|
Packit |
ae235b |
/* GIO - GLib Input, Output and Streaming Library
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Copyright (C) 2006-2007 Red Hat, Inc.
|
|
Packit |
ae235b |
* Copyright (C) 2007 Jürg Billeter
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* This library is free software; you can redistribute it and/or
|
|
Packit |
ae235b |
* modify it under the terms of the GNU Lesser General Public
|
|
Packit |
ae235b |
* License as published by the Free Software Foundation; either
|
|
Packit |
ae235b |
* version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* This library is distributed in the hope that it will be useful,
|
|
Packit |
ae235b |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
ae235b |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
ae235b |
* Lesser General Public License for more details.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* You should have received a copy of the GNU Lesser General
|
|
Packit |
ae235b |
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Author: Christian Kellner <gicmo@gnome.org>
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
#include "config.h"
|
|
Packit |
ae235b |
#include "gbufferedinputstream.h"
|
|
Packit |
ae235b |
#include "ginputstream.h"
|
|
Packit |
ae235b |
#include "gcancellable.h"
|
|
Packit |
ae235b |
#include "gasyncresult.h"
|
|
Packit |
ae235b |
#include "gtask.h"
|
|
Packit |
ae235b |
#include "gseekable.h"
|
|
Packit |
ae235b |
#include "gioerror.h"
|
|
Packit |
ae235b |
#include <string.h>
|
|
Packit |
ae235b |
#include "glibintl.h"
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* SECTION:gbufferedinputstream
|
|
Packit |
ae235b |
* @short_description: Buffered Input Stream
|
|
Packit |
ae235b |
* @include: gio/gio.h
|
|
Packit |
ae235b |
* @see_also: #GFilterInputStream, #GInputStream
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Buffered input stream implements #GFilterInputStream and provides
|
|
Packit |
ae235b |
* for buffered reads.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* By default, #GBufferedInputStream's buffer size is set at 4 kilobytes.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* To create a buffered input stream, use g_buffered_input_stream_new(),
|
|
Packit |
ae235b |
* or g_buffered_input_stream_new_sized() to specify the buffer's size at
|
|
Packit |
ae235b |
* construction.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* To get the size of a buffer within a buffered input stream, use
|
|
Packit |
ae235b |
* g_buffered_input_stream_get_buffer_size(). To change the size of a
|
|
Packit |
ae235b |
* buffered input stream's buffer, use
|
|
Packit |
ae235b |
* g_buffered_input_stream_set_buffer_size(). Note that the buffer's size
|
|
Packit |
ae235b |
* cannot be reduced below the size of the data within the buffer.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
#define DEFAULT_BUFFER_SIZE 4096
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
struct _GBufferedInputStreamPrivate {
|
|
Packit |
ae235b |
guint8 *buffer;
|
|
Packit |
ae235b |
gsize len;
|
|
Packit |
ae235b |
gsize pos;
|
|
Packit |
ae235b |
gsize end;
|
|
Packit |
ae235b |
GAsyncReadyCallback outstanding_callback;
|
|
Packit |
ae235b |
};
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
enum {
|
|
Packit |
ae235b |
PROP_0,
|
|
Packit |
ae235b |
PROP_BUFSIZE
|
|
Packit |
ae235b |
};
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void g_buffered_input_stream_set_property (GObject *object,
|
|
Packit |
ae235b |
guint prop_id,
|
|
Packit |
ae235b |
const GValue *value,
|
|
Packit |
ae235b |
GParamSpec *pspec);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void g_buffered_input_stream_get_property (GObject *object,
|
|
Packit |
ae235b |
guint prop_id,
|
|
Packit |
ae235b |
GValue *value,
|
|
Packit |
ae235b |
GParamSpec *pspec);
|
|
Packit |
ae235b |
static void g_buffered_input_stream_finalize (GObject *object);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gssize g_buffered_input_stream_skip (GInputStream *stream,
|
|
Packit |
ae235b |
gsize count,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error);
|
|
Packit |
ae235b |
static void g_buffered_input_stream_skip_async (GInputStream *stream,
|
|
Packit |
ae235b |
gsize count,
|
|
Packit |
ae235b |
int io_priority,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GAsyncReadyCallback callback,
|
|
Packit |
ae235b |
gpointer user_data);
|
|
Packit |
ae235b |
static gssize g_buffered_input_stream_skip_finish (GInputStream *stream,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
GError **error);
|
|
Packit |
ae235b |
static gssize g_buffered_input_stream_read (GInputStream *stream,
|
|
Packit |
ae235b |
void *buffer,
|
|
Packit |
ae235b |
gsize count,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error);
|
|
Packit |
ae235b |
static gssize g_buffered_input_stream_real_fill (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gssize count,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error);
|
|
Packit |
ae235b |
static void g_buffered_input_stream_real_fill_async (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gssize count,
|
|
Packit |
ae235b |
int io_priority,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GAsyncReadyCallback callback,
|
|
Packit |
ae235b |
gpointer user_data);
|
|
Packit |
ae235b |
static gssize g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
GError **error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void g_buffered_input_stream_seekable_iface_init (GSeekableIface *iface);
|
|
Packit |
ae235b |
static goffset g_buffered_input_stream_tell (GSeekable *seekable);
|
|
Packit |
ae235b |
static gboolean g_buffered_input_stream_can_seek (GSeekable *seekable);
|
|
Packit |
ae235b |
static gboolean g_buffered_input_stream_seek (GSeekable *seekable,
