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author | David Robillard <d@drobilla.net> | 2021-02-25 10:27:59 -0500 |
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committer | David Robillard <d@drobilla.net> | 2021-03-08 23:23:05 -0500 |
commit | c4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b (patch) | |
tree | a62995534f5f606ac2f8bae22d525532b824cb5e /subprojects/exess/src/date_utils.h | |
parent | 6bcd18ae60482790b645a345f718e7099250f261 (diff) | |
download | serd-c4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b.tar.gz serd-c4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b.tar.bz2 serd-c4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b.zip |
Add exess from git@gitlab.com:drobilla/exess.git 4638b1f
Diffstat (limited to 'subprojects/exess/src/date_utils.h')
-rw-r--r-- | subprojects/exess/src/date_utils.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/subprojects/exess/src/date_utils.h b/subprojects/exess/src/date_utils.h new file mode 100644 index 00000000..b864925e --- /dev/null +++ b/subprojects/exess/src/date_utils.h @@ -0,0 +1,65 @@ +/* + Copyright 2019-2021 David Robillard <d@drobilla.net> + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +#ifndef EXESS_DATE_UTILS_H +#define EXESS_DATE_UTILS_H + +#include "exess/exess.h" + +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> + +static inline bool +is_leap_year(const int64_t year) +{ + if (year % 4) { + return false; + } + + if (year % 100) { + return true; + } + + if (year % 400) { + return false; + } + + return true; +} + +static inline uint8_t +days_in_month(const int16_t year, const uint8_t month) +{ + return month == 2u ? (is_leap_year(year) ? 29u : 28u) + : (uint8_t)(30u + (month + (month / 8u)) % 2u); +} + +ExessResult +read_year_number(int16_t* out, const char* str); + +ExessResult +write_year_number(int16_t value, size_t buf_size, char* buf); + +/// Read YYYY-MM-DD date numbers without a timezone +ExessResult +read_date_numbers(ExessDate* out, const char* str); + +EXESS_CONST_FUNC +size_t +exess_timezone_string_length(ExessTimezone value); + +#endif // EXESS_DATE_UTILS_H |