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https://github.com/reactos/reactos.git
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121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
#pragma once
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C_ASSERT(sizeof(FIX) == sizeof(LONG));
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#define FIX2LONG(x) (((x) + 8) >> 4)
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#define LONG2FIX(x) ((x) << 4)
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#if defined(_M_IX86)
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FORCEINLINE
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BOOL
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_FLOATOBJ_Equal(FLOATOBJ *pf1, FLOATOBJ *pf2)
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{
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EFLOAT_S *pef1 = (EFLOAT_S*)pf1;
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EFLOAT_S *pef2 = (EFLOAT_S*)pf2;
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return (pef1->lMant == pef2->lMant && pef1->lExp == pef2->lExp);
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}
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#define FLOATOBJ_Equal _FLOATOBJ_Equal
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/*!
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* \brief Converts a FLOATOBJ into a LONG by truncating the value to integer
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*
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* \param pf - Pointer to a FLOATOBJ containing the value to convert
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*
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* \param pl - Pointer to a variable that receives the result
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*
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* \return TRUE if the function succeeded, FALSE if the result would overflow
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* a LONG.
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*/
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FORCEINLINE
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BOOL
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FLOATOBJ_bConvertToLong(FLOATOBJ *pf, PLONG pl)
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{
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EFLOAT_S *pef = (EFLOAT_S*)pf;
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if (pef->lExp > 32)
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{
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return FALSE;
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}
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if (pef->lExp < 2)
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{
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*pl = 0;
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return TRUE;
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}
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*pl = EngMulDiv(pef->lMant, 1 << (pef->lExp - 2), 0x40000000);
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return TRUE;
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}
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FORCEINLINE
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LONG
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FLOATOBJ_GetFix(FLOATOBJ *pf)
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{
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EFLOAT_S *pef = (EFLOAT_S*)pf;
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LONG Shift = (28 - pef->lExp);
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return (Shift >= 0 ? pef->lMant >> Shift : pef->lMant << -Shift);
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}
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FORCEINLINE
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BOOL
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FLOATOBJ_IsLong(FLOATOBJ *pf)
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{
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EFLOAT_S *pef = (EFLOAT_S*)pf;
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ULONG ulShift = pef->lExp;
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if (ulShift < 32)
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return ((pef->lMant << ulShift) == 0);
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else
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return (ulShift == 32);
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}
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FORCEINLINE
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BOOL
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FLOATOBJ_Equal0(FLOATOBJ *pf)
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{
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EFLOAT_S *pef = (EFLOAT_S*)pf;
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return (pef->lMant == 0 && pef->lExp == 0);
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}
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FORCEINLINE
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BOOL
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FLOATOBJ_Equal1(FLOATOBJ *pf)
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{
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EFLOAT_S *pef = (EFLOAT_S*)pf;
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return (pef->lMant == 0x40000000 && pef->lExp == 2);
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}
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extern const FLOATOBJ gef0;
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extern const FLOATOBJ gef1;
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extern const FLOATOBJ gef2;
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extern const FLOATOBJ gef16;
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#define FLOATOBJ_0 {0x00000000, 0x00000000}
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#define FLOATOBJ_1 {0x40000000, 0x00000002}
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#define FLOATOBJ_16 {0x40000000, 0x00000006}
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#define FLOATOBJ_1_16 {0x40000000, 0xfffffffe}
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#define FLOATOBJ_Set0(fo) do { (fo)->ul1 = 0; (fo)->ul2 = 0; } while (0)
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#define FLOATOBJ_Set1(fo) do { (fo)->ul1 = 0x40000000; (fo)->ul2 = 2; } while (0)
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#else
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#define FLOATOBJ_bConvertToLong(pf, pl) (*pl = (LONG)*pf, TRUE)
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#define FLOATOBJ_IsLong(pf) ((FLOAT)((LONG)*(pf)) == *(pf))
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#define FLOATOBJ_Equal0(pf) (*(pf) == 0.)
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#define FLOATOBJ_Equal1(pf) (*(pf) == 1.)
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#define FLOATOBJ_GetFix(pf) ((LONG)(*(pf) * 16.))
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#define FLOATOBJ_0 0.
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#define FLOATOBJ_1 1.
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#define FLOATOBJ_16 16.
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#define FLOATOBJ_1_16 (1./16.)
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static const FLOATOBJ gef0 = 0.;
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static const FLOATOBJ gef1 = 1.;
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static const FLOATOBJ gef2 = 2.;
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static const FLOATOBJ gef16 = 16.;
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#define FLOATOBJ_Set0(fo) *(fo) = 0;
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#define FLOATOBJ_Set1(fo) *(fo) = 1;
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#endif
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