epd.h

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#ifndef _EPD
#define _EPD

#ifdef __cplusplus
extern "C" {
#endif

/*---------------------------------------------------------------------------*/
/* Constant declarations                                                     */
/*---------------------------------------------------------------------------*/

#define EPD_MAX_BIN 1023
#define EPD_MAX_DEC 308
#define EPD_EXP_INF 0x7ff

/*---------------------------------------------------------------------------*/
/* Structure declarations                                                    */
/*---------------------------------------------------------------------------*/

#ifdef  EPD_BIG_ENDIAN
struct IeeeDoubleStruct {   /* BIG_ENDIAN */
  unsigned int sign: 1;
  unsigned int exponent: 11;
  unsigned int mantissa0: 20;
  unsigned int mantissa1: 32;
};
#else
struct IeeeDoubleStruct {   /* LITTLE_ENDIAN */
  unsigned int mantissa1: 32;
  unsigned int mantissa0: 20;
  unsigned int exponent: 11;
  unsigned int sign: 1;
};
#endif

#ifdef  EPD_BIG_ENDIAN
struct IeeeNanStruct {  /* BIG_ENDIAN */
  unsigned int sign: 1;
  unsigned int exponent: 11;
  unsigned int quiet_bit: 1;
  unsigned int mantissa0: 19;
  unsigned int mantissa1: 32;
};
#else
struct IeeeNanStruct {  /* LITTLE_ENDIAN */
  unsigned int mantissa1: 32;
  unsigned int mantissa0: 19;
  unsigned int quiet_bit: 1;
  unsigned int exponent: 11;
  unsigned int sign: 1;
};
#endif

union EpTypeUnion {
  double            value;
  struct IeeeDoubleStruct   bits;
  struct IeeeNanStruct      nan;
};

struct EpDoubleStruct {
  union EpTypeUnion     type;
  int               exponent;
};

/*---------------------------------------------------------------------------*/
/* Type declarations                                                         */
/*---------------------------------------------------------------------------*/
typedef struct EpDoubleStruct EpDouble;
typedef struct IeeeDoubleStruct IeeeDouble;
typedef struct IeeeNanStruct IeeeNan;
typedef union EpTypeUnion EpType;

/*---------------------------------------------------------------------------*/
/* Function prototypes                                                       */
/*---------------------------------------------------------------------------*/

extern EpDouble *EpdAlloc(void);
extern int EpdCmp(const char *key1, const char *key2);
extern void EpdFree(EpDouble *epd);
extern void EpdGetString(EpDouble *epd, char *str);
extern void EpdConvert(double value, EpDouble *epd);
extern void EpdMultiply(EpDouble *epd1, double value);
extern void EpdMultiply2(EpDouble *epd1, EpDouble *epd2);
extern void EpdMultiply2Decimal(EpDouble *epd1, EpDouble *epd2);
extern void EpdMultiply3(EpDouble *epd1, EpDouble *epd2, EpDouble *epd3);
extern void EpdMultiply3Decimal(EpDouble *epd1, EpDouble *epd2, EpDouble *epd3);
extern void EpdDivide(EpDouble *epd1, double value);
extern void EpdDivide2(EpDouble *epd1, EpDouble *epd2);
extern void EpdDivide3(EpDouble *epd1, EpDouble *epd2, EpDouble *epd3);
extern void EpdAdd(EpDouble *epd1, double value);
extern void EpdAdd2(EpDouble *epd1, EpDouble *epd2);
extern void EpdAdd3(EpDouble *epd1, EpDouble *epd2, EpDouble *epd3);
extern void EpdSubtract(EpDouble *epd1, double value);
extern void EpdSubtract2(EpDouble *epd1, EpDouble *epd2);
extern void EpdSubtract3(EpDouble *epd1, EpDouble *epd2, EpDouble *epd3);
extern void EpdPow2(int n, EpDouble *epd);
extern void EpdPow2Decimal(int n, EpDouble *epd);
extern void EpdNormalize(EpDouble *epd);
extern void EpdNormalizeDecimal(EpDouble *epd);
extern void EpdGetValueAndDecimalExponent(EpDouble *epd, double *value, int *exponent);
extern int EpdGetExponent(double value);
extern int EpdGetExponentDecimal(double value);
extern void EpdMakeInf(EpDouble *epd, int sign);
extern void EpdMakeZero(EpDouble *epd, int sign);
extern void EpdMakeNan(EpDouble *epd);
extern void EpdCopy(EpDouble *from, EpDouble *to);
extern int EpdIsInf(EpDouble *epd);
extern int EpdIsZero(EpDouble *epd);
extern int EpdIsNan(EpDouble *epd);
extern int EpdIsNanOrInf(EpDouble *epd);
extern int IsInfDouble(double value);
extern int IsNanDouble(double value);
extern int IsNanOrInfDouble(double value);

#ifdef __cplusplus
}
#endif

#endif /* _EPD */