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40 lines
987 B
40 lines
987 B
/************************************************************************ |
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* lib/math/lib_round.c |
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* |
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* This file is a part of NuttX: |
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* |
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* Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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* (C) 2012 Petteri Aimonen <jpa@nx.mail.kapsi.fi> |
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* |
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************************************************************************/ |
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/************************************************************************ |
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* Included Files |
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************************************************************************/ |
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#include <nuttx/config.h> |
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#include <nuttx/compiler.h> |
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#include <math.h> |
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/************************************************************************ |
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* Public Functions |
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************************************************************************/ |
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#ifdef CONFIG_HAVE_LONG_DOUBLE |
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long double roundl(long double x) |
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{ |
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long double f = modfl(x, &x); |
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if (x <= 0.0 && f <= -0.5) |
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{ |
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x -= 1.0; |
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} |
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if (x >= 0.0 && f >= 0.5) |
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{ |
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x += 1.0; |
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} |
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return x; |
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} |
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#endif
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