1 #define _XOPEN_SOURCE 700
2 #include <stdlib.h>
3 #include <stdio.h>
4 #include <time.h>
5 #include <string.h>
6 #include <errno.h>
7 #include <limits.h>
8 #include "test.h"
9
10 /* We use this instead of memcmp because some broken C libraries
11 * add additional nonstandard fields to struct tm... */
12
tm_cmp(struct tm tm1,struct tm tm2)13 int tm_cmp(struct tm tm1, struct tm tm2)
14 {
15 return tm1.tm_sec != tm2.tm_sec ||
16 tm1.tm_min != tm2.tm_min ||
17 tm1.tm_hour != tm2.tm_hour ||
18 tm1.tm_mday != tm2.tm_mday ||
19 tm1.tm_mon != tm2.tm_mon ||
20 tm1.tm_year != tm2.tm_year ||
21 tm1.tm_wday != tm2.tm_wday ||
22 tm1.tm_yday != tm2.tm_yday ||
23 tm1.tm_isdst!= tm2.tm_isdst;
24 }
25
tm_str(struct tm tm)26 char *tm_str(struct tm tm)
27 {
28 static int i;
29 static char b[4][64];
30 i = (i+1)%4;
31 snprintf(b[i], sizeof b[i],
32 "s=%02d m=%02d h=%02d mday=%02d mon=%02d year=%04d wday=%d yday=%d isdst=%d",
33 tm.tm_sec, tm.tm_min, tm.tm_hour,
34 tm.tm_mday, tm.tm_mon, tm.tm_year,
35 tm.tm_wday, tm.tm_yday, tm.tm_isdst);
36 return b[i];
37 }
38
39 #define TM(ss,mm,hh,md,mo,yr,wd,yd,dst) (struct tm){ \
40 .tm_sec = ss, .tm_min = mm, .tm_hour = hh, \
41 .tm_mday = md, .tm_mon = mo, .tm_year = yr, \
42 .tm_wday = wd, .tm_yday = yd, .tm_isdst = dst }
43
44 #define TM_EPOCH TM(0,0,0,1,0,70,4,0,0)
45 #define TM_Y2038_1S TM(7,14,3,19,0,138,2,18,0)
46 #define TM_Y2038 TM(8,14,3,19,0,138,2,18,0)
47
sec2tm(time_t t,char * m)48 static void sec2tm(time_t t, char *m)
49 {
50 struct tm *tm;
51 time_t r;
52
53 errno = 0;
54 tm = gmtime(&t);
55 if (errno != 0)
56 t_error("%s: gmtime((time_t)%lld) should not set errno, got %s\n",
57 m, (long long)t, strerror(errno));
58 errno = 0;
59 r = mktime(tm);
60 if (errno != 0)
61 t_error("%s: mktime(%s) should not set errno, got %s\n",
62 m, tm_str(*tm), strerror(errno));
63 if (t != r)
64 t_error("%s: mktime(gmtime(%lld)) roundtrip failed: got %lld (gmtime is %s)\n",
65 m, (long long)t, (long long)r, tm_str(*tm));
66 }
67
tm2sec(struct tm * tm,int big,char * m)68 static void tm2sec(struct tm *tm, int big, char *m)
69 {
70 struct tm *r;
71 time_t t;
72 int overflow = big && (time_t)LLONG_MAX!=LLONG_MAX;
73
74 errno = 0;
75 t = mktime(tm);
76 if (overflow && t != -1)
77 t_error("%s: mktime(%s) expected -1, got (time_t)%ld\n",
78 m, tm_str(*tm), (long)t);
79 if (overflow && errno != EOVERFLOW)
80 t_error("%s: mktime(%s) expected EOVERFLOW (%s), got (%s)\n",
81 m, tm_str(*tm), strerror(EOVERFLOW), strerror(errno));
82 if (!overflow && t == -1)
83 t_error("%s: mktime(%s) expected success, got (time_t)-1\n",
84 m, tm_str(*tm));
85 if (!overflow && errno)
86 t_error("%s: mktime(%s) expected no error, got (%s)\n",
87 m, tm_str(*tm), strerror(errno));
88 r = gmtime(&t);
89 if (!overflow && tm_cmp(*r, *tm))
90 t_error("%s: gmtime(mktime(%s)) roundtrip failed: got %s\n",
91 m, tm_str(*tm), tm_str(*r));
92 }
93
main(void)94 int main(void)
95 {
96 time_t t;
97
98 putenv("TZ=GMT");
99 tzset();
100 tm2sec(&TM_EPOCH, 0, "gmtime(0)");
101 tm2sec(&TM_Y2038_1S, 0, "2038-1s");
102 tm2sec(&TM_Y2038, 1, "2038");
103
104 sec2tm(0, "EPOCH");
105 for (t = 1; t < 1000; t++)
106 sec2tm(t*100003, "EPOCH+eps");
107
108 /* FIXME: set a TZ var and check DST boundary conditions */
109 return t_status;
110 }
111