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glib/gio/gdataoutputstream.c
Daniel Mustieles 078dbda148 Updated FSF's address
2014-01-31 14:31:55 +01:00

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* 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 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/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include <string.h>
#include "gdataoutputstream.h"
#include "gseekable.h"
#include "gioenumtypes.h"
#include "gioerror.h"
#include "glibintl.h"
/**
* SECTION:gdataoutputstream
* @short_description: Data Output Stream
* @include: gio/gio.h
* @see_also: #GOutputStream
*
* Data output stream implements #GOutputStream and includes functions for
* writing data directly to an output stream.
*
**/
struct _GDataOutputStreamPrivate {
GDataStreamByteOrder byte_order;
};
enum {
PROP_0,
PROP_BYTE_ORDER
};
static void g_data_output_stream_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void g_data_output_stream_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void g_data_output_stream_seekable_iface_init (GSeekableIface *iface);
static goffset g_data_output_stream_tell (GSeekable *seekable);
static gboolean g_data_output_stream_can_seek (GSeekable *seekable);
static gboolean g_data_output_stream_seek (GSeekable *seekable,
goffset offset,
GSeekType type,
GCancellable *cancellable,
GError **error);
static gboolean g_data_output_stream_can_truncate (GSeekable *seekable);
static gboolean g_data_output_stream_truncate (GSeekable *seekable,
goffset offset,
GCancellable *cancellable,
GError **error);
G_DEFINE_TYPE_WITH_CODE (GDataOutputStream,
g_data_output_stream,
G_TYPE_FILTER_OUTPUT_STREAM,
G_ADD_PRIVATE (GDataOutputStream)
G_IMPLEMENT_INTERFACE (G_TYPE_SEEKABLE,
g_data_output_stream_seekable_iface_init))
static void
g_data_output_stream_class_init (GDataOutputStreamClass *klass)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (klass);
object_class->get_property = g_data_output_stream_get_property;
object_class->set_property = g_data_output_stream_set_property;
/**
* GDataOutputStream:byte-order:
*
* Determines the byte ordering that is used when writing
* multi-byte entities (such as integers) to the stream.
*/
g_object_class_install_property (object_class,
PROP_BYTE_ORDER,
g_param_spec_enum ("byte-order",
P_("Byte order"),
P_("The byte order"),
G_TYPE_DATA_STREAM_BYTE_ORDER,
G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN,
G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_BLURB));
}
static void
g_data_output_stream_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GDataOutputStream *dstream;
dstream = G_DATA_OUTPUT_STREAM (object);
switch (prop_id)
{
case PROP_BYTE_ORDER:
g_data_output_stream_set_byte_order (dstream, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_data_output_stream_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GDataOutputStreamPrivate *priv;
GDataOutputStream *dstream;
dstream = G_DATA_OUTPUT_STREAM (object);
priv = dstream->priv;
switch (prop_id)
{
case PROP_BYTE_ORDER:
g_value_set_enum (value, priv->byte_order);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_data_output_stream_init (GDataOutputStream *stream)
{
stream->priv = g_data_output_stream_get_instance_private (stream);
stream->priv->byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
}
static void
g_data_output_stream_seekable_iface_init (GSeekableIface *iface)
{
iface->tell = g_data_output_stream_tell;
iface->can_seek = g_data_output_stream_can_seek;
iface->seek = g_data_output_stream_seek;
iface->can_truncate = g_data_output_stream_can_truncate;
iface->truncate_fn = g_data_output_stream_truncate;
}
/**
* g_data_output_stream_new:
* @base_stream: a #GOutputStream.
*
* Creates a new data output stream for @base_stream.
*
* Returns: #GDataOutputStream.
**/
GDataOutputStream *
g_data_output_stream_new (GOutputStream *base_stream)
{
GDataOutputStream *stream;
g_return_val_if_fail (G_IS_OUTPUT_STREAM (base_stream), NULL);
stream = g_object_new (G_TYPE_DATA_OUTPUT_STREAM,
"base-stream", base_stream,
NULL);
return stream;
}
/**
* g_data_output_stream_set_byte_order:
* @stream: a #GDataOutputStream.
* @order: a %GDataStreamByteOrder.
*
* Sets the byte order of the data output stream to @order.
**/
void
g_data_output_stream_set_byte_order (GDataOutputStream *stream,
GDataStreamByteOrder order)
{
GDataOutputStreamPrivate *priv;
g_return_if_fail (G_IS_DATA_OUTPUT_STREAM (stream));
priv = stream->priv;
if (priv->byte_order != order)
{
priv->byte_order = order;
g_object_notify (G_OBJECT (stream), "byte-order");
}
}
/**
* g_data_output_stream_get_byte_order:
* @stream: a #GDataOutputStream.
*
* Gets the byte order for the stream.
*
* Returns: the #GDataStreamByteOrder for the @stream.
**/
GDataStreamByteOrder
g_data_output_stream_get_byte_order (GDataOutputStream *stream)
{
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN);
return stream->priv->byte_order;
}
/**
* g_data_output_stream_put_byte:
* @stream: a #GDataOutputStream.
* @data: a #guchar.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts a byte into the output stream.
*
* Returns: %TRUE if @data was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_byte (GDataOutputStream *stream,
guchar data,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
&data, 1,
&bytes_written,
cancellable, error);
}
/**
* g_data_output_stream_put_int16:
* @stream: a #GDataOutputStream.
* @data: a #gint16.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts a signed 16-bit integer into the output stream.
