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/* Copyright (C) CZ.NIC, z.s.p.o. and contributors
* SPDX-License-Identifier: GPL-2.0-or-later
* For more information, see <https://www.knot-dns.cz/>
*/
#include <tap/basic.h>
#include <string.h>
#include "bignum.c"
#include "binary.h"
#define bin_init(array) { .data = array, .size = sizeof(array) }
#define test_size(value, usize, ssize, msg) \
dnssec_binary_t __bin = bin_init(value); \
is_int(usize, bignum_size_u(&__bin), "bignum_size_u, " msg); \
is_int(ssize, bignum_size_s(&__bin), "bignum_size_s, " msg)
#define test_write(num, expect, msg) \
uint8_t __buffer[sizeof(expect)]; \
memset(__buffer, 0xaa, sizeof(__buffer)); \
wire_ctx_t __ctx = wire_ctx_init(__buffer, sizeof(expect)); \
dnssec_binary_t __num = bin_init(num); \
dnssec_binary_t __exp = bin_init(expect); \
bignum_write(&__ctx, sizeof(expect), &__num); \
dnssec_binary_t __dst = bin_init(__buffer); \
ok(dnssec_binary_cmp(&__dst, &__exp) == 0, "bignum_write, " msg)
int main(int argc, char *argv[])
{
plan_lazy();
{
uint8_t num[] = { };
test_size(num, 1, 1, "empty string");
}
{
uint8_t num[] = { 0x00 };
test_size(num, 1, 1, "zero");
}
{
uint8_t num[] = { 0x00, 0x00, 0x00 };
test_size(num, 1, 1, "long zero");
}
{
uint8_t num[] = { 0x01, 0x02, 0x03 };
test_size(num, 3, 3, "no MSB");
}
{
uint8_t num[] = { 0x7f, 0xff, 0x00, 0x00, 0x00 };
test_size(num, 5, 5, "no MSB but all other bits");
}
{
uint8_t num[] = { 0x84, 0x42 };
test_size(num, 2, 3, "MSB");
}
{
uint8_t num[] = { 0x00, 0x84, 0x42 };
test_size(num, 2, 3, "MSB and leading zero");
}
{
uint8_t num[] = { 0x00, 0x00, 0x00, 0x00, 0xfc, 0xe1, 0xda };
test_size(num, 3, 4, "MSB, many leading zeroes");
}
{
uint8_t num[] = { 0x00, 0x00, 0x00, 0x01 };
test_size(num, 1, 1, "no MSB, many leading zeroes");
}
// test writing
{
uint8_t num[] = { };
uint8_t exp[] = { 0x00 };
test_write(num, exp, "empty string");
}
{
uint8_t num[] = { 0x00 };
uint8_t exp[] = { 0x00 };
test_write(num, exp, "zero");
}
{
uint8_t num[] = { 0x11, 0x22, 0x33 };
uint8_t exp[] = { 0x00, 0x00, 0x00, 0x11, 0x22, 0x33 };
test_write(num, exp, "no MSB, right-aligned");
}
{
uint8_t num[] = { 0xff, 0xee, 0xdd };
uint8_t exp[] = { 0x00, 0x00, 0x00, 0xff, 0xee, 0xdd };
test_write(num, exp, "MSB, right-aligned");
}
{
uint8_t num[] = { 0x11, 0x22, 0x33 };
uint8_t exp[] = { 0x11, 0x22, 0x33 };
test_write(num, exp, "no MSB, fitting exactly");
}
{
uint8_t num[] = { 0xff, 0xee, 0xdd };
uint8_t exp[] = { 0xff, 0xee, 0xdd };
test_write(num, exp, "MSB, fitting exactly");
}
return 0;
}
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