Pointed String class to aid analysis of quantity strings. More...

#include <MUString.h>

Public Member Functions
	MUString ()
	Default constructor creates an empty string. More...

	MUString (const String &in)
	Create from String; setting pointer at start. More...

	MUString (const Char *in)

	MUString (char in)

	MUString (const MUString &other)
	Copy constructor; new pointer will be same as old. More...

MUString &	operator= (const MUString &other)
	Copy assignment; new pointer will be same as old. More...

	~MUString ()
	Destructor. More...

String	operator() ()
	Obtain remaining string (same as `get()`). More...

void	push ()
	Save current pointer on internal stack. More...

void	pop ()
	Restore pointer from stack (or set to start if stack empty) More...

void	unpush ()
	Restore stack for one level. More...

void	skipBlank ()
	Act on whitespace; adjusting pointer if skip. More...

Bool	testBlank () const

Bool	tSkipBlank ()

void	skipSign ()
	Act on sign; return +1 or -1 depending on signs found (– == +) More...

Bool	testSign () const

Bool	tSkipSign ()

Int	getSign ()

void	skipInt ()
	Act on integer field. More...

Bool	testInt () const

Bool	tSkipInt ()

Int	getInt ()

void	skipuInt ()

Bool	tSkipuInt ()

Bool	testuInt () const

uInt	getuInt ()

void	skipDouble ()
	Act on Double field. More...

Bool	testDouble () const

Bool	tSkipDouble ()

Double	getDouble ()

void	skipChar (Int n=1)
	Act on character(s) More...

void	skipChar (Char ch)

Bool	tSkipChar (Char nc)

void	skipCharNC (Char ch)

Bool	tSkipCharNC (Char ch)

Bool	tSkipOneChar (Char ch)

Bool	tSkipOneCharNC (Char ch)

void	skipChar (const Regex &ex)

Bool	tSkipChar (const Regex &ex)

void	skipAlpha ()

Bool	tSkipAlpha ()

void	skipNum ()

Bool	tSkipNum ()

void	skipAlphaNum ()

Bool	tSkipAlphaNum ()

Bool	testChar (Char ch) const

Bool	testCharNC (Char ch) const

Bool	testChar (const Regex &ex) const

Bool	testAlpha () const

Bool	testNum () const

Bool	testAlphaNum () const

Char	getChar ()

String	getAlpha ()

String	getAlphaNum ()

Bool	testString (const Regex &ex) const
	Act on series of characters. More...

Bool	testString (const String &ex) const

Bool	testStringNC (const String &ex) const

Bool	tSkipString (const Regex &ex)

Bool	tSkipString (const String &ex)

Bool	tSkipStringNC (const String &ex)

void	skipString (const Regex &ex)

void	skipString (const String &ex)

void	skipStringNC (const String &ex)

String	getString (const Regex &ex)

String	getString (const String &ex)

String	getStringNC (const String &ex)

Bool	matchPair (Char nd)
	Match a pair of opening(at pointer)/closing characters (e.g. More...

Int	freqChar (Char ch) const
	Get frequency of occurrence. More...

String	get ()
	Get part of string. More...

String	get (uInt st)

String	get (uInt st, uInt nd)

Int	getPtr () const
	Get pointer. More...

void	setPtr (Int in=0)
	(Re-)set pointer More...

Bool	eos () const
	test for end of string More...

Bool	status () const
	Get status last get. More...

const String &	lastGet () const
	Get String found at last get. More...

Static Public Member Functions
static uInt	minimaxNC (const String &in, Int N_name, const String tname[])
	Do minimax check on list of Strings. More...

static uInt	minimaxNC (const String &in, const Vector< String > &tname)

Private Member Functions
void	adjustPtr (Int in)
	Member functions Make a new pointer between 0 and len inclusive. More...

Int	initLast ()
	Initialise last settings; return pointer. More...

void	setLast (Int st)
	Set last settings. More...

Private Attributes
String	str
	Data String value More...

uInt	ptr
	0-based pointer into string More...

uInt	len
	Length of string. More...

