1 // SPDX-License-Identifier: MIT
2
3 #define _GNU_SOURCE /* For tm_gmtoff */
4 #include <stddef.h>
5 #include <stdlib.h>
6 #include <string.h>
7 #include <time.h>
8 #include "test.h"
9
10 /**
11 * checkStrptime - parse time and check if it matches expected value
12 *
13 * This function compares time and date fields of tm structure only.
14 * It's because tm_wday and tm_yday may - but don't have to - be set
15 * while parsing a date.
16 */
checkStrptime(const char * s,const char * format,const struct tm * expected)17 static void checkStrptime(const char *s, const char *format, const struct tm *expected) {
18 struct tm tm = { };
19 const char *ret;
20
21 ret = strptime(s, format, &tm);
22 if (!ret || *ret != '\0') {
23 t_error("\"%s\": failed to parse \"%s\"\n", format, s);
24 } else if (tm.tm_sec != expected->tm_sec ||
25 tm.tm_min != expected->tm_min ||
26 tm.tm_hour != expected->tm_hour ||
27 tm.tm_mday != expected->tm_mday ||
28 tm.tm_mon != expected->tm_mon ||
29 tm.tm_year != expected->tm_year) {
30 char buf1[64];
31 char buf2[64];
32
33 strftime(buf1, sizeof(buf1), "%FT%H:%M:%S%Z", expected);
34 strftime(buf2, sizeof(buf2), "%FT%H:%M:%S%Z", &tm);
35
36 t_error("\"%s\": for \"%s\" expected %s but got %s\n", format, s, buf1, buf2);
37 }
38 }
39
checkStrptimeTz(const char * s,int h,int m)40 static void checkStrptimeTz(const char *s, int h, int m) {
41 long int expected = h * 3600 + m * 60;
42 struct tm tm = { };
43 const char *ret;
44
45 ret = strptime(s, "%z", &tm);
46 if (!ret || *ret != '\0') {
47 t_error("\"%%z\": failed to parse \"%s\"\n", s);
48 } else if (tm.tm_gmtoff != expected) {
49 t_error("\"%%z\": for \"%s\" expected tm_gmtoff %ld but got %ld\n", s, tm.tm_gmtoff, expected);
50 }
51 }
52
53 static struct tm tm1 = {
54 .tm_sec = 8,
55 .tm_min = 57,
56 .tm_hour = 20,
57 .tm_mday = 0,
58 .tm_mon = 0,
59 .tm_year = 0,
60 };
61
62 static struct tm tm2 = {
63 .tm_sec = 0,
64 .tm_min = 0,
65 .tm_hour = 0,
66 .tm_mday = 25,
67 .tm_mon = 8 - 1,
68 .tm_year = 1991 - 1900,
69 };
70
71 static struct tm tm3 = {
72 .tm_sec = 0,
73 .tm_min = 0,
74 .tm_hour = 0,
75 .tm_mday = 21,
76 .tm_mon = 10 - 1,
77 .tm_year = 2015 - 1900,
78 };
79
80 static struct tm tm4 = {
81 .tm_sec = 0,
82 .tm_min = 0,
83 .tm_hour = 0,
84 .tm_mday = 10,
85 .tm_mon = 7 - 1,
86 .tm_year = 1856 - 1900,
87 };
88
main()89 int main() {
90 setenv("TZ", "UTC0", 1);
91
92 /* Time */
93 checkStrptime("20:57:08", "%H:%M:%S", &tm1);
94 checkStrptime("20:57:8", "%R:%S", &tm1);
95 checkStrptime("20:57:08", "%T", &tm1);
96
97 /* Format */
98 checkStrptime("20:57:08", "%H : %M : %S", &tm1);
99 checkStrptime("20 57 08", "%H %M %S", &tm1);
100 checkStrptime("20%57%08", "%H %% %M%%%S", &tm1);
101 checkStrptime("foo20bar57qux08 ", "foo %Hbar %M qux%S ", &tm1);
102
103 /* Date */
104 checkStrptime("1991-08-25", "%Y-%m-%d", &tm2);
105 checkStrptime("25.08.91", "%d.%m.%y", &tm2);
106 checkStrptime("08/25/91", "%D", &tm2);
107 checkStrptime("21.10.15", "%d.%m.%y", &tm3);
108 checkStrptime("10.7.56 in 18th", "%d.%m.%y in %C th", &tm4);
109
110 /* Glibc */
111 checkStrptime("1856-07-10", "%F", &tm4);
112 checkStrptime("683078400", "%s", &tm2);
113 checkStrptimeTz("+0200", 2, 0);
114 checkStrptimeTz("-0530", -5, -30);
115 checkStrptimeTz("-06", -6, 0);
116
117 return t_status;
118 }
119