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/* Test of host and network byte order conversion functions.
Copyright (C) 2024-2025 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Collin Funk <collin.funk1@gmail.com>, 2024. */
#include <config.h>
/* Specification. */
#include <arpa/inet.h>
#include <endian.h>
#include <stdint.h>
#include "macros.h"
/* Test byte order conversion functions with constant values. */
static void
test_convert_constant (void)
{
#if BYTE_ORDER == BIG_ENDIAN
/* 16-bit. */
ASSERT (htons (UINT16_C (0x1234)) == UINT16_C (0x1234));
ASSERT (ntohs (UINT16_C (0x1234)) == UINT16_C (0x1234));
/* 32-bit. */
ASSERT (htonl (UINT32_C (0x12345678)) == UINT32_C (0x12345678));
ASSERT (ntohl (UINT32_C (0x12345678)) == UINT32_C (0x12345678));
#else
/* 16-bit. */
ASSERT (htons (UINT16_C (0x1234)) == UINT16_C (0x3412));
ASSERT (ntohs (UINT16_C (0x1234)) == UINT16_C (0x3412));
/* 32-bit. */
ASSERT (htonl (UINT32_C (0x12345678)) == UINT32_C (0x78563412));
ASSERT (ntohl (UINT32_C (0x12345678)) == UINT32_C (0x78563412));
#endif
}
/* Test that the byte order conversion functions evaluate their
arguments once. */
static void
test_convert_eval_once (void)
{
/* 16-bit. */
{
uint16_t value = 0;
ASSERT (htons (value++) == 0);
ASSERT (value == 1);
}
{
uint16_t value = 0;
ASSERT (ntohs (value++) == 0);
ASSERT (value == 1);
}
/* 32-bit. */
{
uint32_t value = 0;
ASSERT (htonl (value++) == 0);
ASSERT (value == 1);
}
{
uint32_t value = 0;
ASSERT (ntohl (value++) == 0);
ASSERT (value == 1);
}
}
/* Test that the byte order conversion functions accept floating-point
arguments. */
static void
test_convert_double (void)
{
/* 16-bit. */
ASSERT (htons (0.0) == 0);
ASSERT (ntohs (0.0) == 0);
/* 32-bit. */
ASSERT (htonl (0.0) == 0);
ASSERT (ntohs (0.0) == 0);
}
int
main (void)
{
test_convert_constant ();
test_convert_eval_once ();
test_convert_double ();
return test_exit_status;
}
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