Data Structures
struct	XREAL
	Extended real type that can contain a calculator real. More...
struct	conversion_data
	Data structure used to convert an XREAL number to string. More...
Defines
#define	xr_xr2uint(num) ((unsigned int)xr_xr2ullong(num))
#define	LN2_LN10 1292913987LL
	Constant LN(2)/LN(10) expressed as a 64-bit integer in fixed point, for internal use.
Functions
void	xr_10pow (int exp10, XREAL *value)
	Power of 10 as an XREAL number.
char *	xr_atoxr (const char str, XREAL res)
	Convert a string to an XREAL number.
char *	xr_xrtoa (XREAL number, struct conversion_data data)
	Convert an XREAL number to string format.
void	xr_base2 (XREAL base10, XREAL res)
	Change internal representation to a base-2 system.
void	xr_base10 (XREAL base2, XREAL res)
	Change internal representation to a base-10 system.
void	xr_div (XREAL num, XREAL div, XREAL *result)
	Basic operator: division.
void	xr_mul (XREAL num1, XREAL num2, XREAL *result)
	Basic operator: multiplication.
void	xr_add (XREAL num1, XREAL num2, XREAL *result)
	Basic operator: addition.
void	xr_sub (XREAL num1, XREAL num2, XREAL *result)
	Basic operator: Subtraction.
void	xr_double2xr (double val, XREAL *num)
	Convert a double to an XREAL number.
void	xr_int2xr (int val, XREAL *num)
	Convert a 32-bit integer to an XREAL number.
void	xr_llong2xr (long long val, XREAL *num)
	Convert a 64-bit integer to an XREAL number.
void	xr_uint2xr (unsigned int val, XREAL *num)
	Convert a 32-bit unsigned integer to an XREAL number.
void	xr_ullong2xr (unsigned long long val, XREAL *num)
	Convert a 64-bit integer to an XREAL number.
double	xr_xr2double (XREAL *num)
	Convert an XREAL number to 'double' format.
long long	xr_xr2llong (XREAL *num)
	Convert an XREAL number to 64-bit integer in 'long long' format.
int	xr_xr2int (XREAL *num)
	Convert an XREAL number to 32-bit integer.
unsigned long long	xr_xr2ullong (XREAL *num)
	Convert an XREAL number to unsigned 64-bit integer in 'unsigned long long' format.
int	xr_getbasedigit (char num, int base)
	Internal use.
unsigned long long	xr_getbaselimit (int base)
	Internal use.
int	xr_getdigits10 (XREAL xr, char buffer)
	Internal use.
int	xr_getdigits (XREAL num, char buffer, int base)
	Internal use.
int	xr_getnumbits (int number)
	Internal use.

Define Documentation

#define LN2_LN10 1292913987LL

Constant LN(2)/LN(10) expressed as a 64-bit integer in fixed point, for internal use.

Definition at line 350 of file extreal.h.

#define xr_xr2uint ( num ) ((unsigned int)xr_xr2ullong(num))

Definition at line 53 of file extreal.h.

Function Documentation

void xr_10pow	(	int	exp10,
		XREAL *	value
	)

Power of 10 as an XREAL number.

This function returns 10 to the indicated power.

Parameters:

exp10	Desired exponent
value	Pointer to an XREAL to be filled with the result.

Returns:: The XREAL number (10^exp10) written to the given pointer.

See also:: XREAL

void xr_add	(	XREAL *	num1,
		XREAL *	num2,
		XREAL *	result
	)

Basic operator: addition.

This function calculates num1 + num2 and stores the result.

Parameters:

num1	Pointer to an XREAL number
num2	Pointer to an XREAL number
result	Pointer to an XREAL to be filled with the result. Can be the same as one of the operands.

Returns:: The result of the operation is written at the given result structure.

See also:: XREAL xr_mul xr_sub xr_div

char* xr_atoxr	(	const char *	str,
		XREAL *	res
	)

Convert a string to an XREAL number.

This function converts a number stored in text format to the extended real format.

Parameters:

str	String with a valid number
res	Pointer to an XREAL to be filled with the result.

Returns:: A pointer into the given string, pointing to the character after the last valid character considered part of the number. The converted number is written at the given structure.

See also:: xr_xrtoa

void xr_base10	(	XREAL *	base2,
		XREAL *	res
	)

Change internal representation to a base-10 system.

This function converts a number stored in base-2 format to the base-10 format.

Parameters:

base2	Pointer to an XREAL number stored in base-2 format
res	Pointer to an XREAL to be filled with the result.

Returns:: Number with a right justified mantissa with base-10 exponent (number = mantissa * 10^exponent) The converted number is written at the given structure.

See also:: XREAL xr_base2

void xr_base2	(	XREAL *	base10,
		XREAL *	res
	)

Change internal representation to a base-2 system.

This function converts a number stored in base-10 format to the base-2 format.

Parameters:

base10	Pointer to an XREAL number stored in base-10 format
res	Pointer to an XREAL to be filled with the result.

Returns:: Number with a left justified mantissa with base-2 exponent (number = mantissa * 2^(exponent-63) The converted number is written at the given structure.

See also:: XREAL xr_base10

void xr_div	(	XREAL *	num,
		XREAL *	div,
		XREAL *	result
	)

Basic operator: division.

This function calculates numerator / denominator and stores the result.

Parameters:

num	Pointer to an XREAL number (numerator)
div	Pointer to an XREAL number (denominator)
result	Pointer to an XREAL to be filled with the result. Can be the same as one of the operands.

