genrand.h

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class NOVTABLE genrand_service : public service_base
{
public:
    virtual void seed(unsigned val) = 0;
    virtual unsigned genrand(unsigned range)=0;

    double genrand_f() { return (double)genrand(0xFFFFFFFF) / (double)0xFFFFFFFF; }

    static service_ptr_t<genrand_service> g_create() {return standard_api_create_t<genrand_service>();}

    void generate_random_order(t_size * out, t_size count) {
        unsigned genrandMax = (unsigned) pfc::min_t<size_t>(count, 0xFFFFFFFF);
        t_size n;
        for(n=0;n<count;n++) out[n]=n;
        for(n=0;n<count;n++) pfc::swap_t(out[n],out[genrand(genrandMax)]);
    }

    FB2K_MAKE_SERVICE_INTERFACE_ENTRYPOINT(genrand_service);
};