AbstractBufferMemoryIO (jnr-ffi 2.1.7 API)

java.lang.Object
- jnr.ffi.Pointer
- - jnr.ffi.provider.AbstractMemoryIO
  - - jnr.ffi.provider.AbstractBufferMemoryIO

Direct Known Subclasses:: ByteBufferMemoryIO

public abstract class AbstractBufferMemoryIO
extends AbstractMemoryIO

Field Summary

Fields
Modifier and Type Field and Description

protected ByteBuffer buffer

Fields
Modifier and Type	Field and Description
`protected ByteBuffer`	`buffer`

Constructor Summary

Constructors
Constructor and Description

AbstractBufferMemoryIO(Runtime runtime, ByteBuffer buffer, long address)

Constructors
Constructor and Description
`AbstractBufferMemoryIO(Runtime runtime, ByteBuffer buffer, long address)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Object`	`array()` Returns the array that backs this pointer.
`int`	`arrayLength()` Returns the length of this pointer's backing array that is used by this pointer.
`int`	`arrayOffset()` Returns the offset within this pointer's backing array of the first element.
`void`	`get(long offset, byte[] dst, int off, int len)` Bulk get method for multiple `byte` values.
`void`	`get(long offset, double[] dst, int off, int len)` Bulk get method for multiple `double` values.
`void`	`get(long offset, float[] dst, int off, int len)` Bulk get method for multiple `float` values.
`void`	`get(long offset, int[] dst, int off, int len)` Bulk get method for multiple `int` values.
`void`	`get(long offset, long[] dst, int off, int len)` Bulk get method for multiple `long` values.
`void`	`get(long offset, short[] dst, int off, int len)` Bulk get method for multiple `short` values.
`byte`	`getByte(long offset)` Reads an `byte` (8 bit) value at the given offset.
`ByteBuffer`	`getByteBuffer()`
`double`	`getDouble(long offset)` Reads a `double` (64 bit) value at the given offset.
`float`	`getFloat(long offset)` Reads a `float` (32 bit) value at the given offset.
`int`	`getInt(long offset)` Reads an `int` (32 bit) value at the given offset.
`long`	`getLongLong(long offset)` Reads a `long` (64 bit) value at the given offset.
`short`	`getShort(long offset)` Reads a `short` (16 bit) value at the given offset.
`String`	`getString(long offset)` Reads an `String` value at the given offset.
`String`	`getString(long offset, int size)`
`String`	`getString(long offset, int maxLength, Charset cs)` Reads a `String` value at the given offset, using a specific `Charset`
`boolean`	`hasArray()` Indicates whether this `Pointer` instance is backed by an array.
`int`	`indexOf(long offset, byte value, int maxlen)` Returns the location of a byte value within the memory area represented by this `Pointer`.
`void`	`put(long offset, byte[] dst, int off, int len)` Bulk put method for multiple `byte` values.
`void`	`put(long offset, double[] src, int off, int len)` Bulk put method for multiple `double` values.
`void`	`put(long offset, float[] src, int off, int len)` Bulk put method for multiple `float` values.
`void`	`put(long offset, int[] src, int off, int len)` Bulk put method for multiple `int` values.
`void`	`put(long offset, long[] src, int off, int len)` Bulk put method for multiple `long` values.
`void`	`put(long offset, short[] dst, int off, int len)` Bulk put method for multiple `short` values.
`void`	`putByte(long offset, byte value)` Writes a `byte` (8 bit) value at the given offset.
`void`	`putDouble(long offset, double value)` Writes a `double` (64 bit, double precision) value at the given offset.
`void`	`putFloat(long offset, float value)` Writes a `float` (32 bit, single precision) value at the given offset.
`void`	`putInt(long offset, int value)` Writes an `int` (32 bit) value at the given offset.
`void`	`putLongLong(long offset, long value)` Writes a `long` (64 bit) value at the given offset.
`void`	`putShort(long offset, short value)` Writes a `short` (16 bit) value at the given offset.
`void`	`putString(long offset, String string)`
`void`	`putString(long offset, String string, int maxLength, Charset cs)` Writes a `String` value at the given offset, using a specific `Charset`
`void`	`setMemory(long offset, long size, byte value)` Sets the value of each byte in the memory area represented by this `Pointer`.
`long`	`size()` Gets the size of this memory object in bytes (optional operation).

Methods inherited from class jnr.ffi.provider.AbstractMemoryIO
checkBounds, checkBounds, getAddress, getInt, getLong, getNativeLong, indexOf, putAddress, putAddress, putInt, putLong, putNativeLong, slice, slice, transferFrom, transferTo

Methods inherited from class jnr.ffi.Pointer
address, get, getNullTerminatedPointerArray, getNullTerminatedStringArray, getPointer, getPointer, getRuntime, isDirect, newIntPointer, put, putPointer, toString, wrap, wrap, wrap

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - buffer
```
protected final ByteBuffer buffer
```
- Constructor Detail
  - AbstractBufferMemoryIO
```
public AbstractBufferMemoryIO(Runtime runtime,
                              ByteBuffer buffer,
                              long address)
```
- Method Detail
  - size
```
public long size()
```
    Description copied from class: Pointer
    
    Gets the size of this memory object in bytes (optional operation).
    
