)))
(let ((ch (read-char port)))
(if (eof-object? ch)
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
(list "Invalid time zone number" ch)))
- (set! offset (+ offset (* (priv:char->int ch)
+ (set! offset (+ offset (* (char->int ch)
60 60))))
(let ((ch (read-char port)))
(if (eof-object? ch)
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
(list "Invalid time zone number" ch)))
- (set! offset (+ offset (* (priv:char->int ch)
+ (set! offset (+ offset (* (char->int ch)
10 60))))
(let ((ch (read-char port)))
(if (eof-object? ch)
- (priv:time-error 'string->date 'bad-date-template-string
+ (time-error 'string->date 'bad-date-template-string
(list "Invalid time zone number" ch)))
- (set! offset (+ offset (* (priv:char->int ch)
+ (set! offset (+ offset (* (char->int ch)
60))))
(if positive? offset (- offset)))))))
;; looking at a char, read the char string, run thru indexer, return index
-(define (priv:locale-reader port indexer)
+(define (locale-reader port indexer)
(define (read-char-string result)
(let ((ch (peek-char port)))
(let* ((str (read-char-string '()))
(index (indexer str)))
- (if index index (priv:time-error 'string->date
+ (if index index (time-error 'string->date
'bad-date-template-string
(list "Invalid string for " indexer)))))
-(define (priv:make-locale-reader indexer)
+(define (make-locale-reader indexer)
(lambda (port)
- (priv:locale-reader port indexer)))
+ (locale-reader port indexer)))
-(define (priv:make-char-id-reader char)
+(define (make-char-id-reader char)
(lambda (port)
(if (char=? char (read-char port))
char
- (priv:time-error 'string->date
+ (time-error 'string->date
'bad-date-template-string
"Invalid character match."))))
;; some object (here, always the date) and (probably) side-effects it.
;; If no action is required, as with ~A, this element may be #f.
-(define priv:read-directives
- (let ((ireader4 (priv:make-integer-reader 4))
- (ireader2 (priv:make-integer-reader 2))
- (eireader2 (priv:make-integer-exact-reader 2))
- (locale-reader-abbr-weekday (priv:make-locale-reader
- priv:locale-abbr-weekday->index))
- (locale-reader-long-weekday (priv:make-locale-reader
- priv:locale-long-weekday->index))
- (locale-reader-abbr-month (priv:make-locale-reader
- priv:locale-abbr-month->index))
- (locale-reader-long-month (priv:make-locale-reader
- priv:locale-long-month->index))
+(define read-directives
+ (let ((ireader4 (make-integer-reader 4))
+ (ireader2 (make-integer-reader 2))
+ (eireader2 (make-integer-exact-reader 2))
+ (locale-reader-abbr-weekday (make-locale-reader
+ locale-abbr-weekday->index))
+ (locale-reader-long-weekday (make-locale-reader
+ locale-long-weekday->index))
+ (locale-reader-abbr-month (make-locale-reader
+ locale-abbr-month->index))
+ (locale-reader-long-month (make-locale-reader
+ locale-long-month->index))
(char-fail (lambda (ch) #t)))
(list
- (list #\~ char-fail (priv:make-char-id-reader #\~) #f)
+ (list #\~ char-fail (make-char-id-reader #\~) #f)
(list #\a char-alphabetic? locale-reader-abbr-weekday #f)
(list #\A char-alphabetic? locale-reader-long-weekday #f)
(list #\b char-alphabetic? locale-reader-abbr-month
(set-date-second! object val)))
(list #\y char-fail eireader2
(lambda (val object)
- (set-date-year! object (priv:natural-year val))))
+ (set-date-year! object (natural-year val))))
(list #\Y char-numeric? ireader4 (lambda (val object)
(set-date-year! object val)))
(list #\z (lambda (c)
(char=? c #\z)
(char=? c #\+)
(char=? c #\-)))
- priv:zone-reader (lambda (val object)
+ zone-reader (lambda (val object)
(set-date-zone-offset! object val))))))
(define (priv:string->date date index format-string str-len port template-string)
(define (skip-until port skipper)
(let ((ch (peek-char port)))
(if (eof-object? ch)
- (priv:time-error 'string->date 'bad-date-format-string template-string)
+ (time-error 'string->date 'bad-date-format-string template-string)
(if (not (skipper ch))
(begin (read-char port) (skip-until port skipper))))))
(if (< index str-len)
(let ((port-char (read-char port)))
(if (or (eof-object? port-char)
(not (char=? current-char port-char)))
- (priv:time-error 'string->date
+ (time-error 'string->date
'bad-date-format-string template-string))
(priv:string->date date
(+ index 1)
template-string))
;; otherwise, it's an escape, we hope
(if (> (+ index 1) str-len)
- (priv:time-error 'string->date
+ (time-error 'string->date
'bad-date-format-string template-string)
(let* ((format-char (string-ref format-string (+ index 1)))
- (format-info (assoc format-char priv:read-directives)))
+ (format-info (assoc format-char read-directives)))
(if (not format-info)
- (priv:time-error 'string->date
+ (time-error 'string->date
'bad-date-format-string template-string)
(begin
(let ((skipper (cadr format-info))
(skip-until port skipper)
(let ((val (reader port)))
(if (eof-object? val)
- (priv:time-error 'string->date
+ (time-error 'string->date
'bad-date-format-string
template-string)
(if actor (actor val date))))
template-string))))))))))
(define (string->date input-string template-string)
- (define (priv:date-ok? date)
+ (define (date-ok? date)
(and (date-nanosecond date)
(date-second date)
(date-minute date)
;; get it right (think of the double/missing hour in the
;; night when we are switching between normal time and DST).
(set-date-zone-offset! newdate
- (priv:local-tz-offset
+ (local-tz-offset
(make-time time-utc 0 0)))
(set-date-zone-offset! newdate
- (priv:local-tz-offset
+ (local-tz-offset
(date->time-utc newdate)))))
- (if (priv:date-ok? newdate)
+ (if (date-ok? newdate)
newdate
- (priv:time-error
+ (time-error
'string->date
'bad-date-format-string
(list "Incomplete date read. " newdate template-string)))))
HCoop / bpt / guile.git / commitdiff