Class to read values from the Aipsrc general resource files. More...

#include <Aipsrc.h>

Inheritance diagram for casacore::AipsrcValue< T >:

Public Member Functions
	AipsrcValue ()
	Default constructor Tip: A constructor (and destructor) have been provided to be able to generate a (routine-level) static register list; This had to be done since static data members are not yet implemented in the gcc compiler for templated classes; Once they are available the `tlist` and `ntlst` data can become static, constructor and desctructor and all references to the init() method can disappear; More...

	~AipsrcValue ()
	See note with constructor. More...

template<>
Bool	find (String &value, const String &keyword, const Unit &defun, const Unit &resun)

Static Public Member Functions
static Bool	find (T &value, const String &keyword)
	The `find()` functions will, given a keyword, return the value of a matched keyword found in the files. More...

static Bool	find (T &value, const String &keyword, const T &deflt)

static Bool	find (T &value, const String &keyword, const Unit &defun, const Unit &resun)
	These `find()` functions will, given a keyword, read the value of a matched keyword as a Quantity. More...

static Bool	find (T &value, const String &keyword, const Unit &defun, const Unit &resun, const T &deflt)

static uInt	registerRC (const String &keyword, const T &deflt)
	Functions to register keywords for later use in get() and set(). More...

static uInt	registerRC (const String &keyword, const Unit &defun, const Unit &resun, const T &deflt)

static const T &	get (uInt keyword)
	Gets are like find, but using registered integers rather than names. More...

static void	set (uInt keyword, const T &deflt)
	Sets allow registered values to be set. More...

static void	save (uInt keyword)
	Save registered value to `$HOME/.aipsrc` More...

Static Public Member Functions inherited from casacore::Aipsrc
static Bool	find (String &value, const String &keyword)

static Bool	findNoHome (String &value, const String &keyword)

static Bool	find (uInt &value, const String &keyword, Int Nname, const String tname[])
	These finds check a (possible) value of the keyword against a list of coded values provided, and return an index into the list (N if not found). More...

static Bool	find (uInt &value, const String &keyword, const Vector< String > &tname)

static Bool	find (String &value, const String &keyword, const String &deflt)
	This find usually saves you some lines of code, since you can supply the default you want to use when no such keyword is defined. More...

static Bool	findNoHome (String &value, const String &keyword, const String &deflt)

static Bool	find (uInt &value, const String &keyword, Int Nname, const String tname[], const String &deflt)

static Bool	find (uInt &value, const String &keyword, const Vector< String > &tname, const String &deflt)

static Bool	findDir (String &foundDir, const String &lastPart="", const Vector< String > &prepends=Vector< String >(), const Vector< String > &appends=Vector< String >(), Bool useStds=True)
	Sets foundDir to the first /firstPart/lastPart path that it finds present on the system, where /firstPart comes from, in order, this list: contents of prepends. More...

static uInt	registerRC (const String &keyword, const String &deflt)
	Functions to register keywords for later use in get() and set(). More...

static uInt	registerRC (const String &keyword, Int Nname, const String tname[], const String &deflt)

static uInt	registerRC (const String &keyword, const Vector< String > &tname, const String &deflt)

static const String &	get (uInt keyword)
	Gets are like find, but using registered integers rather than names. More...

static const uInt &	get (uInt &code, uInt keyword)
	get for code More...

static void	set (uInt keyword, const String &deflt)
	Sets allow registered values to be set. More...

static void	set (uInt keyword, Int Nname, const String tname[], const String &deflt)

static void	set (uInt keyword, const Vector< String > &tname, const String &deflt)

static void	save (uInt keyword)
	Save a registered keyword value to `$HOME/.aipsrc` More...

static void	save (uInt keyword, const String tname[])

static void	save (uInt keyword, const Vector< String > &tname)

static void	setAipsPath (const String &path=String())
	Set an AIPSPATH that should be used in stead of a global AIPSPATH. More...

static const String &	aipsRoot ()
	Returns the appropriate Casacore or system variable values. More...

static const String &	aipsArch ()

static const String &	aipsSite ()

static const String &	aipsHost ()

static const String &	aipsHome ()
	Returns: `~/aips++` More...

static void	reRead ()
	The `reRead()` function will reinitialise the static maps and read the aipsrc files again. More...

static Double	lastRead ()

static const Block< String > &	values ()
	The following functions return the full lists of available data. More...

