mrftools Namespace Reference

Helper functions for single bit manipulations. More...

Functions
bool	getIntBit (const UInt_t &position, const UInt_t &value)
	Retrieves a single bit from an integer value. More...
void	setIntBit (const UInt_t &position, UInt_t &value, const bool &state)
	Sets a single bit in an integer value. More...
UInt_t	shiftBy (const int &positions, const UInt_t &value)
	Shifts the bits in an integer value. More...
unsigned int	getIteratorItemCount (const std::map< std::string, TConfItem >::const_iterator &start, const std::map< std::string, TConfItem >::const_iterator &stop)
unsigned int	getIteratorItemCount (const std::map< std::string, std::map< std::string, TConfItem > >::const_iterator &start, const std::map< std::string, std::map< std::string, TConfItem > >::const_iterator &stop)
UInt_t	grayToBin (UInt_t gray)
	Converts gray encoded values to bianry values. More...

Variables
static const UInt_t	UInt_t_bitlength = sizeof(UInt_t) * CHAR_BIT
static const UInt_t	UInt_t_bitlength = sizeof(UInt_t) * CHAR_BIT

Detailed Description

Helper functions for single bit manipulations.

Function Documentation

bool mrftools::getIntBit	(	const UInt_t &	position,
		const UInt_t &	value
	)

Retrieves a single bit from an integer value.

Parameters

position	Position of bit to investigate.
value	Value whose bits are to be investigated.

Returns

True if the bit is set, False if the bit is not set.

Definition at line 15 of file MvdOfflineTBAnalysis_Topix4/mrftools.cxx.

References UInt_t_bitlength.

Referenced by TMrfData_8b::resample().

{
        if (position < UInt_t_bitlength) {
                return (value & (1 << position));
        }
        else {
                return false;
        }
}

unsigned int mrftools::getIteratorItemCount	(	const std::map< std::string, TConfItem >::const_iterator &	start,
		const std::map< std::string, TConfItem >::const_iterator &	stop
	)

Definition at line 50 of file MvdOfflineTBAnalysis_Topix4/mrftools.cxx.

References count.

{
        std::map<std::string, TConfItem>::const_iterator iter;
        unsigned int count = 0;
        for (iter = start; iter != stop; ++iter) {
                ++count;
        }
        return count;
}

unsigned int mrftools::getIteratorItemCount	(	const std::map< std::string, std::map< std::string, TConfItem > >::const_iterator &	start,
		const std::map< std::string, std::map< std::string, TConfItem > >::const_iterator &	stop
	)

Definition at line 60 of file MvdOfflineTBAnalysis_Topix4/mrftools.cxx.

References count.

{
        unsigned int count = 0;
        std::map<std::string, std::map<std::string, TConfItem> >::const_iterator iter;
        std::map<std::string,TConfItem>::const_iterator iter2;
        for (iter=start; iter!=stop; ++iter) {
        for (iter2 = iter->second.begin(); iter2 != iter->second.end(); ++iter2) {
                    ++count;
            }
        }
        return count;
}

UInt_t mrftools::grayToBin

(

UInt_t

gray

)

Converts gray encoded values to bianry values.

Parameters

gray	Gray encoded value.

Returns

The correponding binary value.

Definition at line 73 of file MvdOfflineTBAnalysis_Topix4/mrftools.cxx.

Referenced by PndMvdPasta::AnalyzeThresholdWordFull(), PndTopix4::BitAnalyzePixelData(), and PndMvdReadInTBData::BitAnalyzePixelData().

{
        //UInt_t result = 0;
        //setIntBit(31, result, getIntBit(31, gray));
        //for (unsigned int i = 30; i > 0; --i) {
        //        setIntBit(i, result, (getIntBit(i+1, result) && !(getIntBit(i, gray))) || (!(getIntBit(i+1, result)) && getIntBit(i, gray)));
        //}
        //setIntBit(0, result, (getIntBit(1, result) && !(getIntBit(0, gray))) || (!(getIntBit(1, result)) && getIntBit(0, gray)));

    //return result;

        for (UInt_t bit = 1U << 31; bit > 1; bit >>= 1)
        {
                if (gray & bit) gray ^= bit >> 1;
        }
        return gray;
}

void mrftools::setIntBit	(	const UInt_t &	position,
		UInt_t &	value,
		const bool &	state
	)

Sets a single bit in an integer value.

Parameters

position	The positional index of the bit to be manipulated, 0 referring to the least significant bit.
value	The integer value whose bits are to be manipulated.
state	True sets the bit, False resets the bit.

Definition at line 25 of file MvdOfflineTBAnalysis_Topix4/mrftools.cxx.

References UInt_t_bitlength.

Referenced by TMrfData_8b::getBitBlock(), and TMrfData_8b::setBit().

{
        if (position < UInt_t_bitlength) {
                if (state) {
                        value |= (1 << position);
                }
                else {
                        value &= (~(1 << position));
                }
        }
}

UInt_t mrftools::shiftBy	(	const int &	positions,
		const UInt_t &	value
	)

Shifts the bits in an integer value.

Parameters

positions	Number of positions to be shifted. A positive value means shift to the MSB (left), negative means shift to the LSB (right).
value	The integer value whose bits are to be shifted.

Returns

The original value shifted by the given number of positions.

Definition at line 37 of file MvdOfflineTBAnalysis_Topix4/mrftools.cxx.

{
        if (positions < 0) {
                return (value >> (-positions));
        }
        else if (positions > 0) {
                return (value << positions);
        }
        else {
                return value;
        }
}

Variable Documentation

const UInt_t mrftools::UInt_t_bitlength = sizeof(UInt_t) * CHAR_BIT

static

Definition at line 13 of file MvdOfflineTBAnalysis_Topix4/mrftools.cxx.

Referenced by getIntBit(), and setIntBit().

const UInt_t mrftools::UInt_t_bitlength = sizeof(UInt_t) * CHAR_BIT

static

Definition at line 13 of file MvdTestBeam/Tools/mrftools.cxx.