Class for handling FITS Image extensions. More...

#include <FITSImgParser.h>

Public Member Functions
	FITSImgParser (const String &name)
	Construct a parser from the FITS file.
	FITSImgParser (const FITSImgParser &other)
	Copy constructor (reference semantics).
	~FITSImgParser ()
	Destructor, does not much.
FITSImgParser &	operator= (const FITSImgParser &other)
	Assignment (reference semantics).
String	fitsname (Bool stripPath=False) const
	Returns the name of the disk file.
Int	get_index (const FITSExtInfo &extinfo)
	Identify the index of an extension.
Int	find_extension (const String &extname, const Int &extversion=-1)
	Find an extension; return -1 if not found.
uInt	get_firstdata_index (void)
	Get the index of the first extension with data.
uInt	get_numhdu (void)
	Get the number of extensions.
String	get_extlist_string (const String &delimiter, const String &qualmarker="", const String &fitsmarker="", const Bool &listall=True)
	Get a string representation of the extension list.
Bool	has_qualityimg (void)
	Get the flag indicating at least one quality image.
Bool	is_qualityimg (const String &extexpr)
	Check whether the extensions named in the extension expression can be loaded as a quality image.
Bool	get_quality_data (const String &extexpr, Int &data_HDU, Int &error_HDU, String &error_type, Int &mask_HDU, String &mask_type, Int &mask_value)
	Find all necessary access information for the extensions to be loaded as a quality image.
Private Member Functions
void	setup (void)
	Setup the object (used by constructors).
void	process_extension (HeaderDataUnit *h, const uInt &extindex)
	Get the information on an extension.
Bool	get_extlist (const String &extexpr, Vector< String > &extlist)
	Extract the list of extensions from the extension expression.
Int	get_dataindex (const Vector< Int > &extindex)
	Get the first extension with HDU type "data" from the list of indices.
String	get_errorext (const Int &ext_index)
	Get the error extension name for the given data extension.
String	get_maskext (const Int &ext_index)
	Get the mask extension name for the given data extension.
Bool	confirm_fix_keywords (const Int &ext_index)
	Check the keywords with fixed values.
Bool	index_is_HDUtype (const Int &ext_index, const String &hdutype)
	Check whether the extension has a certain HDU type.
Bool	find_qualimgs (void)
	Find and store all set of extensions that can be loaded as a quality image.
Private Attributes
String	name_p
uInt	numhdu_p
FITSExtInfo *	extensions_p
Vector< String >	qualimglist_p
Bool	hasmeasurement_p
Static Private Attributes
static const char *	storeKwords_p []
static const int	nKwords_p

Detailed Description

Class for handling FITS Image extensions.

Intended use:

Public interface

Review Status

Test programs:: tFITSImgParser

Prerequisite

Etymology

This class parses through a FITS image and stores essential information for each extension.

Synopsis

The class parses through a FITS image and extracts information on its extensions, e.g. the extension name and the extension version. It is possible to identify a certain extension and to get the its extension index.

It is also explored whether some of the FITS extensions can be loaded as a quality image (data + error + mask).

Example

       FITSImgParser fitsImg("in.fits");
       uInt numHDU    = fitsImg.get_numhdu();                // get the total number of HDU's
       uInt firstdata = fitsImg.get_firstdata_index();       // get the first HDU with data
       String allExts = fitsImg.get_extlist_string(String("\n"));  // get a string representation of all extensions
       String hasQual = fitsImg.has_qualityimg();            // check whether some of the extensions form quality image

Motivation

Investigate and select FITS extensions

Definition at line 87 of file FITSImgParser.h.

Constructor & Destructor Documentation

casa::FITSImgParser::FITSImgParser ( const String & name )

Construct a parser from the FITS file.

casa::FITSImgParser::FITSImgParser ( const FITSImgParser & other )

Copy constructor (reference semantics).

casa::FITSImgParser::~FITSImgParser ( )

Destructor, does not much.

Member Function Documentation

Bool casa::FITSImgParser::confirm_fix_keywords ( const Int & ext_index ) [private]

Check the keywords with fixed values.

Int casa::FITSImgParser::find_extension	(	const String &	extname,
		const Int &	extversion = `-1`
	)

Find an extension; return -1 if not found.

Bool casa::FITSImgParser::find_qualimgs ( void ) [private]

Find and store all set of extensions that can be loaded as a quality image.

String casa::FITSImgParser::fitsname ( Bool stripPath = False ) const

Returns the name of the disk file.

Int casa::FITSImgParser::get_dataindex ( const Vector< Int > & extindex ) [private]

Get the first extension with HDU type "data" from the list of indices.

Returns "-1" if there is none.

String casa::FITSImgParser::get_errorext ( const Int & ext_index ) [private]

Get the error extension name for the given data extension.

Bool casa::FITSImgParser::get_extlist	(	const String &	extexpr,
		Vector< String > &	extlist
	)		`[private]`

Extract the list of extensions from the extension expression.

String casa::FITSImgParser::get_extlist_string	(	const String &	delimiter,
		const String &	qualmarker = `""`,
		const String &	fitsmarker = `""`,
		const Bool &	listall = `True`
	)

Get a string representation of the extension list.

uInt casa::FITSImgParser::get_firstdata_index ( void )

Get the index of the first extension with data.

Int casa::FITSImgParser::get_index ( const FITSExtInfo & extinfo )

Identify the index of an extension.

String casa::FITSImgParser::get_maskext ( const Int & ext_index ) [private]

Get the mask extension name for the given data extension.

uInt casa::FITSImgParser::get_numhdu ( void ) [inline]

Get the number of extensions.

Definition at line 115 of file FITSImgParser.h.

References numhdu_p.

Bool casa::FITSImgParser::get_quality_data	(	const String &	extexpr,
		Int &	data_HDU,
		Int &	error_HDU,
		String &	error_type,
		Int &	mask_HDU,
		String &	mask_type,
		Int &	mask_value
	)