mifr/subsurface
1
0
Fork 0
mirror of https://github.com/subsurface/subsurface.git synced 2024-11-28 13:10:19 +00:00
Code Issues Projects Releases Packages Wiki Activity
subsurface/core/subsurface-time.h

26 lines
609 B
C
Raw Normal View History

cleanup: move declaration of utc_mk* functions to new subsurface-time.h header No point in slurping in all of dive.h for translation units that only want to do some time manipulation without ever touching a dive. Don't call the header "time.h", because we don't want to end up in a confusion with the system header of the same name. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-05-01 12:07:59 +00:00
// SPDX-License-Identifier: GPL-2.0
#ifndef TIME_H
#define TIME_H
#include "units.h"
#include <time.h>
#ifdef __cplusplus
extern "C" {
#endif
extern timestamp_t utc_mktime(struct tm *tm);
extern void utc_mkdate(timestamp_t, struct tm *tm);
core: add functions to core/time.c To support the new filter code, add helper functions that turn timestamps into year and day-of-week to core/time.c. Internally, these functions simply call utc_mktime() to break down the timestamp and then extract the wanted value. This may appear inefficient, but testing shows that modern compilers are quite effective in throwing away the unneeded calculations. FWIW in this respect clang10 outperformed gcc10. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-05-23 09:59:53 +00:00
extern int utc_year(timestamp_t timestamp);
extern int utc_weekday(timestamp_t timestamp);
cleanup: move declaration of utc_mk* functions to new subsurface-time.h header No point in slurping in all of dive.h for translation units that only want to do some time manipulation without ever touching a dive. Don't call the header "time.h", because we don't want to end up in a confusion with the system header of the same name. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-05-01 12:07:59 +00:00
core: add helper functions to format / parse timestamps To save datetime-based filter constraints to git or XML, it is preferrable to use human-readable representations. Therefore, add helper functions to format / parse timestamp_t 64-bit values in the "YYYY-MM-DD hh:mm:ss" format. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-08-27 05:10:33 +00:00
/* parse and format date times of the form YYYY-MM-DD hh:mm:ss */
extern timestamp_t parse_datetime(const char *s); /* returns 0 on error */
extern char *format_datetime(timestamp_t timestamp); /* ownership of string passed to caller */
cleanup: move declaration of utc_mk* functions to new subsurface-time.h header No point in slurping in all of dive.h for translation units that only want to do some time manipulation without ever touching a dive. Don't call the header "time.h", because we don't want to end up in a confusion with the system header of the same name. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-05-01 12:07:59 +00:00
#ifdef __cplusplus
}
#endif
#endif
Reference in a new issue Copy permalink