Block< uInt >	stack
	Pointer stack. More...

uInt	stpt
	Pointer into stack. More...

Bool	stat
	Status of last get. More...

String	lget
	String found at last get. More...

Friends
ostream &	operator<< (ostream &os, const MUString &in)
	Output String starting at pointer. More...

Detailed Description

Pointed String class to aid analysis of quantity strings.

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25
Test programs:: tMeasure

Prerequisite

(see (classString))String

Etymology

From Measure Utility String

Synopsis

The MUString is a class with a String and an embedded pointer. It can be used to linearly analyse a string for its semantics. Imagine for instance a string that represents an angle. It could be formatted as [+-]hh:mm:ss.ttt or as [+-]hh[hH]mm[mM] or as [+-]dd.mm.ss.ttt or with .'s replaced with dms or as [+-]ddd.fff deg etc.
The available methods aid in analysing this string (see example).
The following analysis method classes are avaible:

construct – all constructors create a string with the pointer starting at the beginning of the string
testX(arg) – all test methods test if the next available character(s) fulfill the specified argument test. E.g. Bool testSign() test if current character is + or -. If at end of string; False is returned, except for testBlank(). No pointer update. Any method with NC at the end (for no-case) will test irrespective of the case.
skipX(arg) – all skip methods skip all available character(s) fulfilling the specified argument. E.g. void skipSign() will skip all + and - found at the current and subsequent positions. Pointer updated.
tSkipX(arg) – will skip as skipX, and return Bool as in testX. Pointer updated
getX(arg) – will get the indicated X value from the string. Pointer updated. A get will always return a valid result. However, if the value did not exist (e.g. Double getDouble() form a string like "abc" will return 0.0) a False status will be saved. It can be interrogated by the Bool status() function. The string part used in producing the value is also saved, and can be obtained with const String &lastGet(). No saving in case of a simple getChar() is done.
stack – if it is necessary to save the current position of the pointer (for maybe later restoration) a void push() and void pop() are available
pointer – the pointer can be manipulated with void setPtr() and Int getPtr(). Pointers are always protected in their value.

The following types (X in the above list) are available

Char – a single character
CharNC – a single character with no case
String – a string
StringNC – a string without case
Alpha – a through z and A through Z and _ (underscore)
Num – digits 0 through 9
AlphaNum – a field staring with Alpha, and remainder (if any) Alpha or Num
Sign – a plus or minus
Blank – a space ar a tab
uInt – unsigned integer
Int – an optionally signed integer
Double – a double value

General string aids are available. The main one a minimax, caseless check of an input String against a vector: static uInt minimaxNC(String in, Int N_name, String name[]) and its vector equivalent: static uInt minimaxNC(String in, Vector<String> name). Success is indicated by a return value less than N_name or the vector length.

Example

See MVAngle class for example background. The following example is the conversion of different input angle formats to a Quantity. A full blown example, but gives some idea of intricacies involved.

