static int write_u16(FILE *f, uint16_t v)
{
v = sys_htols(v);
if (1 != fwrite(&v, sizeof(v), 1, f))
return ferror(f);
return 0;
}
int test_sys_endian(void)
{
uint16_t s_le, s_ho;
uint8_t *s = (uint8_t *)&s_le;
uint32_t l_le, l_ho;
uint8_t *l = (uint8_t *)&l_le;
uint64_t ll0, ll1 = 0x0102030405060708ULL;
/* Little endian: LSB first - 0x1234
*
* 0x0000: 0x34
* 0x0001: 0x12
*/
s[0] = 0x34;
s[1] = 0x12;
s_ho = sys_ltohs(s_le);
if (0x1234 != s_ho) {
DEBUG_WARNING("endian short: 0x%04x\n", s_ho);
return EINVAL;
}
if (s_le != sys_htols(s_ho)) {
DEBUG_WARNING("sys_htols failed: 0x%04x\n", sys_htols(s_ho));
return EINVAL;
}
/* 0x12345678
*
* 0x0000: 0x78
* 0x0001: 0x56
* 0x0002: 0x34
* 0x0003: 0x12
*/
l[0] = 0x78;
l[1] = 0x56;
l[2] = 0x34;
l[3] = 0x12;
l_ho = sys_ltohl(l_le);
if (0x12345678 != l_ho) {
DEBUG_WARNING("endian long: 0x%08x\n", l_ho);
return EINVAL;
}
if (l_le != sys_htoll(l_ho)) {
DEBUG_WARNING("sys_htoll failed: 0x%08x\n", sys_htoll(l_ho));
return EINVAL;
}
/* Test 64-bit */
ll0 = sys_ntohll(sys_htonll(ll1));
if (ll0 != ll1) {
DEBUG_WARNING("endian long-long: 0x%llx\n", ll0);
return EINVAL;
}
return 0;
}
