package gapi-ocaml
A simple OCaml client for Google Services
Install
Dune Dependency
Authors
Maintainers
Sources
v0.4.6.tar.gz
sha256=b84b680528a5e050014103a8e7a60a5d43efd5fefc3f838310bd46769775ab48
md5=8ee26acf1f6c6f5e24c7b57fa070a0a2
doc/src/gapi-ocaml.netstring-local/netdate.ml.html
Source file netdate.ml
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(* $Id$ * ---------------------------------------------------------------------- * *) (* Thanks to Nicolas George for contributing the parsing and format code *) open Printf (* Calculate local zone offset in minutes *) let get_localzone_at t = let gt = Unix.gmtime t and lt = Unix.localtime t in let min_diff = (lt.Unix.tm_hour * 60 + lt.Unix.tm_min) - (gt.Unix.tm_hour * 60 + gt.Unix.tm_min) in let day_diff = lt.Unix.tm_yday - gt.Unix.tm_yday in if day_diff < -1 || day_diff = 1 then (* local day is UTC day + 1 *) min_diff + 24*60 else if day_diff > 1 || day_diff = -1 then (* local day is UTC day - 1 *) min_diff - 24*60 else (* local day is UTC day *) min_diff ;; let get_localzone() = get_localzone_at (Unix.time()) ;; let localzone_nodst = (* Get the timezone on 01-01-1970 and on 01-07-1970, and take the smaller one. This hopefully works on the northern and southern hemisphere *) min (get_localzone_at 0.0) (get_localzone_at 15638400.0) ;; let localzone = get_localzone() ;; type localization = { full_day_names : string array; abbr_day_names : string array; parsed_day_names : string list array; full_month_names : string array; abbr_month_names : string array; parsed_month_names : string list array; timezone_names : (string * int * bool) list; am_particle : string; pm_particle : string; d_format : string; t_format : string; d_t_format : string; t_format_ampm : string; char_encoding : string; } let posix_l9n = { full_day_names = [| "Sunday"; "Monday"; "Tuesday"; "Wednesday"; "Thursday"; "Friday"; "Saturday" |]; abbr_day_names = [| "Sun"; "Mon"; "Tue"; "Wed"; "Thu"; "Fri"; "Sat" |] ; parsed_day_names = [| [ "sunday"; "sun" ]; [ "monday"; "mon" ]; [ "tuesday"; "tue"; "tues" ]; [ "wednesday"; "wed"; "wednes" ]; [ "thursday"; "thu"; "thur"; "thurs" ]; [ "friday"; "fri" ]; [ "saturday"; "sat" ]; |]; full_month_names = [| "January"; "February"; "March"; "April"; "May"; "June"; "July"; "August"; "September"; "October"; "November"; "December" |]; abbr_month_names = [| "Jan"; "Feb"; "Mar"; "Apr"; "May"; "Jun"; "Jul"; "Aug"; "Sep"; "Oct"; "Nov"; "Dec" |]; parsed_month_names = [| [ "january"; "jan" ]; [ "february"; "feb" ]; [ "march"; "mar" ]; [ "april"; "apr" ]; [ "may"; "may" ]; [ "june"; "jun" ]; [ "july"; "jul" ]; [ "august"; "aug" ]; [ "september"; "sep"; "sept" ]; [ "october"; "oct" ]; [ "november"; "nov" ]; [ "december"; "dec" ] |]; timezone_names = (* For a more complete list see http://en.wikipedia.org/wiki/List_of_time_zone_abbreviations We HAVE to implement the timezones mentioned in RFC-822 *) ( let z n = (n/100) * 60 in [ "gmt", z 0000, false; "ut", z 0000, false; "utc", z 0000, false; "wet", z 0000, false; "z", z 0000, false; "bst", z 0100, true; "cet", z 0100, false; "cest", z 0200, true; "met", z 0100, false; "mewt", z 0100, false; "mest", z 0200, true; "mesz", z 0200, true; "swt", z 0100, false; "sst", z 0200, true; "fwt", z 0100, false; "fst", z 0100, true; "eet", z 0200, false; "bt", z 