Program Listing for File fastMath.cpp

↰ Return to documentation for file (librapid/src/fastMath.cpp)

#include <librapid/librapid.hpp>

namespace librapid::fastmath {
    double pow10(int64_t exponent) {
        const static double pows[] = {0.0000001,
                                      0.000001,
                                      0.00001,
                                      0.0001,
                                      0.001,
                                      0.01,
                                      0.1,
                                      1,
                                      10,
                                      100,
                                      1000,
                                      10000,
                                      100000,
                                      1000000,
                                      1000000};

        if (exponent >= -7 && exponent <= 7) return pows[exponent + 7];

        double res = 1;

        if (exponent > 0)
            for (int64_t i = 0; i < exponent; ++i) res *= 10.;
        else
            for (int64_t i = 0; i > exponent; --i) res *= 0.1;

        return res;
    }
}