igtl_uint64 igtl_export igtl_string_get_crc(igtl_string_header * header, void* string)
{
igtl_uint64 crc;
igtl_uint64 string_length;
/* convert byte order to get string length */
igtl_string_convert_byte_order(header);
string_length = (igtl_uint32)(header->length);
igtl_string_convert_byte_order(header);
crc = crc64(0, 0, 0);
crc = crc64((unsigned char*) header, IGTL_STRING_HEADER_SIZE, crc);
crc = crc64((unsigned char*) string, (int)string_length, crc);
return crc;
}
int main( int argc, char * argv [] )
{
struct string_message message;
/*igtl_uint64 crc;*/
int r;
int s;
// Test structure size
if (sizeof(message) != IGTL_HEADER_SIZE+IGTL_STRING_HEADER_SIZE+IGTL_STRING_TEST_STRING_LEN)
{
fprintf(stdout, "Invalid size of image message structure.\n");
return EXIT_FAILURE;
}
/* Set dummy string header and values */
message.string_header.encoding = 3;
message.string_header.length = IGTL_STRING_TEST_STRING_LEN;
strncpy((char*)message.string, IGTL_STRING_TEST_STRING, IGTL_STRING_TEST_STRING_LEN);
igtl_string_convert_byte_order(&(message.string_header));
/* Set header */
message.header.version = 1;
strncpy( (char*)&(message.header.name), "STRING", 12 );
strncpy( (char*)&(message.header.device_name), "DeviceName", 20 );
message.header.timestamp = 1234567892;
message.header.body_size = IGTL_STRING_HEADER_SIZE + IGTL_STRING_TEST_STRING_LEN;
message.header.crc = igtl_string_get_crc(&(message.string_header), (void*) message.string);
igtl_header_convert_byte_order( &(message.header) );
/* Dumping data -- for testing */
/*
FILE *fp;
fp = fopen("string.bin", "w");
fwrite(&(message.header), IGTL_HEADER_SIZE+IGTL_STRING_HEADER_SIZE + IGTL_STRING_TEST_STRING_LEN, 1, fp);
fclose(fp);
*/
/* Compare the serialized byte array with the gold standard */
r = memcmp((const void*)&message, (const void*)test_string_message,
IGTL_HEADER_SIZE+IGTL_STRING_HEADER_SIZE+IGTL_STRING_TEST_STRING_LEN);
if (r == 0)
{
return EXIT_SUCCESS;
}
else
{
/* Print first 256 bytes as HEX values in STDERR for debug */
s = IGTL_HEADER_SIZE+IGTL_STRING_HEADER_SIZE+IGTL_STRING_TEST_STRING_LEN;
if (s > 256)
{
s = 256;
}
fprintf(stdout, "\n===== First %d bytes of the test message =====\n", s);
igtl_message_dump_hex(stdout, (const void*)&message, s);
return EXIT_FAILURE;
}
}
