You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.8 KiB
Racket
59 lines
1.8 KiB
Racket
#lang racket/base
|
|
(require racket/date)
|
|
(require racket/string)
|
|
(require racket/format)
|
|
|
|
|
|
(provide (all-defined-out))
|
|
|
|
; todo: contracts, tests, docs
|
|
|
|
(require (prefix-in williams: (planet williams/describe/describe)))
|
|
|
|
(define (describe x)
|
|
(williams:describe x)
|
|
x)
|
|
|
|
; debug utilities
|
|
(define months (list "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"))
|
|
|
|
(define last-message-time #f)
|
|
(define (seconds-since-last-message)
|
|
(define now (current-seconds))
|
|
(define then last-message-time)
|
|
(set! last-message-time now)
|
|
(if then
|
|
(- now then)
|
|
"--"))
|
|
|
|
|
|
(define (message . items)
|
|
(define (zero-fill str count)
|
|
(set! str (~a str))
|
|
(if (> (string-length str) count)
|
|
str
|
|
(string-append (make-string (- count (string-length str)) #\0) str)))
|
|
|
|
(define (make-date-string)
|
|
(define date (current-date))
|
|
(define date-fields (map (λ(x) (zero-fill x 2))
|
|
(list
|
|
; (date-day date)
|
|
; (list-ref months (sub1 (date-month date)))
|
|
(if (<= (date-hour date) 12)
|
|
(date-hour date) ; am hours + noon hour
|
|
(modulo (date-hour date) 12)) ; pm hours after noon hour
|
|
(date-minute date)
|
|
(date-second date)
|
|
; (if (< (date-hour date) 12) "am" "pm")
|
|
(seconds-since-last-message)
|
|
)))
|
|
(apply format "[~a:~a:~a ~as]" date-fields))
|
|
(displayln (string-join `(,(make-date-string) ,@(map (λ(x)(if (string? x) x (~v x))) items))) (current-error-port)))
|
|
|
|
|
|
; report the current value of the variable, then return it
|
|
(define-syntax-rule (report var)
|
|
(begin
|
|
(message 'var "=" var)
|
|
var)) |