Instance Method

scanHexDouble:

Scans for a double value from a hexadecimal representation, returning a found value by reference.

Declaration

- (BOOL)scanHexDouble:(double *)result;

Parameters

result

Upon return, contains the scanned value. Contains HUGE_VAL or –HUGE_VAL on overflow, or 0.0 on underflow.

Return Value

YES if the receiver finds a valid double-point representation, otherwise NO. Overflow or underflow are both considered valid floating-point representations.

Discussion

This corresponds to %a or %A formatting. The hexadecimal double representation must be preceded by 0x or 0X.

Skips past excess digits in the case of overflow, so the scanner’s position is past the entire floating-point representation.

Invoke this method with NULL as result to simply scan past a hexadecimal double representation.

See Also

Scanning Numeric Values

- scanDecimal:

Scans for an NSDecimal value, returning a found value by reference.

- scanDouble:

Scans for a double value, returning a found value by reference.

- scanFloat:

Scans for a float value, returning a found value by reference.

- scanHexFloat:

Scans for a double value from a hexadecimal representation, returning a found value by reference.

- scanHexInt:

Scans for an unsigned value from a hexadecimal representation, returning a found value by reference.

- scanHexLongLong:

Scans for a long long value from a hexadecimal representation, returning a found value by reference.

- scanInteger:

Scans for an NSInteger value from a decimal representation, returning a found value by reference

- scanInt:

Scans for an int value from a decimal representation, returning a found value by reference.

- scanLongLong:

Scans for a long long value from a decimal representation, returning a found value by reference.

- scanUnsignedLongLong:

Scans for an unsigned long long value from a decimal representation, returning a found value by reference.