res = Quantity(0.0, "rad");    // result
MUString tmp(in);      // Pointed non-const String
tmp.skipBlank();
Double s = tmp.getSign();  // sign
tmp.push();            // Save position to rescan
Double r = tmp.getuInt();  // first field
Int tp = 0;            // distributor
if (tmp.tSkipChar('.')) {  // if more than one., dms format
Double r1 = tmp.getuInt();
if (tmp.tSkipChar('.')) {
r += r1/60.0 + tmp.getDouble()/3600.0;
tp = 4;
} else {           // else value with units
tmp.pop();     // Reset position
r = tmp.getDouble();
};
} else if (tmp.tSkipCharNC('d')) { // dms
tp = 1;
} else if (tmp.tSkipCharNC('h')) { // hms
tp = 2;
} else if (tmp.tSkipChar(':')) {   // hms
tp = 3;
};
switch (tp) {
case 0: {
UnitVal u; String us;
if (!MVAngle::unitString(u,us,tmp)) return False;
r *= s;
if (u == UnitVal::NODIM) { // check correct dimension
res = Quantity(r,"rad");
return True;
};
if (u == UnitVal::ANGLE) {
res = Quantity(r,us);
return True;
};
if (u == UnitVal::TIME) {
res = Quantity(Quantity(r/240.,us).getBaseValue(), "deg");
return True;
};
return False;
};
break;
case 1:
case 2:
case 3: {          // get remainder od ms and hms formats
Char tc = 'm';
if (tp == 3) tc = ':';
tmp.push();
Double r1 = tmp.getuInt();
if (tmp.tSkipChar('.')) {
tmp.pop();
r += tmp.getDouble()/3600.;
} else if (tmp.tSkipCharNC(tc)) {
r += r1/60.0 + tmp.getDouble()/3600.;
} else {
r += r1/3600.0;
};
r *= s;
};
break;
default:
break;
};
switch (tp) {      // make correct units
case 1:
case 4:
res = Quantity(r,"deg");
break;
case 2:
case 3:
res = Quantity(Quantity(r/240.,"h").getBaseValue(), "deg");
break;
default:
break;
};
return True;

Motivation

The class was written to be able to analyse an input string for its Quantum representation as value with units, or os a date/time or as an angle.

To Do

nothing I know of

Definition at line 229 of file MUString.h.

Constructor & Destructor Documentation

casacore::MUString::MUString ( )

Default constructor creates an empty string.

casacore::MUString::MUString ( const String & in )

Create from String; setting pointer at start.

casacore::MUString::MUString ( const Char * in )

casacore::MUString::MUString ( char in )

casacore::MUString::MUString ( const MUString & other )

Copy constructor; new pointer will be same as old.

casacore::MUString::~MUString ( )

Destructor.

Member Function Documentation

void casacore::MUString::adjustPtr ( Int in )

private

Member functions Make a new pointer between 0 and len inclusive.

Bool casacore::MUString::eos ( ) const

test for end of string

Int casacore::MUString::freqChar ( Char ch ) const

Get frequency of occurrence.

String casacore::MUString::get ( )

Get part of string.

String casacore::MUString::get ( uInt st )

String casacore::MUString::get	(	uInt	st,
		uInt	nd
	)

String casacore::MUString::getAlpha ( )

String casacore::MUString::getAlphaNum ( )

Char casacore::MUString::getChar ( )

Double casacore::MUString::getDouble ( )

Int casacore::MUString::getInt ( )

Int casacore::MUString::getPtr ( ) const

Get pointer.

Int casacore::MUString::getSign ( )

String casacore::MUString::getString ( const Regex & ex )

String casacore::MUString::getString ( const String & ex )

String casacore::MUString::getStringNC ( const String & ex )

uInt casacore::MUString::getuInt ( )

Int casacore::MUString::initLast ( )

private

Initialise last settings; return pointer.

const String& casacore::MUString::lastGet ( ) const

Get String found at last get.

Bool casacore::MUString::matchPair ( Char nd )

Match a pair of opening(at pointer)/closing characters (e.g.

(and)). Return False if wrong semantics. The string between the pair (excluding them) will be put in Last. If false, the ptr will be as originally; if True it will point beyond the matched closing character

static uInt casacore::MUString::minimaxNC	(	const String &	in,
		Int	N_name,
		const String	tname[]
	)

static

Do minimax check on list of Strings.

static uInt casacore::MUString::minimaxNC	(	const String &	in,
		const Vector< String > &	tname
	)

static

String casacore::MUString::operator() ( )

Obtain remaining string (same as get()).

