1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11 use super::Tm;
12
time_to_tm(ts: i64, tm: &mut Tm)13 fn time_to_tm(ts: i64, tm: &mut Tm) {
14 let leapyear = |year| -> bool { year % 4 == 0 && (year % 100 != 0 || year % 400 == 0) };
15
16 static YTAB: [[i64; 12]; 2] = [
17 [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
18 [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
19 ];
20
21 let mut year = 1970;
22
23 let dayclock = ts % 86400;
24 let mut dayno = ts / 86400;
25
26 tm.tm_sec = (dayclock % 60) as i32;
27 tm.tm_min = ((dayclock % 3600) / 60) as i32;
28 tm.tm_hour = (dayclock / 3600) as i32;
29 tm.tm_wday = ((dayno + 4) % 7) as i32;
30 loop {
31 let yearsize = if leapyear(year) { 366 } else { 365 };
32 if dayno >= yearsize {
33 dayno -= yearsize;
34 year += 1;
35 } else {
36 break;
37 }
38 }
39 tm.tm_year = (year - 1900) as i32;
40 tm.tm_yday = dayno as i32;
41 let mut mon = 0;
42 while dayno >= YTAB[if leapyear(year) { 1 } else { 0 }][mon] {
43 dayno -= YTAB[if leapyear(year) { 1 } else { 0 }][mon];
44 mon += 1;
45 }
46 tm.tm_mon = mon as i32;
47 tm.tm_mday = dayno as i32 + 1;
48 tm.tm_isdst = 0;
49 }
50
tm_to_time(tm: &Tm) -> i6451 fn tm_to_time(tm: &Tm) -> i64 {
52 let mut y = tm.tm_year as i64 + 1900;
53 let mut m = tm.tm_mon as i64 + 1;
54 if m <= 2 {
55 y -= 1;
56 m += 12;
57 }
58 let d = tm.tm_mday as i64;
59 let h = tm.tm_hour as i64;
60 let mi = tm.tm_min as i64;
61 let s = tm.tm_sec as i64;
62 (365 * y + y / 4 - y / 100 + y / 400 + 3 * (m + 1) / 5 + 30 * m + d - 719561) * 86400
63 + 3600 * h
64 + 60 * mi
65 + s
66 }
67
time_to_local_tm(sec: i64, tm: &mut Tm)68 pub fn time_to_local_tm(sec: i64, tm: &mut Tm) {
69 // FIXME: Add timezone logic
70 time_to_tm(sec, tm);
71 }
72
utc_tm_to_time(tm: &Tm) -> i6473 pub fn utc_tm_to_time(tm: &Tm) -> i64 {
74 tm_to_time(tm)
75 }
76
local_tm_to_time(tm: &Tm) -> i6477 pub fn local_tm_to_time(tm: &Tm) -> i64 {
78 // FIXME: Add timezone logic
79 tm_to_time(tm)
80 }
81