|
|
Packit |
ae235b |
goffset offset,
|
|
Packit |
ae235b |
GSeekType type,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error);
|
|
Packit |
ae235b |
static gboolean g_buffered_input_stream_can_truncate (GSeekable *seekable);
|
|
Packit |
ae235b |
static gboolean g_buffered_input_stream_truncate (GSeekable *seekable,
|
|
Packit |
ae235b |
goffset offset,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void compact_buffer (GBufferedInputStream *stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
G_DEFINE_TYPE_WITH_CODE (GBufferedInputStream,
|
|
Packit |
ae235b |
g_buffered_input_stream,
|
|
Packit |
ae235b |
G_TYPE_FILTER_INPUT_STREAM,
|
|
Packit |
ae235b |
G_ADD_PRIVATE (GBufferedInputStream)
|
|
Packit |
ae235b |
G_IMPLEMENT_INTERFACE (G_TYPE_SEEKABLE,
|
|
Packit |
ae235b |
g_buffered_input_stream_seekable_iface_init))
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_class_init (GBufferedInputStreamClass *klass)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GObjectClass *object_class;
|
|
Packit |
ae235b |
GInputStreamClass *istream_class;
|
|
Packit |
ae235b |
GBufferedInputStreamClass *bstream_class;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
object_class = G_OBJECT_CLASS (klass);
|
|
Packit |
ae235b |
object_class->get_property = g_buffered_input_stream_get_property;
|
|
Packit |
ae235b |
object_class->set_property = g_buffered_input_stream_set_property;
|
|
Packit |
ae235b |
object_class->finalize = g_buffered_input_stream_finalize;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
istream_class = G_INPUT_STREAM_CLASS (klass);
|
|
Packit |
ae235b |
istream_class->skip = g_buffered_input_stream_skip;
|
|
Packit |
ae235b |
istream_class->skip_async = g_buffered_input_stream_skip_async;
|
|
Packit |
ae235b |
istream_class->skip_finish = g_buffered_input_stream_skip_finish;
|
|
Packit |
ae235b |
istream_class->read_fn = g_buffered_input_stream_read;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream_class = G_BUFFERED_INPUT_STREAM_CLASS (klass);
|
|
Packit |
ae235b |
bstream_class->fill = g_buffered_input_stream_real_fill;
|
|
Packit |
ae235b |
bstream_class->fill_async = g_buffered_input_stream_real_fill_async;
|
|
Packit |
ae235b |
bstream_class->fill_finish = g_buffered_input_stream_real_fill_finish;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_object_class_install_property (object_class,
|
|
Packit |
ae235b |
PROP_BUFSIZE,
|
|
Packit |
ae235b |
g_param_spec_uint ("buffer-size",
|
|
Packit |
ae235b |
P_("Buffer Size"),
|
|
Packit |
ae235b |
P_("The size of the backend buffer"),
|
|
Packit |
ae235b |
1,
|
|
Packit |
ae235b |
G_MAXUINT,
|
|
Packit |
ae235b |
DEFAULT_BUFFER_SIZE,
|
|
Packit |
ae235b |
G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
|
|
Packit |
ae235b |
G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_get_buffer_size:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Gets the size of the input buffer.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: the current buffer size.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
gsize
|
|
Packit |
ae235b |
g_buffered_input_stream_get_buffer_size (GBufferedInputStream *stream)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), 0);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return stream->priv->len;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_set_buffer_size:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
* @size: a #gsize
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Sets the size of the internal buffer of @stream to @size, or to the
|
|
Packit |
ae235b |
* size of the contents of the buffer. The buffer can never be resized
|
|
Packit |
ae235b |
* smaller than its current contents.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
void
|
|
Packit |
ae235b |
g_buffered_input_stream_set_buffer_size (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gsize size)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
gsize in_buffer;
|
|
Packit |
ae235b |
guint8 *buffer;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream));
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv = stream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (priv->len == size)
|
|
Packit |
ae235b |
return;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (priv->buffer)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
in_buffer = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Never resize smaller than current buffer contents */
|
|
Packit |
ae235b |
size = MAX (size, in_buffer);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
buffer = g_malloc (size);
|
|
Packit |
ae235b |
memcpy (buffer, priv->buffer + priv->pos, in_buffer);
|
|
Packit |
ae235b |
priv->len = size;
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = in_buffer;
|
|
Packit |
ae235b |
g_free (priv->buffer);
|
|
Packit |
ae235b |
priv->buffer = buffer;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
priv->len = size;
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = 0;
|
|
Packit |
ae235b |
priv->buffer = g_malloc (size);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_object_notify (G_OBJECT (stream), "buffer-size");
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_set_property (GObject *object,
|
|
Packit |
ae235b |
guint prop_id,
|
|
Packit |
ae235b |
const GValue *value,
|
|
Packit |
ae235b |
GParamSpec *pspec)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (object);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
switch (prop_id)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
case PROP_BUFSIZE:
|
|
Packit |
ae235b |
g_buffered_input_stream_set_buffer_size (bstream, g_value_get_uint (value));
|
|
Packit |
ae235b |
break;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
default:
|
|
Packit |
ae235b |
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
