a C library for zmanim and hebrew dates
make to build the library (shared and static) in the lib folder.
make test to build a test wrapper (in the test folder) to display the daily zmanim.
this creates a shared and static library that can be used by including the header files in
include and linking with
-lzmanim (you must add the library and headers to your
run window.bat in a VisualStudio command prompt to build
test.exe. This uses the OpenBSD stpncpy.
this library has a new struct
hdate which is like
struct tm used to store a date instance in the hebrew calendar.
one can initialize the members directly or use the
hdate convertDate(struct tm date) function to convert a gregorian date, along with other functions in
hebrewcalendar.c to manipulate it or get yomtov parshah etc.
for more documentation read the header files.
to format the date in hebrew use the functions in
one can then use this
hdate along with the
location struct (lat, long, elevation) in one of the getzmanim functions in
zmanim.h that return a
hdate with the correct zman.
for further examples see the test.c file that implements a basic wrapper to show daily zmanim
./test year month day latitude longitude timezone Eretz_Yisroel
./test 2018 12 18 40.66896 -73.94284 -4.0 0
י טבת תשע״ט
alos: 05:41 AM EST
misheyakir: 06:19 AM EST
sunrise: 07:14 AM EST
shma: 09:31 AM EST
tefila: 10:18 AM EST
chatzos: 11:52 AM EST
mincha gedola: 12:15 PM EST
mincha ketana: 02:37 PM EST
plag hamincha: 03:36 PM EST
sunset: 04:30 PM EST
tzais: 05:01 PM EST
note: due to the limitations of the C standard library all times will show as if they in the computers timezone even though they are correctly calculated in the given timezone.