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subsurface/core/subsurface-time.h

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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
cleanup: const-ify utc_mktime() To make it clear that the struct tm is only used as an input parameter. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-11-01 20:44:30 +00:00
extern timestamp_t utc_mktime(const struct tm *tm);
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
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 monthname to time.c Weirdly, this function was declared in dive.h and defined in subsurface-startup.c. Let's move declaration and definition to more appropriate places, viz. subsurface-time.h and time.c. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-12-08 12:32:46 +00:00
extern const char *monthname(int mon);
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
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