/*
* Calculate the checksum for a uuid.
*/
uint32_t
checksum_uuid(uuid_t *source)
{
uint8_t buf[16];
uuid_enc_be(buf, source);
return checksum_uint8_array(buf, 16);
}
zuuid_t *
zuuid_new (void)
{
zuuid_t *self = (zuuid_t *) zmalloc (sizeof (zuuid_t));
assert (self);
#if defined (__WINDOWS__)
// Windows always has UUID support
UUID uuid;
assert (sizeof (uuid) == ZUUID_LEN);
UuidCreate (&uuid);
zuuid_set (self, (byte *) &uuid);
#elif defined (__UTYPE_ANDROID) || !defined (HAVE_UUID)
// No UUID system calls, so generate a random string
byte uuid [ZUUID_LEN];
int fd = open ("/dev/urandom", O_RDONLY);
if (fd != -1) {
ssize_t bytes_read = read (fd, uuid, ZUUID_LEN);
assert (bytes_read == ZUUID_LEN);
close (fd);
zuuid_set (self, uuid);
}
else {
// We couldn't read /dev/urandom and we have no alternative
// strategy
zsys_error (strerror (errno));
assert (false);
}
#elif defined (__UTYPE_OPENBSD) || defined (__UTYPE_FREEBSD) || defined (__UTYPE_NETBSD)
uuid_t uuid;
uint32_t status = 0;
uuid_create (&uuid, &status);
if (status != uuid_s_ok) {
zuuid_destroy (&self);
return NULL;
}
byte buffer [ZUUID_LEN];
uuid_enc_be (&buffer, &uuid);
zuuid_set (self, buffer);
#elif defined (__UTYPE_LINUX) || defined (__UTYPE_OSX) || defined (__UTYPE_SUNOS) || defined (__UTYPE_SUNSOLARIS) || defined (__UTYPE_GNU)
uuid_t uuid;
assert (sizeof (uuid) == ZUUID_LEN);
uuid_generate (uuid);
zuuid_set (self, (byte *) uuid);
#else
# error "Unknown UNIX TYPE"
#endif
return self;
}
