Mathematical functions

Functions
int	TeRound (double val)
	Rounds a double to int.
TL_DLL double	TeRoundD (double val, int precision=8)
	Rounds a double value to a given number of decimal digits.
TL_DLL bool	TeCompareDouble (double a, double b, int precision)
	Compares two doubles.
TL_DLL double	TeAdjustToPrecision (double val, int precision, bool reduce=false)
	Adjust a number to a given precision.
int	TeRoundRasterIndex (double val)
	Rounds a double raster element index to an integer.
double	TeCubicRoot (double x)
bool	TeFPEquals (double d1, double d2, double precision)
TL_DLL unsigned long int	TeGetFreePhysicalMemory ()
TL_DLL unsigned long int	TeGetTotalPhysicalMemory ()
TL_DLL unsigned long int	TeGetUsedVirtualMemory ()
TL_DLL unsigned long int	TeGetTotalVirtualMemory ()
TL_DLL unsigned int	TeGetPhysProcNumber ()
TL_DLL bool	TeGetTempFileName (std::string &filename)
TL_DLL unsigned long int	TeGetFileSize (const std::string &filename)
	The file size (bytes).
TL_DLL bool	TeCheckFileExistence (const std::string &filename)
	Check the file existence.
TL_DLL bool	TeGetDirFullFilesNames (const std::string &path, const bool &recursive, std::vector< std::string > &filesnames)
	Get the full names of all files inside the given directory.
TL_DLL bool	TeCopyFile (const std::string &inputFileName, const std::string &outputFileName)
	Creates a copy from the given input file name.
TL_DLL bool	TeCompareFiles (const std::string &inputFileName1, const std::string &inputFileName2)
	Compare two files.
TL_DLL bool	TeReplaceTextFileSubString (const std::string &inputFileName, const std::string &outputFileName, const std::string &oldSubString, const std::string &newSubString)
	Creates a copy from the given input text file name replacing all ocurrences of.
TL_DLL unsigned long int	TeCreateHashFromString (unsigned char const *inputString, const unsigned int &inputStringSize)
	Creates a hash number from an input string.

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Function Documentation

TL_DLL double TeAdjustToPrecision	(	double	val,
		int	precision,
		bool	reduce = false
	)

Adjust a number to a given precision.

TL_DLL bool TeCheckFileExistence

(

const std::string &

filename

)

Check the file existence.

Parameters:

filename

The file name.

Returns:

true if the file exists, false if not.

TL_DLL bool TeCompareDouble	(	double	a,
		double	b,
		int	precision
	)

Compares two doubles.

TL_DLL bool TeCompareFiles	(	const std::string &	inputFileName1,
		const std::string &	inputFileName2
	)

Compare two files.

Parameters:

inputFileName1	The input full file 1 name.
inputFileName2	The input full file 2 name.

Returns:

true if the two files are identical, false if not.

TL_DLL bool TeCopyFile	(	const std::string &	inputFileName,
		const std::string &	outputFileName
	)

Creates a copy from the given input file name.

Parameters:

inputFileName	The input full file name.
outputFileName	The output full file name.

Returns:

true if OK, false if not.

TL_DLL unsigned long int TeCreateHashFromString	(	unsigned char const *	inputString,
		const unsigned int &	inputStringSize
	)

Creates a hash number from an input string.

This algorithm was created for sdbm (a public-domain reimplementation of ndbm) database library. It was found to do well in scrambling bits, causing better distribution of the keys and fewer splits. It also happens to be a good general hashing function with good distribution. the actual function is hash(i) = hash(i - 1) * 65599 + str[i]

Parameters:

inputStringFileName	The input full file name.
inputStringSize	Input string size.

Returns:

The generated hash value.

double TeCubicRoot

(

double

x

)

[inline]

Cubic root from x.

Parameters:

x

X.

Returns:

The cubic root from x.

bool TeFPEquals	(	double	d1,
		double	d2,
		double	precision
	)		[inline]

Comparassion of two floating points, considering a given precision

TL_DLL bool TeGetDirFullFilesNames	(	const std::string &	path,
		const bool &	recursive,
		std::vector< std::string > &	filesnames
	)

Get the full names of all files inside the given directory.

TL_DLL unsigned long int TeGetFileSize

(

const std::string &

filename

)

The file size (bytes).

Note:

Throws an exception if file not found.

Parameters:

filename

The file name.

Returns:

The file size (bytes).

TL_DLL unsigned long int TeGetFreePhysicalMemory

(

)

Returns the amount of free physical memory (bytes).

Returns:

The amount of free physical memory (bytes).

TL_DLL unsigned int TeGetPhysProcNumber

(

)

Returns the number of physical processors.

Returns:

The number of physical processors.

TL_DLL bool TeGetTempFileName

(

std::string &

filename

)

Generates a temporary unique file name.

Parameters:

filename

The generated file name.

Returns:

true if ok, false errors.

TL_DLL unsigned long int TeGetTotalPhysicalMemory

(

)

Returns the amount of total physical memory (bytes).

Returns:

The amount of total physical memory (bytes).

TL_DLL unsigned long int TeGetTotalVirtualMemory

(

)

Returns the amount of total virtual memory (bytes) that can be claimed by the current process (physical + swapped).

Returns:

The amount of total virtual memory (bytes).

TL_DLL unsigned long int TeGetUsedVirtualMemory

(

)

Returns the amount of used virtual memory (bytes) for the current process (physical + swapped).

Returns:

The amount of free virtual memory (bytes).

TL_DLL bool TeReplaceTextFileSubString	(	const std::string &	inputFileName,
		const std::string &	outputFileName,
		const std::string &	oldSubString,
		const std::string &	newSubString
	)

Creates a copy from the given input text file name replacing all ocurrences of.

Parameters:

inputFileName	The input full file name.
inputFileName	The output full file name.
oldSubString	The sub-string to be replaced from the input file.
newSubString	The new sub-string.

Returns:

true if OK, false if not.

int TeRound

(

double

val

)

[inline]

Rounds a double to int.

Examples:

TePDICorrelationMatching_test.cpp, TePDIMIMatching_test.cpp, TePDIMMIOMatching_test.cpp, and TePDIOFMatching_test.cpp.

TL_DLL double TeRoundD	(	double	val,
		int	precision = 8
	)

Rounds a double value to a given number of decimal digits.

int TeRoundRasterIndex

(

double

val

)

[inline]

Rounds a double raster element index to an integer.