/*=========================================================================

  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 "igtl_util.h"

int igtl_export igtl_is_little_endian()
{
  short a = 1; 
  return ((char*)&a)[0];
}


igtl_uint64 igtl_export crc64(unsigned char *data,  igtl_uint64 len, igtl_uint64 crc)
{

    static const igtl_uint64 table[256] = {
    0x0000000000000000ULL,0x42F0E1EBA9EA3693ULL,
    0x85E1C3D753D46D26ULL,0xC711223CFA3E5BB5ULL,
    0x493366450E42ECDFULL,0x0BC387AEA7A8DA4CULL,
    0xCCD2A5925D9681F9ULL,0x8E224479F47CB76AULL,
    0x9266CC8A1C85D9BEULL,0xD0962D61B56FEF2DULL,
    0x17870F5D4F51B498ULL,0x5577EEB6E6BB820BULL,
    0xDB55AACF12C73561ULL,0x99A54B24BB2D03F2ULL,
    0x5EB4691841135847ULL,0x1C4488F3E8F96ED4ULL,
    0x663D78FF90E185EFULL,0x24CD9914390BB37CULL,
    0xE3DCBB28C335E8C9ULL,0xA12C5AC36ADFDE5AULL,
    0x2F0E1EBA9EA36930ULL,0x6DFEFF5137495FA3ULL,
    0xAAEFDD6DCD770416ULL,0xE81F3C86649D3285ULL,
    0xF45BB4758C645C51ULL,0xB6AB559E258E6AC2ULL,
    0x71BA77A2DFB03177ULL,0x334A9649765A07E4ULL,
    0xBD68D2308226B08EULL,0xFF9833DB2BCC861DULL,
    0x388911E7D1F2DDA8ULL,0x7A79F00C7818EB3BULL,
    0xCC7AF1FF21C30BDEULL,0x8E8A101488293D4DULL,
    0x499B3228721766F8ULL,0x0B6BD3C3DBFD506BULL,
    0x854997BA2F81E701ULL,0xC7B97651866BD192ULL,
    0x00A8546D7C558A27ULL,0x4258B586D5BFBCB4ULL,
    0x5E1C3D753D46D260ULL,0x1CECDC9E94ACE4F3ULL,
    0xDBFDFEA26E92BF46ULL,0x990D1F49C77889D5ULL,
    0x172F5B3033043EBFULL,0x55DFBADB9AEE082CULL,
    0x92CE98E760D05399ULL,0xD03E790CC93A650AULL,
    0xAA478900B1228E31ULL,0xE8B768EB18C8B8A2ULL,
    0x2FA64AD7E2F6E317ULL,0x6D56AB3C4B1CD584ULL,
    0xE374EF45BF6062EEULL,0xA1840EAE168A547DULL,
    0x66952C92ECB40FC8ULL,0x2465CD79455E395BULL,
    0x3821458AADA7578FULL,0x7AD1A461044D611CULL,
    0xBDC0865DFE733AA9ULL,0xFF3067B657990C3AULL,
    0x711223CFA3E5BB50ULL,0x33E2C2240A0F8DC3ULL,
    0xF4F3E018F031D676ULL,0xB60301F359DBE0E5ULL,
    0xDA050215EA6C212FULL,0x98F5E3FE438617BCULL,
    0x5FE4C1C2B9B84C09ULL,0x1D14202910527A9AULL,
    0x93366450E42ECDF0ULL,0xD1C685BB4DC4FB63ULL,
    0x16D7A787B7FAA0D6ULL,0x5427466C1E109645ULL,
    0x4863CE9FF6E9F891ULL,0x0A932F745F03CE02ULL,
    0xCD820D48A53D95B7ULL,0x8F72ECA30CD7A324ULL,
    0x0150A8DAF8AB144EULL,0x43A04931514122DDULL,
    0x84B16B0DAB7F7968ULL,0xC6418AE602954FFBULL,
    0xBC387AEA7A8DA4C0ULL,0xFEC89B01D3679253ULL,
    0x39D9B93D2959C9E6ULL,0x7B2958D680B3FF75ULL,
    0xF50B1CAF74CF481FULL,0xB7FBFD44DD257E8CULL,
    0x70EADF78271B2539ULL,0x321A3E938EF113AAULL,
    0x2E5EB66066087D7EULL,0x6CAE578BCFE24BEDULL,
    0xABBF75B735DC1058ULL,0xE94F945C9C3626CBULL,
    0x676DD025684A91A1ULL,0x259D31CEC1A0A732ULL,
    0xE28C13F23B9EFC87ULL,0xA07CF2199274CA14ULL,
    0x167FF3EACBAF2AF1ULL,0x548F120162451C62ULL,
    0x939E303D987B47D7ULL,0xD16ED1D631917144ULL,
    0x5F4C95AFC5EDC62EULL,0x1DBC74446C07F0BDULL,
    0xDAAD56789639AB08ULL,0x985DB7933FD39D9BULL,
    0x84193F60D72AF34FULL,0xC6E9DE8B7EC0C5DCULL,
    0x01F8FCB784FE9E69ULL,0x43081D5C2D14A8FAULL,
    0xCD2A5925D9681F90ULL,0x8FDAB8CE70822903ULL,
    0x48CB9AF28ABC72B6ULL,0x0A3B7B1923564425ULL,
    0x70428B155B4EAF1EULL,0x32B26AFEF2A4998DULL,
    0xF5A348C2089AC238ULL,0xB753A929A170F4ABULL,
    0x3971ED50550C43C1ULL,0x7B810CBBFCE67552ULL,
    0xBC902E8706D82EE7ULL,0xFE60CF6CAF321874ULL,
    0xE224479F47CB76A0ULL,0xA0D4A674EE214033ULL,
    0x67C58448141F1B86ULL,0x253565A3BDF52D15ULL,
    0xAB1721DA49899A7FULL,0xE9E7C031E063ACECULL,
    0x2EF6E20D1A5DF759ULL,0x6C0603E6B3B7C1CAULL,
    0xF6FAE5C07D3274CDULL,0xB40A042BD4D8425EULL,
    0x731B26172EE619EBULL,0x31EBC7FC870C2F78ULL,
    0xBFC9838573709812ULL,0xFD39626EDA9AAE81ULL,
    0x3A28405220A4F534ULL,0x78D8A1B9894EC3A7ULL,
    0x649C294A61B7AD73ULL,0x266CC8A1C85D9BE0ULL,
    0xE17DEA9D3263C055ULL,0xA38D0B769B89F6C6ULL,
    0x2DAF4F0F6FF541ACULL,0x6F5FAEE4C61F773FULL,
    0xA84E8CD83C212C8AULL,0xEABE6D3395CB1A19ULL,
    0x90C79D3FEDD3F122ULL,0xD2377CD44439C7B1ULL,
    0x15265EE8BE079C04ULL,0x57D6BF0317EDAA97ULL,
    0xD9F4FB7AE3911DFDULL,0x9B041A914A7B2B6EULL,
    0x5C1538ADB04570DBULL,0x1EE5D94619AF4648ULL,
    0x02A151B5F156289CULL,0x4051B05E58BC1E0FULL,
    0x87409262A28245BAULL,0xC5B073890B687329ULL,
    0x4B9237F0FF14C443ULL,0x0962D61B56FEF2D0ULL,
    0xCE73F427ACC0A965ULL,0x8C8315CC052A9FF6ULL,
    0x3A80143F5CF17F13ULL,0x7870F5D4F51B4980ULL,
    0xBF61D7E80F251235ULL,0xFD913603A6CF24A6ULL,
    0x73B3727A52B393CCULL,0x31439391FB59A55FULL,
    0xF652B1AD0167FEEAULL,0xB4A25046A88DC879ULL,
    0xA8E6D8B54074A6ADULL,0xEA16395EE99E903EULL,
    0x2D071B6213A0CB8BULL,0x6FF7FA89BA4AFD18ULL,
    0xE1D5BEF04E364A72ULL,0xA3255F1BE7DC7CE1ULL,
    0x64347D271DE22754ULL,0x26C49CCCB40811C7ULL,
    0x5CBD6CC0CC10FAFCULL,0x1E4D8D2B65FACC6FULL,
    0xD95CAF179FC497DAULL,0x9BAC4EFC362EA149ULL,
    0x158E0A85C2521623ULL,0x577EEB6E6BB820B0ULL,
    0x906FC95291867B05ULL,0xD29F28B9386C4D96ULL,
    0xCEDBA04AD0952342ULL,0x8C2B41A1797F15D1ULL,
    0x4B3A639D83414E64ULL,0x09CA82762AAB78F7ULL,
    0x87E8C60FDED7CF9DULL,0xC51827E4773DF90EULL,
    0x020905D88D03A2BBULL,0x40F9E43324E99428ULL,
    0x2CFFE7D5975E55E2ULL,0x6E0F063E3EB46371ULL,
    0xA91E2402C48A38C4ULL,0xEBEEC5E96D600E57ULL,
    0x65CC8190991CB93DULL,0x273C607B30F68FAEULL,
    0xE02D4247CAC8D41BULL,0xA2DDA3AC6322E288ULL,
    0xBE992B5F8BDB8C5CULL,0xFC69CAB42231BACFULL,
    0x3B78E888D80FE17AULL,0x7988096371E5D7E9ULL,
    0xF7AA4D1A85996083ULL,0xB55AACF12C735610ULL,
    0x724B8ECDD64D0DA5ULL,0x30BB6F267FA73B36ULL,
    0x4AC29F2A07BFD00DULL,0x08327EC1AE55E69EULL,
    0xCF235CFD546BBD2BULL,0x8DD3BD16FD818BB8ULL,
    0x03F1F96F09FD3CD2ULL,0x41011884A0170A41ULL,
    0x86103AB85A2951F4ULL,0xC4E0DB53F3C36767ULL,
    0xD8A453A01B3A09B3ULL,0x9A54B24BB2D03F20ULL,
    0x5D45907748EE6495ULL,0x1FB5719CE1045206ULL,
    0x919735E51578E56CULL,0xD367D40EBC92D3FFULL,
    0x1476F63246AC884AULL,0x568617D9EF46BED9ULL,
    0xE085162AB69D5E3CULL,0xA275F7C11F7768AFULL,
    0x6564D5FDE549331AULL,0x279434164CA30589ULL,
    0xA9B6706FB8DFB2E3ULL,0xEB46918411358470ULL,
    0x2C57B3B8EB0BDFC5ULL,0x6EA7525342E1E956ULL,
    0x72E3DAA0AA188782ULL,0x30133B4B03F2B111ULL,
    0xF7021977F9CCEAA4ULL,0xB5F2F89C5026DC37ULL,
    0x3BD0BCE5A45A6B5DULL,0x79205D0E0DB05DCEULL,
    0xBE317F32F78E067BULL,0xFCC19ED95E6430E8ULL,
    0x86B86ED5267CDBD3ULL,0xC4488F3E8F96ED40ULL,
    0x0359AD0275A8B6F5ULL,0x41A94CE9DC428066ULL,
    0xCF8B0890283E370CULL,0x8D7BE97B81D4019FULL,
    0x4A6ACB477BEA5A2AULL,0x089A2AACD2006CB9ULL,
    0x14DEA25F3AF9026DULL,0x562E43B4931334FEULL,
    0x913F6188692D6F4BULL,0xD3CF8063C0C759D8ULL,
    0x5DEDC41A34BBEEB2ULL,0x1F1D25F19D51D821ULL,
    0xD80C07CD676F8394ULL,0x9AFCE626CE85B507ULL,
    };
  
