Annotation of embedaddon/php/ext/fileinfo/libmagic/cdf_time.c, revision 1.1.1.3
1.1 misho 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:
27: #include "file.h"
28:
29: #ifndef lint
1.1.1.3 ! misho 30: FILE_RCSID("@(#)$File: cdf_time.c,v 1.12 2012/05/15 17:14:36 christos Exp $")
1.1 misho 31: #endif
32:
33: #include <time.h>
34: #ifdef TEST
35: #include <err.h>
36: #endif
37: #include <string.h>
38:
39: #include "cdf.h"
40:
41: #define isleap(y) ((((y) % 4) == 0) && \
42: ((((y) % 100) != 0) || (((y) % 400) == 0)))
43:
44: static const int mdays[] = {
45: 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
46: };
47:
48: /*
49: * Return the number of days between jan 01 1601 and jan 01 of year.
50: */
51: static int
52: cdf_getdays(int year)
53: {
54: int days = 0;
55: int y;
56:
57: for (y = CDF_BASE_YEAR; y < year; y++)
58: days += isleap(y) + 365;
59:
60: return days;
61: }
62:
63: /*
64: * Return the day within the month
65: */
66: static int
67: cdf_getday(int year, int days)
68: {
69: size_t m;
70:
71: for (m = 0; m < sizeof(mdays) / sizeof(mdays[0]); m++) {
72: int sub = mdays[m] + (m == 1 && isleap(year));
73: if (days < sub)
74: return days;
75: days -= sub;
76: }
77: return days;
78: }
79:
80: /*
81: * Return the 0...11 month number.
82: */
83: static int
84: cdf_getmonth(int year, int days)
85: {
86: size_t m;
87:
88: for (m = 0; m < sizeof(mdays) / sizeof(mdays[0]); m++) {
89: days -= mdays[m];
90: if (m == 1 && isleap(year))
91: days--;
92: if (days <= 0)
93: return (int)m;
94: }
95: return (int)m;
96: }
97:
98: int
99: cdf_timestamp_to_timespec(struct timeval *ts, cdf_timestamp_t t)
100: {
101: struct tm tm;
102: #ifdef HAVE_STRUCT_TM_TM_ZONE
103: static char UTC[] = "UTC";
104: #endif
105: int rdays;
106:
1.1.1.3 ! misho 107: /* XXX 5.14 at least introdced 100 ns intervals, this is to do */
1.1 misho 108: /* Time interval, in microseconds */
109: ts->tv_usec = (t % CDF_TIME_PREC) * CDF_TIME_PREC;
110:
111: t /= CDF_TIME_PREC;
1.1.1.2 misho 112: tm.tm_sec = (int)(t % 60);
1.1 misho 113: t /= 60;
114:
1.1.1.2 misho 115: tm.tm_min = (int)(t % 60);
1.1 misho 116: t /= 60;
117:
1.1.1.2 misho 118: tm.tm_hour = (int)(t % 24);
1.1 misho 119: t /= 24;
120:
121: /* XXX: Approx */
1.1.1.2 misho 122: tm.tm_year = (int)(CDF_BASE_YEAR + (t / 365));
1.1 misho 123:
124: rdays = cdf_getdays(tm.tm_year);
1.1.1.2 misho 125: t -= rdays - 1;
126: tm.tm_mday = cdf_getday(tm.tm_year, (int)t);
127: tm.tm_mon = cdf_getmonth(tm.tm_year, (int)t);
1.1 misho 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
1.1.1.2 misho 147: /*ARGSUSED*/
1.1 misho 148: cdf_timespec_to_timestamp(cdf_timestamp_t *t, const struct timeval *ts)
149: {
1.1.1.2 misho 150: #ifndef __lint__
1.1 misho 151: (void)&t;
152: (void)&ts;
1.1.1.2 misho 153: #endif
1.1 misho 154: #ifdef notyet
155: struct tm tm;
156: if (gmtime_r(&ts->ts_sec, &tm) == NULL) {
157: errno = EINVAL;
158: return -1;
159: }
160: *t = (ts->ts_usec / CDF_TIME_PREC) * 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:
1.1.1.2 misho 169: char *
1.1.1.3 ! misho 170: cdf_ctime(const time_t *sec, char *buf)
1.1.1.2 misho 171: {
1.1.1.3 ! misho 172: char *ptr = ctime_r(sec, buf);
1.1.1.2 misho 173: if (ptr != NULL)
1.1.1.3 ! misho 174: return buf;
! 175: (void)snprintf(buf, 26, "*Bad* 0x%16.16llx\n", (long long)*sec);
! 176: return buf;
1.1.1.2 misho 177: }
178:
1.1 misho 179:
180: #ifdef TEST
181: int
182: main(int argc, char *argv[])
183: {
184: struct timeval ts;
1.1.1.3 ! misho 185: char buf[25];
1.1 misho 186: static const cdf_timestamp_t tst = 0x01A5E403C2D59C00ULL;
187: static const char *ref = "Sat Apr 23 01:30:00 1977";
188: char *p, *q;
189:
190: cdf_timestamp_to_timespec(&ts, tst);
1.1.1.3 ! misho 191: p = cdf_ctime(&ts.tv_sec, buf);
1.1 misho 192: if ((q = strchr(p, '\n')) != NULL)
193: *q = '\0';
194: if (strcmp(ref, p) != 0)
195: errx(1, "Error date %s != %s\n", ref, p);
196: return 0;
197: }
198: #endif
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