1 /*-
2 * Copyright (c) 2008 Christos Zoulas
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
16 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 */
26 #include "php.h"
27
28 #include "file.h"
29
30 #ifndef lint
31 FILE_RCSID("@(#)$File: cdf_time.c,v 1.19 2019/03/12 20:43:05 christos Exp $")
32 #endif
33
34 #include <time.h>
35 #ifdef TEST
36 #include <err.h>
37 #endif
38 #include <string.h>
39
40 #include "cdf.h"
41
42 #define isleap(y) ((((y) % 4) == 0) && \
43 ((((y) % 100) != 0) || (((y) % 400) == 0)))
44
45 static const int mdays[] = {
46 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
47 };
48
49 /*
50 * Return the number of days between jan 01 1601 and jan 01 of year.
51 */
52 static int
cdf_getdays(int year)53 cdf_getdays(int year)
54 {
55 int days = 0;
56 int y;
57
58 for (y = CDF_BASE_YEAR; y < year; y++)
59 days += isleap(y) + 365;
60
61 return days;
62 }
63
64 /*
65 * Return the day within the month
66 */
67 static int
cdf_getday(int year,int days)68 cdf_getday(int year, int days)
69 {
70 size_t m;
71
72 for (m = 0; m < __arraycount(mdays); m++) {
73 int sub = mdays[m] + (m == 1 && isleap(year));
74 if (days < sub)
75 return days;
76 days -= sub;
77 }
78 return days;
79 }
80
81 /*
82 * Return the 0...11 month number.
83 */
84 static int
cdf_getmonth(int year,int days)85 cdf_getmonth(int year, int days)
86 {
87 size_t m;
88
89 for (m = 0; m < __arraycount(mdays); m++) {
90 days -= mdays[m];
91 if (m == 1 && isleap(year))
92 days--;
93 if (days <= 0)
94 return CAST(int, m);
95 }
96 return CAST(int, m);
97 }
98
99 int
cdf_timestamp_to_timespec(struct timespec * ts,cdf_timestamp_t t)100 cdf_timestamp_to_timespec(struct timespec *ts, cdf_timestamp_t t)
101 {
102 struct tm tm;
103 #ifdef HAVE_STRUCT_TM_TM_ZONE
104 static char UTC[] = "UTC";
105 #endif
106 int rdays;
107
108 /* Unit is 100's of nanoseconds */
109 ts->tv_nsec = (t % CDF_TIME_PREC) * 100;
110
111 t /= CDF_TIME_PREC;
112 tm.tm_sec = CAST(int, t % 60);
113 t /= 60;
114
115 tm.tm_min = CAST(int, t % 60);
116 t /= 60;
117
118 tm.tm_hour = CAST(int, t % 24);
119 t /= 24;
120
121 /* XXX: Approx */
122 tm.tm_year = CAST(int, CDF_BASE_YEAR + (t / 365));
123
124 rdays = cdf_getdays(tm.tm_year);
125 t -= rdays - 1;
126 tm.tm_mday = cdf_getday(tm.tm_year, CAST(int, t));
127 tm.tm_mon = cdf_getmonth(tm.tm_year, CAST(int, t));
128 tm.tm_wday = 0;
129 tm.tm_yday = 0;
130 tm.tm_isdst = 0;
131 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
132 tm.tm_gmtoff = 0;
133 #endif
134 #ifdef HAVE_STRUCT_TM_TM_ZONE
135 tm.tm_zone = UTC;
136 #endif
137 tm.tm_year -= 1900;
138 ts->tv_sec = mktime(&tm);
139 if (ts->tv_sec == -1) {
140 errno = EINVAL;
141 return -1;
142 }
143 return 0;
144 }
145
146 int
147 /*ARGSUSED*/
cdf_timespec_to_timestamp(cdf_timestamp_t * t,const struct timespec * ts)148 cdf_timespec_to_timestamp(cdf_timestamp_t *t, const struct timespec *ts)
149 {
150 #ifndef __lint__
151 (void)&t;
152 (void)&ts;
153 #endif
154 #ifdef notyet
155 struct tm tm;
156 if (php_gmtime_r(&ts->ts_sec, &tm) == NULL) {
157 errno = EINVAL;
158 return -1;
159 }
160 *t = (ts->ts_nsec / 100) * CDF_TIME_PREC;
161 *t = tm.tm_sec;
162 *t += tm.tm_min * 60;
163 *t += tm.tm_hour * 60 * 60;
164 *t += tm.tm_mday * 60 * 60 * 24;
165 #endif
166 return 0;
167 }
168
169 char *
cdf_ctime(const time_t * sec,char * buf)170 cdf_ctime(const time_t *sec, char *buf)
171 {
172 char *ptr = php_ctime_r(sec, buf);
173 if (ptr != NULL)
174 return buf;
175 (void)snprintf(buf, 26, "*Bad* %#16.16" INT64_T_FORMAT "x\n",
176 CAST(long long, *sec));
177 return buf;
178 }
179
180
181 #ifdef TEST_TIME
182 int
main(int argc,char * argv[])183 main(int argc, char *argv[])
184 {
185 struct timespec ts;
186 char buf[25];
187 static const cdf_timestamp_t tst = 0x01A5E403C2D59C00ULL;
188 static const char *ref = "Sat Apr 23 01:30:00 1977";
189 char *p, *q;
190
191 cdf_timestamp_to_timespec(&ts, tst);
192 p = cdf_ctime(&ts.tv_sec, buf);
193 if ((q = strchr(p, '\n')) != NULL)
194 *q = '\0';
195 if (strcmp(ref, p) != 0)
196 errx(1, "Error date %s != %s\n", ref, p);
197 return 0;
198 }
199 #endif
200
