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tests/bloom_bytes: use fixed point to calculate result

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Benjamin Valentin 2023-01-16 13:57:02 +01:00 committed by Benjamin Valentin
parent 72914bb197
commit 5e0e9bedec
1 changed files with 6 additions and 2 deletions
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8
tests/sys/bloom_bytes/main.c
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@ -107,13 +107,17 @@ int main(void)
printf("\n"); printf("\n");
printf("%d elements probably in the filter.\n", in); printf("%d elements probably in the filter.\n", in);
printf("%d elements not in the filter.\n", not_in); printf("%d elements not in the filter.\n", not_in);
double false_positive_rate = (double) in / (double) lenA; unsigned false_positive_rate = (1000UL * in) / lenA;
/* Use 'fmt/print_float' to work on all platforms (atmega) /* Use 'fmt/print_float' to work on all platforms (atmega)
* Stdout should be flushed before to prevent garbled output. */ * Stdout should be flushed before to prevent garbled output. */
#if defined(MODULE_NEWLIB) || defined(MODULE_PICOLIBC) #if defined(MODULE_NEWLIB) || defined(MODULE_PICOLIBC)
fflush(stdout); fflush(stdout);
#endif #endif
print_float(false_positive_rate, 6);
char buf[8];
int res = fmt_s32_dfp(buf, false_positive_rate, -3);
print(buf, res);
puts(" false positive rate."); puts(" false positive rate.");
bloom_del(&bloom); bloom_del(&bloom);