    Specified by:
    
    size in class Pointer
    
    Returns:
    
    the size of the memory area this Pointer points to. If the size is unknown, Long.MAX_VALUE is returned}.
  - getByteBuffer
```
public final ByteBuffer getByteBuffer()
```
  - arrayLength
```
public int arrayLength()
```
    Description copied from class: Pointer
    
    Returns the length of this pointer's backing array that is used by this pointer.
    
    Specified by:
    
    arrayLength in class Pointer
    
    Returns:
    
    The length of the backing array used
  - arrayOffset
```
public int arrayOffset()
```
    Description copied from class: Pointer
    
    Returns the offset within this pointer's backing array of the first element.
    
    Specified by:
    
    arrayOffset in class Pointer
    
    Returns:
    
    The offset of the first element on the backing array
  - array
```
public Object array()
```
    Description copied from class: Pointer
    
    Returns the array that backs this pointer.
    
    Specified by:
    
    array in class Pointer
    
    Returns:
    
    The array that backs this pointer.
  - hasArray
```
public boolean hasArray()
```
    Description copied from class: Pointer
    
    Indicates whether this Pointer instance is backed by an array.
    
    Specified by:
    
    hasArray in class Pointer
    
    Returns:
    
    true if, and only if, this memory object is backed by an array
  - getByte
```
public byte getByte(long offset)
```
    Description copied from class: Pointer
    
    Reads an byte (8 bit) value at the given offset.
    
    Specified by:
    
    getByte in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    
    the byte value at the offset.
  - getShort
```
public short getShort(long offset)
```
    Description copied from class: Pointer
    
    Reads a short (16 bit) value at the given offset.
    
    Specified by:
    
    getShort in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    
    the short value at the offset.
  - getInt
```
public int getInt(long offset)
```
    Description copied from class: Pointer
    
    Reads an int (32 bit) value at the given offset.
    
    Specified by:
    
    getInt in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    
    the int value contained in the memory at the offset.
  - getLongLong
```
public long getLongLong(long offset)
```
    Description copied from class: Pointer
    
    Reads a long (64 bit) value at the given offset.
    
    Specified by:
    
    getLongLong in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    
    the long value at the offset.
  - getFloat
```
public float getFloat(long offset)
```
    Description copied from class: Pointer
    
    Reads a float (32 bit) value at the given offset.
    
    Specified by:
    
    getFloat in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    
    the float value at the offset.
  - getDouble
```
public double getDouble(long offset)
```
    Description copied from class: Pointer
    
    Reads a double (64 bit) value at the given offset.
    
    Specified by:
    
    getDouble in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    
    the double value at the offset.
  - putByte
```
public void putByte(long offset,
                    byte value)
```
    Description copied from class: Pointer
    
    Writes a byte (8 bit) value at the given offset.
    
    Specified by:
    
    putByte in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    
    value - the byte value to be written.
  - putShort
```
public void putShort(long offset,
                     short value)
```
    Description copied from class: Pointer
    
    Writes a short (16 bit) value at the given offset.
    
    Specified by:
    
    putShort in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    
    value - the short value to be written.
  - putInt
```
public void putInt(long offset,
                   int value)
```
    Description copied from class: Pointer
    
    Writes an int (32 bit) value at the given offset.
    
    Specified by:
    
    putInt in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    
    value - the int value to be written.
  - putLongLong
```
public void putLongLong(long offset,
                        long value)
```
    Description copied from class: Pointer
    
    Writes a long (64 bit) value at the given offset.
    
    Specified by:
    
    putLongLong in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    
    value - the long value to be written.
  - putFloat
```
public void putFloat(long offset,
                     float value)
```
    Description copied from class: Pointer
    
    Writes a float (32 bit, single precision) value at the given offset.
    
    Specified by:
    
    putFloat in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    
    value - the float value to be written.
  - putDouble
```
public void putDouble(long offset,
                      double value)
```
    Description copied from class: Pointer
    
    Writes a double (64 bit, double precision) value at the given offset.
    
    Specified by:
    
    putDouble in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the value will be written.
    
    value - the double value to be written.
  - getString
```
public String getString(long offset,
                        int size)
```
  - putString
```
public void putString(long offset,
                      String string)
```
  - get
```
public void get(long offset,
                byte[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple byte values. This method reads multiple byte values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the first value will be read.
    
    dst - the array into which values are to be stored.
    
    off - the start index in the dst array to begin storing the values.
    
    len - the number of values to be read.
  - get
```
public void get(long offset,
                short[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple short values. This method reads multiple short values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    
    dst - The array into which values are to be stored.
    
    off - the start index in the dst array to begin storing the values.
    
    len - the number of values to be read.
  - get
```
public void get(long offset,
                int[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple int values. This method reads multiple int values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    
    dst - The array into which values are to be stored.
    
    off - the start index in the dst array to begin storing the values.
    
    len - the number of values to be read.
  - get
```
public void get(long offset,
                long[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple long values. This method reads multiple long values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    
    dst - The array into which values are to be stored.
    
    off - the start index in the dst array to begin storing the values.
    
    len - the number of values to be read.
  - get
```
public void get(long offset,
                float[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple float values. This method reads multiple float values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    
    dst - The array into which values are to be stored.
    
    off - the start index in the dst array to begin storing the values.
    
    len - the number of values to be read.
  - get
```
public void get(long offset,
                double[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk get method for multiple double values. This method reads multiple double values from consecutive addresses, beginning at the given offset, and stores them in an array.
    
