Object Hierarchy:

GLib.FileInputStream GLib.FileInputStream GLib.FileInputStream GLib.InputStream GLib.InputStream GLib.InputStream->GLib.FileInputStream GLib.Object GLib.Object GLib.Object->GLib.InputStream GLib.Seekable GLib.Seekable GLib.Seekable->GLib.FileInputStream


[ CCode ( type_id = "g_file_input_stream_get_type ()" ) ]
public class FileInputStream : InputStream, Seekable

`GFileInputStream` provides input streams that take their content from a file.

`GFileInputStream` implements [iface@Gio.Seekable], which allows the input stream to jump to arbitrary positions in the file, provided the filesystem of the file allows it. To find the position of a file input stream, use [method@Gio.Seekable.tell]. To find out if a file input stream supports seeking, use [vfunc@Gio.Seekable.can_seek]. To position a file input stream, use [].

Example: FileIOStream:

public static int main (string[] args) {
try {
// Create a file that can only be accessed by the current user:
File file = File.new_for_path ("my-test.bin");
FileIOStream ios = file.create_readwrite (FileCreateFlags.PRIVATE);

// Write data:

size_t bytes_written;
FileOutputStream os = ios.output_stream as FileOutputStream;
os.write_all ("My 1. line\n".data, out bytes_written);
os.write_all ("My 2. line\n".data, out bytes_written);

DataOutputStream dos = new DataOutputStream (os);
dos.put_string ("My 3. line\n");
dos.put_int16 (10);

// Set the file pointer to the beginning of the stream:
assert (ios.can_seek ()); (0, SeekType.SET);

// Read n bytes:

FileInputStream @is = ios.input_stream as FileInputStream;

// Output: ``M``
uint8 buffer[1];
size_t size = (buffer);
stdout.write (buffer, size);

// Output: ``y 1. line``
DataInputStream dis = new DataInputStream (@is);
string str = dis.read_line ();
print ("%s\n", str);

// Output: ``My 2. line``
str = dis.read_line ();
print ("%s\n", str);

// Output: ``My 3. line``
str = dis.read_line ();
print ("%s\n", str);

// Output: ``10``
int16 i = dis.read_int16 ();
print ("%d\n", i);
} catch (Error e) {
print ("Error: %s\n", e.message);

return 0;

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

Namespace: GLib
Package: gio-2.0


Creation methods:


Inherited Members:

All known members inherited from interface GLib.Seekable