#include "gcancellable.h"
#include "gasyncresult.h"
#include "gsimpleasyncresult.h"
+#include "gseekable.h"
#include "gioerror.h"
#include <string.h>
#include "glibintl.h"
gsize count,
GCancellable *cancellable,
GError **error);
-static void g_buffered_input_stream_read_async (GInputStream *stream,
- void *buffer,
- gsize count,
- int io_priority,
- GCancellable *cancellable,
- GAsyncReadyCallback callback,
- gpointer user_data);
-static gssize g_buffered_input_stream_read_finish (GInputStream *stream,
- GAsyncResult *result,
- GError **error);
static gssize g_buffered_input_stream_real_fill (GBufferedInputStream *stream,
gssize count,
GCancellable *cancellable,
GAsyncResult *result,
GError **error);
-static void compact_buffer (GBufferedInputStream *stream);
+static void g_buffered_input_stream_seekable_iface_init (GSeekableIface *iface);
+static goffset g_buffered_input_stream_tell (GSeekable *seekable);
+static gboolean g_buffered_input_stream_can_seek (GSeekable *seekable);
+static gboolean g_buffered_input_stream_seek (GSeekable *seekable,
+ goffset offset,
+ GSeekType type,
+ GCancellable *cancellable,
+ GError **error);
+static gboolean g_buffered_input_stream_can_truncate (GSeekable *seekable);
+static gboolean g_buffered_input_stream_truncate (GSeekable *seekable,
+ goffset offset,
+ GCancellable *cancellable,
+ GError **error);
+
+static void g_buffered_input_stream_finalize (GObject *object);
-G_DEFINE_TYPE (GBufferedInputStream,
- g_buffered_input_stream,
- G_TYPE_FILTER_INPUT_STREAM)
+static void compact_buffer (GBufferedInputStream *stream);
+G_DEFINE_TYPE_WITH_CODE (GBufferedInputStream,
+ g_buffered_input_stream,
+ G_TYPE_FILTER_INPUT_STREAM,
+ G_IMPLEMENT_INTERFACE (G_TYPE_SEEKABLE,
+ g_buffered_input_stream_seekable_iface_init))
static void
g_buffered_input_stream_class_init (GBufferedInputStreamClass *klass)
istream_class->skip_async = g_buffered_input_stream_skip_async;
istream_class->skip_finish = g_buffered_input_stream_skip_finish;
istream_class->read_fn = g_buffered_input_stream_read;
- istream_class->read_async = g_buffered_input_stream_read_async;
- istream_class->read_finish = g_buffered_input_stream_read_finish;
bstream_class = G_BUFFERED_INPUT_STREAM_CLASS (klass);
bstream_class->fill = g_buffered_input_stream_real_fill;
}
static void
+g_buffered_input_stream_seekable_iface_init (GSeekableIface *iface)
+{
+ iface->tell = g_buffered_input_stream_tell;
+ iface->can_seek = g_buffered_input_stream_can_seek;
+ iface->seek = g_buffered_input_stream_seek;
+ iface->can_truncate = g_buffered_input_stream_can_truncate;
+ iface->truncate_fn = g_buffered_input_stream_truncate;
+}
+
+static void
g_buffered_input_stream_init (GBufferedInputStream *stream)
{
stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), -1);
+ if (g_async_result_legacy_propagate_error (result, error))
+ return -1;
+
if (G_IS_SIMPLE_ASYNC_RESULT (result))
{
simple = G_SIMPLE_ASYNC_RESULT (result);
- if (g_simple_async_result_propagate_error (simple, error))
- return -1;
/* Special case read of 0 bytes */
if (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_fill_async)
return bytes_read;
}
+static goffset
+g_buffered_input_stream_tell (GSeekable *seekable)
+{
+ GBufferedInputStream *bstream;
+ GBufferedInputStreamPrivate *priv;
+ GInputStream *base_stream;
+ GSeekable *base_stream_seekable;
+ gsize available;
+ goffset base_offset;
+
+ bstream = G_BUFFERED_INPUT_STREAM (seekable);
+ priv = bstream->priv;
+
+ base_stream = G_FILTER_INPUT_STREAM (seekable)->base_stream;
+ if (!G_IS_SEEKABLE (base_stream))
+ return 0;
+ base_stream_seekable = G_SEEKABLE (base_stream);
+
+ available = priv->end - priv->pos;
+ base_offset = g_seekable_tell (base_stream_seekable);
+
+ return base_offset - available;
+}
+
+static gboolean
+g_buffered_input_stream_can_seek (GSeekable *seekable)
+{
+ GInputStream *base_stream;
+
+ base_stream = G_FILTER_INPUT_STREAM (seekable)->base_stream;
+ return G_IS_SEEKABLE (base_stream) && g_seekable_can_seek (G_SEEKABLE (base_stream));
+}
+
+static gboolean
+g_buffered_input_stream_seek (GSeekable *seekable,
+ goffset offset,
+ GSeekType type,
+ GCancellable *cancellable,
+ GError **error)
+{
+ GBufferedInputStream *bstream;
+ GBufferedInputStreamPrivate *priv;
+ GInputStream *base_stream;
+ GSeekable *base_stream_seekable;
+
+ bstream = G_BUFFERED_INPUT_STREAM (seekable);
+ priv = bstream->priv;
+
+ base_stream = G_FILTER_INPUT_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);
+
+ if (type == G_SEEK_CUR)
+ {
+ if (offset <= priv->end - priv->pos && offset >= -priv->pos)
+ {
+ priv->pos += offset;
+ return TRUE;
+ }
+ else
+ {
+ offset -= priv->end - priv->pos;
+ }
+ }
+
+ if (g_seekable_seek (base_stream_seekable, offset, type, cancellable, error))
+ {
+ priv->pos = 0;
+ priv->end = 0;
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+}
+
+static gboolean
+g_buffered_input_stream_can_truncate (GSeekable *seekable)
+{
+ return FALSE;
+}
+
+static gboolean
+g_buffered_input_stream_truncate (GSeekable *seekable,
