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bignum-test.c
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Nettle / nettle
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Niels Möller authoredNiels Möller authored
bignum-test.c 2.03 KiB
#include "testutils.h"
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#if WITH_HOGWEED
#include "bignum.h"
static void
test_bignum(const char *hex, const struct tstring *base256)
{
mpz_t a;
mpz_t b;
uint8_t *buf;
mpz_init_set_str(a, hex, 16);
nettle_mpz_init_set_str_256_s(b, base256->length, base256->data);
ASSERT(mpz_cmp(a, b) == 0);
buf = xalloc(base256->length + 1);
memset(buf, 17, base256->length + 1);
nettle_mpz_get_str_256(base256->length, buf, a);
ASSERT(MEMEQ(base256->length, buf, base256->data));
ASSERT(buf[base256->length] == 17);
mpz_clear(a); mpz_clear(b);
free(buf);
}
static void
test_size(long x, unsigned size)
{
mpz_t t;
mpz_init_set_si(t, x);
ASSERT(nettle_mpz_sizeinbase_256_s(t) == size);
mpz_clear(t);
}
#endif /* WITH_HOGWEED */
void
test_main(void)
{
#if WITH_HOGWEED
test_size(0, 1);
test_size(1, 1);
test_size(0x7f, 1);
test_size(0x80, 2);
test_size(0x81, 2);
test_size(0xff, 2);
test_size(0x100, 2);
test_size(0x101, 2);
test_size(0x1111, 2);
test_size(0x7fff, 2);
test_size(0x8000, 3);
test_size(0x8001, 3);
test_size(- 1, 1); /* ff */
test_size(- 0x7f, 1); /* 81 */
test_size(- 0x80, 1); /* 80 */
test_size(- 0x81, 2); /* ff7f */
test_size(- 0xff, 2); /* ff01 */