MUString& casacore::MUString::operator= ( const MUString & other )

Copy assignment; new pointer will be same as old.

void casacore::MUString::pop ( )

Restore pointer from stack (or set to start if stack empty)

void casacore::MUString::push ( )

Save current pointer on internal stack.

void casacore::MUString::setLast ( Int st )

private

Set last settings.

void casacore::MUString::setPtr ( Int in = 0 )

(Re-)set pointer

void casacore::MUString::skipAlpha ( )

void casacore::MUString::skipAlphaNum ( )

void casacore::MUString::skipBlank ( )

Act on whitespace; adjusting pointer if skip.

void casacore::MUString::skipChar ( Int n = 1 )

Act on character(s)

void casacore::MUString::skipChar ( Char ch )

void casacore::MUString::skipChar ( const Regex & ex )

void casacore::MUString::skipCharNC ( Char ch )

void casacore::MUString::skipDouble ( )

Act on Double field.

If no value 0 returned and False.

void casacore::MUString::skipInt ( )

Act on integer field.

If no integer found in 0 returned; and False

void casacore::MUString::skipNum ( )

void casacore::MUString::skipSign ( )

Act on sign; return +1 or -1 depending on signs found (– == +)

void casacore::MUString::skipString ( const Regex & ex )

void casacore::MUString::skipString ( const String & ex )

void casacore::MUString::skipStringNC ( const String & ex )

void casacore::MUString::skipuInt ( )

Bool casacore::MUString::status ( ) const

Get status last get.

Bool casacore::MUString::testAlpha ( ) const

Bool casacore::MUString::testAlphaNum ( ) const

Bool casacore::MUString::testBlank ( ) const

Bool casacore::MUString::testChar ( Char ch ) const

Bool casacore::MUString::testChar ( const Regex & ex ) const

Bool casacore::MUString::testCharNC ( Char ch ) const

Bool casacore::MUString::testDouble ( ) const

Bool casacore::MUString::testInt ( ) const

Bool casacore::MUString::testNum ( ) const

Bool casacore::MUString::testSign ( ) const

Bool casacore::MUString::testString ( const Regex & ex ) const

Act on series of characters.

Bool casacore::MUString::testString ( const String & ex ) const

Bool casacore::MUString::testStringNC ( const String & ex ) const

Bool casacore::MUString::testuInt ( ) const

Bool casacore::MUString::tSkipAlpha ( )

Bool casacore::MUString::tSkipAlphaNum ( )

Bool casacore::MUString::tSkipBlank ( )

Bool casacore::MUString::tSkipChar ( Char nc )

Bool casacore::MUString::tSkipChar ( const Regex & ex )

Bool casacore::MUString::tSkipCharNC ( Char ch )

Bool casacore::MUString::tSkipDouble ( )

Bool casacore::MUString::tSkipInt ( )

Bool casacore::MUString::tSkipNum ( )

Bool casacore::MUString::tSkipOneChar ( Char ch )

Bool casacore::MUString::tSkipOneCharNC ( Char ch )

Bool casacore::MUString::tSkipSign ( )

Bool casacore::MUString::tSkipString ( const Regex & ex )

Bool casacore::MUString::tSkipString ( const String & ex )

Bool casacore::MUString::tSkipStringNC ( const String & ex )

Bool casacore::MUString::tSkipuInt ( )

void casacore::MUString::unpush ( )

Restore stack for one level.

Friends And Related Function Documentation

ostream& operator<<	(	ostream &	os,
		const MUString &	in
	)

friend

Output String starting at pointer.

Member Data Documentation

uInt casacore::MUString::len

private

Length of string.

Definition at line 392 of file MUString.h.

String casacore::MUString::lget

private

String found at last get.

Definition at line 400 of file MUString.h.

uInt casacore::MUString::ptr

private

0-based pointer into string

Definition at line 390 of file MUString.h.

Block<uInt> casacore::MUString::stack

private

Pointer stack.

Definition at line 394 of file MUString.h.

Bool casacore::MUString::stat

private

Status of last get.

Definition at line 398 of file MUString.h.

uInt casacore::MUString::stpt

private

Pointer into stack.

Definition at line 396 of file MUString.h.

String casacore::MUString::str

private

Data

String value

Definition at line 388 of file MUString.h.

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

casa/Utilities/MUString.h

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Friends

Detailed Description

Review Status

Prerequisite

Etymology

Synopsis

Example

Motivation

To Do

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation