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#include "testutils.h"
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#if HAVE_LIBGMP
#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 /* HAVE_LIBGMP */
void
test_main(void)
{
#if HAVE_LIBGMP
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 */
test_size(- 0x100, 2); /* ff00 */
test_size(- 0x101, 2); /* feff */
test_size(- 0x1111, 2); /* eeef */
test_size(- 0x7fff, 2); /* 8001 */
test_size(- 0x8000, 2); /* 8000 */
test_size(- 0x8001, 3); /* ff7fff */
test_bignum("0", SHEX("00"));
test_bignum("010203040506", SHEX("010203040506"));
test_bignum("80010203040506", SHEX("0080010203040506"));
test_bignum( "-1", SHEX( "ff"));
test_bignum( "-7f", SHEX( "81"));
test_bignum( "-80", SHEX( "80"));
test_bignum( "-81", SHEX( "ff7f"));
test_bignum("-7fff", SHEX( "8001"));
test_bignum("-8000", SHEX( "8000"));
test_bignum("-8001", SHEX("ff7fff"));
#else /* !HAVE_LIBGMP */
SKIP();
#endif /* !HAVE_LIBGMP */
}
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