Detailed Description

Contains various functions for bit analysis.

#include <GBits.h>

Static Public Member Functions
static unsigned int	binaryToGrayCode (unsigned int nBinary)
	Convert a number to its Gray code encoding. More...

static unsigned int	boundingPowerOfTwo (unsigned int n)
	Returns the smallest power of 2 that is greater than or equal to n. More...

static size_t	boundingShift (size_t n)
	Returns the fewest number of times that 1 must be shifted left to make a value greater than or equal to n. More...

static void	bufferToHex (const unsigned char pBuffer, size_t nBufferSize, char pHexTwiceAsLarge)
	pHex should point to a buffer that is at 2 * nBufferSize + 1 More...

static void	bufferToHexBigEndian (const unsigned char pBuffer, size_t nBufferSize, char pHexTwiceAsLarge)
	pHex should point to a buffer that is at 2 * nBufferSize + 1 More...

static void	byteToHex (unsigned char byte, char *pHex)
	Converts a byte to two hex digits. The least significate digit will come first. the most significant digit comes next. More...

static void	byteToHexBigEndian (unsigned char byte, char *pHex)
	Converts a byte to two hex digits. The least significate digit will come first. the most significant digit comes next. More...

static int	compareDoubles (double a, double b)
	Returns -1 if a < b, 0 if a = b, and 1 if a > b. More...

static int	compareInts (int a, int b)
	Returns -1 if a < b, 0 if a = b, and 1 if a > b. More...

static unsigned int	countOnes (unsigned int n)
	Returns the number of 1's in the binary representation of n. More...

static size_t	countTrailingZeros (size_t n)
	Returns the number of trailing zeros in the binary representation of n. For example, if n=712 (binary 1011001000), it will return 3. If n=0, it will return (size_t)-1 to represent inf. More...

static unsigned int	grayCodeToBinary (unsigned int nGrayCode)
	Convert a number in Gray code encoding to a value. More...

static void	hexToBuffer (const char pHex, size_t nHexSize, unsigned char pBuffer)
	pBuffer should be half the size of nHexSize More...

static void	hexToBufferBigEndian (const char pHex, size_t nHexSize, unsigned char pBuffer)
	pBuffer should be half the size of nHexSize More...

static unsigned char	hexToByte (char lsn, char msn)
	Converts two hexadecimal digits to a byte. lsn is least significant nybble. msn is most significant nybble. More...

static bool	isPowerOfTwo (unsigned int n)
	Returns true if a number is a power of two. More...

static bool	isValidFloat (const char *pString, size_t len)
	returns true iff the specified string is a valid floating point number. For example, it would return true for this string "-1.2e-14", but would return false for these: "e2", "2e", "-.", "2..3", "3-2", "2e3.5", "--1", etc. More...

static unsigned short	littleEndianToN16 (unsigned short in)
	Convert little endian to a 16-bit native integer. More...

static short	littleEndianToN16 (short in)
	Convert little endian to a 16-bit native integer. More...

static unsigned int	littleEndianToN32 (unsigned int in)
	Convert little endian to a 32-bit native integer. More...

static int	littleEndianToN32 (int in)
	Convert little endian to a 32-bit native integer. More...

static unsigned long long	littleEndianToN64 (unsigned long long in)
	Convert little endian to a 64-bit native integer. More...

static long long	littleEndianToN64 (long long in)
	Convert little endian to a 64-bit native integer. More...

static float	littleEndianToR32 (float in)
	Convert little endian to a 32-bit native float. More...

static double	littleEndianToR64 (double in)
	Convert little endian to a 64-bit native float. More...

static unsigned short	n16ToLittleEndian (unsigned short in)
	Convert a 16-bit native integer to little endian. More...

static short	n16ToLittleEndian (short in)
	Convert a 16-bit native integer to little endian. More...

static unsigned int	n32ToLittleEndian (unsigned int in)
	Convert a 32-bit native integer to little endian. More...

static int	n32ToLittleEndian (int in)
	Convert a 32-bit native integer to little endian. More...