Packit |
ae235b |
break;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_get_property (GObject *object,
|
|
Packit |
ae235b |
guint prop_id,
|
|
Packit |
ae235b |
GValue *value,
|
|
Packit |
ae235b |
GParamSpec *pspec)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (object);
|
|
Packit |
ae235b |
priv = bstream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
switch (prop_id)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
case PROP_BUFSIZE:
|
|
Packit |
ae235b |
g_value_set_uint (value, priv->len);
|
|
Packit |
ae235b |
break;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
default:
|
|
Packit |
ae235b |
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
Packit |
ae235b |
break;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_finalize (GObject *object)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GBufferedInputStream *stream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
stream = G_BUFFERED_INPUT_STREAM (object);
|
|
Packit |
ae235b |
priv = stream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_free (priv->buffer);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
G_OBJECT_CLASS (g_buffered_input_stream_parent_class)->finalize (object);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_seekable_iface_init (GSeekableIface *iface)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
iface->tell = g_buffered_input_stream_tell;
|
|
Packit |
ae235b |
iface->can_seek = g_buffered_input_stream_can_seek;
|
|
Packit |
ae235b |
iface->seek = g_buffered_input_stream_seek;
|
|
Packit |
ae235b |
iface->can_truncate = g_buffered_input_stream_can_truncate;
|
|
Packit |
ae235b |
iface->truncate_fn = g_buffered_input_stream_truncate;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_init (GBufferedInputStream *stream)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
stream->priv = g_buffered_input_stream_get_instance_private (stream);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_new:
|
|
Packit |
ae235b |
* @base_stream: a #GInputStream
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Creates a new #GInputStream from the given @base_stream, with
|
|
Packit |
ae235b |
* a buffer set to the default size (4 kilobytes).
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: a #GInputStream for the given @base_stream.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
GInputStream *
|
|
Packit |
ae235b |
g_buffered_input_stream_new (GInputStream *base_stream)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GInputStream *stream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
stream = g_object_new (G_TYPE_BUFFERED_INPUT_STREAM,
|
|
Packit |
ae235b |
"base-stream", base_stream,
|
|
Packit |
ae235b |
NULL);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return stream;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_new_sized:
|
|
Packit |
ae235b |
* @base_stream: a #GInputStream
|
|
Packit |
ae235b |
* @size: a #gsize
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Creates a new #GBufferedInputStream from the given @base_stream,
|
|
Packit |
ae235b |
* with a buffer set to @size.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: a #GInputStream.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
GInputStream *
|
|
Packit |
ae235b |
g_buffered_input_stream_new_sized (GInputStream *base_stream,
|
|
Packit |
ae235b |
gsize size)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GInputStream *stream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
stream = g_object_new (G_TYPE_BUFFERED_INPUT_STREAM,
|
|
Packit |
ae235b |
"base-stream", base_stream,
|
|
Packit |
ae235b |
"buffer-size", (guint)size,
|
|
Packit |
ae235b |
NULL);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return stream;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_fill:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
* @count: the number of bytes that will be read from the stream
|
|
Packit |
ae235b |
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
|
|
Packit |
ae235b |
* @error: location to store the error occurring, or %NULL to ignore
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Tries to read @count bytes from the stream into the buffer.
|
|
Packit |
ae235b |
* Will block during this read.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* If @count is zero, returns zero and does nothing. A value of @count
|
|
Packit |
ae235b |
* larger than %G_MAXSSIZE will cause a %G_IO_ERROR_INVALID_ARGUMENT error.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* On success, the number of bytes read into the buffer is returned.
|
|
Packit |
ae235b |
* It is not an error if this is not the same as the requested size, as it
|
|
Packit |
ae235b |
* can happen e.g. near the end of a file. Zero is returned on end of file
|
|
Packit |
ae235b |
* (or if @count is zero), but never otherwise.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* If @count is -1 then the attempted read size is equal to the number of
|
|
Packit |
ae235b |
* bytes that are required to fill the buffer.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* If @cancellable is not %NULL, then the operation can be cancelled by
|
|
Packit |
ae235b |
* triggering the cancellable object from another thread. If the operation
|
|
Packit |
ae235b |
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
|
|
Packit |
ae235b |
* operation was partially finished when the operation was cancelled the
|
|
Packit |
ae235b |
* partial result will be returned, without an error.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* On error -1 is returned and @error is set accordingly.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* For the asynchronous, non-blocking, version of this function, see
|
|
Packit |
ae235b |
* g_buffered_input_stream_fill_async().