static const Block< String > &	patterns ()

static void	show (ostream &oStream)
	The following `show()` function, useful for debugging, outputs all keyword/value pairs found. More...

static void	show ()
	Prints all info on cout. More...

static uInt	genRestore (Vector< String > &namlst, Vector< String > &vallst, const String &fileList)
	The following set is a general set of functions. More...

static void	genSave (Vector< String > &namlst, Vector< String > &vallst, const String &fnam)
	Save the names/values in file. More...

static void	genSet (Vector< String > &namlst, Vector< String > &vallst, const String &nam, const String &val)
	Set (new or overwrite) keyword/value pair. More...

static Bool	genUnSet (Vector< String > &namlst, Vector< String > &vallst, const String &nam)
	Remove a keyword from list (False if not in list) More...

static Bool	genGet (String &val, Vector< String > &namlst, Vector< String > &vallst, const String &nam)
	Get the value of a keyword. More...

Private Member Functions
AipsrcValue< T > &	operator= (const AipsrcValue< T > &other)
	Copy constructor (not implemented) More...

	AipsrcValue (const AipsrcValue< T > &other)

Private Attributes
Block< T >	tlst
	Register list. More...

Block< String >	ntlst

Static Private Attributes
static AipsrcValue	myp_p
	The global AipsrcValue object. More...

static Mutex	theirMutex

Additional Inherited Members
Static Protected Member Functions inherited from casacore::Aipsrc
static Bool	find (String &value, const String &keyword, uInt start)
	Actual find function. More...

static Bool	findNoParse (String &value, const String &keyword, uInt start)
	Actual find function to use during parse() without recursing into parse() More...

static uInt	registerRC (const String &keyword, Block< String > &nlst)
	The registration function. More...

static void	save (const String keyword, const String val)
	Actual saving. More...

Detailed Description

template<class T>
class casacore::AipsrcValue< T >

Class to read values from the Aipsrc general resource files.

Intended use:

Public interface

Review Status

Reviewed By:: mhaller
Date Reviewed:: 1997/10/08
Test programs:: tAipsrcValue

Prerequisite

Aipsrc

Etymology

A class for getting values from the Aipsrc files

Synopsis

The static AipsrcValue class can get typed values from the Aipsrc resource files.
The basic interaction with the class is with the static keyword match functions:

Bool AipsrcValue<Type>::find(Type &result, const String &keyword)
Bool AipsrcValue<Type>::find(Type &result, const String &keyword,
const Type &deflt)

comparable to the standard (String) Aipsrc find.
If the resource file contains a multi-valued keyword, use the AipsrcVector class instead.

The class is templated. For ease of use typedefs are provided for:

AipsrcDouble, AipsrcInt, AipsrcBool, AipsrcString

AipsrcVDouble, AipsrcVInt, AipsrcVBool, AipsrcVString

In addition to the above finds, special finds:

Bool AipsrcValue<Type>::find(Type &result, const String &keyword,
const Unit &defun, const Unit &resun)
Bool AipsrcValue<Type>::find(Type &result, const String &keyword,
const Unit &defun, const Unit &resun,
const Type &deflt)

are provided. These finds will read the keyword value as a Quantity. If no units are given, the defun are assumed. The result is converted to the resun, before the value is returned. E.g.

Double x;

find(x, "time.offset", "h", "d");

will return:

2.5/24 for a value specified as 2.5 in resource file
2.5/24 for 2:30:00
0.5/24 for 30min
0.5 for 0.5d

The class has registerRC, get, set functions as described in Aipsrc. Note that registration is on a per Type basis, and hence registration of the same keyword in different types (and possible sets) act on different values, but with the same result if no set has been done.

Specialisation exists for Bool, where True is any value string starting with one of 'yYtT123456789', and False in all other cases, and no finds with Units are provided. Strings are supposed to be handled by standard Aipsrc class for single values, and a specialisation exists for the AipsrcVector case.

Example

String tzoff;          // result of keyword find
if (!AipsrcValue<Double>::find(tzoff, "time.zone.offset")) {   // look for key
tzoff = -5;
};

A more convenient way of accomplishing the same result is:

AipsrcDouble::find(tzoff, "time.zone.offset", -5);

or even:

AipsrcDouble::find(tzoff, "time.zone.offset",

"h", "h", -5);

Here the final argument is the default to use if the keyword is not found at all.

