DeserializeHexReal (FUN)

FUNCTION DeserializeHexReal : BOOL

Converts a string of the format

R16#{Mantissa}H{Exponent} | R16#NaN | R16#+Inf | R16#-Inf

where both mantissa and exponent are hexadecimal numerals, such that liM * 2^iE = {Mantissa} * 16^{Exponent}.

Returns true on success and false if the format is invalid or if an overflow occurred (i.e. when the mantissa does not fit into an LINT or the exponent does not fit into an INT.)

Note

• Leading whitespace is not allowed.

• Any characters that come after the hex real are ignored.

See also SerializeHexReal.

InOut:

Scope	Name	Type	Comment
Return	DeserializeHexReal	BOOL
Input	ps	POINTER TO BYTE	Pointer to the input string
Output	liM	LINT	The (signed) mantissa
	iE	INT	The (unbiased) exponent
	xNaN	BOOL	True iff ps^ is ‘F16#NaN’, iE and diM are 0 in this case
	xInf	BOOL	True iff ps^ is ‘F16#+Inf’ of ‘F16#-Inf’, diM = 1 for +Infinity and -1 for -Infinity, iE is 0