37 lines
757 B
C
37 lines
757 B
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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/*
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* floor and ceil-- greatest integer <= arg
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* (resp least >=)
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*/
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double
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jehanne_floor(double d)
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{
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double fract;
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if(d < 0) {
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fract = jehanne_modf(-d, &d);
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if(fract != 0.0)
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d += 1;
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d = -d;
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} else
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jehanne_modf(d, &d);
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return d;
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}
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double
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jehanne_ceil(double d)
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{
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return -jehanne_floor(-d);
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}
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