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/* A byte source/sink .. it can be a pipe, file descriptor, memory area,
* socket, node.js stream, etc.
*
* J.Cupitt, 19/6/14
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define VIPS_DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /*HAVE_UNISTD_H*/
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include <vips/debug.h>
/**
* SECTION: connection
* @short_description: a source/sink of bytes, perhaps a network socket
* @stability: Stable
* @see_also: <link linkend="libvips-foreign">foreign</link>
* @include: vips/vips.h
* @title: VipsConnection
*
* A #VipsConnection is a source or sink of bytes for something like jpeg
* loading, see for example vips_jpegload_source().
*
* It can be connected to a network socket, for example, or perhaps
* a node.js stream, or to an area of memory.
*
* Subclass to add other input sources. Use #VipsSourceCustom and
* #VipsTargetCustom to make a source or target with action signals for
* ::read, ::write and ::seek.
*/
/**
* VipsConnection:
*
* A #VipsConnection is a source or sink of bytes for something like jpeg
* loading. It can be connected to a network socket, for example.
*/
G_DEFINE_ABSTRACT_TYPE( VipsConnection, vips_connection, VIPS_TYPE_OBJECT );
static void
vips_connection_finalize( GObject *gobject )
{
VipsConnection *connection = (VipsConnection *) gobject;
#ifdef VIPS_DEBUG
VIPS_DEBUG_MSG( "vips_connection_finalize: " );
vips_object_print_name( VIPS_OBJECT( gobject ) );
VIPS_DEBUG_MSG( "\n" );
#endif /*VIPS_DEBUG*/
if( connection->tracked_descriptor >= 0 ) {
VIPS_DEBUG_MSG( " tracked_close()\n" );
vips_tracked_close( connection->tracked_descriptor );
connection->tracked_descriptor = -1;
connection->descriptor = -1;
}
if( connection->close_descriptor >= 0 ) {
VIPS_DEBUG_MSG( " close()\n" );
close( connection->close_descriptor );
connection->close_descriptor = -1;
connection->descriptor = -1;
}
VIPS_FREE( connection->filename );
G_OBJECT_CLASS( vips_connection_parent_class )->finalize( gobject );
}
static void
vips_connection_class_init( VipsConnectionClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
gobject_class->finalize = vips_connection_finalize;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
VIPS_ARG_INT( class, "descriptor", 1,
_( "Descriptor" ),
_( "File descriptor for read or write" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsConnection, descriptor ),
-1, 1000000000, 0 );
VIPS_ARG_STRING( class, "filename", 2,
_( "Filename" ),
_( "Name of file to open" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsConnection, filename ),
NULL );
}
static void
vips_connection_init( VipsConnection *connection )
{
connection->descriptor = -1;
connection->tracked_descriptor = -1;
connection->close_descriptor = -1;
}
/**
* vips_connection_filename:
* @connection: connection to operate on
*
* Returns: any filename associated with this connection, or NULL.
*/
const char *
vips_connection_filename( VipsConnection *connection )
{
return( connection->filename );
}
/**
* vips_connection_nick:
* @connection: connection to operate on
*
* Returns: a string describing this connection which could be displayed to a
* user.
*/
const char *
vips_connection_nick( VipsConnection *connection )
{
return( connection->filename ?
connection->filename :
VIPS_OBJECT( connection )->nickname );
}
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