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184 lines
5.9 KiB
184 lines
5.9 KiB
/* Float arithmetic
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*
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* (c) Copyright 1999, Artran, Inc.
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* Written by Greg Garner ([email protected])
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* Modified in March 2001 to include user defined
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* operators for the floating point functions.
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*
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* This file is provided as is (no warranties).
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*/
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#if defined _Float_included
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#endinput
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#endif
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#define _Float_included
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#pragma library Float
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/* Different methods of rounding */
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enum floatround_method {
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floatround_round,
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floatround_floor,
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floatround_ceil,
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floatround_tozero,
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floatround_unbiased
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}
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enum anglemode {
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radian,
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degrees,
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grades
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}
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/**************************************************/
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/* Convert an integer into a floating point value */
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native Float:float(value);
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/**************************************************/
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/* Convert a string into a floating point value */
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native Float:floatstr(const string[]);
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/**************************************************/
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/* Multiple two floats together */
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native Float:floatmul(Float:oper1, Float:oper2);
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/**************************************************/
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/* Divide the dividend float by the divisor float */
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native Float:floatdiv(Float:dividend, Float:divisor);
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/**************************************************/
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/* Add two floats together */
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native Float:floatadd(Float:oper1, Float:oper2);
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/**************************************************/
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/* Subtract oper2 float from oper1 float */
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native Float:floatsub(Float:oper1, Float:oper2);
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/**************************************************/
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/* Return the fractional part of a float */
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native Float:floatfract(Float:value);
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/**************************************************/
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/* Round a float into a integer value */
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native floatround(Float:value, floatround_method:method=floatround_round);
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/**************************************************/
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/* Compare two integers. If the two elements are equal, return 0.
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If the first argument is greater than the second argument, return 1,
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If the first argument is less than the second argument, return -1. */
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native floatcmp(Float:oper1, Float:oper2);
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/**************************************************/
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/* Return the square root of the input value, same as floatpower(value, 0.5) */
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native Float:floatsqroot(Float:value);
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/**************************************************/
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/* Return the value raised to the power of the exponent */
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native Float:floatpower(Float:value, Float:exponent);
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/**************************************************/
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/* Return the logarithm */
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native Float:floatlog(Float:value, Float:base=10.0);
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/**************************************************/
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/* Return the sine, cosine or tangent. The input angle may be in radian,
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degrees or grades. */
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native Float:floatsin(Float:value, anglemode:mode=radian);
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native Float:floatcos(Float:value, anglemode:mode=radian);
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native Float:floattan(Float:value, anglemode:mode=radian);
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/**************************************************/
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/* Return the absolute value */
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native Float:floatabs(Float:value);
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/**************************************************/
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#pragma rational Float
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/* user defined operators */
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native Float:operator*(Float:oper1, Float:oper2) = floatmul;
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native Float:operator/(Float:oper1, Float:oper2) = floatdiv;
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native Float:operator+(Float:oper1, Float:oper2) = floatadd;
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native Float:operator-(Float:oper1, Float:oper2) = floatsub;
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native Float:operator=(oper) = float;
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stock Float:operator++(Float:oper)
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return oper+1.0;
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stock Float:operator--(Float:oper)
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return oper-1.0;
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stock Float:operator-(Float:oper)
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return oper^Float:cellmin; /* IEEE values are sign/magnitude */
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stock Float:operator*(Float:oper1, oper2)
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return floatmul(oper1, float(oper2)); /* "*" is commutative */
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stock Float:operator/(Float:oper1, oper2)
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return floatdiv(oper1, float(oper2));
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stock Float:operator/(oper1, Float:oper2)
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return floatdiv(float(oper1), oper2);
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stock Float:operator+(Float:oper1, oper2)
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return floatadd(oper1, float(oper2)); /* "+" is commutative */
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stock Float:operator-(Float:oper1, oper2)
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return floatsub(oper1, float(oper2));
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stock Float:operator-(oper1, Float:oper2)
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return floatsub(float(oper1), oper2);
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stock bool:operator==(Float:oper1, Float:oper2)
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return floatcmp(oper1, oper2) == 0;
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stock bool:operator==(Float:oper1, oper2)
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return floatcmp(oper1, float(oper2)) == 0; /* "==" is commutative */
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stock bool:operator!=(Float:oper1, Float:oper2)
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return floatcmp(oper1, oper2) != 0;
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stock bool:operator!=(Float:oper1, oper2)
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return floatcmp(oper1, float(oper2)) != 0; /* "!=" is commutative */
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stock bool:operator>(Float:oper1, Float:oper2)
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return floatcmp(oper1, oper2) > 0;
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stock bool:operator>(Float:oper1, oper2)
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return floatcmp(oper1, float(oper2)) > 0;
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stock bool:operator>(oper1, Float:oper2)
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return floatcmp(float(oper1), oper2) > 0;
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stock bool:operator>=(Float:oper1, Float:oper2)
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return floatcmp(oper1, oper2) >= 0;
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stock bool:operator>=(Float:oper1, oper2)
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return floatcmp(oper1, float(oper2)) >= 0;
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stock bool:operator>=(oper1, Float:oper2)
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return floatcmp(float(oper1), oper2) >= 0;
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stock bool:operator<(Float:oper1, Float:oper2)
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return floatcmp(oper1, oper2) < 0;
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stock bool:operator<(Float:oper1, oper2)
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return floatcmp(oper1, float(oper2)) < 0;
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stock bool:operator<(oper1, Float:oper2)
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return floatcmp(float(oper1), oper2) < 0;
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stock bool:operator<=(Float:oper1, Float:oper2)
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return floatcmp(oper1, oper2) <= 0;
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stock bool:operator<=(Float:oper1, oper2)
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return floatcmp(oper1, float(oper2)) <= 0;
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stock bool:operator<=(oper1, Float:oper2)
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return floatcmp(float(oper1), oper2) <= 0;
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stock bool:operator!(Float:oper)
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return (_:oper & cellmax) == 0;
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/* forbidden operations */
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forward operator%(Float:oper1, Float:oper2);
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forward operator%(Float:oper1, oper2);
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forward operator%(oper1, Float:oper2);
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