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