*
* Returns: %TRUE if @data was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_int16 (GDataOutputStream *stream,
gint16 data,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
switch (stream->priv->byte_order)
{
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
data = GINT16_TO_BE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
data = GINT16_TO_LE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
default:
break;
}
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
&data, 2,
&bytes_written,
cancellable, error);
}
/**
* g_data_output_stream_put_uint16:
* @stream: a #GDataOutputStream.
* @data: a #guint16.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts an unsigned 16-bit integer into the output stream.
*
* Returns: %TRUE if @data was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_uint16 (GDataOutputStream *stream,
guint16 data,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
switch (stream->priv->byte_order)
{
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
data = GUINT16_TO_BE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
data = GUINT16_TO_LE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
default:
break;
}
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
&data, 2,
&bytes_written,
cancellable, error);
}
/**
* g_data_output_stream_put_int32:
* @stream: a #GDataOutputStream.
* @data: a #gint32.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts a signed 32-bit integer into the output stream.
*
* Returns: %TRUE if @data was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_int32 (GDataOutputStream *stream,
gint32 data,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
switch (stream->priv->byte_order)
{
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
data = GINT32_TO_BE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
data = GINT32_TO_LE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
default:
break;
}
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
&data, 4,
&bytes_written,
cancellable, error);
}
/**
* g_data_output_stream_put_uint32:
* @stream: a #GDataOutputStream.
* @data: a #guint32.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts an unsigned 32-bit integer into the stream.
*
* Returns: %TRUE if @data was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_uint32 (GDataOutputStream *stream,
guint32 data,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
switch (stream->priv->byte_order)
{
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
data = GUINT32_TO_BE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
data = GUINT32_TO_LE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
default:
break;
}
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
&data, 4,
&bytes_written,
cancellable, error);
}
/**
* g_data_output_stream_put_int64:
* @stream: a #GDataOutputStream.
* @data: a #gint64.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts a signed 64-bit integer into the stream.
*
* Returns: %TRUE if @data was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_int64 (GDataOutputStream *stream,
gint64 data,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
switch (stream->priv->byte_order)
{
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
data = GINT64_TO_BE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
data = GINT64_TO_LE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
default:
break;
}
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
&data, 8,
&bytes_written,
cancellable, error);
}
/**
* g_data_output_stream_put_uint64:
* @stream: a #GDataOutputStream.
* @data: a #guint64.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts an unsigned 64-bit integer into the stream.
*
* Returns: %TRUE if @data was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_uint64 (GDataOutputStream *stream,
guint64 data,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
switch (stream->priv->byte_order)
{
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
data = GUINT64_TO_BE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
data = GUINT64_TO_LE (data);
break;
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
default:
break;
}
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
&data, 8,
&bytes_written,
cancellable, error);
}
/**
* g_data_output_stream_put_string:
* @stream: a #GDataOutputStream.
* @str: a string.
* @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
* @error: a #GError, %NULL to ignore.
*
* Puts a string into the output stream.
*
* Returns: %TRUE if @string was successfully added to the @stream.
**/
gboolean
g_data_output_stream_put_string (GDataOutputStream *stream,
const char *str,
GCancellable *cancellable,
GError **error)
{
gsize bytes_written;
g_return_val_if_fail (G_IS_DATA_OUTPUT_STREAM (stream), FALSE);
g_return_val_if_fail (str != NULL, FALSE);
return g_output_stream_write_all (G_OUTPUT_STREAM (stream),
str, strlen (str),
&bytes_written,
cancellable, error);
}
static goffset
g_data_output_stream_tell (GSeekable *seekable)
{
GOutputStream *base_stream;
GSeekable *base_stream_seekable;
base_stream = G_FILTER_OUTPUT_STREAM (seekable)->base_stream;
if (!G_IS_SEEKABLE (base_stream))
return 0;
base_stream_seekable = G_SEEKABLE (base_stream);
return g_seekable_tell (base_stream_seekable);
}
static gboolean
g_data_output_stream_can_seek (GSeekable *seekable)
{
GOutputStream *base_stream;
base_stream = G_FILTER_OUTPUT_STREAM (seekable)->base_stream;
return G_IS_SEEKABLE (base_stream) && g_seekable_can_seek (G_SEEKABLE (base_stream));
}
static gboolean
g_data_output_stream_seek (GSeekable *seekable,
goffset offset,
GSeekType type,
GCancellable *cancellable,
GError **error)
{
GOutputStream *base_stream;
GSeekable *base_stream_seekable;
base_stream = G_FILTER_OUTPUT_STREAM (seekable)->base_stream;
if (!G_IS_SEEKABLE (base_stream))
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Seek not supported on base stream"));
return FALSE;
}
base_stream_seekable = G_SEEKABLE (base_stream);
return g_seekable_seek (base_stream_seekable, offset, type, cancellable, error);
}
static gboolean
g_data_output_stream_can_truncate (GSeekable *seekable)
{
GOutputStream *base_stream;
base_stream = G_FILTER_OUTPUT_STREAM (seekable)->base_stream;
return G_IS_SEEKABLE (base_stream) && g_seekable_can_truncate (G_SEEKABLE (base_stream));
}
static gboolean
g_data_output_stream_truncate (GSeekable *seekable,
goffset offset,
GCancellable *cancellable,
GError **error)
{
GOutputStream *base_stream;
GSeekable *base_stream_seekable;
base_stream = G_FILTER_OUTPUT_STREAM (seekable)->base_stream;
if (!G_IS_SEEKABLE (base_stream))
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("Truncate not supported on base stream"));
return FALSE;
}
base_stream_seekable = G_SEEKABLE (base_stream);
return g_seekable_truncate (base_stream_seekable, offset, cancellable, error);
}
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