Returns an empty data object.

Returns an autoreleased data object containing data copied from bytes and with the specified length. Invokes -initWithBytes:length:

Returns an autoreleased data object encapsulating the data at bytes and with the specified length. Invokes -initWithBytesNoCopy:length:freeWhenDone: with YES

Returns an autoreleased data object encapsulating the data at bytes and with the specified length. Invokes -initWithBytesNoCopy:length:freeWhenDone:

Returns a data object encapsulating the contents of the specified file. Invokes -initWithContentsOfFile:

Returns a data object encapsulating the contents of the specified file mapped directly into memory. Invokes -initWithContentsOfMappedFile:

Retrieves the information at the specified url and returns an NSData instance encapsulating it.

Returns an autoreleased instance initialised by copying the contents of data.

Description forthcoming.

Description forthcoming.

Returns a pointer to the data encapsulated by the receiver.

Returns a short description of this object.

Copies data from buffer starting from cursor. Deprecated. Use [-getBytes:] and related methods instead.

Copies data from buffer starting from cursor. Deprecated. Use [-getBytes:] and related methods instead.

Description forthcoming.

Retrieve an int from this data, which is assumed to be in network (big-endian) byte order. Cursor refers to byte position.

Retrieve an int from this data, which is assumed to be in network (big-endian) byte order. Index refers to byte position.

Retrieve ints from intBuffer, which is assumed to be in network (big-endian) byte order. Count refers to number of ints, but index refers to byte position.

Retrieve ints from intBuffer, which is assumed to be in network (big-endian) byte order. Count refers to number of ints, but index refers to byte position.

Copies the contents of the memory encapsulated by the receiver into the specified buffer. The buffer must be large enough to contain -length bytes of data... if it isn't then a crash is likely to occur.
Invokes -getBytes:range: with the range set to the whole of the receiver.

Copies length bytes of data from the memory encapsulated by the receiver into the specified buffer. The buffer must be large enough to contain length bytes of data... if it isn't then a crash is likely to occur.
If length is greater than the size of the receiver, only the available bytes are copied.

Copies data from the memory encapsulated by the receiver (in the range specified by aRange) into the specified buffer.
The buffer must be large enough to contain the data... if it isn't then a crash is likely to occur.
If aRange specifies a range which does not entirely lie within the receiver, an exception is raised.

Description forthcoming.

Description forthcoming.

Makes a copy of bufferSize bytes of data at aBuffer, and passes it to -initWithBytesNoCopy:length:freeWhenDone: with a YES argument in order to initialise the receiver. Returns the result.

Invokes -initWithBytesNoCopy:length:freeWhenDone: with the last argument set to YES. Returns the resulting initialised data object (which may not be the receiver).

Initialises the receiver.
The value of aBuffer is a pointer to something to be stored.
The value of bufferSize is the number of bytes to use.
The value of shouldFree specifies whether the receiver should attempt to free the memory pointer to by aBuffer when the receiver is deallocated ... ie. it says whether the receiver owns the memory. Supplying the wrong value here will lead to memory leaks or crashes.

Initialises the receiver with the contents of the specified file.
Returns the resulting object.
Returns nil if the file does not exist or can not be read for some reason.

Initialize with data pointing to contents of file at path. Bytes are only "swapped in" as needed. File should not be moved or deleted for the life of this object.

Initialize with data pointing to contents of URL, which will be retrieved immediately in a blocking manner.

Initializes by copying data's bytes into a new buffer.

Returns a boolean value indicating if the receiver and other contain identical data (using a byte by byte comparison). Assumes that the other object is an NSData instance... may raise an exception if it isn't.

Returns the number of bytes of data encapsulated by the receiver.

Returns an NSData instance encapsulating the memory from the receiver specified by the range aRange.
If aRange specifies a range which does not entirely lie within the receiver, an exception is raised.

Writes a copy of the data encapsulated by the receiver to a file at path. If the useAuxiliaryFile flag is YES, this writes to a temporary file and then renames that to the file at path, thus ensuring that path exists and does not contain partially written data at any point.

On success returns YES, on failure returns NO.

Writes a copy of the data encapsulated by the receiver to a file at path. If the NSDataWritingAtomic option is set, this writes to a temporary file and then renames that to the file at path, thus ensuring that path exists and does not contain partially written data at any point.

On success returns YES, on failure returns NO.

Writes a copy of the contents of the receiver to the specified URL.

Writes a copy of the contents of the receiver to the specified URL.

New instance with buffer of given numBytes with length of valid data set to zero. Note that capacity will be automatically increased as necessary.

New instance with buffer of capacity and valid data size equal to given length in bytes. The buffer contents are set to zero. The length of valid data is set to zero. Note that buffer will be automatically increased as necessary.

Appends bufferSize bytes from aBuffer to data, increasing capacity if necessary.

Copies and appends data from other to data, increasing capacity if necessary.

Increases buffer length by given number of bytes, filling the new space with zeros.

Initialize with buffer capable of holding size bytes. The length of valid data is initially set to zero.

Initialize with buffer of capacity equal to length, and with the length of valid data set to length. Data is set to zero.

Returns a pointer to the data storage of the receiver.
Modifications to the memory pointed to by this pointer will change the contents of the object. It is important that your code should not try to modify the memory beyond the number of bytes given by the -length method.

NB. if the object is released, or any method that changes its size or content is called, then the pointer previously returned by this method may cease to be valid.

This is a 'primitive' method... you need to implement it if you write a subclass of NSMutableData.

Replaces the bytes of data in the specified range with a copy of the new bytes supplied.
If the location of the range specified lies beyond the end of the data ( [self length] < range.location) then a range exception is raised.
Otherwise, if the range specified extends beyond the end of the data, then the size of the data is increased to accommodate the new bytes.

Replace the content of the receiver which lies in aRange with the specified length of data from the buffer pointed to by bytes.
The size of the receiver is adjusted to allow for the change.

Set bytes in aRange to 0.

Does not act as the name suggests. Instead, serializes length itself as an int into buffer.

Description forthcoming.

Serialize an int into this object's data buffer, swapping it to network (big-endian) byte order first.

Serialize an int into this object's data buffer at index (replacing anything there currently), swapping it to network (big-endian) byte order first.

Serialize one or more ints into this object's data buffer, swapping them to network (big-endian) byte order first.

Serialize one or more ints into this object's data buffer at index (replacing anything there currently), swapping them to network (big-endian) byte order first.

Replaces contents of buffer with contents of data's buffer, increasing or shrinking capacity to match.

Sets the length of the NSMutableData object. If the length is increased, the newly allocated data area is filled with zero bytes.

This is a 'primitive' method... you need to implement it if you write a subclass of NSMutableData.

New instance with given bytes in shared memory.

New instance with given shared memory ID.

Description forthcoming.

Returns current capacity of data buffer.

Description forthcoming.

Description forthcoming.

Sets current capacity of data buffer. Unlike -setLength: , this will shrink the buffer if requested.

Return shared memory ID, if using one, else -1.