static unsigned long long	n64ToLittleEndian (unsigned long long in)
	Convert a 64-bit native integer to little endian. More...

static long long	n64ToLittleEndian (long long in)
	Convert a 64-bit native integer to little endian. More...

static float	r32ToLittleEndian (float in)
	Convert a 32-bit native float to little endian. More...

static double	r64ToLittleEndian (double in)
	Convert a 64-bit native float to little endian. More...

static unsigned short	reverseEndian (unsigned short in)
	Switch the endian of an unsigned integer. More...

static short	reverseEndian (short in)
	Switch the endian of an unsigned integer. More...

static unsigned int	reverseEndian (unsigned int in)
	Switch the endian of an unsigned integer. More...

static int	reverseEndian (int in)
	Switch the endian of an integer. More...

static unsigned long long	reverseEndian (unsigned long long in)
	Switch the endian of a double. More...

static long long	reverseEndian (long long in)
	Switch the endian of a double. More...

static float	reverseEndian (float in)
	Switch the endian of a float. More...

static double	reverseEndian (double in)
	Switch the endian of a double. More...

static int	sign (int n)
	Returns the sign (-1, 0, +1) of an integer. More...

static int	sign (double d)
	Returns the sign of d. More...

static void	test ()

Member Function Documentation

static unsigned int GClasses::GBits::binaryToGrayCode ( unsigned int nBinary )

inlinestatic

Convert a number to its Gray code encoding.

static unsigned int GClasses::GBits::boundingPowerOfTwo ( unsigned int n )

inlinestatic

Returns the smallest power of 2 that is greater than or equal to n.

static size_t GClasses::GBits::boundingShift ( size_t n )

inlinestatic

Returns the fewest number of times that 1 must be shifted left to make a value greater than or equal to n.

static void GClasses::GBits::bufferToHex	(	const unsigned char *	pBuffer,
		size_t	nBufferSize,
		char *	pHexTwiceAsLarge
	)

inlinestatic

pHex should point to a buffer that is at 2 * nBufferSize + 1

static void GClasses::GBits::bufferToHexBigEndian	(	const unsigned char *	pBuffer,
		size_t	nBufferSize,
		char *	pHexTwiceAsLarge
	)

inlinestatic

pHex should point to a buffer that is at 2 * nBufferSize + 1

static void GClasses::GBits::byteToHex	(	unsigned char	byte,
		char *	pHex
	)

inlinestatic

Converts a byte to two hex digits. The least significate digit will come first. the most significant digit comes next.

static void GClasses::GBits::byteToHexBigEndian	(	unsigned char	byte,
		char *	pHex
	)

inlinestatic

Converts a byte to two hex digits. The least significate digit will come first. the most significant digit comes next.

static int GClasses::GBits::compareDoubles	(	double	a,
		double	b
	)

inlinestatic

Returns -1 if a < b, 0 if a = b, and 1 if a > b.

static int GClasses::GBits::compareInts	(	int	a,
		int	b
	)

inlinestatic

Returns -1 if a < b, 0 if a = b, and 1 if a > b.

static unsigned int GClasses::GBits::countOnes ( unsigned int n )

inlinestatic

Returns the number of 1's in the binary representation of n.

static size_t GClasses::GBits::countTrailingZeros ( size_t n )

inlinestatic

Returns the number of trailing zeros in the binary representation of n. For example, if n=712 (binary 1011001000), it will return 3. If n=0, it will return (size_t)-1 to represent inf.

static unsigned int GClasses::GBits::grayCodeToBinary ( unsigned int nGrayCode )

inlinestatic

Convert a number in Gray code encoding to a value.

static void GClasses::GBits::hexToBuffer	(	const char *	pHex,
		size_t	nHexSize,
		unsigned char *	pBuffer
	)

inlinestatic

pBuffer should be half the size of nHexSize

static void GClasses::GBits::hexToBufferBigEndian	(	const char *	pHex,
		size_t	nHexSize,
		unsigned char *	pBuffer
	)

inlinestatic

pBuffer should be half the size of nHexSize

static unsigned char GClasses::GBits::hexToByte	(	char	lsn,
		char	msn
	)

inlinestatic

Converts two hexadecimal digits to a byte. lsn is least significant nybble. msn is most significant nybble.