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: the number of bytes read into @stream's buffer, up to @count,
|
|
Packit |
ae235b |
* or -1 on error.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
gssize
|
|
Packit |
ae235b |
g_buffered_input_stream_fill (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gssize count,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamClass *class;
|
|
Packit |
ae235b |
GInputStream *input_stream;
|
|
Packit |
ae235b |
gssize res;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
input_stream = G_INPUT_STREAM (stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count < -1)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
|
|
Packit |
ae235b |
_("Too large count value passed to %s"), G_STRFUNC);
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (!g_input_stream_set_pending (input_stream, error))
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (cancellable)
|
|
Packit |
ae235b |
g_cancellable_push_current (cancellable);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
|
|
Packit |
ae235b |
res = class->fill (stream, count, cancellable, error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (cancellable)
|
|
Packit |
ae235b |
g_cancellable_pop_current (cancellable);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_input_stream_clear_pending (input_stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return res;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
async_fill_callback_wrapper (GObject *source_object,
|
|
Packit |
ae235b |
GAsyncResult *res,
|
|
Packit |
ae235b |
gpointer user_data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *stream = G_BUFFERED_INPUT_STREAM (source_object);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_input_stream_clear_pending (G_INPUT_STREAM (stream));
|
|
Packit |
ae235b |
(*stream->priv->outstanding_callback) (source_object, res, user_data);
|
|
Packit |
ae235b |
g_object_unref (stream);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_fill_async:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
* @count: the number of bytes that will be read from the stream
|
|
Packit |
ae235b |
* @io_priority: the [I/O priority][io-priority] of the request
|
|
Packit |
ae235b |
* @cancellable: (nullable): optional #GCancellable object
|
|
Packit |
ae235b |
* @callback: (scope async): a #GAsyncReadyCallback
|
|
Packit |
ae235b |
* @user_data: (closure): a #gpointer
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Reads data into @stream's buffer asynchronously, up to @count size.
|
|
Packit |
ae235b |
* @io_priority can be used to prioritize reads. For the synchronous
|
|
Packit |
ae235b |
* version of this function, see g_buffered_input_stream_fill().
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* If @count is -1 then the attempted read size is equal to the number
|
|
Packit |
ae235b |
* of bytes that are required to fill the buffer.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
void
|
|
Packit |
ae235b |
g_buffered_input_stream_fill_async (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gssize count,
|
|
Packit |
ae235b |
int io_priority,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GAsyncReadyCallback callback,
|
|
Packit |
ae235b |
gpointer user_data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamClass *class;
|
|
Packit |
ae235b |
GError *error = NULL;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream));
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count == 0)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GTask *task;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
task = g_task_new (stream, cancellable, callback, user_data);
|
|
Packit |
ae235b |
g_task_set_source_tag (task, g_buffered_input_stream_fill_async);
|
|
Packit |
ae235b |
g_task_return_int (task, 0);
|
|
Packit |
ae235b |
g_object_unref (task);
|
|
Packit |
ae235b |
return;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count < -1)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_task_report_new_error (stream, callback, user_data,
|
|
Packit |
ae235b |
g_buffered_input_stream_fill_async,
|
|
Packit |
ae235b |
G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
|
|
Packit |
ae235b |
_("Too large count value passed to %s"),
|
|
Packit |
ae235b |
G_STRFUNC);
|
|
Packit |
ae235b |
return;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (!g_input_stream_set_pending (G_INPUT_STREAM (stream), &error))
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_task_report_error (stream, callback, user_data,
|
|
Packit |
ae235b |
g_buffered_input_stream_fill_async,
|
|
Packit |
ae235b |
error);
|
|
Packit |
ae235b |
return;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
stream->priv->outstanding_callback = callback;
|
|
Packit |
ae235b |
g_object_ref (stream);
|
|
Packit |
ae235b |
class->fill_async (stream, count, io_priority, cancellable,
|
|
Packit |
ae235b |
async_fill_callback_wrapper, user_data);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_fill_finish:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
* @result: a #GAsyncResult
|
|
Packit |
ae235b |
* @error: a #GError
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Finishes an asynchronous read.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: a #gssize of the read stream, or `-1` on an error.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
gssize
|
|
Packit |
ae235b |
g_buffered_input_stream_fill_finish (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamClass *class;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), -1);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (g_async_result_legacy_propagate_error (result, error))
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
else if (g_async_result_is_tagged (result, g_buffered_input_stream_fill_async))
|
|
Packit |
ae235b |
return g_task_propagate_int (G_TASK (result), error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
|
|
Packit |
ae235b |
return class->fill_finish (stream, result, error);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_get_available:
|
|
Packit |
ae235b |
* @stream: #GBufferedInputStream
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Gets the size of the available data within the stream.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: size of the available stream.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
gsize
|
|
Packit |
ae235b |
g_buffered_input_stream_get_available (GBufferedInputStream *stream)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return stream->priv->end - stream->priv->pos;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_peek:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
* @buffer: (array length=count) (element-type guint8): a pointer to
|
|
Packit |
ae235b |
* an allocated chunk of memory
|
|
Packit |
ae235b |
* @offset: a #gsize
|
|
Packit |
ae235b |
* @count: a #gsize
