MemoryOutputStream

Object Hierarchy:

Description:

public static int main (string[] args) {
	try {
		MemoryOutputStream os = new MemoryOutputStream (null, GLib.realloc, GLib.free);

		// Write data to memory:
		DataOutputStream dos = new DataOutputStream (os);
		dos.put_int16 (int16.MIN);
		dos.put_int32 (int32.MIN);
		dos.put_int64 (int64.MIN);
		dos.close ();

		// Read data:
		uint8[] data = os.steal_data ();
		data.length = (int) os.get_data_size ();

		MemoryInputStream @is = new MemoryInputStream.from_data (data, GLib.free);
		DataInputStream dis = new DataInputStream (@is);
		print ("%d (Expected: %d)\n", dis.read_int16 (), int16.MIN);
		print ("%d (Expected: %d)\n", dis.read_int32 (), int32.MIN);
		print ("%"+int64.FORMAT+" (Expected: %"+int64.FORMAT+")\n", dis.read_int64 (), int64.MIN);
	} catch (IOError e) {
		print ("IOError %s\n", e.message);
	}
	return 0;
}

valac --pkg gio-2.0 GLib.MemoryOutputStream.vala

Content:

Properties:

• public void* data { get; construct; }
  Pointer to buffer where data will be written.
• public ulong data_size { get; }
  Size of data written to the buffer.
• public DestroyNotify? destroy_function { get; construct; }
  Function called with the buffer as argument when the stream is destroyed.
• public ReallocFunc? realloc_function { get; construct; }
  Function with realloc semantics called to enlarge the buffer.
• public ulong size { get; construct; }
  Current size of the data buffer.

Static methods:

• public static MemoryOutputStream with_data (uint8[] data)
• public static MemoryOutputStream with_owned_data (owned uint8[] data)

Creation methods:

• public MemoryOutputStream (owned uint8[]? data, ReallocFunc? realloc_function = g_realloc, DestroyNotify? destroy_function = g_free)
• public MemoryOutputStream.from_data (void* data, size_t size, ReallocFunc? realloc_function = null, DestroyNotify? destroy_function = null)
  Creates a new MemoryOutputStream.
• public MemoryOutputStream.resizable ()
  Creates a new MemoryOutputStream, using g_realloc and g_free for memory allocation.

Methods:

• public unowned uint8[] get_data ()
  Gets any loaded data from the this.
• public size_t get_data_size ()
  Returns the number of bytes from the start up to including the last byte written in the stream that has not been truncated away.
• public size_t get_size ()
  Gets the size of the currently allocated data area (available from get_data).
• public Bytes steal_as_bytes ()
  Returns data from the this as a Bytes.
• public uint8[] steal_data ()
  Gets any loaded data from the this.

Inherited Members: