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realconv.def
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1996-08-29
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DEFINITION MODULE RealConv;
(* Low-level REAL/string conversions *)
IMPORT
ConvTypes;
TYPE
ConvResults = ConvTypes.ConvResults;
(* strAllRight, strOutOfRange, strWrongFormat, strEmpty *)
PROCEDURE ScanReal (inputCh: CHAR; VAR chClass: ConvTypes.ScanClass;
VAR nextState: ConvTypes.ScanState);
(*
* Represents the start state of a finite state scanner for real numbers - assigns
* class of inputCh to chClass and a procedure representing the next state to
* nextState.
*)
PROCEDURE FormatReal (str: ARRAY OF CHAR): ConvResults;
(*
* Returns the format of the string value for conversion to REAL.
*)
PROCEDURE ValueReal (str: ARRAY OF CHAR): REAL;
(*
* Returns the value corresponding to the real number string value str if str is
* well-formed; otherwise raises the RealConv exception.
*)
PROCEDURE LengthFloatReal (real: REAL; sigFigs: CARDINAL): CARDINAL;
(*
* Returns the number of characters in the floating-point string representation of
* real with sigFigs significant figures.
*)
PROCEDURE LengthEngReal (real: REAL; sigFigs: CARDINAL): CARDINAL;
(*
* Returns the number of characters in the floating-point engineering string
* representation of real with sigFigs significant figures.
*)
PROCEDURE LengthFixedReal (real: REAL; place: INTEGER): CARDINAL;
(*
* Returns the number of characters in the fixed-point string representation of real
* rounded to the given place relative to the decimal point.
*)
PROCEDURE IsRConvException (): BOOLEAN;
(*
* Returns TRUE if the current coroutine is in the exceptional execution state
* because of the raising of an exception in a routine from this module;
* otherwise returns FALSE.
*)
END RealConv.