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Peeks in the buffer, copying data of size @count into @buffer,
|
|
Packit |
ae235b |
* offset @offset bytes.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: a #gsize of the number of bytes peeked, or -1 on error.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
gsize
|
|
Packit |
ae235b |
g_buffered_input_stream_peek (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
void *buffer,
|
|
Packit |
ae235b |
gsize offset,
|
|
Packit |
ae235b |
gsize count)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
gsize available;
|
|
Packit |
ae235b |
gsize end;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
|
|
Packit |
ae235b |
g_return_val_if_fail (buffer != NULL, -1);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = g_buffered_input_stream_get_available (stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (offset > available)
|
|
Packit |
ae235b |
return 0;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
end = MIN (offset + count, available);
|
|
Packit |
ae235b |
count = end - offset;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
memcpy (buffer, stream->priv->buffer + stream->priv->pos + offset, count);
|
|
Packit |
ae235b |
return count;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_peek_buffer:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
* @count: (out): a #gsize to get the number of bytes available in the buffer
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns the buffer with the currently available bytes. The returned
|
|
Packit |
ae235b |
* buffer must not be modified and will become invalid when reading from
|
|
Packit |
ae235b |
* the stream or filling the buffer.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: (array length=count) (element-type guint8) (transfer none):
|
|
Packit |
ae235b |
* read-only buffer
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
const void*
|
|
Packit |
ae235b |
g_buffered_input_stream_peek_buffer (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gsize *count)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), NULL);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv = stream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count)
|
|
Packit |
ae235b |
*count = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return priv->buffer + priv->pos;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
compact_buffer (GBufferedInputStream *stream)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
gsize current_size;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv = stream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
current_size = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
memmove (priv->buffer, priv->buffer + priv->pos, current_size);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = current_size;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gssize
|
|
Packit |
ae235b |
g_buffered_input_stream_real_fill (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gssize count,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
gssize nread;
|
|
Packit |
ae235b |
gsize in_buffer;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv = stream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count == -1)
|
|
Packit |
ae235b |
count = priv->len;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
in_buffer = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Never fill more than can fit in the buffer */
|
|
Packit |
ae235b |
count = MIN (count, priv->len - in_buffer);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* If requested length does not fit at end, compact */
|
|
Packit |
ae235b |
if (priv->len - priv->end < count)
|
|
Packit |
ae235b |
compact_buffer (stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
|
|
Packit |
ae235b |
nread = g_input_stream_read (base_stream,
|
|
Packit |
ae235b |
priv->buffer + priv->end,
|
|
Packit |
ae235b |
count,
|
|
Packit |
ae235b |
cancellable,
|
|
Packit |
ae235b |
error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread > 0)
|
|
Packit |
ae235b |
priv->end += nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return nread;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gssize
|
|
Packit |
ae235b |
g_buffered_input_stream_skip (GInputStream *stream,
|
|
Packit |
ae235b |
gsize count,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GBufferedInputStreamClass *class;
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
gsize available, bytes_skipped;
|
|
Packit |
ae235b |
gssize nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (stream);
|
|
Packit |
ae235b |
priv = bstream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count <= available)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
priv->pos += count;
|
|
Packit |
ae235b |
return count;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Full request not available, skip all currently available and
|
|
Packit |
ae235b |
* request refill for more
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = 0;
|
|
Packit |
ae235b |
bytes_skipped = available;
|
|
Packit |
ae235b |
count -= available;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (bytes_skipped > 0)
|
|
Packit |
ae235b |
error = NULL; /* Ignore further errors if we already read some data */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count > priv->len)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
/* Large request, shortcut buffer */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
nread = g_input_stream_skip (base_stream,
|
|
Packit |
ae235b |
count,
|
|
Packit |
ae235b |
cancellable,
|
|
Packit |
ae235b |
error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread < 0 && bytes_skipped == 0)
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread > 0)
|
|
Packit |
ae235b |
bytes_skipped += nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return bytes_skipped;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
|
|
Packit |
ae235b |
nread = class->fill (bstream, priv->len, cancellable, error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread < 0)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
if (bytes_skipped == 0)
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
return bytes_skipped;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
count = MIN (count, available);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bytes_skipped += count;
|
|
Packit |
ae235b |
priv->pos += count;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return bytes_skipped;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gssize
|
|
Packit |
ae235b |
g_buffered_input_stream_read (GInputStream *stream,
|
|
Packit |
ae235b |
void *buffer,
|
|
Packit |
ae235b |
gsize count,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GBufferedInputStreamClass *class;
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
gsize available, bytes_read;
|
|
Packit |
ae235b |