0300, false; "zp4", z 0400, false; "zp5", z 0500, false; "zp6", z 0600, false; "wast", z 0700, false; "wadt", z 0800, true; "cct", z 0800, false; "jst", z 0900, false; "east", z 1000, false; "eadt", z 1100, true; "gst", z 1000, false; "nzt", z 1200, false; "nzst", z 1200, false; "nzdt", z 1300, true; "idle", z 1200, false; "idlw", z(-1200), false; "nt", z(-1100), false; "hst", z(-1000), false; "hdt", z(-0900), true; "cat", z(-1000), false; "ahst", z(-1000), false; "ydt", z(-0800), true; "yst", z(-0900), false; "pst", z(-0800), false; "pdt", z(-0700), true; "mst", z(-0700), false; "mdt", z(-0600), true; "cst", z(-0600), false; "cdt", z(-0500), true; "est", z(-0500), false; "edt", z(-0400), true; "ast", z(-0400), false; "adt", z(-0300), true; "wat", z(-0100), false; "at", z(-0200), false; ]); am_particle = "am"; pm_particle = "pm"; d_format = "%m/%d/%y"; t_format = "%H:%M:%S"; d_t_format = "%a %b %e %H:%M:%S %Y"; t_format_ampm = "%I:%M:%S %p"; char_encoding = "US-ASCII"; } let l9n_from_locale name = let open Netsys_posix in try let info = Netsys_posix.query_langinfo name in let enc = Netconversion.encoding_of_string info.nl_CODESET in let to_lower = Netconversion.ustring_to_lower enc in { full_day_names = [| info.nl_DAY_1; info.nl_DAY_2; info.nl_DAY_3; info.nl_DAY_4; info.nl_DAY_5; info.nl_DAY_6; info.nl_DAY_7; |]; abbr_day_names = [| info.nl_ABDAY_1; info.nl_ABDAY_2; info.nl_ABDAY_3; info.nl_ABDAY_4; info.nl_ABDAY_5; info.nl_ABDAY_6; info.nl_ABDAY_7; |]; parsed_day_names = [| [ to_lower info.nl_DAY_1; to_lower info.nl_ABDAY_1 ]; [ to_lower info.nl_DAY_2; to_lower info.nl_ABDAY_2 ]; [ to_lower info.nl_DAY_3; to_lower info.nl_ABDAY_3 ]; [ to_lower info.nl_DAY_4; to_lower info.nl_ABDAY_4 ]; [ to_lower info.nl_DAY_5; to_lower info.nl_ABDAY_5 ]; [ to_lower info.nl_DAY_6; to_lower info.nl_ABDAY_6 ]; [ to_lower info.nl_DAY_7; to_lower info.nl_ABDAY_7 ]; |]; full_month_names = [| info.nl_MON_1; info.nl_MON_2; info.nl_MON_3; info.nl_MON_4; info.nl_MON_5; info.nl_MON_6; info.nl_MON_7; info.nl_MON_8; info.nl_MON_9; info.nl_MON_10; info.nl_MON_11; info.nl_MON_12; |]; abbr_month_names = [| info.nl_ABMON_1; info.nl_ABMON_2; info.nl_ABMON_3; info.nl_ABMON_4; info.nl_ABMON_5; info.nl_ABMON_6; info.nl_ABMON_7; info.nl_ABMON_8; info.nl_ABMON_9; info.nl_ABMON_10; info.nl_ABMON_11; info.nl_ABMON_12; |]; parsed_month_names = [| [ to_lower info.nl_MON_1; to_lower info.nl_ABMON_1 ]; [ to_lower info.nl_MON_2; to_lower info.nl_ABMON_2 ]; [ to_lower info.nl_MON_3; to_lower info.nl_ABMON_3 ]; [ to_lower info.nl_MON_4; to_lower info.nl_ABMON_4 ]; [ to_lower info.nl_MON_5; to_lower info.nl_ABMON_5 ]; [ to_lower info.nl_MON_6; to_lower info.nl_ABMON_6 ]; [ to_lower info.nl_MON_7; to_lower info.nl_ABMON_7 ]; [ to_lower info.nl_MON_8; to_lower info.nl_ABMON_8 ]; [ to_lower info.nl_MON_9; to_lower info.nl_ABMON_9 ]; [ to_lower info.nl_MON_10; to_lower info.nl_ABMON_10 ]; [ to_lower info.nl_MON_11; to_lower info.nl_ABMON_11 ]; [ to_lower info.nl_MON_12; to_lower info.nl_ABMON_12 ]; |]; timezone_names = posix_l9n.timezone_names; am_particle = to_lower info.nl_AM_STR; pm_particle = to_lower info.nl_PM_STR; d_format = info.nl_D_FMT; t_format = info.nl_T_FMT; d_t_format = info.nl_D_T_FMT; t_format_ampm = info.nl_T_FMT_AMPM; char_encoding = info.nl_CODESET } with | _ -> posix_l9n type token = | Number of int * int (* number of digits, value *) | Day of int | Month of int | Meridian of bool | Zone of int * bool | Dst | Plus | Minus | Comma | Colon | Slash | Dot | Time (* "T" *) | Invalid ;; type compiled_localization = { l9n : localization; tokens : (string, token) Hashtbl.t } let compile_l9n l9n = let tokens = Hashtbl.create 53 in let add_token (name, value) = Hashtbl.replace tokens name value in List.iter (fun (name,zone,isdst) -> add_token (name, (Zone(zone,isdst))) ) l9n.timezone_names; add_token (l9n.am_particle, Meridian false); add_token (l9n.pm_particle, Meridian true); Array.iteri (fun i names -> List.iter (fun name -> add_token (name, Month(i+1)) ) names ) l9n.parsed_month_names; Array.iteri (fun i names -> List.iter (fun name -> add_token (name, Day i) ) names ) l9n.parsed_day_names; add_token ("t", Time); add_token ("dst", Dst); { l9n = l9n; tokens = tokens } let c_posix_l9n = compile_l9n posix_l9n let rec ten_power n = if n<=0 then 1 else 10 * (ten_power (n-1)) let to_lower cl9n = try let enc = Netconversion.encoding_of_string cl9n.l9n.char_encoding in fun s -> Netconversion.ustring_to_lower enc s with _ -> (fun s -> s) let to_upper cl9n = try let enc = Netconversion.encoding_of_string cl9n.l9n.char_encoding in fun s -> Netconversion.ustring_to_upper enc s with _ -> (fun s -> s) let stream_cons prefix stream = (* Prefix the list [prefix] before stream *) let prefix = ref prefix in Stream.from (fun _ -> match !prefix with | [] -> ( try Some(Stream.next stream) with Stream.Failure -> None ) | p :: prefix' -> prefix := prefix'; Some p ) let stream_njunk n stream = for k = 1 to n do Stream.junk stream done let tokens_of_string cl9n str = let to_lower = to_lower cl9n in let rec scan_any stream = match Stream.peek stream with | Some('0'..'9' as c) -> Stream.junk stream; scan_number (1, int_of_char c - 48) stream | Some(('a'..'z' | 'A'..'Z' | '\128'..'\255') as c) -> Stream.junk stream; let b = Buffer.create 16 in Buffer.add_char b c; scan_word b stream | Some '(' -> Stream.junk stream; scan_comment 0 stream | Some (' ' | '\t') -> Stream.junk stream; scan_any stream | Some '+' -> Stream.junk stream; stream_cons [ Plus ] (scan_any stream) | Some '-' -> Stream.junk stream; stream_cons [ Minus ] (scan_any stream) | Some ':' -> Stream.junk stream; stream_cons [ Colon ] (scan_any stream) | Some ',' -> Stream.junk stream; stream_cons [ Comma ] (scan_any stream) | Some '/' -> Stream.junk stream; stream_cons [ Slash ] (scan_any stream) | Some '.' -> Stream.junk stream; stream_cons [ Dot ] (scan_any stream) | Some _ -> Stream.junk stream; stream_cons [ Invalid ] (scan_any stream) | None -> Stream.of_list [] and scan_number (l,a) stream = match Stream.peek stream with | Some ( ('0'..'9') as c ) -> Stream.junk stream; if l = 9 then failwith "Netdate: number too large"; scan_number (l+1, a * 10 + (int_of_char c - 48)) stream | _ -> stream_cons [ Number(l,a) ] (scan_any stream) and scan_word b stream = match Stream.peek stream with | Some(('a'..'z' | 'A'..'Z' | '\128'..'