From 8f6cd8b29062622095c489235061287f13e74dda Mon Sep 17 00:00:00 2001 From: Joey Castillo Date: Sat, 23 Oct 2021 16:13:11 -0400 Subject: move weekday lookup to new utilities file --- watch-library/watch/watch_utility.c | 35 +++++++++++++++++++++++++++++++ watch-library/watch/watch_utility.h | 41 +++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+) create mode 100644 watch-library/watch/watch_utility.c create mode 100644 watch-library/watch/watch_utility.h (limited to 'watch-library/watch') diff --git a/watch-library/watch/watch_utility.c b/watch-library/watch/watch_utility.c new file mode 100644 index 00000000..a0f361b4 --- /dev/null +++ b/watch-library/watch/watch_utility.c @@ -0,0 +1,35 @@ +/* + * MIT License + * + * Copyright (c) 2021 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "watch_utility.h" + +const char * watch_utility_get_weekday(watch_date_time date_time) { + static const char weekdays[7][3] = {"SA", "SU", "MO", "TU", "WE", "TH", "FR"}; + date_time.unit.year += 20; + if (date_time.unit.month <= 2) { + date_time.unit.month += 12; + date_time.unit.year--; + } + return weekdays[(date_time.unit.day + 13 * (date_time.unit.month + 1) / 5 + date_time.unit.year + date_time.unit.year / 4 + 525) % 7]; +} diff --git a/watch-library/watch/watch_utility.h b/watch-library/watch/watch_utility.h new file mode 100644 index 00000000..e8808923 --- /dev/null +++ b/watch-library/watch/watch_utility.h @@ -0,0 +1,41 @@ +/* + * MIT License + * + * Copyright (c) 2021 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef _WATCH_UTILITY_H_INCLUDED +#define _WATCH_UTILITY_H_INCLUDED +////< @file watch_utility.h + +#include "watch.h" + +/** @addtogroup utility Utility Functions + * @brief This section covers various useful functions that don't fit anywhere else. + **/ +/// @{ +/** @brief Returns a two-letter weekday for the given timestamp, suitable for display + * in positions 0-1 of the watch face + * @param date_time The watch_date_time whose weekday you want. + */ +const char * watch_utility_get_weekday(watch_date_time date_time); + +#endif -- cgit v1.2.3