///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
 *  Contains custom types.
 *  \file  	IceTypes.h
 *  \author  	Pierre Terdiman
 *  \date  	April, 4, 2000
 */
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Guard
#ifndef __ICETYPES_H__
#define __ICETYPES_H__

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Things to help us compile on non-windows platforms

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

  #define USE_HANDLE_MANAGER

  // Constants
  #define  PI					3.1415926535897932384626433832795028841971693993751f	//!< PI
  #define  HALFPI				1.57079632679489661923f									//!< 0.5 * PI
  #define  TWOPI				6.28318530717958647692f									//!< 2.0 * PI
  #define  INVPI				0.31830988618379067154f									//!< 1.0 / PI

  #define  RADTODEG			57.2957795130823208768f									//!< 180.0 / PI, convert radians to degrees
  #define  DEGTORAD			0.01745329251994329577f									//!< PI / 180.0, convert degrees to radians

  #define  EXP					2.71828182845904523536f									//!< e
  #define  INVLOG2				3.32192809488736234787f									//!< 1.0 / log10(2)
  #define  LN2					0.693147180559945f										//!< ln(2)
  #define  INVLN2				1.44269504089f											//!< 1.0f / ln(2)

  #define  INV3				0.33333333333333333333f									//!< 1/3
  #define  INV6				0.16666666666666666666f									//!< 1/6
  #define  INV7				0.14285714285714285714f									//!< 1/7
  #define  INV9				0.11111111111111111111f									//!< 1/9
  #define  INV255				0.00392156862745098039f									//!< 1/255

  #define  SQRT2				1.41421356237f											//!< sqrt(2)
  #define  INVSQRT2			0.707106781188f											//!< 1 / sqrt(2)

  #define  SQRT3				1.73205080757f											//!< sqrt(3)
  #define  INVSQRT3			0.577350269189f											//!< 1 / sqrt(3)

  #define null  			0														//!< our own NULL pointer

  // Custom types used in ICE
  typedef signed char  		sbyte;		//!< sizeof(sbyte)	must be 1
  typedef unsigned char  	ubyte;		//!< sizeof(ubyte)	must be 1
  typedef signed short  	sword;		//!< sizeof(sword)	must be 2
  typedef unsigned short  	uword;		//!< sizeof(uword)	must be 2
  typedef signed int  		sdword;		//!< sizeof(sdword)	must be 4
  typedef unsigned int  	udword;		//!< sizeof(udword)	must be 4
  typedef signed __int64  	sqword;		//!< sizeof(sqword)	must be 8
  typedef unsigned __int64  uqword;		//!< sizeof(uqword)	must be 8
  typedef float  			float32;	//!< sizeof(float32)	must be 4
  typedef double  			float64;	//!< sizeof(float64)	must be 4

  ICE_COMPILE_TIME_ASSERT(sizeof(ubyte)==1);
  ICE_COMPILE_TIME_ASSERT(sizeof(sbyte)==1);
  ICE_COMPILE_TIME_ASSERT(sizeof(sword)==2);
  ICE_COMPILE_TIME_ASSERT(sizeof(uword)==2);
  ICE_COMPILE_TIME_ASSERT(sizeof(udword)==4);
  ICE_COMPILE_TIME_ASSERT(sizeof(sdword)==4);
  ICE_COMPILE_TIME_ASSERT(sizeof(uqword)==8);
  ICE_COMPILE_TIME_ASSERT(sizeof(sqword)==8);

  //! TO BE DOCUMENTED
  #define DECLARE_ICE_HANDLE(name)  struct name##__ { int unused; }; typedef struct name##__ *name

  typedef udword  			DynID;		//!< Dynamic identifier
#ifdef USE_HANDLE_MANAGER
  typedef udword  			KID;		//!< Kernel ID
//  DECLARE_ICE_HANDLE(KID);
#else
  typedef uword  			KID;		//!< Kernel ID
#endif
  typedef udword  			RTYPE;		//!< Relationship-type (!) between owners and references
  #define  INVALID_ID			0xffffffff	//!< Invalid dword ID (counterpart of null pointers)
#ifdef USE_HANDLE_MANAGER
  #define  INVALID_KID			0xffffffff	//!< Invalid Kernel ID
#else
  #define  INVALID_KID			0xffff		//!< Invalid Kernel ID
#endif
  #define  INVALID_NUMBER		0xDEADBEEF	//!< Standard junk value

