project_files/hwc/rtl/pmath.c
author unc0rr
Sat, 27 Dec 2014 22:09:31 +0300
branch0.9.21
changeset 10721 9b789de8e5df
parent 8047 25a4daa6473c
child 14185 801dc57371c3
permissions -rw-r--r--
Workaround bug (each time losing room master status, even when joining mutliple rooms, new instance of NetAmmoSchemeModel created, receiving schemeConfig and modifying its 43rd member, thus the last model which accepts this signal has the string cut down several times, workaround creates copy of qstringlist to avoid modifying shared message instance. Proper fix would delete unneeded instances of NetAmmoSchemeModel, but who cares)

#include "pmath.h"
#include <stdlib.h>
#include <math.h>

/*
 * power raises base to the power power.
 * This is equivalent to exp(power*ln(base)). Therefore base should be non-negative.
 */
float fpcrtl_power(float base, float exponent)
{
    return exp(exponent * log(base));
}

/* Currently the games only uses sign of an integer */
int fpcrtl_signi(int x)
{
    if(x > 0){
        return 1;
    }
    else if(x < 0){
        return -1;
    }
    else{
        return 0;
    }
}

float fpcrtl_csc(float x)
{
    return 1 / sin(x);
}

float __attribute__((overloadable)) fpcrtl_abs(float x)
{
    return fabs(x);
}
double __attribute__((overloadable)) fpcrtl_abs(double x)
{
    return fabs(x);
}
int __attribute__((overloadable)) fpcrtl_abs(int x)
{
    return abs(x);
}

int64_t __attribute__((overloadable)) fpcrtl_abs(int64_t x)
{
    return x < 0 ? -x : x;
}