Class PointerBuffer
- java.lang.Object
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- org.lwjgl.system.CustomBuffer<PointerBuffer>
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- org.lwjgl.PointerBuffer
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- All Implemented Interfaces:
- java.lang.Comparable<PointerBuffer>, Pointer
public class PointerBuffer extends CustomBuffer<PointerBuffer> implements java.lang.Comparable<PointerBuffer>
This class is a container for architecture-independent pointer data. Its interface mirrors theLongBuffer
API for convenience.
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Nested Class Summary
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Nested classes/interfaces inherited from interface org.lwjgl.system.Pointer
Pointer.Default
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Field Summary
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Fields inherited from interface org.lwjgl.system.Pointer
POINTER_SHIFT, POINTER_SIZE
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method and Description static PointerBuffer
allocateDirect(int capacity)
Allocates a new pointer buffer.int
compareTo(PointerBuffer that)
Compares this buffer to another.static PointerBuffer
create(java.nio.ByteBuffer source)
Creates a new PointerBuffer using the specified ByteBuffer as its pointer data source.static PointerBuffer
create(long address, int capacity)
Creates a new PointerBuffer that starts at the specified memory address and has the specified capacity.boolean
equals(java.lang.Object ob)
Tells whether or not this buffer is equal to another object.long
get()
Relative get method.static long
get(java.nio.ByteBuffer source)
Convenience relative get from a source ByteBuffer.static long
get(java.nio.ByteBuffer source, int index)
Convenience absolute get from a source ByteBuffer.long
get(int index)
Absolute get method.PointerBuffer
get(long[] dst)
Relative bulk get method.PointerBuffer
get(long[] dst, int offset, int length)
Relative bulk get method.java.nio.ByteBuffer
getByteBuffer(int size)
Returns a ByteBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.java.nio.ByteBuffer
getByteBuffer(int index, int size)
Returns a ByteBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.java.nio.DoubleBuffer
getDoubleBuffer(int size)
Returns a DoubleBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.java.nio.DoubleBuffer
getDoubleBuffer(int index, int size)
Returns a DoubleBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.java.nio.FloatBuffer
getFloatBuffer(int size)
Returns a FloatBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.java.nio.FloatBuffer
getFloatBuffer(int index, int size)
Returns a FloatBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.java.nio.IntBuffer
getIntBuffer(int size)
Returns a IntBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.java.nio.IntBuffer
getIntBuffer(int index, int size)
Returns a IntBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.java.nio.LongBuffer
getLongBuffer(int size)
Returns a LongBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.java.nio.LongBuffer
getLongBuffer(int index, int size)
Returns a LongBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.PointerBuffer
getPointerBuffer(int size)
Returns a PointerBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.PointerBuffer
getPointerBuffer(int index, int size)
Returns a PointerBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.java.nio.ShortBuffer
getShortBuffer(int size)
Returns a ShortBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.java.nio.ShortBuffer
getShortBuffer(int index, int size)
Returns a ShortBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.java.lang.String
getStringASCII()
Decodes the ASCII string that starts at the address found at the current position.java.lang.String
getStringASCII(int index)
Decodes the ASCII string that starts at the address found at the specified index.java.lang.String
getStringUTF16()
Decodes the UTF-16 string that starts at the address found at the current position.java.lang.String
getStringUTF16(int index)
Decodes the UTF-16 string that starts at the address found at the specified index.java.lang.String
getStringUTF8()
Decodes the UTF-8 string that starts at the address found at the current position.java.lang.String
getStringUTF8(int index)
Decodes the UTF-8 string that starts at the address found at the specified index.int
hashCode()
Returns the current hash code of this buffer.PointerBuffer
put(java.nio.ByteBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.static void
put(java.nio.ByteBuffer target, int index, long p)
Convenience absolute put on a target ByteBuffer.static void
put(java.nio.ByteBuffer target, long p)
Convenience relative put on a target ByteBuffer.PointerBuffer
put(java.nio.DoubleBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.PointerBuffer
put(java.nio.FloatBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.PointerBuffer
put(java.nio.IntBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.PointerBuffer
put(int index, java.nio.ByteBuffer buffer)
Puts the address of the specified buffer at the specified index.PointerBuffer
put(int index, java.nio.DoubleBuffer buffer)
Puts the address of the specified buffer at the specified index.PointerBuffer
put(int index, java.nio.FloatBuffer buffer)
Puts the address of the specified buffer at the specified index.PointerBuffer
put(int index, java.nio.IntBuffer buffer)
Puts the address of the specified buffer at the specified index.PointerBuffer
