/* GIO - GLib Input, Output and Streaming Library

 *

 * Copyright © 2008 Christian Kellner, Samuel Cormier-Iijima

 *           © 2009 codethink

 *

 * SPDX-License-Identifier: LGPL-2.1-or-later

 *

 * This library 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 2.1 of the License, or (at your option) any later version.

 *

 * This library 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 library; if not, see <http://www.gnu.org/licenses/>.

 *

 * Authors: Christian Kellner <gicmo@gnome.org>

 *          Samuel Cormier-Iijima <sciyoshi@gmail.com>

 *          Ryan Lortie <desrt@desrt.ca>

 */

#include "config.h"

#include "gsocketinputstream.h"

#include "glibintl.h"

#include "gcancellable.h"

#include "gpollableinputstream.h"

#include "gioerror.h"

#include "gfiledescriptorbased.h"

struct _GSocketInputStreamPrivate

{

  GSocket *socket;

  /* pending operation metadata */

  gpointer buffer;

  gsize count;

};

static void g_socket_input_stream_pollable_iface_init (GPollableInputStreamInterface *iface);

#ifdef G_OS_UNIX

static void g_socket_input_stream_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface);

#endif

#define g_socket_input_stream_get_type _g_socket_input_stream_get_type

#ifdef G_OS_UNIX

G_DEFINE_TYPE_WITH_CODE (GSocketInputStream, g_socket_input_stream, G_TYPE_INPUT_STREAM,

                         G_ADD_PRIVATE (GSocketInputStream)

       G_IMPLEMENT_INTERFACE (G_TYPE_POLLABLE_INPUT_STREAM, g_socket_input_stream_pollable_iface_init)

       G_IMPLEMENT_INTERFACE (G_TYPE_FILE_DESCRIPTOR_BASED, g_socket_input_stream_file_descriptor_based_iface_init)

       )

#else

G_DEFINE_TYPE_WITH_CODE (GSocketInputStream, g_socket_input_stream, G_TYPE_INPUT_STREAM,

                         G_ADD_PRIVATE (GSocketInputStream)

       G_IMPLEMENT_INTERFACE (G_TYPE_POLLABLE_INPUT_STREAM, g_socket_input_stream_pollable_iface_init)

       )

#endif

enum

{

  PROP_0,

  PROP_SOCKET

};

static void

g_socket_input_stream_get_property (GObject    *object,

                                    guint       prop_id,

                                    GValue     *value,

                                    GParamSpec *pspec)

{

  GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);

  switch (prop_id)

    {

      case PROP_SOCKET:

        g_value_set_object (value, stream->priv->socket);

        break;

      default:

        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

    }

}

static void

g_socket_input_stream_set_property (GObject      *object,

                                    guint         prop_id,

                                    const GValue *value,

                                    GParamSpec   *pspec)

{

  GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);

  switch (prop_id)

    {

      case PROP_SOCKET:

        stream->priv->socket = g_value_dup_object (value);

        break;

      default:

        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

    }

}

static void

g_socket_input_stream_finalize (GObject *object)

{

  GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);

  if (stream->priv->socket)

    g_object_unref (stream->priv->socket);

  G_OBJECT_CLASS (g_socket_input_stream_parent_class)->finalize (object);

}

static gssize

g_socket_input_stream_read (GInputStream  *stream,

                            void          *buffer,

                            gsize          count,

                            GCancellable  *cancellable,

                            GError       **error)

{

  GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (stream);

  return g_socket_receive_with_blocking (input_stream->priv->socket,

           buffer, count, TRUE,

           cancellable, error);

}

static gboolean

g_socket_input_stream_pollable_is_readable (GPollableInputStream *pollable)

{

  GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (pollable);

  return g_socket_condition_check (input_stream->priv->socket, G_IO_IN);

}

static GSource *

g_socket_input_stream_pollable_create_source (GPollableInputStream *pollable,

                GCancellable         *cancellable)

{

  GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (pollable);

  GSource *socket_source, *pollable_source;

  pollable_source = g_pollable_source_new (G_OBJECT (input_stream));

  socket_source = g_socket_create_source (input_stream->priv->socket,

            G_IO_IN, cancellable);

  g_source_set_dummy_callback (socket_source);

  g_source_add_child_source (pollable_source, socket_source);

  g_source_unref (socket_source);

  return pollable_source;

}

static gssize

g_socket_input_stream_pollable_read_nonblocking (GPollableInputStream  *pollable,

             void                  *buffer,

             gsize                  size,

             GError               **error)

{

  GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (pollable);

  return g_socket_receive_with_blocking (input_stream->priv->socket,

           buffer, size, FALSE,

           NULL, error);

}

#ifdef G_OS_UNIX

static int

g_socket_input_stream_get_fd (GFileDescriptorBased *fd_based)

{

  GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (fd_based);

  return g_socket_get_fd (input_stream->priv->socket);

}

#endif

static void

g_socket_input_stream_class_init (GSocketInputStreamClass *klass)

{

  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  GInputStreamClass *ginputstream_class = G_INPUT_STREAM_CLASS (klass);

  gobject_class->finalize = g_socket_input_stream_finalize;

  gobject_class->get_property = g_socket_input_stream_get_property;

  gobject_class->set_property = g_socket_input_stream_set_property;

  ginputstream_class->read_fn = g_socket_input_stream_read;

  g_object_class_install_property (gobject_class, PROP_SOCKET,

           g_param_spec_object ("socket",

              P_("socket"),

              P_("The socket that this stream wraps"),

              G_TYPE_SOCKET, G_PARAM_CONSTRUCT_ONLY |

              G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

}

#ifdef G_OS_UNIX

static void

g_socket_input_stream_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface)

{

  iface->get_fd = g_socket_input_stream_get_fd;

}

#endif

static void

g_socket_input_stream_pollable_iface_init (GPollableInputStreamInterface *iface)

{

  iface->is_readable = g_socket_input_stream_pollable_is_readable;

  iface->create_source = g_socket_input_stream_pollable_create_source;

  iface->read_nonblocking = g_socket_input_stream_pollable_read_nonblocking;

}

static void

g_socket_input_stream_init (GSocketInputStream *stream)

{

  stream->priv = g_socket_input_stream_get_instance_private (stream);

}

GSocketInputStream *

_g_socket_input_stream_new (GSocket *socket)

{

  return g_object_new (G_TYPE_SOCKET_INPUT_STREAM, "socket", socket, NULL);

}