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Sort out signedness issues.

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Windows is, not unreasonably, complaining that taking abs() of an unsigned is
ridiculous. But these values actually are signed and fit very easily in an int
anyway.

Change-Id: I34fecaaa3616732112e3eea105a7c84bd9cd0bae
Reviewed-on: https://boringssl-review.googlesource.com/8144
Reviewed-by: Adam Langley <agl@google.com>
This commit is contained in:
David Benjamin 2016-06-03 17:51:36 -04:00 committed by Adam Langley
parent d206dfa91f
commit dbec90b623
1 changed files with 8 additions and 8 deletions
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16
crypto/newhope/newhope_statistical_test.cc
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@ -75,7 +75,7 @@ static bool TestNoise(void) {
return true;
}
static int hamming32(const uint8_t key[NEWHOPE_KEY_LENGTH]) {
static int Hamming32(const uint8_t key[NEWHOPE_KEY_LENGTH]) {
static int kHamming[256] = {
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
@ -112,7 +112,7 @@ static bool TestKeys(void) {
sp(NEWHOPE_POLY_new()), ep(NEWHOPE_POLY_new()), epp(NEWHOPE_POLY_new()),
a(NEWHOPE_POLY_new()), bp(NEWHOPE_POLY_new()), rec(NEWHOPE_POLY_new());
uint64_t ones = 0;
int ones = 0;
for (size_t i = 0; i < kNumTests; i++) {
NEWHOPE_offer(offermsg, sk.get());
NEWHOPE_offer_frommsg(pk.get(), a.get(), offermsg);
@ -127,15 +127,15 @@ static bool TestKeys(void) {
NEWHOPE_accept_computation(key, bp.get(), rec.get(),
sp.get(), ep.get(), epp.get(), rand,
pk.get(), a.get());
ones += hamming32(key);
ones += Hamming32(key);
}
uint64_t bits = NEWHOPE_KEY_LENGTH * 8 * kNumTests;
uint64_t diff = bits - 2 * ones;
int bits = NEWHOPE_KEY_LENGTH * 8 * kNumTests;
int diff = bits - 2 * ones;
double fraction = (double) abs(diff) / bits;
printf("ones: %u\n", (unsigned) ones);
printf("zeroes: %u\n", (unsigned) (bits - ones));
printf("diff: got %u (%f), want %ld\n", (unsigned) diff, fraction, 0L);
printf("ones: %d\n", ones);
printf("zeroes: %d\n", (bits - ones));
printf("diff: got %d (%f), want 0\n", diff, fraction);
printf("\n");
if (fraction > 0.01) {