put(int index, long p)
Absolute put method (optional operation).PointerBuffer
put(int index, java.nio.LongBuffer buffer)
Puts the address of the specified buffer at the specified index.PointerBuffer
put(int index, Pointer pointer)
Puts the pointer value of the specifiedPointer
at the specified index.PointerBuffer
put(int index, java.nio.ShortBuffer buffer)
Puts the address of the specified buffer at the specified index.PointerBuffer
put(long p)
Relative put method (optional operation).PointerBuffer
put(long[] src)
Relative bulk put method (optional operation).PointerBuffer
put(long[] src, int offset, int length)
Relative bulk put method (optional operation).PointerBuffer
put(java.nio.LongBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.PointerBuffer
put(Pointer pointer)
Puts the pointer value of the specifiedPointer
at the current position and then increments the position.PointerBuffer
put(java.nio.ShortBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.PointerBuffer
putAddressOf(int index, PointerBuffer buffer)
Puts the address of the specified buffer at the specified index.PointerBuffer
putAddressOf(PointerBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.int
sizeof()
Returns thesizeof
a single element in the buffer.
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Method Detail
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allocateDirect
public static PointerBuffer allocateDirect(int capacity)
Allocates a new pointer buffer.The new buffer's position will be zero, its limit will be its capacity, and its mark will be undefined.
- Parameters:
capacity
- the new buffer's capacity, in pointers- Returns:
- the new pointer buffer
- Throws:
java.lang.IllegalArgumentException
- If the capacity is a negative integer
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create
public static PointerBuffer create(long address, int capacity)
Creates a new PointerBuffer that starts at the specified memory address and has the specified capacity.- Parameters:
address
- the starting memory addresscapacity
- the buffer capacity, in number of pointers
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create
public static PointerBuffer create(java.nio.ByteBuffer source)
Creates a new PointerBuffer using the specified ByteBuffer as its pointer data source.- Parameters:
source
- the source buffer
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sizeof
public int sizeof()
Description copied from class:CustomBuffer
Returns thesizeof
a single element in the buffer.- Specified by:
sizeof
in classCustomBuffer<PointerBuffer>
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get
public long get()
Relative get method. Reads the pointer at this buffer's current position, and then increments the position.- Returns:
- the pointer at the buffer's current position
- Throws:
java.nio.BufferUnderflowException
- If the buffer's current position is not smaller than its limit
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get
public static long get(java.nio.ByteBuffer source)
Convenience relative get from a source ByteBuffer.- Parameters:
source
- the source ByteBuffer
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put
public PointerBuffer put(long p)
Relative put method (optional operation).Writes the specified pointer into this buffer at the current position, and then increments the position.
- Parameters:
p
- the pointer to be written- Returns:
- This buffer
- Throws:
java.nio.BufferOverflowException
- If this buffer's current position is not smaller than its limitjava.nio.ReadOnlyBufferException
- If this buffer is read-only
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put
public static void put(java.nio.ByteBuffer target, long p)
Convenience relative put on a target ByteBuffer.- Parameters:
target
- the target ByteBufferp
- the pointer value to be written
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get
public long get(int index)
Absolute get method. Reads the pointer at the specified index.- Parameters:
index
- the index from which the pointer will be read- Returns:
- the pointer at the specified index
- Throws:
java.lang.IndexOutOfBoundsException
- If index is negative or not smaller than the buffer's limit
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get
public static long get(java.nio.ByteBuffer source, int index)
Convenience absolute get from a source ByteBuffer.- Parameters:
source
- the source ByteBufferindex
- the index at which the pointer will be read
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put
public PointerBuffer put(int index, long p)
Absolute put method (optional operation).Writes the specified pointer into this buffer at the specified index.
- Parameters:
index
- the index at which the pointer will be writtenp
- the pointer value to be written- Returns:
- This buffer
- Throws:
java.lang.IndexOutOfBoundsException
- If index is negative or not smaller than the buffer's limitjava.nio.ReadOnlyBufferException
- If this buffer is read-only
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put
public static void put(java.nio.ByteBuffer target, int index, long p)
Convenience absolute put on a target ByteBuffer.- Parameters:
target
- the target ByteBufferindex
- the index at which the pointer will be writtenp
- the pointer value to be written
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put
public PointerBuffer put(Pointer pointer)
Puts the pointer value of the specifiedPointer
at the current position and then increments the position.
