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/****************************************************************************/
/* REAL.H: include file to support compile-time specification of precision */
/* in floating-point calculations. If the DOUBLEPREC symbol is defined to */
/* the preprocessor, calculations are done in double precision; otherwise, */
/* they may be done in single precision. */
/* */
/* Rationale: ANSI C enables programmers to write single-precision code, */
/* but does not make it easy to change the precision of code at compile */
/* time, since different functions names are used for floating and double */
/* calculations. This package introduces the keyword "real", which may be */
/* either float or double, and defines functions which compute with */
/* real-valued numbers. */
/* */
/* Copyright (c) 1993 by Joshua E. Barnes, Honolulu, HI. */
/* It's free because it's yours. */
/****************************************************************************/
/*
* REAL, REALPTR: real-valued number, and pointer to same.
*/
#ifndef DOUBLEPREC
typedef float real, *realptr;
#else
typedef double real, *realptr;
#endif
/*
* RPROC: pointer to a real-valued function. This prototype does
* not specify the types of any arguments.
*/
typedef real (*rproc)();
/*
* Include math.h to get prototypes for standard C math functions.
*/
#include <math.h>
/*
* Real-valued library functions. Most of these are actually supplied
* by the standard C libraries.
*/
#ifndef DOUBLEPREC
# define rsqrt sqrtf
# define rsqr fsqr
# define rsin sinf
# define rcos cosf
# define rtan tanf
# define rasin asinf
# define racos acosf
# define ratan atanf
# define ratan2 atan2f
# define rlog logf
# define rexp expf
# define rlog10 log10f
# define rsinh sinhf
# define rcosh coshf
# define rtanh tanhf
# define rpow powf
# define rabs fabsf
# define rfloor floorf
# define rceil ceilf
/*
* These functions are not part of the standard C libraries.
*/
float fsqr(float); /* square function */
#else
# define rsqrt sqrt
# define rsqr sqr
# define rsin sin
# define rcos cos
# define rtan tan
# define rasin asin
# define racos acos
# define ratan atan
# define ratan2 atan2
# define rlog log
# define rexp exp
# define rlog10 log10
# define rsinh sinh
# define rcosh cosh
# define rtanh tanh
# define rpow pow
# define rabs fabs
# define rfloor floor
# define rceil ceil
/*
* These functions are not part of the standard C libraries.
*/
double sqr(double); /* square function */
#endif
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