    Specified by:
    
    get in class Pointer
    
    Parameters:
    
    offset - The offset from the start of the memory this Pointer represents at which the first value will be read.
    
    dst - The array into which values are to be stored.
    
    off - the start index in the dst array to begin storing the values.
    
    len - the number of values to be read.
  - put
```
public void put(long offset,
                byte[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple byte values. This method writes multiple byte values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    
    dst - the array to get values from.
    
    off - the start index in the dst array to begin reading values.
    
    len - the number of values to be written.
  - put
```
public void put(long offset,
                short[] dst,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple short values. This method writes multiple short values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    
    dst - the array to get values from.
    
    off - the start index in the dst array to begin reading values.
    
    len - the number of values to be written.
  - put
```
public void put(long offset,
                int[] src,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple int values. This method writes multiple int values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    
    src - the array to get values from.
    
    off - the start index in the dst array to begin reading values.
    
    len - the number of values to be written.
  - put
```
public void put(long offset,
                long[] src,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple long values. This method writes multiple long values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    
    src - the array to get values from.
    
    off - the start index in the dst array to begin reading values.
    
    len - the number of values to be written.
  - put
```
public void put(long offset,
                float[] src,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple float values. This method writes multiple float values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    
    src - the array to get values from.
    
    off - the start index in the dst array to begin reading values.
    
    len - the number of values to be written.
  - put
```
public void put(long offset,
                double[] src,
                int off,
                int len)
```
    Description copied from class: Pointer
    
    Bulk put method for multiple double values. This method writes multiple double values to consecutive addresses, beginning at the given offset, from an array.
    
    Specified by:
    
    put in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the first value will be written.
    
    src - the array to get values from.
    
    off - the start index in the dst array to begin reading values.
    
    len - the number of values to be written.
  - getString
```
public String getString(long offset)
```
    Description copied from class: Pointer
    
    Reads an String value at the given offset.
    
    Specified by:
    
    getString in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the value will be read.
    
    Returns:
    
    the String value read from memory.
  - getString
```
public String getString(long offset,
                        int maxLength,
                        Charset cs)
```
    Description copied from class: Pointer
    
    Reads a String value at the given offset, using a specific Charset
    
    Specified by:
    
    getString in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the value will be read.
    
    maxLength - the maximum size of memory to search for a NUL byte.
    
    cs - the Charset to use to decode the string.
    
    Returns:
    
    the String value read from memory.
  - putString
```
public void putString(long offset,
                      String string,
                      int maxLength,
                      Charset cs)
```
    Description copied from class: Pointer
    
    Writes a String value at the given offset, using a specific Charset
    
    Specified by:
    
    putString in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory this Pointer represents at which the value will be written.
    
    string - the string to be written.
    
    maxLength - the maximum size of memory to use to store the string.
    
    cs - the Charset to use to decode the string.
  - indexOf
```
public int indexOf(long offset,
                   byte value,
                   int maxlen)
```
    Description copied from class: Pointer
    
    Returns the location of a byte value within the memory area represented by this Pointer.
    
    Specified by:
    
    indexOf in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory location this Pointer represents to begin searching.
    
    value - the byte value to locate.
    
    maxlen - the maximum number of bytes to search for the desired value.
    
    Returns:
    
    the offset from the start of the search area (i.e. relative to the offset parameter), or -1 if not found.
  - setMemory
```
public void setMemory(long offset,
                      long size,
                      byte value)
```
    Description copied from class: Pointer
    
    Sets the value of each byte in the memory area represented by this Pointer. to a specified value.
    
    Specified by:
    
    setMemory in class Pointer
    
    Parameters:
    
    offset - the offset from the start of the memory location this Pointer represents to begin writing to.
    
    size - the number of bytes to set to the value.
    
    value - the value to set each byte to.

Class AbstractBufferMemoryIO

Field Summary

Constructor Summary

Method Summary

Methods inherited from class jnr.ffi.provider.AbstractMemoryIO

Methods inherited from class jnr.ffi.Pointer

Methods inherited from class java.lang.Object

Field Detail

buffer

Constructor Detail

AbstractBufferMemoryIO

Method Detail

size

getByteBuffer

arrayLength

arrayOffset

array

hasArray

getByte

getShort

getInt

getLongLong

getFloat

getDouble

putByte

putShort

putInt

putLongLong

putFloat

putDouble

getString

putString

get

get

get

get

get

get

put

put

put

put

put

put

getString

getString

putString

indexOf

setMemory