Justin C. Miller
95a35cd0bf
Moving libc from its separate repo into this one, minor resulting build fixes, and a hacky way to add -I for libc headers in builds.
15 lines
433 B
C
15 lines
433 B
C
/* _PDCLIB_is_leap( int )
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This file is part of the Public Domain C Library (PDCLib).
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Permission is granted to use, modify, and / or redistribute at will.
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*/
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#include "j6libc/int.h"
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int _PDCLIB_is_leap( int year_offset )
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{
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/* year given as offset from 1900, matching tm.tm_year in <time.h> */
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long long year = year_offset + 1900ll;
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return ( ( year % 4 ) == 0 && ( ( year % 25 ) != 0 || ( year % 400 ) == 0 ) );
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}
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