Package icyllis.arc3d.compiler

Class Position

java.lang.Object

icyllis.arc3d.compiler.Position

public final class Position
extends Object

Represents a position that encapsulates the offset and length. It's packed as a int value to reduce object allocation. This class provides static methods to pack and unpack positions.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MAX_OFFSET
static final int	NO_POS

Method Summary

Modifier and Type	Method	Description
static int	getEndOffset(int pos)
static int	getLine(int pos, char[] source)
static int	getStartOffset(int pos)
static int	range(int start, int end)	Pack a range into a position, the position is valid only if start >= 0 && start <= end && end <= 0x7FFFFF.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

NO_POS

public static final int NO_POS

See Also:

• Constant Field Values

MAX_OFFSET

public static final int MAX_OFFSET

See Also:

• Constant Field Values

Method Details

range

public static int range(int start,
 int end)

Pack a range into a position, the position is valid only if start >= 0 && start <= end && end <= 0x7FFFFF.

• 0-24 bits: offset, signed, -1 means invalid
• 24-32 bits: length, unsigned, saturate at 0xFF

Returns:

the position

getStartOffset

public static int getStartOffset(int pos)

getEndOffset

public static int getEndOffset(int pos)

getLine

public static int getLine(int pos,
 char[] source)