static bool GClasses::GBits::isPowerOfTwo ( unsigned int n )

inlinestatic

Returns true if a number is a power of two.

static bool GClasses::GBits::isValidFloat	(	const char *	pString,
		size_t	len
	)

static

returns true iff the specified string is a valid floating point number. For example, it would return true for this string "-1.2e-14", but would return false for these: "e2", "2e", "-.", "2..3", "3-2", "2e3.5", "--1", etc.

static unsigned short GClasses::GBits::littleEndianToN16 ( unsigned short in )

inlinestatic

Convert little endian to a 16-bit native integer.

static short GClasses::GBits::littleEndianToN16 ( short in )

inlinestatic

Convert little endian to a 16-bit native integer.

static unsigned int GClasses::GBits::littleEndianToN32 ( unsigned int in )

inlinestatic

Convert little endian to a 32-bit native integer.

static int GClasses::GBits::littleEndianToN32 ( int in )

inlinestatic

Convert little endian to a 32-bit native integer.

static unsigned long long GClasses::GBits::littleEndianToN64 ( unsigned long long in )

inlinestatic

Convert little endian to a 64-bit native integer.

static long long GClasses::GBits::littleEndianToN64 ( long long in )

inlinestatic

Convert little endian to a 64-bit native integer.

static float GClasses::GBits::littleEndianToR32 ( float in )

inlinestatic

Convert little endian to a 32-bit native float.

static double GClasses::GBits::littleEndianToR64 ( double in )

inlinestatic

Convert little endian to a 64-bit native float.

static unsigned short GClasses::GBits::n16ToLittleEndian ( unsigned short in )

inlinestatic

Convert a 16-bit native integer to little endian.

static short GClasses::GBits::n16ToLittleEndian ( short in )

inlinestatic

Convert a 16-bit native integer to little endian.

static unsigned int GClasses::GBits::n32ToLittleEndian ( unsigned int in )

inlinestatic

Convert a 32-bit native integer to little endian.

static int GClasses::GBits::n32ToLittleEndian ( int in )

inlinestatic

Convert a 32-bit native integer to little endian.

static unsigned long long GClasses::GBits::n64ToLittleEndian ( unsigned long long in )

inlinestatic

Convert a 64-bit native integer to little endian.

static long long GClasses::GBits::n64ToLittleEndian ( long long in )

inlinestatic

Convert a 64-bit native integer to little endian.

static float GClasses::GBits::r32ToLittleEndian ( float in )

inlinestatic

Convert a 32-bit native float to little endian.

static double GClasses::GBits::r64ToLittleEndian ( double in )

inlinestatic

Convert a 64-bit native float to little endian.

static unsigned short GClasses::GBits::reverseEndian ( unsigned short in )

inlinestatic

Switch the endian of an unsigned integer.

static short GClasses::GBits::reverseEndian ( short in )

inlinestatic

Switch the endian of an unsigned integer.

static unsigned int GClasses::GBits::reverseEndian ( unsigned int in )

inlinestatic

Switch the endian of an unsigned integer.

static int GClasses::GBits::reverseEndian ( int in )

inlinestatic

Switch the endian of an integer.

static unsigned long long GClasses::GBits::reverseEndian ( unsigned long long in )

inlinestatic

Switch the endian of a double.

static long long GClasses::GBits::reverseEndian ( long long in )

inlinestatic

Switch the endian of a double.

static float GClasses::GBits::reverseEndian ( float in )

inlinestatic

Switch the endian of a float.

static double GClasses::GBits::reverseEndian ( double in )

inlinestatic

Switch the endian of a double.

static int GClasses::GBits::sign ( int n )

inlinestatic

Returns the sign (-1, 0, +1) of an integer.

static int GClasses::GBits::sign ( double d )

inlinestatic

Returns the sign of d.

static void GClasses::GBits::test ( )

static

Detailed Description

Static Public Member Functions

Member Function Documentation