rtxBigInt.h File Reference

#include "rtxsrc/rtxContext.h"

Go to the source code of this file.

Functions
EXTERNRT void	rtxBigIntInit (OSBigInt *pInt)
	This function initializes a big integer structure.
EXTERNRT int	rtxBigIntSetStr (OSCTXT *pctxt, OSBigInt *pInt, const char *value, int radix)
	This function sets a big integer binary value from a null-terminated string.
EXTERNRT int	rtxBigIntSetStrn (OSCTXT *pctxt, OSBigInt *pInt, const char *value, OSSIZE len, int radix)
	This function sets a big integer binary value from a character string using the given number of characters.
EXTERNRT int	rtxBigIntSetInt64 (OSCTXT *pctxt, OSBigInt *pInt, OSINT64 value)
	This function sets a big integer binary value from a signed 64-bit integer value.
EXTERNRT int	rtxBigIntSetUInt64 (OSCTXT *pctxt, OSBigInt *pInt, OSUINT64 value)
	This function sets a big integer binary value from an unsigned 64-bit integer value.
EXTERNRT int	rtxBigIntSetBytes (OSCTXT *pctxt, OSBigInt *pInt, OSOCTET *value, OSSIZE vallen)
	This function sets a big integer binary value from a byte array.
EXTERNRT OSSIZE	rtxBigIntGetDataLen (const OSBigInt *pInt)
	This function is used to get the size in bytes of the binary big integer data value.
EXTERNRT int	rtxBigIntGetData (OSCTXT *pctxt, const OSBigInt *pInt, OSOCTET *buffer, OSSIZE bufSize)
	This function is used to get the binary big integer data value in a byte array.
EXTERNRT OSSIZE	rtxBigIntDigitsNum (const OSBigInt *pInt, int radix)
	This function is used to get the number of digits in the binary big integer data value based on radix.
EXTERNRT int	rtxBigIntCopy (OSCTXT *pctxt, const OSBigInt *pSrc, OSBigInt *pDst)
	This function is used to copy a big integer data value from one structure to another.
EXTERNRT int	rtxBigIntFastCopy (OSCTXT *pctxt, const OSBigInt *pSrc, OSBigInt *pDst)
	This function is used to copy one BigInt to another.
EXTERNRT int	rtxBigIntToString (OSCTXT *pctxt, const OSBigInt *pInt, int radix, char *str, OSSIZE strSize)
	This function is used to convert a binary big integer value to a string.
EXTERNRT int	rtxBigIntPrint (const OSUTF8CHAR *name, const OSBigInt *bigint, int radix)
	This function is used to print a big integer value to standard output.
EXTERNRT int	rtxBigIntCompare (const OSBigInt *arg1, const OSBigInt *arg2)
	This function is used to compare two big integer values.
EXTERNRT int	rtxBigIntStrCompare (OSCTXT *pctxt, const char *arg1, const char *arg2)
	This function is used to compare two big integer numeric strings.
EXTERNRT void	rtxBigIntFree (OSCTXT *pctxt, OSBigInt *pInt)
	This function frees internal memory within the big integer structure.
EXTERNRT int	rtxBigIntAdd (OSCTXT *pctxt, OSBigInt *result, const OSBigInt *arg1, const OSBigInt *arg2)
	This function is used to add two big integer values.
EXTERNRT int	rtxBigIntSubtract (OSCTXT *pctxt, OSBigInt *result, const OSBigInt *arg1, const OSBigInt *arg2)
	This function is used to subtract one big integer value from another.
EXTERNRT int	rtxBigIntMultiply (OSCTXT *pctxt, OSBigInt *result, const OSBigInt *arg1, const OSBigInt *arg2)
	This function is used to multiply two big integer values.

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Detailed Description

Definition in file rtxBigInt.h.

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Function Documentation

EXTERNRT int rtxBigIntAdd	(	OSCTXT *	pctxt,
		OSBigInt *	result,
		const OSBigInt *	arg1,
		const OSBigInt *	arg2
	)

This function is used to add two big integer values.

Parameters:

	pctxt	Pointer to a context structure.
	result	Pointer to big integer structure to receive result.
	arg1	First big integer to add.
	arg2	Second big integer to add.

Returns:

Result of operation: 0 = success, negative error code if error.

EXTERNRT int rtxBigIntCompare	(	const OSBigInt *	arg1,
		const OSBigInt *	arg2
	)

This function is used to compare two big integer values.

Parameters:

	arg1	First big integer to compare.
	arg2	Second big integer to compare.

Returns:

Result of comparison: -1 = arg1 < arg2, 0 = arg1 == arg2, +1 = arg1 > arg2

EXTERNRT int rtxBigIntCopy	(	OSCTXT *	pctxt,
		const OSBigInt *	pSrc,
		OSBigInt *	pDst
	)

This function is used to copy a big integer data value from one structure to another.

Parameters:

	pctxt	Pointer to a context structure.
	pSrc	Pointer to source big integer structure.
	pDst	Pointer to destination big integer structure.

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT OSSIZE rtxBigIntDigitsNum	(	const OSBigInt *	pInt,
		int	radix
	)

This function is used to get the number of digits in the binary big integer data value based on radix.

Parameters:

	pInt	Pointer to big integer structure.
	radix	Radix of the string value, Valid values are 2, 8, 10, or 16.

Returns:

Number of digits in the binary data value.

EXTERNRT int rtxBigIntFastCopy	(	OSCTXT *	pctxt,
		const OSBigInt *	pSrc,
		OSBigInt *	pDst
	)

This function is used to copy one BigInt to another.

This function will not allocate memory for the byte buffer if the destination BigInt already has a large enough allocated array to hold the data. The destination BigInt must have been initialized using the rtxBigIntInit function.