gssize nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (stream);
|
|
Packit |
ae235b |
priv = bstream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count <= available)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
memcpy (buffer, priv->buffer + priv->pos, count);
|
|
Packit |
ae235b |
priv->pos += count;
|
|
Packit |
ae235b |
return count;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Full request not available, read all currently available and
|
|
Packit |
ae235b |
* request refill for more
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
memcpy (buffer, priv->buffer + priv->pos, available);
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = 0;
|
|
Packit |
ae235b |
bytes_read = available;
|
|
Packit |
ae235b |
count -= available;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (bytes_read > 0)
|
|
Packit |
ae235b |
error = NULL; /* Ignore further errors if we already read some data */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count > priv->len)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
/* Large request, shortcut buffer */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
nread = g_input_stream_read (base_stream,
|
|
Packit |
ae235b |
(char *)buffer + bytes_read,
|
|
Packit |
ae235b |
count,
|
|
Packit |
ae235b |
cancellable,
|
|
Packit |
ae235b |
error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread < 0 && bytes_read == 0)
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread > 0)
|
|
Packit |
ae235b |
bytes_read += nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return bytes_read;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
|
|
Packit |
ae235b |
nread = class->fill (bstream, priv->len, cancellable, error);
|
|
Packit |
ae235b |
if (nread < 0)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
if (bytes_read == 0)
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
return bytes_read;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
count = MIN (count, available);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
memcpy ((char *)buffer + bytes_read, (char *)priv->buffer + priv->pos, count);
|
|
Packit |
ae235b |
bytes_read += count;
|
|
Packit |
ae235b |
priv->pos += count;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return bytes_read;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static goffset
|
|
Packit |
ae235b |
g_buffered_input_stream_tell (GSeekable *seekable)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
GSeekable *base_stream_seekable;
|
|
Packit |
ae235b |
gsize available;
|
|
Packit |
ae235b |
goffset base_offset;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (seekable);
|
|
Packit |
ae235b |
priv = bstream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (seekable)->base_stream;
|
|
Packit |
ae235b |
if (!G_IS_SEEKABLE (base_stream))
|
|
Packit |
ae235b |
return 0;
|
|
Packit |
ae235b |
base_stream_seekable = G_SEEKABLE (base_stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
base_offset = g_seekable_tell (base_stream_seekable);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return base_offset - available;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gboolean
|
|
Packit |
ae235b |
g_buffered_input_stream_can_seek (GSeekable *seekable)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (seekable)->base_stream;
|
|
Packit |
ae235b |
return G_IS_SEEKABLE (base_stream) && g_seekable_can_seek (G_SEEKABLE (base_stream));
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gboolean
|
|
Packit |
ae235b |
g_buffered_input_stream_seek (GSeekable *seekable,
|
|
Packit |
ae235b |
goffset offset,
|
|
Packit |
ae235b |
GSeekType type,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
GSeekable *base_stream_seekable;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (seekable);
|
|
Packit |
ae235b |
priv = bstream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (seekable)->base_stream;
|
|
Packit |
ae235b |
if (!G_IS_SEEKABLE (base_stream))
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
|
|
Packit |
ae235b |
_("Seek not supported on base stream"));
|
|
Packit |
ae235b |
return FALSE;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream_seekable = G_SEEKABLE (base_stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (type == G_SEEK_CUR)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
if (offset <= priv->end - priv->pos && offset >= -priv->pos)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
priv->pos += offset;
|
|
Packit |
ae235b |
return TRUE;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
offset -= priv->end - priv->pos;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (g_seekable_seek (base_stream_seekable, offset, type, cancellable, error))
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = 0;
|
|
Packit |
ae235b |
return TRUE;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
return FALSE;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gboolean
|
|
Packit |
ae235b |
g_buffered_input_stream_can_truncate (GSeekable *seekable)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
return FALSE;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gboolean
|
|
Packit |
ae235b |
g_buffered_input_stream_truncate (GSeekable *seekable,
|
|
Packit |
ae235b |
goffset offset,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_set_error_literal (error,
|
|
Packit |
ae235b |
G_IO_ERROR,
|
|
Packit |
ae235b |
G_IO_ERROR_NOT_SUPPORTED,
|
|
Packit |
ae235b |
_("Cannot truncate GBufferedInputStream"));
|
|
Packit |
ae235b |
return FALSE;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_buffered_input_stream_read_byte:
|
|
Packit |
ae235b |
* @stream: a #GBufferedInputStream
|
|
Packit |
ae235b |
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
|
|
Packit |
ae235b |
* @error: location to store the error occurring, or %NULL to ignore
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Tries to read a single byte from the stream or the buffer. Will block
|
|
Packit |
ae235b |
* during this read.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* On success, the byte read from the stream is returned. On end of stream
|
|
Packit |
ae235b |
* -1 is returned but it's not an exceptional error and @error is not set.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* If @cancellable is not %NULL, then the operation can be cancelled by
|
|
Packit |
ae235b |
* triggering the cancellable object from another thread. If the operation
|
|
Packit |
ae235b |
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
|
|
Packit |
ae235b |
* operation was partially finished when the operation was cancelled the
|
|
Packit |
ae235b |
* partial result will be returned, without an error.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* On error -1 is returned and @error is set accordingly.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: the byte read from the @stream, or -1 on end of stream or error.