    while (len > 0)
    {
        crc = table[*data ^ (unsigned char)(crc >> 56)] ^ (crc << 8);
        data++;
        len--;
    }
    return crc;
}


igtl_uint32 igtl_export igtl_nanosec_to_frac(igtl_uint32 nanosec)
{

  igtl_uint32 base = 1000000000; /*10^9*/

  igtl_uint32 mask = 0x80000000;
  igtl_uint32 r    = 0x00000000;

  do
    {
      base >>= 1;
      if (nanosec > base)
        {
          r |= mask;
          nanosec -= base;
        }
      mask >>= 1;
    }
  while (mask);

  return r;
}


igtl_uint32 igtl_export igtl_frac_to_nanosec(igtl_uint32 frac)
{
  igtl_uint32 base = 1000000000; /*10^9*/

  igtl_uint32 mask = 0x80000000;
  igtl_uint32 r    = 0x00000000;

  do
    {
      base >>= 1;
      r += (frac & mask)? base : 0;
      mask >>= 1;
    } while (mask);

  return r;
}


void igtl_export igtl_message_dump_hex(FILE* stream, const void* message, int bytes)
{
  /* Print first 256 bytes as HEX values in STDERR for debug */

  unsigned char* p;
  int row;
  int cols_in_last_row;
  int i;
  int j;

  p = (unsigned char*)message;
  row = bytes / 16;
  cols_in_last_row = bytes % 16;

  for (i = 0; i < row; i ++)
    {
    for (j = 0; j < 16; j ++)
      {
      fprintf(stream, "%02x ", *p);
      p++;
      }
    fprintf(stream, "\n");
    }

  for (j = 0; j < cols_in_last_row; j ++)
    {
    fprintf(stream, "%02x ", p[i]);
    }
  fprintf(stream, "\n");
  
}


/* Calculate number of bytes / element */
igtl_uint32 igtl_export igtl_get_scalar_size(int type)
{
  igtl_uint32 bytes;

  switch (type)
    {
    case IGTL_SCALAR_INT8:
    case IGTL_SCALAR_UINT8:
      bytes = 1;
      break;
    case IGTL_SCALAR_INT16:
    case IGTL_SCALAR_UINT16:
      bytes = 2;
      break;
    case IGTL_SCALAR_INT32:
    case IGTL_SCALAR_UINT32:
    case IGTL_SCALAR_FLOAT32:
      bytes = 4;
      break;
    case IGTL_SCALAR_FLOAT64:
      bytes = 8;
      break;
    case IGTL_SCALAR_COMPLEX:
      bytes = 16;
      break;
    default:
      bytes = 0;
      break;
    }

  return bytes;
}
