dysize(3)

1dysize(3)                  Library Functions Manual                  dysize(3)
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NAME

6       dysize - get number of days for a given year
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LIBRARY

9       Standard C library (libc, -lc)
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SYNOPSIS

12       #include <time.h>
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14       int dysize(int year);
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16   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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18       dysize():
19           Since glibc 2.19:
20               _DEFAULT_SOURCE
21           glibc 2.19 and earlier:
22               _BSD_SOURCE || _SVID_SOURCE
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DESCRIPTION

25       The  function  returns  365  for a normal year and 366 for a leap year.
26       The calculation for leap year is based on:
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28           (year) %4 == 0 && ((year) %100 != 0 || (year) %400 == 0)
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30       The formula is defined  in  the  macro  __isleap(year)  also  found  in
31       <time.h>.
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ATTRIBUTES

34       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
35       tributes(7).
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37       ┌────────────────────────────────────────────┬───────────────┬─────────┐
38       │Interface                                   │ Attribute     │ Value   │
39       ├────────────────────────────────────────────┼───────────────┼─────────┤
40       │dysize()                                    │ Thread safety │ MT-Safe │
41       └────────────────────────────────────────────┴───────────────┴─────────┘
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STANDARDS

44       None.
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HISTORY

47       SunOS 4.x.
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49       This is a compatibility function only.  Don't use it in new programs.
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