include/System/Random.hpp


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#pragma once

#include "global.h"
#include "types.h"

struct Random {
    /* 00 */ u64 mRandomValue;
    /* 08 */ u64 mFactor;
    /* 10 */ u64 mAddend;
    /* 18 */

    /**
     * Generate a random number from 0 (inclusive) to `max` (exclusive)
     */
    inline u32 Next(u32 max) {
        mRandomValue = mAddend + mFactor * mRandomValue;
        u64 result   = (mRandomValue >> 32) * max;
        return result >> 32;
    }
};

extern Random gRandom;