ngcbMath.c File Reference

#include <ngc/core/ngcb.h>

Macros
#define	_GNU_SOURCE
#define	_REENTRANT
#define	PIX_SWAP(a, b)

Functions
int	ngcbEndian (void)
void	ngcbSwap2 (void *buffer, size_t length)
void	ngcbSwap4 (void *buffer, size_t length)
void	ngcbSwap8 (void *buffer, size_t length)
int	ngcbBin2Int (const char *str)
unsigned int	ngcbBin2UInt (const char *str)
void	ngcbInt2Bin (char *str, int in)
void	ngcbUInt2Bin (char *str, unsigned int in)
int	ngcbRound (double x)
int	ngcbRoundL (long double x)
int64_t	ngcbRound64 (double x)
int64_t	ngcbRound64L (long double x)
double	ngcbMean16 (unsigned short *a, int n)
double	ngcbMean32 (int *a, int n)
double	ngcbMeanR32 (float *a, int n)
double	ngcbMeanR64 (double *a, int n)
unsigned short	ngcbMedian16 (unsigned short *a, int n)
int	ngcbMedian32 (int *a, int n)
float	ngcbMedianR32 (float *a, int n)
void	ngcbFilterInit (ngcb_ma_t *f, int size)
void	ngcbFilterDelete (ngcb_ma_t *f)
void	ngcbFilterReset (ngcb_ma_t *f)
double	ngcbFilter (ngcb_ma_t *f, double value)
void	ngcbMedianInit (ngcb_rm_t *f, int size)
void	ngcbMedianDelete (ngcb_rm_t *f)
void	ngcbMedianReset (ngcb_rm_t *f)
int	ngcbRunningMedian (ngcb_rm_t *f, int value)

Detailed Description

Copyright

SPDX-FileCopyrightText: 2026 European Southern Observatory (ESO) SPDX-License-Identifier: LGPL-3.0-only

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE

_REENTRANT

#define _REENTRANT

PIX_SWAP

#define PIX_SWAP	(		a,
			b )

Value:

{tmp=(a);(a)=(b);(b)=tmp;}

Function Documentation

ngcbBin2Int()

int ngcbBin2Int

(

const char *

str

)

Convert binary format string to signed integer. The string to be passed can contain up to 32 characters '0' or '1'.

ngcbBin2UInt()

unsigned int ngcbBin2UInt

(

const char *

str

)

Convert binary format string to an unsigned integer. The string to be passed can contain up to 32 characters '0' or '1'.

ngcbEndian()

int ngcbEndian

(

void

)

Return ngcbBIG_ENDIAN (1) in case the memory architecture is big endian, otherwise ngcbLITTLE_ENDIAN (0) is returned.

ngcbFilter()

double ngcbFilter	(	ngcb_ma_t *	f,
		double	value )

Return next filtered value (moving average).

ngcbFilterDelete()

void ngcbFilterDelete

(

ngcb_ma_t *

f

)

Delete moving average filter.

ngcbFilterInit()

void ngcbFilterInit	(	ngcb_ma_t *	f,
		int	size )

Initialize moving average filter.

ngcbFilterReset()

void ngcbFilterReset

(

ngcb_ma_t *

f

)

Reset moving average filter.

ngcbInt2Bin()

void ngcbInt2Bin	(	char *	str,
		int	in )

Convert a signed integer value to binary format string.

ngcbMean16()

double ngcbMean16	(	unsigned short *	a,
		int	n )

Compute mean-value of 16-bit unsigned integer array.

ngcbMean32()

double ngcbMean32	(	int *	a,
		int	n )

Compute mean-value of 32-bit signed integer array.

ngcbMeanR32()

double ngcbMeanR32	(	float *	a,
		int	n )

Compute mean-value of 32-bit floating point array.

ngcbMeanR64()

double ngcbMeanR64	(	double *	a,
		int	n )

Compute mean-value of 64-bit floating point array.

ngcbMedian16()

unsigned short ngcbMedian16	(	unsigned short *	a,
		int	n )

Compute median of 16-bit unsigned integer array.

ngcbMedian32()

int ngcbMedian32	(	int *	a,
		int	n )

Compute median of 32-bit signed integer array.

ngcbMedianDelete()

void ngcbMedianDelete

(

ngcb_rm_t *

f

)

Delete running median filter.

ngcbMedianInit()

void ngcbMedianInit	(	ngcb_rm_t *	f,
		int	size )

Initialize running median filter.

ngcbMedianR32()

float ngcbMedianR32	(	float *	a,
		int	n )

Compute median of 32-bit floating point array.

ngcbMedianReset()

void ngcbMedianReset

(

ngcb_rm_t *

f

)

Reset running median filter.

ngcbRound()

int ngcbRound

(

double

x

)

Round argument to the nearest 32-bit integral value.

ngcbRound64()

int64_t ngcbRound64

(

double

x

)

Round argument to the nearest 64-bit integral value

ngcbRound64L()

int64_t ngcbRound64L

(

long double

x

)

Round argument to the nearest 64-bit integral value

ngcbRoundL()

int ngcbRoundL

(

long double

x

)

Round argument to the nearest 32-bit integral value.

ngcbRunningMedian()

int ngcbRunningMedian	(	ngcb_rm_t *	f,
		int	value )

Return next filtered value (running median).

ngcbSwap2()

void ngcbSwap2	(	void *	buffer,
		size_t	length )

Change the byte order of the 16-bit numbers in buffer from 1,2 to 2,1. length is the number of 16-bit items in the buffer.

ngcbSwap4()

void ngcbSwap4	(	void *	buffer,
		size_t	length )

Change the byte order of the 32-bit numbers in buffer from 1,2,3,4 to 4,3,2,1. length is the number of 32-bit items (integer, single precision float) in the buffer.

ngcbSwap8()

void ngcbSwap8	(	void *	buffer,
		size_t	length )

Change the byte order of the 64-bit numbers in buffer from 1,2,3,4,5,6,7,8 to 8,7,6,5,4,3,2,1. length is the number of 64-bit items (64-bit integer, double precision float) in the buffer.

ngcbUInt2Bin()

void ngcbUInt2Bin	(	char *	str,
		unsigned int	in )

Convert an unsigned integer value to binary format string.