\255') as c) -> Stream.junk stream; Buffer.add_char b c; scan_word b stream | Some '.' -> Stream.junk stream; scan_word b stream | _ -> let s = to_lower (Buffer.contents b) in let tok = try Hashtbl.find cl9n.tokens s with Not_found -> Invalid in stream_cons [ tok ] (scan_any stream) and scan_comment n stream = match Stream.peek stream with | Some ')' -> Stream.junk stream; if n=0 then scan_any stream else scan_comment (n-1) stream | Some '(' -> Stream.junk stream; scan_comment (n+1) stream | Some _ -> Stream.junk stream; scan_comment n stream | None -> raise Stream.Failure in scan_any (Stream.of_string str) ;; type t = { year : int; (* complete year *) month : int; (* 1..12 *) day : int; (* 1..31 *) hour : int; minute : int; second : int; nanos : int; zone : int; (* in minutes; 60 = UTC+0100 *) week_day : int (* 0 = sunday; -1 if not given *) } ;; let parse ?(localzone=false) ?zone:dzone ?(l9n = c_posix_l9n) str = let invalid() = invalid_arg "Netdate.parse" in let tokens = tokens_of_string l9n str in let hour = ref None and minute = ref None and second = ref None and nanos = ref None and zone = ref None and week_day = ref None and day = ref None and month = ref None and year = ref None in let add_data ?h ?m ?s ?ns ?mdn ?tz ?wd ?md ?mo ?y ?y2 () = (* tz as in the above table *) let may_store r = function | None -> () | v when !r = None -> r := v | _ -> invalid() in let h = match h with | None -> None | Some h -> match mdn with | None when h >= 0 && h <= 23 -> Some h | Some false when h > 0 && h <= 11 -> Some h | Some false when h = 12 -> Some 0 | Some true when h > 0 && h <= 11 -> Some (h + 12) | Some true when h = 12 -> Some 12 | _ -> invalid() in let y = match y with | None -> ( match y2 with | Some y -> if y < 69 then Some (2000 + y) else Some(1900 + y) | None -> None ) | Some y -> Some y in may_store hour h; may_store minute m; may_store second s; may_store nanos ns; may_store zone tz; may_store week_day wd; may_store day md; may_store month mo; may_store year y in let rec scan_gen stream = match Stream.peek stream with | Some(Number(l,n)) -> Stream.junk stream; scan_number (l,n) stream | Some Time -> Stream.junk stream; let tok1 = Stream.next stream in let tok2 = Stream.next stream in let tok3 = Stream.next stream in ( match tok1,tok2,tok3 with | Number((0|1|2),n), Colon, Number((0|1|2),m) -> scan_hour n m stream | _ -> invalid() ) | Some(Zone(tz,isdst)) -> Stream.junk stream; let dst = scan_dst stream in let eff_tz = if isdst then tz else match dst with | Some true -> tz + 60 | _ -> tz in add_data ~tz:eff_tz (); scan_gen stream | Some(Day wd) -> Stream.junk stream; let _ = scan_opt_coma stream in add_data ~wd (); scan_gen stream | Some(Month mo) -> Stream.junk stream; let tok1 = Stream.next stream in ( match tok1 with | Number(lmd,md) -> scan_date_m mo (lmd,md) stream | _ -> invalid() ) | Some _ -> Stream.junk stream; invalid() | None -> () and scan_number (l,n) stream = match Stream.peek stream with | Some(Meridian mdn) -> Stream.junk stream; add_data ~h:n ~mdn (); scan_gen stream | Some Colon -> Stream.junk stream; let tok1 = Stream.next stream in ( match tok1 with | Number((0|1|2),m) -> if l <= 2 then scan_hour n m stream else invalid() | _ -> invalid() ) | Some Slash -> Stream.junk stream; let tok1 = Stream.next stream in ( match tok1 with | Number((0|1|2),m) -> scan_date_s (l,n) m stream | _ -> invalid() ) | Some Dot -> Stream.junk stream; let tok1 = Stream.next stream in ( match tok1 with | Number((0|1|2),m) -> if l<=2 then scan_date_dot n m stream else invalid() | _ -> invalid() ) | Some Minus -> Stream.junk stream; scan_date_d (l,n) stream | Some (Month mo) -> Stream.junk stream; add_data ~md:n ~mo (); scan_gen stream | _ -> if l=4 then add_data ~y:n () else invalid(); scan_gen stream and scan_hour h m stream = match Stream.peek stream with | Some Colon -> Stream.junk stream; let tok1 = Stream.next stream in ( match tok1 with | Number(_,s) -> scan_hour_second_frac h m s stream | _ -> invalid() ) | _ -> let tz_opt = scan_tz_opt stream in ( match tz_opt with | Some tz -> add_data ~h ~m ~tz (); scan_gen stream | None -> let mdn = scan_opt_meridian stream in add_data ~h ~m ?mdn (); scan_gen stream ) and scan_tz_opt stream = match Stream.peek stream with | Some Plus -> Stream.junk stream; Some(scan_tz_details 1 stream) | Some Minus -> Stream.junk stream; Some(scan_tz_details (-1) stream) | _ -> None and scan_tz_details sign stream = match Stream.peek stream with | Some(Number(l,tz)) when l=4 -> Stream.junk stream; sign * ((tz/100) * 60 + (tz mod 100)) | Some(Number(l,tz)) when l<=2 -> Stream.junk stream; scan_tz_details2 sign tz stream | _ -> invalid() and scan_tz_details2 sign tz1 stream = match Stream.npeek 2 stream with | [ Colon; Number((0|1|2),tz2) ] -> stream_njunk 2 stream; sign * (60 * tz1 + tz2) | _ -> sign * 60 * tz1 and scan_hour_second_frac h m s stream = match Stream.npeek 2 stream with | [ Dot; Number(l,f) ] -> (* e.g. 12:50:48.12345 *) stream_njunk 2 stream; let ns = f * ten_power (9-l) in scan_hour_second h m s ns stream | _ -> scan_hour_second h m s 0 stream and scan_hour_second h m s ns stream = match scan_tz_opt stream with | Some tz -> add_data ~h ~m ~s ~ns ~tz (); scan_gen stream | None -> let mdn = scan_opt_meridian stream in add_data ~h ~m ~s ~ns ?mdn (); scan_gen stream and scan_date_s (ln,n) m stream = match Stream.npeek 2 stream with | [ Slash; Number(lp,p) ] -> stream_njunk 2 stream; if ln = 4 then add_data ~y:n ~mo:m ~md:p () else if lp = 4 then add_data ~y:p ~mo:n ~md:m () else if lp = 2 then add_data ~y2:p ~mo:n ~md:m () else invalid(); scan_gen stream | _ -> add_data ~mo:n ~md:m (); scan_gen stream and scan_date_dot n m stream = match Stream.npeek 2 stream with | [ Dot; Number(l,p) ] -> stream_njunk 2 stream; if l=4 then add_data ~md:n ~mo:m ~y: p () else if l=2 then add_data ~md:n ~mo:m ~y2: p () else invalid(); scan_gen stream | _ -> add_data ~md:n ~mo:m (); scan_gen stream and scan_date_d (ln,n) stream = match Stream.npeek 3 stream with | [ Number(_,mo); Minus; Number(_,md) ] -> stream_njunk 3 stream; if ln=4 then add_data ~y:n ~mo ~md () else if ln=2 then add_data ~y2:n ~mo ~md () else invalid(); scan_gen stream | [ Month mo; Minus; Number(ly,y) ] -> stream_njunk 3 stream; if ly=4 then add_data ~y ~mo ~md:n () else if ly=2 then add_data ~y2:y ~mo ~md:n () else invalid(); scan_gen stream | _ -> invalid() and scan_date_m mo (lmd,md) stream = match Stream.npeek 2 stream with | [ Comma; Number(4,y) ] -> stream_njunk 2 stream; add_data ~y ~mo ~md (); scan_gen stream | _ -> add_data ~mo ~md (); scan_gen stream and scan_dst stream = match Stream.peek stream with | Some Dst -> Stream.junk stream; Some true | _ -> None and scan_opt_coma stream = match Stream.peek stream with | Some Comma -> Stream.junk stream; () | _ -> () and scan_opt_meridian stream = match Stream.peek stream