Template Type Argument Requirements

All types with a >> defined.
Warning: Since interpretation of the keyword value string is done with the standard input right-shift operator, specialisations are necessary for non-standard cases like Bool; They are provided; String is supposed to be handled by standard Aipsrc;

Motivation

Programs need a way to interact with the AipsrcValue files.

Thrown Exceptions

AipsError if the environment variables HOME and/or AIPSPATH not set.

Definition at line 40 of file Aipsrc.h.

Constructor & Destructor Documentation

template<class T >

casacore::AipsrcValue< T >::AipsrcValue ( )

Default constructor
Tip: A constructor (and destructor) have been provided to be able to generate a (routine-level) static register list; This had to be done since static data members are not yet implemented in the gcc compiler for templated classes; Once they are available the tlist and ntlst data can become static, constructor and desctructor and all references to the init() method can disappear;

template<class T >

casacore::AipsrcValue< T >::~AipsrcValue ( )

See note with constructor.

template<class T >

casacore::AipsrcValue< T >::AipsrcValue ( const AipsrcValue< T > & other )

private

Member Function Documentation

template<class T >

static Bool casacore::AipsrcValue< T >::find	(	T &	value,
		const String &	keyword
	)

static

The find() functions will, given a keyword, return the value of a matched keyword found in the files.

If no match found the function will be False, and the default returned if specified.

template<class T >

static Bool casacore::AipsrcValue< T >::find	(	T &	value,
		const String &	keyword,
		const T &	deflt
	)

static

template<class T >

static Bool casacore::AipsrcValue< T >::find	(	T &	value,
		const String &	keyword,
		const Unit &	defun,
		const Unit &	resun
	)

static

These find() functions will, given a keyword, read the value of a matched keyword as a Quantity.

If no unit has been given in the keyword value, the defun Unit will be assumed. The value returned will be converted to the resun Unit. If no match found, the default value is returned (see example above).

template<class T >

static Bool casacore::AipsrcValue< T >::find	(	T &	value,
		const String &	keyword,
		const Unit &	defun,
		const Unit &	resun,
		const T &	deflt
	)

static

template<>

Bool casacore::AipsrcValue< String >::find	(	String &	value,
		const String &	keyword,
		const Unit &	defun,
		const Unit &	resun
	)

template<class T >

static const T& casacore::AipsrcValue< T >::get ( uInt keyword )

static

Gets are like find, but using registered integers rather than names.

The aipsrc file is read only once, and values can be set as well.

Referenced by casacore::AppInfo::timeZone().

template<class T >

AipsrcValue<T>& casacore::AipsrcValue< T >::operator= ( const AipsrcValue< T > & other )

private

Copy constructor (not implemented)

template<class T >

static uInt casacore::AipsrcValue< T >::registerRC	(	const String &	keyword,
		const T &	deflt
	)

static

Functions to register keywords for later use in get() and set().

The returned value is the index for get() and set().

template<class T >

static uInt casacore::AipsrcValue< T >::registerRC	(	const String &	keyword,
		const Unit &	defun,
		const Unit &	resun,
		const T &	deflt
	)

static

template<class T >

static void casacore::AipsrcValue< T >::save ( uInt keyword )

static

Save registered value to $HOME/.aipsrc

template<class T >

static void casacore::AipsrcValue< T >::set	(	uInt	keyword,
		const T &	deflt
	)

static

Sets allow registered values to be set.

Member Data Documentation

template<class T >

AipsrcValue casacore::AipsrcValue< T >::myp_p

staticprivate

The global AipsrcValue object.

Definition at line 222 of file AipsrcValue.h.

template<class T >

Block<String> casacore::AipsrcValue< T >::ntlst

private

Definition at line 227 of file AipsrcValue.h.

template<class T >

Mutex casacore::AipsrcValue< T >::theirMutex

staticprivate

Definition at line 223 of file AipsrcValue.h.

template<class T >

Block<T> casacore::AipsrcValue< T >::tlst

private

Register list.

Definition at line 226 of file AipsrcValue.h.

The documentation for this class was generated from the following files:

casa/casacore/casa/System/Aipsrc.h
casa/casacore/casa/System/AipsrcValue.h

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

template<class T> class casacore::AipsrcValue< T >

Intended use:

Review Status

Prerequisite

Etymology

Synopsis

Example

Template Type Argument Requirements

Motivation

Thrown Exceptions

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

template<class T>
class casacore::AipsrcValue< T >