rtxBigNumber.h File Reference

#include "rtxsrc/rtxContext.h"

Go to the source code of this file.

Functions
int	rtxAddBigNum (const OSOCTET *a, OSSIZE szA, const OSOCTET *b, OSSIZE szB, OSOCTET *c, OSSIZE szC)
	Addition big numbers: a + b = c. More...
int	rtxSubBigNum (const OSOCTET *a, OSSIZE szA, const OSOCTET *b, OSSIZE szB, OSOCTET *c, OSSIZE szC)
	Substraction big numbers: a - b = c. More...
int	rtxMulBigNum (const OSOCTET *a, OSSIZE szA, const OSOCTET *b, OSSIZE szB, OSOCTET *c, OSSIZE szC)
	Multiplication big numbers: a * b = c. More...
int	rtxDivRemBigNum (const OSOCTET *a, OSSIZE szA, const OSOCTET *b, OSSIZE szB, OSOCTET *c, OSSIZE szC, OSOCTET *rem, OSSIZE szRem)
	Division big numbers with reminder: a / b = c. More...
int	rtxDivBigNum (const OSOCTET *a, OSSIZE szA, const OSOCTET *b, OSSIZE szB, OSOCTET *c, OSSIZE szC)
	Division big numbers: a / b = c. More...
int	rtxModBigNum (const OSOCTET *a, OSSIZE szA, const OSOCTET *b, OSSIZE szB, OSOCTET *rem, OSSIZE szRem)
	Division by module big numbers: a % b = rem. More...
int	rtxBigNumToStr (const OSOCTET *a, OSSIZE szA, char *str, OSSIZE szStr)
	Convert big number to string. More...
int	rtxStrToBigNum (const char *str, OSOCTET *a, OSSIZE szA)
	Convert string to big number. More...

Function Documentation

rtxAddBigNum()

int rtxAddBigNum	(	const OSOCTET *	a,
		OSSIZE	szA,
		const OSOCTET *	b,
		OSSIZE	szB,
		OSOCTET *	c,
		OSSIZE	szC
	)

Addition big numbers: a + b = c.

Parameters

a	First addend.
szA	Length of first addend in octets.
b	Second addend.
szB	Length of second addend in octets.
c	Sum.
szC	Length of sum buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.

rtxBigNumToStr()

int rtxBigNumToStr	(	const OSOCTET *	a,
		OSSIZE	szA,
		char *	str,
		OSSIZE	szStr
	)

Convert big number to string.

Parameters

a	Number.
szA	Length of number in octets.
str	Result string.
szStr	Length of string buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.

rtxDivBigNum()

int rtxDivBigNum	(	const OSOCTET *	a,
		OSSIZE	szA,
		const OSOCTET *	b,
		OSSIZE	szB,
		OSOCTET *	c,
		OSSIZE	szC
	)

Division big numbers: a / b = c.

Parameters

a	Divident.
szA	Length of divident in octets.
b	Divisor.
szB	Length of divisor in octets.
c	Quotient.
szC	Length of quotient buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.

rtxDivRemBigNum()

int rtxDivRemBigNum	(	const OSOCTET *	a,
		OSSIZE	szA,
		const OSOCTET *	b,
		OSSIZE	szB,
		OSOCTET *	c,
		OSSIZE	szC,
		OSOCTET *	rem,
		OSSIZE	szRem
	)

Division big numbers with reminder: a / b = c.

Parameters

a	Divident.
szA	Length of divident in octets.
b	Divisor.
szB	Length of divisor in octets.
c	Quotient.
szC	Length of quotient buffer in octets.
rem	Reminder.
szRem	Length of reminder buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.

rtxModBigNum()

int rtxModBigNum	(	const OSOCTET *	a,
		OSSIZE	szA,
		const OSOCTET *	b,
		OSSIZE	szB,
		OSOCTET *	rem,
		OSSIZE	szRem
	)

Division by module big numbers: a % b = rem.

Parameters

a	Divident.
szA	Length of divident in octets.
b	Divisor.
szB	Length of divisor in octets.
rem	Reminder.
szRem	Length of reminder buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.

rtxMulBigNum()

int rtxMulBigNum	(	const OSOCTET *	a,
		OSSIZE	szA,
		const OSOCTET *	b,
		OSSIZE	szB,
		OSOCTET *	c,
		OSSIZE	szC
	)

Multiplication big numbers: a * b = c.

Parameters

a	Multiplicand.
szA	Length of multiplicand in octets.
b	Multiplier.
szB	Length of multiplier in octets.
c	Product.
szC	Length of product buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.

rtxStrToBigNum()

int rtxStrToBigNum	(	const char *	str,
		OSOCTET *	a,
		OSSIZE	szA
	)

Convert string to big number.

Parameters

str	Input null terminated string.
a	Result number.
szA	Length of number buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.

rtxSubBigNum()

int rtxSubBigNum	(	const OSOCTET *	a,
		OSSIZE	szA,
		const OSOCTET *	b,
		OSSIZE	szB,
		OSOCTET *	c,
		OSSIZE	szC
	)

Substraction big numbers: a - b = c.

Parameters

a	Minuend.
szA	Length of minuend in octets.
b	Substrahend.
szB	Length of substrahend in octets.
c	Difference.
szC	Length of difference buffer in octets.

Returns

Status of the operation. Zero if successful; a negative status code if overflow.