+ goffset offset,
+ GCancellable *cancellable,
+ GError **error)
+{
+ g_set_error_literal (error,
+ G_IO_ERROR,
+ G_IO_ERROR_NOT_SUPPORTED,
+ _("Cannot truncate GBufferedInputStream"));
+ return FALSE;
+}
+
/**
* g_buffered_input_stream_read_byte:
* @stream: a #GBufferedInputStream
simple = G_SIMPLE_ASYNC_RESULT (result);
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_real_fill_async);
+ if (g_simple_async_result_propagate_error (simple, error))
+ return -1;
+
nread = g_simple_async_result_get_op_res_gssize (simple);
return nread;
}
typedef struct
{
- gssize bytes_read;
- gssize count;
- void *buffer;
-} ReadAsyncData;
-
-static void
-free_read_async_data (gpointer _data)
-{
- ReadAsyncData *data = _data;
- g_slice_free (ReadAsyncData, data);
-}
-
-static void
-large_read_callback (GObject *source_object,
- GAsyncResult *result,
- gpointer user_data)
-{
- GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
- ReadAsyncData *data;
- GError *error;
- gssize nread;
-
- data = g_simple_async_result_get_op_res_gpointer (simple);
-
- error = NULL;
- nread = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
- result, &error);
-
- /* Only report the error if we've not already read some data */
- if (nread < 0 && data->bytes_read == 0)
- g_simple_async_result_take_error (simple, error);
- else if (error)
- g_error_free (error);
-
- if (nread > 0)
- data->bytes_read += nread;
-
- /* Complete immediately, not in idle, since we're already
- * in a mainloop callout
- */
- g_simple_async_result_complete (simple);
- g_object_unref (simple);
-}
-
-static void
-read_fill_buffer_callback (GObject *source_object,
- GAsyncResult *result,
- gpointer user_data)
-{
- GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
- GBufferedInputStream *bstream;
- GBufferedInputStreamPrivate *priv;
- ReadAsyncData *data;
- GError *error;
- gssize nread;
- gsize available;
-
- bstream = G_BUFFERED_INPUT_STREAM (source_object);
- priv = bstream->priv;
-
- data = g_simple_async_result_get_op_res_gpointer (simple);
-
- error = NULL;
- nread = g_buffered_input_stream_fill_finish (bstream,
- result, &error);
-
- if (nread < 0 && data->bytes_read == 0)
- g_simple_async_result_take_error (simple, error);
- else if (error)
- g_error_free (error);
-
- if (nread > 0)
- {
- available = priv->end - priv->pos;
- data->count = MIN (data->count, available);
-
- memcpy ((char *)data->buffer + data->bytes_read, (char *)priv->buffer + priv->pos, data->count);
- data->bytes_read += data->count;
- priv->pos += data->count;
- }
-
- /* Complete immediately, not in idle, since we're already
- * in a mainloop callout
- */
- g_simple_async_result_complete (simple);
- g_object_unref (simple);
-}
-
-static void
-g_buffered_input_stream_read_async (GInputStream *stream,
- void *buffer,
- gsize count,
- int io_priority,
- GCancellable *cancellable,
- GAsyncReadyCallback callback,
- gpointer user_data)
-{
- GBufferedInputStream *bstream;
- GBufferedInputStreamPrivate *priv;
- GBufferedInputStreamClass *class;
- GInputStream *base_stream;
- gsize available;
- GSimpleAsyncResult *simple;
- ReadAsyncData *data;
-
- bstream = G_BUFFERED_INPUT_STREAM (stream);
- priv = bstream->priv;
-
- data = g_slice_new (ReadAsyncData);
- data->buffer = buffer;
- data->bytes_read = 0;
- simple = g_simple_async_result_new (G_OBJECT (stream),
- callback, user_data,
- g_buffered_input_stream_read_async);
- g_simple_async_result_set_op_res_gpointer (simple, data, free_read_async_data);
-
- available = priv->end - priv->pos;
-
- if (count <= available)
- {
- memcpy (buffer, priv->buffer + priv->pos, count);
- priv->pos += count;
- data->bytes_read = count;
-
- g_simple_async_result_complete_in_idle (simple);
- g_object_unref (simple);
- return;
- }
-
-
- /* Full request not available, read all currently available
- * and request refill for more
- */
-
- memcpy (buffer, priv->buffer + priv->pos, available);
- priv->pos = 0;
- priv->end = 0;
-
- count -= available;
-
- data->bytes_read = available;
- data->count = count;
-
- if (count > priv->len)
- {
- /* Large request, shortcut buffer */
-
- base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
-
- g_input_stream_read_async (base_stream,
- (char *)buffer + data->bytes_read,
- count,
- io_priority, cancellable,
- large_read_callback,
- simple);
- }
- else
- {
- class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
- class->fill_async (bstream, priv->len, io_priority, cancellable,
- read_fill_buffer_callback, simple);
- }
-}
-
-static gssize
-g_buffered_input_stream_read_finish (GInputStream *stream,
- GAsyncResult *result,
- GError **error)
-{
- GSimpleAsyncResult *simple;
- ReadAsyncData *data;
-
- simple = G_SIMPLE_ASYNC_RESULT (result);
-
- g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_read_async);
-
- data = g_simple_async_result_get_op_res_gpointer (simple);
-
- return data->bytes_read;
-}
-
-typedef struct
-{
gssize bytes_skipped;
gssize count;
} SkipAsyncData;
projects / platform / upstream / glib.git / blobdiff