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
int
|
|
Packit |
ae235b |
g_buffered_input_stream_read_byte (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GBufferedInputStreamClass *class;
|
|
Packit |
ae235b |
GInputStream *input_stream;
|
|
Packit |
ae235b |
gsize available;
|
|
Packit |
ae235b |
gssize nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv = stream->priv;
|
|
Packit |
ae235b |
input_stream = G_INPUT_STREAM (stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (g_input_stream_is_closed (input_stream))
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
|
|
Packit |
ae235b |
_("Stream is already closed"));
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (!g_input_stream_set_pending (input_stream, error))
|
|
Packit |
ae235b |
return -1;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (available != 0)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_input_stream_clear_pending (input_stream);
|
|
Packit |
ae235b |
return priv->buffer[priv->pos++];
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Byte not available, request refill for more */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (cancellable)
|
|
Packit |
ae235b |
g_cancellable_push_current (cancellable);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = 0;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
|
|
Packit |
ae235b |
nread = class->fill (stream, priv->len, cancellable, error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (cancellable)
|
|
Packit |
ae235b |
g_cancellable_pop_current (cancellable);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_input_stream_clear_pending (input_stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread <= 0)
|
|
Packit |
ae235b |
return -1; /* error or end of stream */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return priv->buffer[priv->pos++];
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* ************************** */
|
|
Packit |
ae235b |
/* Async stuff implementation */
|
|
Packit |
ae235b |
/* ************************** */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
fill_async_callback (GObject *source_object,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
gpointer user_data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GError *error;
|
|
Packit |
ae235b |
gssize res;
|
|
Packit |
ae235b |
GTask *task = user_data;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
error = NULL;
|
|
Packit |
ae235b |
res = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
|
|
Packit |
ae235b |
result, &error);
|
|
Packit |
ae235b |
if (res == -1)
|
|
Packit |
ae235b |
g_task_return_error (task, error);
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *stream;
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
stream = g_task_get_source_object (task);
|
|
Packit |
ae235b |
priv = G_BUFFERED_INPUT_STREAM (stream)->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_assert_cmpint (priv->end + res, <=, priv->len);
|
|
Packit |
ae235b |
priv->end += res;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_task_return_int (task, res);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_object_unref (task);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_real_fill_async (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
gssize count,
|
|
Packit |
ae235b |
int io_priority,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GAsyncReadyCallback callback,
|
|
Packit |
ae235b |
gpointer user_data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
GTask *task;
|
|
Packit |
ae235b |
gsize in_buffer;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv = stream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count == -1)
|
|
Packit |
ae235b |
count = priv->len;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
in_buffer = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Never fill more than can fit in the buffer */
|
|
Packit |
ae235b |
count = MIN (count, priv->len - in_buffer);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* If requested length does not fit at end, compact */
|
|
Packit |
ae235b |
if (priv->len - priv->end < count)
|
|
Packit |
ae235b |
compact_buffer (stream);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
task = g_task_new (stream, cancellable, callback, user_data);
|
|
Packit |
ae235b |
g_task_set_source_tag (task, g_buffered_input_stream_real_fill_async);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
|
|
Packit |
ae235b |
g_input_stream_read_async (base_stream,
|
|
Packit |
ae235b |
priv->buffer + priv->end,
|
|
Packit |
ae235b |
count,
|
|
Packit |
ae235b |
io_priority,
|
|
Packit |
ae235b |
cancellable,
|
|
Packit |
ae235b |
fill_async_callback,
|
|
Packit |
ae235b |
task);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gssize
|
|
Packit |
ae235b |
g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_return_val_if_fail (g_task_is_valid (result, stream), -1);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return g_task_propagate_int (G_TASK (result), error);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
typedef struct
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
gssize bytes_skipped;
|
|
Packit |
ae235b |
gssize count;
|
|
Packit |
ae235b |
} SkipAsyncData;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
free_skip_async_data (gpointer _data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
SkipAsyncData *data = _data;
|
|
Packit |
ae235b |
g_slice_free (SkipAsyncData, data);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
large_skip_callback (GObject *source_object,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
gpointer user_data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GTask *task = G_TASK (user_data);
|
|
Packit |
ae235b |
