dysize(3) Library Functions Manual dysize(3) NAME dysize - get number of days for a given year LIBRARY Standard C library (libc, -lc) SYNOPSIS #include <time.h> int dysize(int year); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): dysize(): Since glibc 2.19: _DEFAULT_SOURCE glibc 2.19 and earlier: _BSD_SOURCE || _SVID_SOURCE DESCRIPTION The function returns 365 for a normal year and 366 for a leap year. The calculation for leap year is based on: (year) %4 == 0 && ((year) %100 != 0 || (year) %400 == 0) The formula is defined in the macro __isleap(year) also found in <time.h>. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │dysize() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS This function occurs in SunOS 4.x. NOTES This is a compatibility function only. Don't use it in new programs. SEE ALSO strftime(3) Linux man-pages 6.03 2023-02-05 dysize(3)
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