/usr/include/birnet/birnetmath.hh is in libbse-dev 0.7.8-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | // Licensed GNU LGPL v2.1 or later: http://www.gnu.org/licenses/lgpl.html
#ifndef __BIRNET_MATH_HH__
#define __BIRNET_MATH_HH__
#include <birnet/birnetutils.hh>
#include <math.h>
namespace Birnet {
/* --- double to integer --- */
inline int dtoi32 (double d) BIRNET_CONST;
inline int64 dtoi64 (double d) BIRNET_CONST;
inline int64 iround (double d) BIRNET_CONST;
inline int64 ifloor (double d) BIRNET_CONST;
inline int64 iceil (double d) BIRNET_CONST;
/* --- implementation bits --- */
inline int BIRNET_CONST
_dtoi32_generic (double d)
{
/* this relies on the C++ behaviour of round-to-0 */
return (int) (d < -0.0 ? d - 0.5 : d + 0.5);
}
inline int BIRNET_CONST
dtoi32 (double d)
{
/* this relies on the hardware default round-to-nearest */
#if defined __i386__ && defined __GNUC__
int r;
__asm__ volatile ("fistl %0"
: "=m" (r)
: "t" (d));
return r;
#endif
return _dtoi32_generic (d);
}
inline int64 BIRNET_CONST
_dtoi64_generic (double d)
{
/* this relies on the C++ behaviour of round-to-0 */
return (int64) (d < -0.0 ? d - 0.5 : d + 0.5);
}
inline int64 BIRNET_CONST
dtoi64 (double d)
{
/* this relies on the hardware default round-to-nearest */
#if defined __i386__ && defined __GNUC__
int64 r;
__asm__ volatile ("fistpll %0"
: "=m" (r)
: "t" (d)
: "st");
return r;
#endif
return _dtoi64_generic (d);
}
inline int64 BIRNET_CONST iround (double d) { return dtoi64 (round (d)); }
inline int64 BIRNET_CONST ifloor (double d) { return dtoi64 (floor (d)); }
inline int64 BIRNET_CONST iceil (double d) { return dtoi64 (ceil (d)); }
} // Birnet
#endif /* __BIRNET_MATH_HH__ */
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