2 * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License, version 2 only, as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 51
15 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 #include <common/time.h>
19 #include <common/error.h>
20 #include <common/macros.h>
21 #include <common/error.h>
30 static bool utf8_output_supported
;
33 bool locale_supports_utf8(void)
35 return utf8_output_supported
;
39 int timespec_to_ms(struct timespec ts
, unsigned long *ms
)
41 unsigned long res
, remain_ms
;
43 if (ts
.tv_sec
> ULONG_MAX
/ MSEC_PER_SEC
) {
45 return -1; /* multiplication overflow */
47 res
= ts
.tv_sec
* MSEC_PER_SEC
;
48 remain_ms
= ULONG_MAX
- res
;
49 if (ts
.tv_nsec
/ NSEC_PER_MSEC
> remain_ms
) {
51 return -1; /* addition overflow */
53 res
+= ts
.tv_nsec
/ NSEC_PER_MSEC
;
59 struct timespec
timespec_abs_diff(struct timespec t1
, struct timespec t2
)
61 uint64_t ts1
= (uint64_t) t1
.tv_sec
* (uint64_t) NSEC_PER_SEC
+
62 (uint64_t) t1
.tv_nsec
;
63 uint64_t ts2
= (uint64_t) t2
.tv_sec
* (uint64_t) NSEC_PER_SEC
+
64 (uint64_t) t2
.tv_nsec
;
65 uint64_t diff
= max(ts1
, ts2
) - min(ts1
, ts2
);
68 res
.tv_sec
= diff
/ (uint64_t) NSEC_PER_SEC
;
69 res
.tv_nsec
= diff
% (uint64_t) NSEC_PER_SEC
;
74 void __attribute__((constructor
)) init_locale_utf8_support(void)
76 const char *program_locale
= setlocale(LC_ALL
, NULL
);
77 const char *lang
= getenv("LANG");
79 if (program_locale
&& strstr(program_locale
, "utf8")) {
80 utf8_output_supported
= true;
81 } else if (lang
&& strstr(lang
, "utf8")) {
82 utf8_output_supported
= true;
87 int time_to_iso8601_str(time_t time
, char *str
, size_t len
)
94 if (len
< ISO8601_STR_LEN
) {
95 ERR("Buffer too short to format ISO 8601 timestamp: %zu bytes provided when at least %zu are needed",
96 len
, ISO8601_STR_LEN
);
101 tm_result
= localtime_r(&time
, &tm_storage
);
104 PERROR("Failed to break down timestamp to tm structure");
108 strf_ret
= strftime(str
, len
, "%Y%m%dT%H%M%S%z", tm_result
);
111 ERR("Failed to format timestamp as local time");
119 int time_to_datetime_str(time_t time
, char *str
, size_t len
)
122 struct tm
*tm_result
;
123 struct tm tm_storage
;
126 if (len
< DATETIME_STR_LEN
) {
127 ERR("Buffer too short to format to datetime: %zu bytes provided when at least %zu are needed",
128 len
, DATETIME_STR_LEN
);
133 tm_result
= localtime_r(&time
, &tm_storage
);
136 PERROR("Failed to break down timestamp to tm structure");
140 strf_ret
= strftime(str
, len
, "%Y%m%d-%H%M%S", tm_result
);
143 ERR("Failed to format timestamp as local time");
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