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-- File: Units.cdl
-- Created: Mon Jun 22 18:23:44 1992
-- Author: Gilles DEBARBOUILLE
-- <gde@phobox>
-- Modified Wed Apr 2 14:10:05 1997 by Gerard GRAS
-- Add FirstQuantity access methods
-- Modified Mon Apr 7 16:52:40 1997 by Patrick BOSINCO
-- Add Dimensions access methods
---Copyright: Matra Datavision 1992
package Units
---Purpose: This package provides all the facilities to create
-- and question a dictionary of units, and also to
-- manipulate measurements which are real values with
-- units.
uses
TCollection,
TColStd
is
class Dimensions;
class Unit;
class UtsSequence instantiates
Sequence from TCollection (Unit from Units);
class UnitsSequence instantiates
HSequence from TCollection(Unit from Units, UtsSequence);
private class ShiftedUnit;
class Token ;
class ShiftedToken ;
class TksSequence instantiates
Sequence from TCollection (Token from Units);
class TokensSequence instantiates
HSequence from TCollection(Token from Units, TksSequence);
class Quantity;
class QtsSequence instantiates
Sequence from TCollection (Quantity from Units);
class QuantitiesSequence instantiates
HSequence from TCollection(Quantity from Units, QtsSequence);
class UnitsDictionary;
class UnitsSystem;
class Explorer;
private class Sentence;
private class MathSentence;
private class UnitSentence;
class Lexicon;
private class UnitsLexicon;
class Measurement;
exception NoSuchUnit inherits NoSuchObject from Standard;
exception NoSuchType inherits NoSuchObject from Standard;
UnitsFile(afile : CString);
---Level: Public
---Purpose: Defines the location of the file containing all the
-- information useful in creating the dictionary of all
-- the units known to the system.
LexiconFile(afile : CString);
---Level: Public
---Purpose: Defines the location of the file containing the lexicon
-- useful in manipulating composite units.
DictionaryOfUnits(amode : Boolean = Standard_False) returns UnitsDictionary from Units;
---Level: Advanced
---Purpose: Returns a unique instance of the dictionary of units.
-- If <amode> is True, then it forces the recomputation of
-- the dictionary of units.
Quantity(aquantity : CString from Standard) returns Quantity from Units;
---Level: Advanced
---Purpose: Returns a unique quantity instance corresponding to <aquantity>.
FirstQuantity(aunit : CString from Standard) returns CString from Standard;
---Level: Advanced
---Purpose: Returns the first quantity string founded from the unit <aUnit>.
LexiconUnits(amode : Boolean = Standard_True) returns Lexicon from Units;
---Level: Internal
---Purpose: Returns a unique instance of the Units_Lexicon.
-- If <amode> is True, it forces the recomputation of
-- the dictionary of units, and by consequence the
-- completion of the Units_Lexicon.
LexiconFormula returns Lexicon from Units;
---Level: Internal
---Purpose: Return a unique instance of LexiconFormula.
NullDimensions returns Dimensions from Units;
---Level: Internal
---Purpose: Returns always the same instance of Dimensions.
Convert(avalue : Real ; afirstunit , asecondunit : CString) returns Real;
---Level: Public
---Purpose: Converts <avalue> expressed in <afirstunit> into the <asecondunit>.
ToSI(aData: Real from Standard; aUnit: CString from Standard) returns Real from Standard;
ToSI(aData: Real from Standard; aUnit: CString from Standard;
aDim : out Dimensions from Units) returns Real from Standard;
FromSI(aData: Real from Standard; aUnit: CString from Standard) returns Real from Standard;
FromSI(aData: Real from Standard; aUnit: CString from Standard;
aDim : out Dimensions from Units ) returns Real from Standard;
Dimensions(aType : CString from Standard)
returns Dimensions from Units
raises NoSuchObject from Standard;
---Level: Public
---Purpose: return the dimension associated to the Type
end Units;
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