Function cbm_platform_scale_fraction

src/foundation/platform.c:18–44

#define CBM_NSEC_PER_SEC 1000000000ULL

static uint64_t cbm_platform_scale_fraction(uint64_t remainder, uint64_t multiplier,
                                            uint64_t divisor) {
    uint64_t quotient = 0;
    uint64_t reduced = 0;
    uint64_t mask = 1;
    while (mask <= multiplier / 2) {
        mask <<= 1U;
    }
    for (; mask != 0; mask >>= 1U) {
        quotient *= 2;
        if (reduced >= divisor - reduced) {
            reduced -= divisor - reduced;
            quotient++;
        } else {
            reduced += reduced;
        }
        if ((multiplier & mask) != 0) {
            if (reduced >= divisor - remainder) {
                reduced -= divisor - remainder;
                quotient++;
            } else {
                reduced += remainder;
            }
        }
    }
    return quotient;
}

uint64_t cbm_platform_scale_counter_ns(uint64_t counter, uint64_t frequency) {
    if (frequency == 0) {