with | Some (Meridian mdn) -> Stream.junk stream; Some mdn | _ -> None in (try scan_gen tokens; with | Stream.Error _ -> invalid() | Stream.Failure -> invalid() ); let may_get r = match !r with | None -> invalid() | Some r -> r in let get_default d r = match !r with | None -> d | Some r -> r in let month = may_get month in if month < 1 || month > 12 then invalid(); let date = { year = may_get year; month = month; day = may_get day; hour = get_default 0 hour; minute = get_default 0 minute; second = get_default 0 second; nanos = get_default 0 nanos; zone = get_default (match dzone with None -> 0 | Some z -> z) zone; week_day = get_default (-1) week_day } in if !zone=None && dzone=None && localzone then let tm = { Unix.tm_year = date.year - 1900; tm_mon = date.month - 1; tm_mday = date.day; tm_hour = date.hour; tm_min = date.minute; tm_sec = date.second; tm_wday = 0; tm_yday = 0; tm_isdst = false } in let (_,tm) = Unix.mktime tm in let zone = localzone_nodst + (if tm.Unix.tm_isdst then 60 else 0) in { date with zone = zone } else date ;; let months_start = [| 0; 31; 59; 90; 120; 151; 181; 212; 243; 273; 304; 334 |] ;; let is_leap year = year mod 4 = 0 && (year mod 100 <> 0 || year mod 400 = 0) ;; let since_epoch date = if date.month < 1 || date.month > 12 then invalid_arg "Netdate.since_epoch"; let in_day = float_of_int (date.hour * 3600 + (date.minute - date.zone) * 60 + date.second) in let days = date.year * 365 + (date.year + 3) / 4 - (date.year + 99) / 100 + (date.year + 399) / 400 - 719528 in let days = days + months_start.(date.month - 1) + date.day - 1 in let days = if is_leap date.year && date.month > 2 then days + 1 else days in 86400.0 *. (float_of_int days) +. in_day ;; let since_epoch_timespec date = (since_epoch date, date.nanos) let since_epoch_approx date = since_epoch date +. (float date.nanos) *. 1E-9 let parse_epoch ?l9n ?localzone ?zone str = since_epoch (parse ?l9n ?localzone ?zone str) ;; let parse_epoch_timespec ?l9n ?localzone ?zone str = since_epoch_timespec (parse ?l9n ?localzone ?zone str) ;; let parse_epoch_approx ?l9n ?localzone ?zone str = since_epoch_approx (parse ?l9n ?localzone ?zone str) ;; let billion = 1_000_000_000 let create ?(localzone=false) ?zone ?(nanos=0) time = (* Add nanos to time: *) let t0 = floor time in let ns0 = truncate ( (time -. t0) *. 1E9 ) in let ns1 = if ns0 >= billion - nanos then (nanos-billion)+ns0 else nanos+ns0 in let t1 = if ns0 >= billion - nanos then t0 +. 1.0 else t0 in let zone = match zone with | Some z -> z | None -> if localzone then get_localzone_at t1 else 0 in let t2 = t1 +. (float_of_int (zone * 60)) in let days = floor (t2 /. 86400.0) in let in_day = int_of_float (t2 -. 86400.0 *. days) in let days = days +. 719528.0 in let n400 = floor (days /. 146097.0) in let r400 = int_of_float (days -. n400 *. 146097.0) in let n400 = int_of_float n400 in let (n100, r100) = if r400 < 36525 then (0, r400) else ((r400 - 1) / 36524, (r400 - 1) mod 36524) in let (n4, r4) = if n100 = 0 then (r100 / 1461, r100 mod 1461) else if r100 < 1460 then (0, r100) else ((r100 + 1) / 1461, (r100 + 1) mod 1461) in let (n1, r1) = if n4 = 0 && n100 <> 0 then (r4 / 365, r4 mod 365) else if r4 < 366 then (0, r4) else ((r4 - 1) / 365, (r4 - 1) mod 365) in let year = 400 * n400 + 100 * n100 + 4 * n4 + n1 in let month_start = if is_leap year then fun m -> months_start.