NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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dysize(3) Library Functions Manual dysize(3)
dysize - get number of days for a given year
Standard C library (libc, -lc)
#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
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>.
For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────────────────┬───────────────┬─────────┐ │ Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼─────────┤ │ dysize() │ Thread safety │ MT-Safe │ └─────────────────────────────────────┴───────────────┴─────────┘
None.
SunOS 4.x. This is a compatibility function only. Don't use it in new programs.
strftime(3)
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Linux man-pages 6.9.1 2024-05-02 dysize(3)