SkipAsyncData *data;
|
|
Packit |
ae235b |
GError *error;
|
|
Packit |
ae235b |
gssize nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
data = g_task_get_task_data (task);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
error = NULL;
|
|
Packit |
ae235b |
nread = g_input_stream_skip_finish (G_INPUT_STREAM (source_object),
|
|
Packit |
ae235b |
result, &error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Only report the error if we've not already read some data */
|
|
Packit |
ae235b |
if (nread < 0 && data->bytes_skipped == 0)
|
|
Packit |
ae235b |
g_task_return_error (task, error);
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
if (error)
|
|
Packit |
ae235b |
g_error_free (error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread > 0)
|
|
Packit |
ae235b |
data->bytes_skipped += nread;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_task_return_int (task, data->bytes_skipped);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_object_unref (task);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
skip_fill_buffer_callback (GObject *source_object,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
gpointer user_data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GTask *task = G_TASK (user_data);
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
SkipAsyncData *data;
|
|
Packit |
ae235b |
GError *error;
|
|
Packit |
ae235b |
gssize nread;
|
|
Packit |
ae235b |
gsize available;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (source_object);
|
|
Packit |
ae235b |
priv = bstream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
data = g_task_get_task_data (task);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
error = NULL;
|
|
Packit |
ae235b |
nread = g_buffered_input_stream_fill_finish (bstream,
|
|
Packit |
ae235b |
result, &error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread < 0 && data->bytes_skipped == 0)
|
|
Packit |
ae235b |
g_task_return_error (task, error);
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
if (error)
|
|
Packit |
ae235b |
g_error_free (error);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (nread > 0)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
data->count = MIN (data->count, available);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
data->bytes_skipped += data->count;
|
|
Packit |
ae235b |
priv->pos += data->count;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_task_return_int (task, data->bytes_skipped);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_object_unref (task);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_buffered_input_stream_skip_async (GInputStream *stream,
|
|
Packit |
ae235b |
gsize count,
|
|
Packit |
ae235b |
int io_priority,
|
|
Packit |
ae235b |
GCancellable *cancellable,
|
|
Packit |
ae235b |
GAsyncReadyCallback callback,
|
|
Packit |
ae235b |
gpointer user_data)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GBufferedInputStream *bstream;
|
|
Packit |
ae235b |
GBufferedInputStreamPrivate *priv;
|
|
Packit |
ae235b |
GBufferedInputStreamClass *class;
|
|
Packit |
ae235b |
GInputStream *base_stream;
|
|
Packit |
ae235b |
gsize available;
|
|
Packit |
ae235b |
GTask *task;
|
|
Packit |
ae235b |
SkipAsyncData *data;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
bstream = G_BUFFERED_INPUT_STREAM (stream);
|
|
Packit |
ae235b |
priv = bstream->priv;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
data = g_slice_new (SkipAsyncData);
|
|
Packit |
ae235b |
data->bytes_skipped = 0;
|
|
Packit |
ae235b |
task = g_task_new (stream, cancellable, callback, user_data);
|
|
Packit |
ae235b |
g_task_set_source_tag (task, g_buffered_input_stream_skip_async);
|
|
Packit |
ae235b |
g_task_set_task_data (task, data, free_skip_async_data);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
available = priv->end - priv->pos;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count <= available)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
priv->pos += count;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_task_return_int (task, count);
|
|
Packit |
ae235b |
g_object_unref (task);
|
|
Packit |
ae235b |
return;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Full request not available, skip all currently available
|
|
Packit |
ae235b |
* and request refill for more
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
priv->pos = 0;
|
|
Packit |
ae235b |
priv->end = 0;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
count -= available;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
data->bytes_skipped = available;
|
|
Packit |
ae235b |
data->count = count;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (count > priv->len)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
/* Large request, shortcut buffer */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_input_stream_skip_async (base_stream,
|
|
Packit |
ae235b |
count,
|
|
Packit |
ae235b |
io_priority, cancellable,
|
|
Packit |
ae235b |
large_skip_callback,
|
|
Packit |
ae235b |
task);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
else
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
|
|
Packit |
ae235b |
class->fill_async (bstream, priv->len, io_priority, cancellable,
|
|
Packit |
ae235b |
skip_fill_buffer_callback, task);
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static gssize
|
|
Packit |
ae235b |
g_buffered_input_stream_skip_finish (GInputStream *stream,
|
|
Packit |
ae235b |
GAsyncResult *result,
|
|
Packit |
ae235b |
GError **error)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_return_val_if_fail (g_task_is_valid (result, stream), -1);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return g_task_propagate_int (G_TASK (result), error);
|
|
Packit |
ae235b |
}
|