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/*=========================================================================
Program: The OpenIGTLink Library
Language: C
Web page: http://openigtlink.org/
Copyright (c) Insight Software Consortium. All rights reserved.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include <string.h>
#include <math.h>
#include "igtl_command.h"
#include "igtl_util.h"
void igtl_export igtl_command_convert_byte_order(igtl_command_header* header)
{
if (igtl_is_little_endian())
{
header->commandId = BYTE_SWAP_INT32(header->commandId);
header->encoding = BYTE_SWAP_INT16(header->encoding);
header->length = BYTE_SWAP_INT32(header->length);
}
}
igtl_uint64 igtl_export igtl_command_get_crc(igtl_command_header * header, void* command)
{
igtl_uint64 crc;
igtl_uint32 command_length;
/* convert byte order to get command length */
igtl_command_convert_byte_order(header);
command_length = (igtl_uint32)(header->length);
igtl_command_convert_byte_order(header);
crc = crc64(0, 0, 0);
crc = crc64((unsigned char*) header, IGTL_COMMAND_HEADER_SIZE, crc);
crc = crc64((unsigned char*) command, command_length, crc);
return crc;
}
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