Returns:: The result of the operation is written at the given result structure.

See also:: XREAL xr_add xr_sub xr_mul

void xr_double2xr	(	double	val,
		XREAL *	num
	)

Convert a double to an XREAL number.

This function converts a number stored in 'double' format to the extended real format.

Parameters:

val	Number to convert
num	Pointer to an XREAL to be filled with the result.

Returns:: The converted number is written at the given structure.

See also:: xr_int2xr xr_llong2xr xr_uint2xr xr_ullong2xr

int xr_getbasedigit	(	char	num,
		int	base
	)

Internal use.

unsigned long long xr_getbaselimit ( int base )

Internal use.

int xr_getdigits	(	XREAL *	num,
		char *	buffer,
		int	base
	)

Internal use.

int xr_getdigits10	(	XREAL *	xr,
		char *	buffer
	)

Internal use.

int xr_getnumbits ( int number )

Internal use.

void xr_int2xr	(	int	val,
		XREAL *	num
	)

Convert a 32-bit integer to an XREAL number.

This function converts a number stored in 'int' format to the extended real format.

Parameters:

val	Number to convert
num	Pointer to an XREAL to be filled with the result.

Returns:: The converted number is written at the given structure.

See also:: xr_double2xr xr_llong2xr xr_uint2xr xr_ullong2xr

void xr_llong2xr	(	long long	val,
		XREAL *	num
	)

Convert a 64-bit integer to an XREAL number.

This function converts a number stored in 'int' format to the extended real format.

Parameters:

val	Number to convert
num	Pointer to an XREAL to be filled with the result.

Returns:: The converted number is written at the given structure.

See also:: xr_double2xr xr_int2xr xr_uint2xr xr_ullong2xr

void xr_mul	(	XREAL *	num1,
		XREAL *	num2,
		XREAL *	result
	)

Basic operator: multiplication.

This function calculates num1 * num2 and stores the result.

Parameters:

num1	Pointer to an XREAL number
num2	Pointer to an XREAL number
result	Pointer to an XREAL to be filled with the result. Can be the same as one of the operands.

Returns:: The result of the operation is written at the given result structure.

See also:: XREAL xr_add xr_sub xr_div

void xr_sub	(	XREAL *	num1,
		XREAL *	num2,
		XREAL *	result
	)

Basic operator: Subtraction.

This function calculates num1 - num2 and stores the result.

Parameters:

num1	Pointer to an XREAL number
num2	Pointer to an XREAL number
result	Pointer to an XREAL to be filled with the result. Can be the same as one of the operands.

Returns:: The result of the operation is written at the given result structure.

See also:: XREAL xr_add xr_mul xr_div

void xr_uint2xr	(	unsigned int	val,
		XREAL *	num
	)

Convert a 32-bit unsigned integer to an XREAL number.

This function converts a number stored in 'unsigned int' format to the extended real format.

Parameters:

val	Number to convert
num	Pointer to an XREAL to be filled with the result.

Returns:: The converted number is written at the given structure.

See also:: xr_double2xr xr_llong2xr xr_int2xr xr_ullong2xr

void xr_ullong2xr	(	unsigned long long	val,
		XREAL *	num
	)

Convert a 64-bit integer to an XREAL number.

This function converts a number stored in 'long long' format to the extended real format.

Parameters:

val	Number to convert
num	Pointer to an XREAL to be filled with the result.

Returns:: The converted number is written at the given structure.

See also:: xr_double2xr xr_llong2xr xr_int2xr xr_uint2xr

double xr_xr2double ( XREAL * num )

Convert an XREAL number to 'double' format.

This function converts an XREAL number to the standard C 'double' format.

Parameters:

num	Number to convert

Returns:: The converted number.

See also:: xr_xr2llong xr_xr2int xr_xr2uint xr_xr2ullong

int xr_xr2int ( XREAL * num )

Convert an XREAL number to 32-bit integer.

This function converts an XREAL number to the standard C 'int' format.

Parameters:

num	Number to convert

Returns:: The converted number.

See also:: xr_xr2double xr_xr2llong xr_xr2uint xr_xr2ullong

long long xr_xr2llong ( XREAL * num )

Convert an XREAL number to 64-bit integer in 'long long' format.

This function converts an XREAL number to the standard C 'long long' format.

Parameters:

num	Number to convert

Returns:: The converted number.

See also:: xr_xr2double xr_xr2int xr_xr2uint xr_xr2ullong

unsigned long long xr_xr2ullong ( XREAL * num )

Convert an XREAL number to unsigned 64-bit integer in 'unsigned long long' format.

This function converts an XREAL number to the standard C 'unsigned long long' format.

Parameters:

num	Number to convert

Returns:: The converted number.

See also:: xr_xr2double xr_xr2int xr_xr2uint xr_xr2llong

char* xr_xrtoa	(	XREAL *	number,
		struct conversion_data *	data
	)

Convert an XREAL number to string format.

This function converts a number in XREAL format into a string.

Parameters:

number	The number to be converted
data	Pointer to a structure with all formatting options needed for the conversion.

Returns:: A pointer to a newly allocated string (allocated with malloc, the user is responsible to free the memory block after use). The converted number follows all the formatting specifications given in the 'data' argument.

See also:: xr_atoxr conversion_data

extreal.h File Reference

Data Structures

Defines

Functions

Define Documentation

Function Documentation