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39 lines
812 B
C
39 lines
812 B
C
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#include <math.h>
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#include <limits.h>
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#include <errno.h>
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long long
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llround (double x)
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{
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double res;
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if (x >= 0.0)
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{
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res = ceil (x);
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if (res - x > 0.5)
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res -= 1.0;
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}
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else
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{
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res = ceil (-x);
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if (res + x > 0.5)
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res -= 1.0;
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res = -res;
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}
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if (!isfinite (res)
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|| res > (double) LONG_LONG_MAX
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|| res < (double) LONG_LONG_MIN)
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{
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errno = ERANGE;
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/* Undefined behaviour, so we could return anything. */
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/* return res > 0.0 ? LONG_LONG_MAX : LONG_LONG_MIN; */
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}
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return (long long) res;
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}
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