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slalib/slamac.h

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+#ifndef SLAMACHDEF
+#define SLAMACHDEF
+
+/*
+   **  - - - - - - - - -
+   **   s l a m a c . h
+   **  - - - - - - - - -
+   **
+   **  Macros used by slalib library.
+   **
+   **  Last revision:   5 June 1996
+   **
+   **  Copyright P.T.Wallace.  All rights reserved.
+ */
+
+/* max(A,B) - larger (most +ve) of two numbers (generic) */
+#define gmax(A,B) ((A)>(B)?(A):(B))
+
+/* min(A,B) - smaller (least +ve) of two numbers (generic) */
+#define gmin(A,B) ((A)<(B)?(A):(B))
+
+/* dint(A) - truncate to nearest whole number towards zero (double) */
+#define dint(A) ((A)<0.0?ceil(A):floor(A))
+
+/* aint(A) - truncate to nearest whole number towards zero (float) */
+#define aint(A) ((A)<0.0f?(float)ceil((double)(A)):(float)floor((double)(A)))
+
+/* dnint(A) - round to nearest whole number (double) */
+#define dnint(A) ((A)<0.0?ceil((A)-0.5):floor((A)+0.5))
+
+/* anint(A) - round to nearest whole number (float) */
+#define anint(A) ((float)dnint((double)(A)))
+
+/* dsign(A,B) - magnitude of A with sign of B (double) */
+#define dsign(A,B) ((B)<0.0?-(A):(A))
+
+/* dmod(A,B) - A modulo B (double) */
+#define dmod(A,B) ((B)!=0.0?((A)*(B)>0.0?(A)-(B)*floor((A)/(B))\
+                                        :(A)+(B)*floor(-(A)/(B))):(A))
+
+/* logicals */
+#if !defined(FALSE) || ((FALSE)!=0)
+#define FALSE 0
+#endif
+#if !defined(TRUE) || ((TRUE)!=1)
+#define TRUE 1
+#endif
+
+/* pi */
+#define DPI 3.1415926535897932384626433832795028841971693993751
+
+/* 2pi */
+#define D2PI 6.2831853071795864769252867665590057683943387987502
+
+/* 1/(2pi) */
+#define D1B2PI 0.15915494309189533576888376337251436203445964574046
+
+/* 4pi */
+#define D4PI 12.566370614359172953850573533118011536788677597500
+
+/* 1/(4pi) */
+#define D1B4PI 0.079577471545947667884441881686257181017229822870228
+
+/* pi^2 */
+#define DPISQ 9.8696044010893586188344909998761511353136994072408
+
+/* sqrt(pi) */
+#define DSQRPI 1.7724538509055160272981674833411451827975494561224
+
+/* pi/2:  90 degrees in radians */
+#define DPIBY2 1.5707963267948966192313216916397514420985846996876
+
+/* pi/180:  degrees to radians */
+#define DD2R 0.017453292519943295769236907684886127134428718885417
+
+/* 180/pi:  radians to degrees */
+#define DR2D 57.295779513082320876798154814105170332405472466564
+
+/* pi/(180*3600):  arcseconds to radians */
+#define DAS2R 4.8481368110953599358991410235794797595635330237270e-6
+
+/* 180*3600/pi :  radians to arcseconds */
+#define DR2AS 2.0626480624709635515647335733077861319665970087963e5
+
+/* pi/12:  hours to radians */
+#define DH2R 0.26179938779914943653855361527329190701643078328126
+
+/* 12/pi:  radians to hours */
+#define DR2H 3.8197186342054880584532103209403446888270314977709
+
+/* pi/(12*3600):  seconds of time to radians */
+#define DS2R 7.2722052166430399038487115353692196393452995355905e-5
+
+/* 12*3600/pi:  radians to seconds of time */
+#define DR2S 1.3750987083139757010431557155385240879777313391975e4
+
+/* 15/(2pi):  hours to degrees x radians to turns */
+#define D15B2P 2.3873241463784300365332564505877154305168946861068
+
+#endif