  // Define BOOL if needed
  #ifndef BOOL
  typedef int  BOOL;						//!< Another boolean type.
  #endif

  //! Union of a float and a sdword
  typedef union {
    float	f;							//!< The float
    sdword	d;							//!< The integer
  }scell;

  //! Union of a float and a udword
  typedef union {
    float	f;							//!< The float
    udword	d;							//!< The integer
  }ucell;

  // Type ranges
  #define  MAX_SBYTE				0x7f						//!< max possible sbyte value
  #define  MIN_SBYTE				0x80						//!< min possible sbyte value
  #define  MAX_UBYTE				0xff						//!< max possible ubyte value
  #define  MIN_UBYTE				0x00						//!< min possible ubyte value
  #define  MAX_SWORD				0x7fff						//!< max possible sword value
  #define  MIN_SWORD				0x8000						//!< min possible sword value
  #define  MAX_UWORD				0xffff						//!< max possible uword value
  #define  MIN_UWORD				0x0000						//!< min possible uword value
  #define  MAX_SDWORD				0x7fffffff					//!< max possible sdword value
  #define  MIN_SDWORD				0x80000000					//!< min possible sdword value
  #define  MAX_UDWORD				0xffffffff					//!< max possible udword value
  #define  MIN_UDWORD				0x00000000					//!< min possible udword value
  #define  MAX_FLOAT				FLT_MAX						//!< max possible float value
  #define  MIN_FLOAT				(-FLT_MAX)					//!< min possible loat value
  #define IEEE_1_0  			0x3f800000					//!< integer representation of 1.0
  #define IEEE_255_0  			0x437f0000					//!< integer representation of 255.0
  #define IEEE_MAX_FLOAT  		0x7f7fffff					//!< integer representation of MAX_FLOAT
  #define IEEE_MIN_FLOAT  		0xff7fffff					//!< integer representation of MIN_FLOAT
  #define IEEE_UNDERFLOW_LIMIT  0x1a000000

  #define ONE_OVER_RAND_MAX  	(1.0f / float(RAND_MAX))	//!< Inverse of the max possible value returned by rand()

#ifndef _WIN32
  typedef int  				(__stdcall* PROC)();			//!< A standard procedure call.
#endif
  typedef bool  			(*ENUMERATION)(udword value, udword param, udword context);	//!< ICE standard enumeration call
  typedef  void**				VTABLE;							//!< A V-Table.

  #undef  	MIN
  #undef  	MAX
  #define  	MIN(a, b)       ((a) < (b) ? (a) : (b))			//!< Returns the min value between a and b
  #define  	MAX(a, b)       ((a) > (b) ? (a) : (b))			//!< Returns the max value between a and b
  #define  	MAXMAX(a,b,c)   ((a) > (b) ? MAX (a,c) : MAX (b,c))	//!<	Returns the max value between a, b and c

  template<class T>  inline_ const T&	TMin	(const T& a, const T& b)	{ return b < a ? b : a;	}
  template<class T>  inline_ const T&	TMax	(const T& a, const T& b)	{ return a < b ? b : a;	}
  template<class T>  inline_ void		TSetMin	(T& a, const T& b)			{ if(a>b)	a = b;		}
  template<class T>  inline_ void		TSetMax	(T& a, const T& b)			{ if(a<b)	a = b;		}

  #define  	SQR(x)			((x)*(x))						//!< Returns x square
  #define  	CUBE(x)			((x)*(x)*(x))					//!< Returns x cube

  #define  	AND		&										//!< ...
  #define  	OR		|										//!< ...
  #define  	XOR		^										//!< ...

  #define  	QUADRAT(x)		((x)*(x))						//!< Returns x square

#ifdef _WIN32
#   define srand48(x) srand((unsigned int) (x))
#  define srandom(x) srand((unsigned int) (x))
#  define random()   ((double) rand())
#   define drand48()  ((double) (((double) rand()) / ((double) RAND_MAX)))
#endif

#endif // __ICETYPES_H__