(m) + (if m > 1 then 1 else 0) else fun m -> months_start.(m) in let month_guess = r1 / 29 in let month = if month_guess = 12 then 11 else if r1 >= month_start month_guess then month_guess else month_guess - 1 in let second = in_day mod 60 and minutes = in_day / 60 in let minute = minutes mod 60 and hour = minutes / 60 in { year = year; month = month + 1; day = r1 - (month_start month) + 1; hour = hour; minute = minute; second = second; nanos = ns1; zone = zone; week_day = int_of_float (mod_float (days +. 6.0) 7.0) } ;; let week_day date = (* 0..6, relative to timezone *) if date.week_day = (-1) then let t1 = since_epoch date in let t2 = t1 +. (float_of_int (date.zone * 60)) in let days = floor (t2 /. 86400.0) in int_of_float (mod_float (days +. 4.0) 7.0) else date.week_day ;; let year_day date = (* 0..365, relative to timezone *) let is_leap_year = is_leap date.year in months_start.(date.month - 1) + (if date.month >= 3 && is_leap_year then 1 else 0) + date.day - 1 ;; let rec iso8601_week_pair date = let ( % ) a b = if a >= 0 then a mod b else a mod b + b in let d_wday = week_day date in let d_yday = year_day date in let wday_jan_1 = (* wday of jan 1 *) (d_wday - d_yday) % 7 in let shift = if wday_jan_1 = 1 then 7 else (wday_jan_1 - 1) % 7 in let offset = if wday_jan_1 >= 2 && wday_jan_1 <= 4 then 1 else 0 in let week = (d_yday + shift) / 7 + offset in if week = 0 then (* replace with last week of last year *) let date' = { date with year = date.year - 1; month = 12; day = 31; week_day = (-1) } in iso8601_week_pair date' else if week = 53 then (* only if dec 31 is a thu/fri/sat/sun *) let date' = { date with month = 12; day = 31; week_day = (-1) } in let d_wday' = week_day date' in if d_wday' >= 4 || d_wday' = 0 then (53, date.year) else (1, date.year+1) else (week, date.year) let rec format_to ?(l9n=c_posix_l9n) out_ch ~fmt date = let to_lower = to_lower l9n in let to_upper = to_upper l9n in let add_char c = out_ch#output_char c and add_string s = out_ch#output_string s in let fail () = invalid_arg "Netdate.format_to" in let add_digits w b n = if n >= b * 10 then fail (); let rec aux b n = add_char (char_of_int (48 + n / b)); if b >= 10 then aux (b / 10) (n mod b) in if w then ( let rec aux_spaces b = if n >= b || b < 10 then ( aux b n ) else ( add_char ' '; aux_spaces (b / 10) ) in aux_spaces b ) else ( aux b n ) in let wd_lz = lazy (week_day date) in let wd () = Lazy.force wd_lz in let yd_lz = lazy (year_day date) in let yd () = Lazy.force yd_lz in let wp_lz = lazy (iso8601_week_pair date) in let wp() = Lazy.force wp_lz in let rec do_format ?(have_colon=false) ?(precision=0) = function | 'a' -> add_string l9n.l9n.abbr_day_names.( wd() ) | 'A' -> add_string l9n.l9n.full_day_names.( wd() ) | 'b' | 'h' -> add_string l9n.l9n.abbr_month_names.(date.month - 1) | 'B' -> add_string l9n.l9n.full_month_names.