GLib.ZlibCompressor – gio-2.0 – Vala Binding Reference

Description:

[ CCode ( type_id = "g_zlib_compressor_get_type ()" ) ]
public class ZlibCompressor : Object, Converter

ZlibCompressor is an implementation of Converter that compresses data using zlib.

Example: ZLib-Compression:

private const ZlibCompressorFormat FORMAT = ZlibCompressorFormat.GZIP;

private void convert (File source, File dest, Converter converter) throws Error {
	var src_stream = source.read ();
	var dst_stream = dest.replace (null, false, 0);
	var conv_stream = new ConverterOutputStream (dst_stream, converter);

	// 'splice' pumps all data from an InputStream to an OutputStream
	conv_stream.splice (src_stream, 0);
}

public int main (string[] args) {
	if (args.length < 2) {
		print ("Usage: %s FILE\n", args[0]);
		return 0;
	}

	var infile = File.new_for_commandline_arg (args[1]);
	if (!infile.query_exists ()) {
		stderr.printf ("File '%s' does not exist.\n", args[1]);
		return 1;
	}

	var zipfile = File.new_for_commandline_arg (args[1] + ".gz");
	var outfile = File.new_for_commandline_arg (args[1] + "_out");

	try {
		convert (infile, zipfile, new ZlibCompressor (FORMAT));
		convert (zipfile, outfile, new ZlibDecompressor (FORMAT));
	} catch (Error e) {
		stderr.printf ("%s\n", e.message);
		return 1;
	}

	return 0;
}

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

Example: ZLib-Compression:

private const ZlibCompressorFormat FORMAT = ZlibCompressorFormat.GZIP;

private void convert (File source, File dest, Converter converter) throws Error {
	var src_stream = source.read ();
	var dst_stream = dest.replace (null, false, 0);
	var conv_stream = new ConverterOutputStream (dst_stream, converter);

	// 'splice' pumps all data from an InputStream to an OutputStream
	conv_stream.splice (src_stream, 0);
}

public int main (string[] args) {
	if (args.length < 2) {
		print ("Usage: %s FILE\n", args[0]);
		return 0;
	}

	var infile = File.new_for_commandline_arg (args[1]);
	if (!infile.query_exists ()) {
		stderr.printf ("File '%s' does not exist.\n", args[1]);
		return 1;
	}

	var zipfile = File.new_for_commandline_arg (args[1] + ".gz");
	var outfile = File.new_for_commandline_arg (args[1] + "_out");

	try {
		convert (infile, zipfile, new ZlibCompressor (FORMAT));
		convert (zipfile, outfile, new ZlibDecompressor (FORMAT));
	} catch (Error e) {
		stderr.printf ("%s\n", e.message);
		return 1;
	}

	return 0;
}

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

Namespace: GLib

Package: gio-2.0

Content:

Properties:

public FileInfo file_info { get; set; }

If set to a non-null FileInfo object, and format is g_zlib_compressor_format_gzip, the compressor will write the file name and modification time from the file info to the GZIP header.

public ZlibCompressorFormat format { get; construct; }

public int level { get; construct; }

Creation methods:

public ZlibCompressor (ZlibCompressorFormat format, int level = -1)

Creates a new ZlibCompressor.

Methods:

public unowned FileInfo? get_file_info ()

Returns the file_info property.

public void set_file_info (FileInfo? file_info)

Sets file_info in this.

Inherited Members:

All known members inherited from class GLib.Object

@get
@new
@ref
@set
add_toggle_ref
add_weak_pointer
bind_property
connect
constructed
disconnect
dispose
dup_data
dup_qdata
force_floating
freeze_notify
get_class
get_data

get_property
get_qdata
get_type
getv
interface_find_property
interface_install_property
interface_list_properties
is_floating
new_valist
new_with_properties
newv
notify
notify_property
ref_count
ref_sink
remove_toggle_ref
remove_weak_pointer

replace_data
replace_qdata
set_data
set_data_full
set_property
set_qdata
set_qdata_full
set_valist
setv
steal_data
steal_qdata
thaw_notify
unref
watch_closure
weak_ref
weak_unref

All known members inherited from interface GLib.Converter

convert

reset