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put
public PointerBuffer put(int index, Pointer pointer)
Puts the pointer value of the specifiedPointer
at the specified index.
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put, putAddressOf
public PointerBuffer put(java.nio.ByteBuffer buffer) public PointerBuffer put(java.nio.ShortBuffer buffer) public PointerBuffer put(java.nio.IntBuffer buffer) public PointerBuffer put(java.nio.LongBuffer buffer) public PointerBuffer put(java.nio.FloatBuffer buffer) public PointerBuffer put(java.nio.DoubleBuffer buffer) public PointerBuffer putAddressOf(PointerBuffer buffer)
Puts the address of the specified buffer at the current position and then increments the position.
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put, putAddressOf
public PointerBuffer put(int index, java.nio.ByteBuffer buffer) public PointerBuffer put(int index, java.nio.ShortBuffer buffer) public PointerBuffer put(int index, java.nio.IntBuffer buffer) public PointerBuffer put(int index, java.nio.LongBuffer buffer) public PointerBuffer put(int index, java.nio.FloatBuffer buffer) public PointerBuffer put(int index, java.nio.DoubleBuffer buffer) public PointerBuffer putAddressOf(int index, PointerBuffer buffer)
Puts the address of the specified buffer at the specified index.
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getByteBuffer
public java.nio.ByteBuffer getByteBuffer(int size)
Returns a ByteBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.
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getShortBuffer
public java.nio.ShortBuffer getShortBuffer(int size)
Returns a ShortBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.
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getIntBuffer
public java.nio.IntBuffer getIntBuffer(int size)
Returns a IntBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.
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getLongBuffer
public java.nio.LongBuffer getLongBuffer(int size)
Returns a LongBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.
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getFloatBuffer
public java.nio.FloatBuffer getFloatBuffer(int size)
Returns a FloatBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.
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getDoubleBuffer
public java.nio.DoubleBuffer getDoubleBuffer(int size)
Returns a DoubleBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.
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getPointerBuffer
public PointerBuffer getPointerBuffer(int size)
Returns a PointerBuffer instance that starts at the address found at the current position and has capacity equal to the specified size.
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getStringASCII
public java.lang.String getStringASCII()
Decodes the ASCII string that starts at the address found at the current position.
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getStringUTF8
public java.lang.String getStringUTF8()
Decodes the UTF-8 string that starts at the address found at the current position.
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getStringUTF16
public java.lang.String getStringUTF16()
Decodes the UTF-16 string that starts at the address found at the current position.
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getByteBuffer
public java.nio.ByteBuffer getByteBuffer(int index, int size)
Returns a ByteBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.
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getShortBuffer
public java.nio.ShortBuffer getShortBuffer(int index, int size)
Returns a ShortBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.
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getIntBuffer
public java.nio.IntBuffer getIntBuffer(int index, int size)
Returns a IntBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.
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getLongBuffer
public java.nio.LongBuffer getLongBuffer(int index, int size)
Returns a LongBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.
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getFloatBuffer
public java.nio.FloatBuffer getFloatBuffer(int index, int size)
Returns a FloatBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.
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getDoubleBuffer
public java.nio.DoubleBuffer getDoubleBuffer(int index, int size)
Returns a DoubleBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.
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getPointerBuffer
public PointerBuffer getPointerBuffer(int index, int size)
Returns a PointerBuffer instance that starts at the address found at the specified index and has capacity equal to the specified size.
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getStringASCII
public java.lang.String getStringASCII(int index)
Decodes the ASCII string that starts at the address found at the specified index.
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getStringUTF8
public java.lang.String getStringUTF8(int index)
Decodes the UTF-8 string that starts at the address found at the specified index.
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getStringUTF16
public java.lang.String getStringUTF16(int index)
Decodes the UTF-16 string that starts at the address found at the specified index.
