1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
#![warn(missing_docs)]
extern crate time;
#[cfg(windows)] extern crate kernel32;
#[cfg(windows)] extern crate winapi;
use std::io;
use time::Tm;
#[derive(Copy, Clone, Debug)]
pub struct MsDosDateTime {
pub datepart: u16,
pub timepart: u16,
}
impl MsDosDateTime {
pub fn new(time: u16, date: u16) -> MsDosDateTime {
MsDosDateTime {
datepart: date,
timepart: time,
}
}
}
pub trait TmMsDosExt : Sized {
fn to_msdos(&self) -> Result<MsDosDateTime, io::Error>;
fn from_msdos(MsDosDateTime) -> Result<Self, io::Error>;
}
impl TmMsDosExt for Tm {
fn to_msdos(&self) -> Result<MsDosDateTime, io::Error> {
sys::tm_to_msdos(self)
}
fn from_msdos(ms: MsDosDateTime) -> Result<Self, io::Error> {
sys::msdos_to_tm(ms)
}
}
#[cfg(not(windows))]
mod sys {
use super::MsDosDateTime;
use time::{self, Tm};
use std::io;
pub fn msdos_to_tm(ms: MsDosDateTime) -> Result<Tm, io::Error> {
let seconds = (ms.timepart & 0b0000000000011111) << 1;
let minutes = (ms.timepart & 0b0000011111100000) >> 5;
let hours = (ms.timepart & 0b1111100000000000) >> 11;
let days = (ms.datepart & 0b0000000000011111) >> 0;
let months = (ms.datepart & 0b0000000111100000) >> 5;
let years = (ms.datepart & 0b1111111000000000) >> 9;
let tm = Tm {
tm_sec: seconds as i32,
tm_min: minutes as i32,
tm_hour: hours as i32,
tm_mday: days as i32,
tm_mon: months as i32 - 1,
tm_year: years as i32 + 80,
..time::empty_tm()
};
Ok(time::at_utc(tm.to_timespec()))
}
pub fn tm_to_msdos(tm: &Tm) -> Result<MsDosDateTime, io::Error> {
let timepart = ((tm.tm_sec >> 1) | (tm.tm_min << 5) | (tm.tm_hour << 11)) as u16;
let datepart = (tm.tm_mday | ((tm.tm_mon + 1) << 5) | ((tm.tm_year - 80) << 9)) as u16;
Ok(MsDosDateTime { datepart: datepart, timepart: timepart })
}
}
#[cfg(windows)]
mod sys {
use super::MsDosDateTime;
use time::{self, Tm};
use winapi::*;
use kernel32::*;
use std::io;
pub fn msdos_to_tm(ms: MsDosDateTime) -> Result<Tm, io::Error> {
let datepart: WORD = ms.datepart;
let timepart: WORD = ms.timepart;
let mut filetime: FILETIME = unsafe { ::std::mem::zeroed() };
let mut systemtime: SYSTEMTIME = unsafe { ::std::mem::zeroed() };
if unsafe { DosDateTimeToFileTime(datepart, timepart, &mut filetime) } == 0 {
return Err(io::Error::last_os_error());
}
if unsafe { FileTimeToSystemTime(&filetime, &mut systemtime) } == 0 {
return Err(io::Error::last_os_error());
}
Ok(Tm {
tm_sec: systemtime.wSecond as i32,
tm_min: systemtime.wMinute as i32,
tm_hour: systemtime.wHour as i32,
tm_mday: systemtime.wDay as i32,
tm_wday: systemtime.wDayOfWeek as i32,
tm_mon: (systemtime.wMonth - 1) as i32,
tm_year: (systemtime.wYear - 1900) as i32,
..time::empty_tm()
})
}
pub fn tm_to_msdos(tm: &Tm) -> Result<MsDosDateTime, io::Error> {
let systemtime = SYSTEMTIME {
wYear: (tm.tm_year + 1900) as WORD,
wMonth: (tm.tm_mon + 1) as WORD,
wDayOfWeek: tm.tm_wday as WORD,
wDay: tm.tm_mday as WORD,
wHour: tm.tm_hour as WORD,
wMinute: tm.tm_min as WORD,
wSecond: tm.tm_sec as WORD,
wMilliseconds: 0,
};
let mut filetime = unsafe { ::std::mem::zeroed() };
let mut datepart : WORD = 0;
let mut timepart : WORD = 0;
if unsafe { SystemTimeToFileTime(&systemtime, &mut filetime) } == 0 {
return Err(io::Error::last_os_error());
}
if unsafe { FileTimeToDosDateTime(&filetime, &mut datepart, &mut timepart) } == 0 {
return Err(io::Error::last_os_error());
}
Ok(MsDosDateTime { datepart: datepart, timepart: timepart })
}
}
#[cfg(test)]
mod test {
use super::*;
use time::{self, Tm};
fn check_date(input: Tm, day: i32, month: i32, year: i32) {
assert_eq!(input.tm_mday, day);
assert_eq!(input.tm_mon + 1, month);
assert_eq!(input.tm_year + 1900, year);
}
fn check_time(input: Tm, hour: i32, minute: i32, second: i32) {
assert_eq!(input.tm_hour, hour);
assert_eq!(input.tm_min, minute);
assert_eq!(input.tm_sec, second);
}
#[test]
fn dos_zero() {
let _ = Tm::from_msdos(MsDosDateTime::new(0, 0));
}
#[test]
fn dos_smallest() {
let tm = Tm::from_msdos(MsDosDateTime::new(0, 0b100001)).unwrap();
check_date(tm, 1, 1, 1980);
check_time(tm, 0, 0, 0);
}
#[test]
fn dos_today() {
let tm = Tm::from_msdos(MsDosDateTime::new(0b01001_100000_10101, 0b0100011_0110_11110)).unwrap();
check_date(tm, 30, 6, 2015);
check_time(tm, 9, 32, 42);
}
#[test]
fn zero_dos() {
let tm = Tm {
tm_year: 80,
tm_mon: 0,
tm_mday: 1,
tm_hour: 0,
tm_min: 0,
tm_sec: 0,
..time::empty_tm()
};
let ms = tm.to_msdos().unwrap();
assert_eq!(ms.datepart, 0b100001);
assert_eq!(ms.timepart, 0);
}
#[test]
fn today_dos() {
let tm = Tm {
tm_year: 115,
tm_mon: 5,
tm_mday: 30,
tm_hour: 9,
tm_min: 32,
tm_sec: 42,
..time::empty_tm()
};
let ms = tm.to_msdos().unwrap();
assert_eq!(ms.datepart, 0b0100011_0110_11110);
assert_eq!(ms.timepart, 0b01001_100000_10101);
}
}