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(*
Copyright © 2011 MLstate
This file is part of OPA.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*)
(* depends *)
module List = BaseList
(* -- *)
(* http://en.wikipedia.org/wiki/Computus *)
let easter y =
let a = y mod 19 in
let b = y / 100 in
let c = y mod 100 in
let d = b / 4 in
let e = b mod 4 in
let f = (b + 8) / 25 in
let g = (b - f + 1) / 3 in
let h = (19 * a + b - d - g + 15) mod 30 in
let i = c / 4 in
let k = c mod 4 in
let l = (32 + 2 * e + 2 * i - h - k) mod 7 in
let m = (a + 11 * h + 22 * l) / 451 in
let month = (h + l - 7 * m + 114) / 31 in
let day = ((h + l - 7 * m + 114) mod 31) + 1 in
month, day
open Unix
(* type date = Rfc1123 | Rfc850 | Asctime *)
let month = [|"Jan"; "Feb"; "Mar"; "Apr"; "May"; "Jun"; "Jul"; "Aug"; "Sep"; "Oct"; "Nov"; "Dec"|]
let month_li = Array.to_list month
let fullmonth = [|"January"; "February"; "March"; "April"; "May"; "June"
; "July"; "August"; "September"; "October"; "November"; "December"|]
let date1 dt = Printf.sprintf "%02d %s %04d" dt.tm_mday month.(dt.tm_mon) (1900+dt.tm_year)
let date2 dt = Printf.sprintf "%02d-%s-%02d" dt.tm_mday month.(dt.tm_mon)
(if dt.tm_year<100 then dt.tm_year else dt.tm_year-100)
let date3 dt = Printf.sprintf "%s %02d" month.(dt.tm_mon) dt.tm_mday
let time dt = Printf.sprintf "%02d:%02d:%02d" dt.tm_hour dt.tm_min dt.tm_sec
let wkday = [|"Sun"; "Mon"; "Tue"; "Wed"; "Thu"; "Fri"; "Sat"|]
let weekday = [|"Sunday"; "Monday"; "Tuesday"; "Wednesday"; "Thursday"; "Friday"; "Saturday"|]
(* let asctime dt = Printf.sprintf "%s %s %s %s" wkday.(dt.tm_wday) (date3 dt) (time dt) (year dt) *)
let rfc850 dt = Printf.sprintf "%s, %s %s GMT" weekday.(dt.tm_wday) (date2 dt) (time dt)
let rfc1123 dt = Printf.sprintf "%s, %s %s GMT" wkday.(dt.tm_wday) (date1 dt) (time dt)
let gmt_dec =
let time = Time.now () in
(Time.localtime time).tm_hour - (Time.gmtime time).tm_hour
let of_string (* rfc 1123 *) s =
Scanf.sscanf s "%s %02d %s %04d %02d:%02d:%02d GMT"
(fun _ day month year h min sec ->
let month_cnv =
match List.findi (fun i -> i = month) month_li with
| Some s -> s
| None -> failwith "Date.of_string"
in
Time.mktime ~year ~month:month_cnv ~day ~h:(h + gmt_dec) ~min ~sec ~ms:0
)
let date f dt = match f with
| `rfc1123 -> rfc1123 dt
| `rfc850 -> rfc850 dt
| `asctime -> "" (*asctime dt FIXME *)
let pretty_duration dur =
if dur < 2. then
Printf.sprintf "00:00:0%0.3f" dur
else if dur < 10. then
Printf.sprintf "00:00:0%.2f" dur
else if dur < 60. then
Printf.sprintf "00:00:%.1f" dur
else
let dur_sec = int_of_float dur in
let sec = dur_sec mod 60 in
let dur_min = dur_sec / 60 in
let min = dur_min mod 60 in
let dur_hour = dur_min / 60 in
let hour = dur_hour mod 24 in
if dur_hour < 24 then
Printf.sprintf "%02d:%02d:%02d" hour min sec
else
let dur_day = dur_hour / 24 in
if dur_day < 2 then
Printf.sprintf "%d day %d h %d min" dur_day hour min
else if dur_day < 31 then
Printf.sprintf "%d days %d h" dur_day hour
else
Printf.sprintf "%d days" dur_day
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