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get
public PointerBuffer get(long[] dst)
Relative bulk get method.This method transfers pointers from this buffer into the specified destination array. An invocation of this method of the form src.get(a) behaves in exactly the same way as the invocation
src.get(a, 0, a.length)
- Returns:
- This buffer
- Throws:
java.nio.BufferUnderflowException
- If there are fewer than length pointers remaining in this buffer
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get
public PointerBuffer get(long[] dst, int offset, int length)
Relative bulk get method.This method transfers pointers from this buffer into the specified destination array. If there are fewer pointers remaining in the buffer than are required to satisfy the request, that is, if length > remaining(), then no pointers are transferred and a
BufferUnderflowException
is thrown.Otherwise, this method copies length pointers from this buffer into the specified array, starting at the current position of this buffer and at the specified offset in the array. The position of this buffer is then incremented by length.
In other words, an invocation of this method of the form src.get(dst, off, len) has exactly the same effect as the loop
for (int i = off; i < off + len; i++) dst[i] = src.get();
except that it first checks that there are sufficient pointers in this buffer and it is potentially much more efficient.
- Parameters:
dst
- the array into which pointers are to be writtenoffset
- the offset within the array of the first pointer to be written; must be non-negative and no larger than dst.lengthlength
- the maximum number of pointers to be written to the specified array; must be non-negative and no larger than dst.length - offset- Returns:
- This buffer
- Throws:
java.nio.BufferUnderflowException
- If there are fewer than length pointers remaining in this bufferjava.lang.IndexOutOfBoundsException
- If the preconditions on the offset and length parameters do not hold
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put
public PointerBuffer put(long[] src)
Relative bulk put method (optional operation).This method transfers the entire content of the specified source pointer array into this buffer. An invocation of this method of the form dst.put(a) behaves in exactly the same way as the invocation
dst.put(a, 0, a.length)
- Returns:
- This buffer
- Throws:
java.nio.BufferOverflowException
- If there is insufficient space in this bufferjava.nio.ReadOnlyBufferException
- If this buffer is read-only
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put
public PointerBuffer put(long[] src, int offset, int length)
Relative bulk put method (optional operation).This method transfers pointers into this buffer from the specified source array. If there are more pointers to be copied from the array than remain in this buffer, that is, if length > remaining(), then no pointers are transferred and a
BufferOverflowException
is thrown.Otherwise, this method copies length pointers from the specified array into this buffer, starting at the specified offset in the array and at the current position of this buffer. The position of this buffer is then incremented by length.
In other words, an invocation of this method of the form dst.put(src, off, len) has exactly the same effect as the loop
for (int i = off; i < off + len; i++) dst.put(a[i]);
except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient.
- Parameters:
src
- the array from which pointers are to be readoffset
- the offset within the array of the first pointer to be read; must be non-negative and no larger than array.lengthlength
- the number of pointers to be read from the specified array; must be non-negative and no larger than array.length - offset- Returns:
- This buffer
- Throws:
java.nio.BufferOverflowException
- If there is insufficient space in this bufferjava.lang.IndexOutOfBoundsException
- If the preconditions on the offset and length parameters do not holdjava.nio.ReadOnlyBufferException
- If this buffer is read-only
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hashCode
public int hashCode()
Returns the current hash code of this buffer.The hash code of a pointer buffer depends only upon its remaining elements; that is, upon the elements from position() up to, and including, the element at limit() - 1.
Because buffer hash codes are content-dependent, it is inadvisable to use buffers as keys in hash maps or similar data structures unless it is known that their contents will not change.
- Overrides:
hashCode
in classjava.lang.Object
- Returns:
- the current hash code of this buffer
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equals
public boolean equals(java.lang.Object ob)
Tells whether or not this buffer is equal to another object.Two pointer buffers are equal if, and only if,
- They have the same element type,
- They have the same number of remaining elements, and
- The two sequences of remaining elements, considered independently of their starting positions, are pointwise equal.
A pointer buffer is not equal to any other type of object.
- Overrides:
equals
in classjava.lang.Object
- Parameters:
ob
- the object to which this buffer is to be compared- Returns:
- true if, and only if, this buffer is equal to the given object
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compareTo
public int compareTo(PointerBuffer that)
Compares this buffer to another.Two pointer buffers are compared by comparing their sequences of remaining elements lexicographically, without regard to the starting position of each sequence within its corresponding buffer.
A pointer buffer is not comparable to any other type of object.
- Specified by:
compareTo
in interfacejava.lang.Comparable<PointerBuffer>
- Returns:
- A negative integer, zero, or a positive integer as this buffer is less than, equal to, or greater than the specified buffer
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