dysize

Section: C Library Functions (3)
Updated: 2023-02-05
Index Return to Main Contents
 

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 attributes(7).
InterfaceAttributeValue
dysize() Thread safetyMT-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)

 

Index

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
ATTRIBUTES
STANDARDS
NOTES
SEE ALSO
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Time: 07:52:12 GMT, April 20, 2024