Source code of Windows XP (NT5)
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#ifndef CALCMACR_H
#define CALCMACR_H
#ifndef LK_CODE_INCLUDED
#include "lk_code.h"
#endif
/* Useful non-portable macros (on other platform they may need *//* to be redefined, though this is almost unprobable): */
/* The following macros are applicable only to positive */ /* integer-type values: */
#define wODD(w) ((w)&1)
#define wEVEN(w) (!wODD(w))
#define ONE_HALF(X) ( (X) >> 1 )
#define ONE_THIRD(X) ( ((X)+1) / 3 )
#define TWO_THIRD(X) ( (((X)<<1)+1) / 3 )
#define ONE_FOURTH(X) ( ((X)+2) >> 2 )
#define ONE_FIFTH(X) ( ((X) + 2) / 5 )
#define TWO_FIFTH(X) ( (((X)<<1) + 2) / 5 )
#define ONE_EIGHTTH(X) ( ((X) + 4) >> 3 )
#define ONE_NTH(X,N) ( ((X) + ONE_HALF(N)) / (N) )
#define MULT_RATIO(X,NMR,DNM) ( ((X)*NMR + ONE_HALF(DNM)) / (DNM) )
#define TWO(X) ( (X) << 1 )
#define FOUR(X) ( (X) << 2 )
#define EIGHT(X) ( (X) << 3 )
#ifdef __cplusplus
inline _INT THREE_HALF(_SHORT X) { return (X + ONE_HALF(X)); } inline _INT THREE_HALF(_INT X) { return (X + ONE_HALF(X)); } inline _LONG THREE_HALF(_LONG X) { return (X + ONE_HALF(X)); }
inline _INT FOUR_THIRD(_SHORT X) { return (X + ONE_THIRD(X)); } inline _INT FOUR_THIRD(_INT X) { return (X + ONE_THIRD(X)); } inline _LONG FOUR_THIRD(_LONG X) { return (X + ONE_THIRD(X)); }
inline _INT THREE_FOURTH(_SHORT X) { return (X - ONE_FOURTH(X)); } inline _INT THREE_FOURTH(_INT X) { return (X - ONE_FOURTH(X)); } inline _LONG THREE_FOURTH(_LONG X) { return (X - ONE_FOURTH(X)); }
inline _INT FIVE_FOURTH(_SHORT X) { return (X + ONE_FOURTH(X)); } inline _INT FIVE_FOURTH(_INT X) { return (X + ONE_FOURTH(X)); } inline _LONG FIVE_FOURTH(_LONG X) { return (X + ONE_FOURTH(X)); }
inline _INT FOUR_FIFTH(_SHORT X) { return (X - ONE_FIFTH(X)); } inline _INT FOUR_FIFTH(_INT X) { return (X - ONE_FIFTH(X)); } inline _LONG FOUR_FIFTH(_LONG X) { return (X - ONE_FIFTH(X)); }
inline _INT THREE(_SHORT X) { return (X + TWO(X)); } inline _INT THREE(_INT X) { return (X + TWO(X)); } inline _LONG THREE(_LONG X) { return (X + TWO(X)); }
inline _INT FIVE(_SHORT X) { return (X + FOUR(X)); } inline _INT FIVE(_INT X) { return (X + FOUR(X)); } inline _LONG FIVE(_LONG X) { return (X + FOUR(X)); }
#else /* !__cplusplus */
#define THREE_HALF(X) ( (X) + ONE_HALF(X) )
#define FOUR_THIRD(X) ( (X) + ONE_THIRD(X) )
#define THREE_FOURTH(X) ( (X) - ONE_FOURTH(X) )
#define FIVE_FOURTH(X) ( (X) + ONE_FOURTH(X) )
#define FOUR_FIFTH(X) ( (X) - ONE_FIFTH(X) )
#define THREE(X) ( (X) + TWO(X) )
#define FIVE(X) ( (X) + FOUR(X) )
#endif /* !__cplusplus */
#define TO_TWO_TIMES(X) {(X) <<= 1;}
#define TO_THREE_TIMES(X) {(X) += ((X)<<1);}
/***************************************/
/* Useful portable macros: */
#define DX_RECT(rect) ((rect).right - (rect).left)
#define DY_RECT(rect) ((rect).bottom - (rect).top)
#define XMID_RECT(rect) ONE_HALF((rect).left + (rect).right)
#define YMID_RECT(rect) ONE_HALF((rect).top + (rect).bottom)
#define SWAP_SHORTS(w1,w2) {_SHORT w; w=w1; w1=w2; w2=w;}
#define SWAP_INTS(w1,w2) {_INT w; w=w1; w1=w2; w2=w;}
#define EQ_SIGN(X,Y) (((X)>=0) == ((Y)>=0))
#define TO_ABS_VALUE(X) {if ((X) < 0) (X) = -(X);}
#define MEAN_OF(X,Y) ONE_HALF((X) + (Y))
/***************************************/
/* Useful macros for lower level: */
#define MID_POINT(elem) MEAN_OF(REF(elem)->ibeg,REF(elem)->iend)
#define NO_ATTR_ASSIGNED(elem) (!(REF(elem)->attr))
#define CLEAR_ATTR(elem) {CHECK_PTR(elem); (elem)->attr = 0;}
#define HEIGHT_OF(elem) (REF(elem)->attr & _umd_)
#define ASSIGN_HEIGHT(elem,h) (elem)->attr = (REF(elem)->attr&(~_umd_)) | (((_UCHAR)(h))&_umd_) /*Should be ";"*/
#define CIRCLE_DIR(elem) (REF(elem)->attr & _fb_)
#define CLOCKWISE(elem) (CIRCLE_DIR(elem) == _f_)
#define COUNTERCLOCKWISE(elem) (CIRCLE_DIR(elem) == _b_)
#define ASSIGN_CIRCLE_DIR(elem,FB) (elem)->attr = (REF(elem)->attr&(~_fb_)) | (((_UCHAR)(FB))&_fb_) /*Should be ";"*/
#define SET_CLOCKWISE(elem) ASSIGN_CIRCLE_DIR(elem,_f_)
#define SET_COUNTERCLOCKWISE(elem) ASSIGN_CIRCLE_DIR(elem,_b_)
#define SET_OVR(elem) {CHECK_PTR(elem); (elem)->attr |= _OVR_;}
#define CLEAR_OVR(elem) {CHECK_PTR(elem); (elem)->attr &= (~_OVR_);}
#endif /*CALCMACR_H*/
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