Parameters:

	pctxt	Pointer to a context structure.
	pSrc	Pointer to source big integer structure.
	pDst	Pointer to destination big integer structure.

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT void rtxBigIntFree	(	OSCTXT *	pctxt,
		OSBigInt *	pInt
	)

This function frees internal memory within the big integer structure.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure in which memory is to be freed.

EXTERNRT int rtxBigIntGetData	(	OSCTXT *	pctxt,
		const OSBigInt *	pInt,
		OSOCTET *	buffer,
		OSSIZE	bufSize
	)

This function is used to get the binary big integer data value in a byte array.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure.
	buffer	Buffer into which binary big integer value is to be copied.
	bufSize	Size of the data buffer.

Returns:

If success, number of bytes in byte array; if error, negative error code.

EXTERNRT OSSIZE rtxBigIntGetDataLen

(

const OSBigInt *

pInt

)

This function is used to get the size in bytes of the binary big integer data value.

Parameters:

pInt

Pointer to big integer structure.

Returns:

Length in bytes of the binary data value.

EXTERNRT void rtxBigIntInit

(

OSBigInt *

pInt

)

This function initializes a big integer structure.

It must be called prior to working with the structure.

Parameters:

pInt

Pointer to big integer data structure.

EXTERNRT int rtxBigIntMultiply	(	OSCTXT *	pctxt,
		OSBigInt *	result,
		const OSBigInt *	arg1,
		const OSBigInt *	arg2
	)

This function is used to multiply two big integer values.

Parameters:

	pctxt	Pointer to a context structure.
	result	Pointer to big integer structure to receive result.
	arg1	First big integer to be multiplied.
	arg2	Second big integer to be multiplied.

Returns:

Result of operation: 0 = success, negative error code if error.

EXTERNRT int rtxBigIntPrint	(	const OSUTF8CHAR *	name,
		const OSBigInt *	bigint,
		int	radix
	)

This function is used to print a big integer value to standard output.

Parameters:

	name	Name to print in "name=value" format.
	bigint	Pointer to big integer value to be printed.
	radix	Radix of the string value, Valid values are 2, 8, 10, or 16.

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT int rtxBigIntSetBytes	(	OSCTXT *	pctxt,
		OSBigInt *	pInt,
		OSOCTET *	value,
		OSSIZE	vallen
	)

This function sets a big integer binary value from a byte array.

The array is assumed to hold the value in binary form.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure to receive converted value.
	value	Buffer containing binary integer value.
	vallen	Number of byte in the value buffer.

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT int rtxBigIntSetInt64	(	OSCTXT *	pctxt,
		OSBigInt *	pInt,
		OSINT64	value
	)

This function sets a big integer binary value from a signed 64-bit integer value.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure to receive converted value.
	value	64-bit integer value to convert.

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT int rtxBigIntSetStr	(	OSCTXT *	pctxt,
		OSBigInt *	pInt,
		const char *	value,
		int	radix
	)

This function sets a big integer binary value from a null-terminated string.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure to receive converted value.
	value	Numeric string to convert.
	radix	Radix of the string value, Valid values are 0, 2, 8, 10, or 16. Zero must be used if string contains a prefix that identifies the radix (for example, 0x).

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT int rtxBigIntSetStrn	(	OSCTXT *	pctxt,
		OSBigInt *	pInt,
		const char *	value,
		OSSIZE	len,
		int	radix
	)

This function sets a big integer binary value from a character string using the given number of characters.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure to receive converted value.
	value	Numeric string to convert.
	len	Number of bytes from character string to use.
	radix	Radix of the string value, Valid values are 0, 2, 8, 10, or 16. Zero must be used if string contains a prefix that identifies the radix (for example, 0x).

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT int rtxBigIntSetUInt64	(	OSCTXT *	pctxt,
		OSBigInt *	pInt,
		OSUINT64	value
	)

This function sets a big integer binary value from an unsigned 64-bit integer value.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure to receive converted value.
	value	64-bit integer value to convert.

Returns:

Status of the operation, 0 = success, negative code if error.

EXTERNRT int rtxBigIntStrCompare	(	OSCTXT *	pctxt,
		const char *	arg1,
		const char *	arg2
	)

This function is used to compare two big integer numeric strings.

Parameters:

	pctxt	Pointer to a context structure.
	arg1	First big integer string to compare.
	arg2	Second big integer string to compare.

Returns:

Result of comparison: -1 = arg1 < arg2, 0 = arg1 == arg2, +1 = arg1 > arg2

EXTERNRT int rtxBigIntSubtract	(	OSCTXT *	pctxt,
		OSBigInt *	result,
		const OSBigInt *	arg1,
		const OSBigInt *	arg2
	)

This function is used to subtract one big integer value from another.

Parameters:

	pctxt	Pointer to a context structure.
	result	Pointer to big integer structure to receive result.
	arg1	Big integer value that arg2 is subtracted from (minuend).
	arg2	Big integer to be subtracted from arg1 (subtrahend).

Returns:

Result of operation: 0 = success, negative error code if error.

EXTERNRT int rtxBigIntToString	(	OSCTXT *	pctxt,
		const OSBigInt *	pInt,
		int	radix,
		char *	str,
		OSSIZE	strSize
	)

This function is used to convert a binary big integer value to a string.

Parameters:

	pctxt	Pointer to a context structure.
	pInt	Pointer to big integer structure to convert.
	radix	Radix of the string value, Valid values are 2, 8, 10, or 16.
	str	Character string buffer to receive converted value.
	strSize	Size, in bytes, of the character string buffer.

Returns:

Status of the operation, 0 = success, negative code if error.