(date.month - 1) | 'C' -> add_digits false 10 (date.year / 100) | 'd' -> add_digits false 10 date.day | 'e' -> add_digits true 10 date.day | 'g' -> add_digits false 10 (snd(wp()) mod 10) | 'G' -> add_digits false 1000 (snd(wp())) | 'H' -> add_digits false 10 date.hour | 'I' -> add_digits false 10 (match date.hour mod 12 with 0 -> 12 | d -> d) | 'j' -> add_digits false 100 (yd () + 1) | 'k' -> add_digits true 10 date.hour | 'l' -> add_digits true 10 (match date.hour mod 12 with 0 -> 12 | d -> d) | 'm' -> add_digits false 10 date.month | 'M' -> add_digits false 10 date.minute | 'n' -> add_char '\n' | 'p' -> add_string (if date.hour >= 12 then to_upper l9n.l9n.pm_particle else to_upper l9n.l9n.am_particle ) | 'P' -> add_string (if date.hour >= 12 then to_lower l9n.l9n.pm_particle else to_lower l9n.l9n.am_particle) | 's' -> add_string (string_of_float (since_epoch date)) | 'S' -> add_digits false 10 date.second; if precision > 0 then ( add_char '.'; add_string (sprintf "%0*d" precision (date.nanos / ten_power(9-precision))) ) | 't' -> add_char '\t' | 'u' -> add_digits false 1 (match wd () with 0 -> 7 | n -> n) | 'y' -> add_digits false 10 (date.year mod 100) | 'Y' -> add_digits false 1000 date.year | 'z' | 'Z' -> let (s, z) = if date.zone >= 0 then ('+', date.zone) else ('-', -date.zone) in add_char s; add_digits false 10 (z / 60); if have_colon then add_char ':'; add_digits false 10 (z mod 60) | 'U' -> add_digits false 10 ((yd () - wd () + 7) / 7) | 'V' -> add_digits false 10 (fst(wp())) | 'W' -> let wdm = if wd() = 0 then 6 else wd() - 1 in add_digits false 10 ((yd () - wdm + 7) / 7) | 'w' -> add_digits false 1 (wd ()) | '%' -> add_char '%' | 'c' -> format_to ~l9n out_ch ~fmt:l9n.l9n.d_t_format date | 'F' -> do_format 'Y'; add_char '-'; do_format 'm'; add_char '-'; do_format 'd' | 'x' -> format_to ~l9n out_ch ~fmt:l9n.l9n.d_format date | 'X' -> format_to ~l9n out_ch ~fmt:l9n.l9n.t_format date | 'D' -> do_format 'm'; add_char '/'; do_format 'd'; add_char '/'; do_format 'y' | 'r' -> format_to ~l9n out_ch ~fmt:l9n.l9n.t_format_ampm date | 'R' -> do_format 'H'; add_char ':'; do_format 'M' | 'T' -> do_format 'R'; add_char ':'; do_format 'S' | _ -> fail () in let l_fmt = String.length fmt in let rec aux i = if i = l_fmt then () else match fmt.[i] with | '%' when i = l_fmt - 1 -> fail () | '%' -> if fmt.[i + 1] = ':' then ( if i+2 >= l_fmt then fail(); do_format ~have_colon:true fmt.[i + 2]; aux (i + 3) ) else ( if fmt.[i + 1] = '.' then ( if i+3 >= l_fmt then fail(); match fmt.[i+2] with | '0'..'9' as c -> let d = Char.code c - 48 in do_format ~precision:d fmt.[i + 3]; aux (i + 4) | _ -> fail() ) else ( do_format fmt.[i + 1]; aux (i + 2) ) ) | c -> add_char c; aux (i + 1) in try aux 0 with _ -> fail () ;; let format ?l9n ~fmt date = let b = Buffer.create (String.length fmt * 2) in format_to ?l9n (new Netchannels.output_buffer b) ~fmt date; Buffer.contents b ;; (* The format routines above may want to support internationalization * in the future. The following must use the English conventions * described in the relevant RFCs. *) let mk_date ?localzone ?zone ?nanos ~fmt t = format ~fmt (create ?localzone ?zone ?nanos t) let mk_mail_date ?localzone ?zone t = format "%a, %d %b %Y %H:%M:%S %z" (create ?localzone ?zone t) ;; let mk_usenet_date ?localzone ?zone t = format "%A, %d-%b-%y %H:%M:%S %z" (create ?localzone ?zone t) ;; let mk_internet_date ?localzone ?zone ?(digits=0) t = if digits < 0 || digits > 9 then failwith "Netdate.mk_internet_date: digits out of bounds"; let fmt = sprintf "%%Y-%%m-%%dT%%H:%%M:%%.%dS%%:z" digits in format ~fmt (create ?localzone ?zone t) ;;
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