blob: 5100b0492a6223b47ec5545cdc18467ec15e2c6f (
plain)
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
|
# Functions for converting date and time
#
# Copyright (C) 2019 Patrick McDermott
#
# This file is part of opkbuild.
#
# opkbuild is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# opkbuild is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with opkbuild. If not, see <http://www.gnu.org/licenses/>.
_ob_is_leap_year()
{
local year="${1}"
shift 1 || _ob_abort
return $((!(!(${year} % 4) && ${year} % 100 || !(${year} % 400))))
}
_ob_year_to_days()
{
local year="${1}"
shift 1 || _ob_abort
local y=1970
local d=0
# Simple but iterative.
while [ ${y} -ne ${year} ]; do
_ob_is_leap_year ${y} && : $((d += 366)) || : $((d += 365))
: $((y += 1))
done
printf '%d' ${d}
return 0
}
_ob_month_to_days()
{
local month="${1}"
local year="${2}"
shift 2 || _ob_abort
local d=
case ${month} in
1) d=0;; 2) d=31;; 3) d=59;; 4) d=90;;
5) d=120;; 6) d=151;; 7) d=181;; 8) d=212;;
9) d=243;; 10) d=273;; 11) d=304;; 12) d=334;;
13)d=365;;
esac
[ ${month} -ge 2 ] && _ob_is_leap_year ${year} && : $((++d))
printf '%d' ${d}
return 0
}
_ob_mktime()
{
local year="${1}"
local mon="${2}"
local mday="${3}"
local hour="${4}"
local min="${5}"
local sec="${6}"
local timezone="${7}"
shift 7 || _ob_abort
local d=
local t=
d=$(($(_ob_year_to_days ${year}) + $(_ob_month_to_days ${mon} ${year})))
d=$((${d} + ${mday} - 1))
t=$(( ( (${d} * 24 + ${hour}) * 60 + ${min}) * 60 + ${sec} ))
t=$((${t} - ${timezone}))
printf '%d' ${t}
return 0
}
_ob_mon_to_m()
{
local mon="${1}"
shift 1 || _ob_abort
local m=
case ${mon} in
Jan) m=1;; Feb) m=2;; Mar) m=3;; Apr) m=4;;
May) m=5;; Jun) m=6;; Jul) m=7;; Aug) m=8;;
Sep) m=9;; Oct) m=10;; Nov) m=11;; Dec) m=12;;
esac
printf '%d' ${m}
return 0
}
## @brief Convert a date and time into seconds since the Epoch
## @details \fBob_rfc822_mktime\fP() converts date and time formatted according
## to RFCs 822, 2822, and 5322 into non-leap seconds elapsed since the
## Epoch. It is similar to the C function \fBmktime\fP(3) except that
## it accepts a formatted string instead of a structure as its
## argument. It is intended to parse \fIchangelog\fP dates into a time
## value usable in the \fISOURCE_DATE_EPOCH\fP environment variable.
## @operand rfc822_tm req A date and time string formatted according to the
## \fIdate-time\fP symbol of RFC 5322 section 3.3.
## @return Returns 0.
## @stdout Prints the number of non-leap seconds elapsed since the Epoch.
## @pure yes This function has no side effects.
ob_rfc822_mktime()
{
local rfc822_tm="${1}"
shift 1 || _ob_abort
local wday=
local mday=
local mon=
local year=
local time=
local tz=
local hour=
local min=
local sec=
local tzsgn=
local tzhour=
local tzmin=
read wday mday mon year time tz <<-EOF
${rfc822_tm}
EOF
mon=$(_ob_mon_to_m ${mon})
IFS=':' read hour min sec <<-EOF
${time}
EOF
tzsgn="${tz%%[0-9]*}"; tzsgn="${tzsgn#+}"
tz=${tz#[+-]}; tz=${tz#0}; tz=${tz#0}
tzhour=$((${tz} / 100))
tzmin=$(( ${tz} % 100))
_ob_mktime ${year} ${mon} ${mday#0} ${hour#0} ${min#0} ${sec#0} \
$((${tzsgn}1 * (${tzhour} * 60 + ${tzmin}) * 60))
return 0
}
_ob_gmtime()
{
local timep="${1}"
shift 1 || _ob_abort
local sec=
local min=
local hour=
local days_in_year=
local year=1970
local mon=1
local mday=
sec=$((${timep} % 60)); : $((timep /= 60))
min=$((${timep} % 60)); : $((timep /= 60))
hour=$((${timep} % 24)); : $((timep /= 24))
while :; do
_ob_is_leap_year ${year} && days_in_year=366 || days_in_year=365
[ ${timep} -le ${days_in_year} ] && break
: $((timep -= ${days_in_year}))
: $((year += 1))
done
while [ ${timep} -ge $(_ob_month_to_days $((${mon} + 1)) ${year}) ]; do
: $((mon += 1))
done
mday=$((${timep} - $(_ob_month_to_days ${mon} ${year}) + 1))
printf '%d %d %d %d %d %d' \
${year} ${mon} ${mday} ${hour} ${min} ${sec}
return 0
}
## @brief Convert seconds since the Epoch into a date and time
## @details \fBob_iso8601_gmtime\fP() converts the number of non-leap seconds
## elapsed since the Epoch into date and time in UTC formatted
## according to ISO 8601. It is similar to the C function
## \fBgmtime\fP(3) except that it returns a formatted string instead of
## a structure. It is intended to generate a date and time usable with
## a POSIX-conformant \fBtouch\fP utility.
## @operand timep req The number of non-leap seconds elapsed since the Epoch.
## @return Returns 0.
## @stdout Prints the date and time in UTC formatted according to ISO 8601.
## @pure yes This function has no side effects.
ob_iso8601_gmtime()
{
local timep="${1}"
shift 1 || _ob_abort
printf '%04d-%02d-%02dT%02d:%02d:%02dZ' $(_ob_gmtime "${timep}")
return 0
}
## @brief Convert seconds since the Epoch into a date and time
## @details \fBob_touch_t_gmtime\fP() converts the number of non-leap seconds
## elapsed since the Epoch into date and time in UTC formatted for the
## \fB-t\fP option of the \fBtouch\fP utility according to POSIX. It
## is similar to the C function \fBgmtime\fP(3) except that it returns
## a formatted string instead of a structure.
## @operand timep req The number of non-leap seconds elapsed since the Epoch.
## @return Returns 0.
## @stdout Prints the date and time in UTC formatted for the \fBtouch\fP
## utility's \fB-t\fP option.
## @pure yes This function has no side effects.
ob_touch_t_gmtime()
{
local timep="${1}"
shift 1 || _ob_abort
# [[CC]YY]MMDDhhmm[.SS]
printf '%04d%02d%02d%02d%02d.%02d' $(_ob_gmtime "${timep}")
return 0
}
|
