hecmw_vis_endian.h

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/*****************************************************************************
 * Copyright (c) 2019 FrontISTR Commons
 * This software is released under the MIT License, see LICENSE.txt
 *****************************************************************************/
 
#ifndef HECMW_VIS_ENDIAN_H_INCLUDED
#define HECMW_VIS_ENDIAN_H_INCLUDED
 
extern int IsLittleEndian(void);
 
/******************************************************************************
  FUNCTION: SwapEndian
  PURPOSE: Swap the byte order of a structure
  EXAMPLE: float F=123.456;; SWAP_FLOAT(F);
 ******************************************************************************/
 
#define SWAP_SHORT(Var) Var = *(short*)SwapEndian((void*)&Var, sizeof(short))
#define SWAP_INT(Var) Var   = *(int*)SwapEndian((void*)&Var, sizeof(int))
#define SWAP_USHORT(Var) \
  Var = *(unsigned short*)SwapEndian((void*)&Var, sizeof(short))
#define SWAP_LONG(Var) Var = *(long*)SwapEndian((void*)&Var, sizeof(long))
#define SWAP_ULONG(Var) \
  Var = *(unsigned long*)SwapEndian((void*)&Var, sizeof(long))
#define SWAP_RGB(Var) Var    = *(int*)SwapEndian((void*)&Var, 3)
#define SWAP_FLOAT(Var) Var  = *(float*)SwapEndian((void*)&Var, sizeof(float))
#define SWAP_DOUBLE(Var) Var = *(double*)SwapEndian((void*)&Var, sizeof(double))
 
extern void* SwapEndian(void* Addr, const int Nb);
 
#endif /* HECMW_VIS_ENDIAN_H_INCLUDED */