* Author: Alexander Larsson <alexl@redhat.com>
*/
-#include <config.h>
+#include "config.h"
#include <glib.h>
#include <gfileinputstream.h>
#include <gseekable.h>
#include "gsimpleasyncresult.h"
+#include "gcancellable.h"
+#include "gasyncresult.h"
+#include "gioerror.h"
#include "glibintl.h"
#include "gioalias.h"
/**
* SECTION:gfileinputstream
* @short_description: File input streaming operations
+ * @include: gio/gio.h
* @see_also: #GInputStream, #GDataInputStream, #GSeekable
- *
- *
*
+ * GFileInputStream provides input streams that take their
+ * content from a file.
+ *
+ * GFileInputStream implements #GSeekable, which allows the input
+ * stream to jump to arbitrary positions in the file, provided the
+ * filesystem of the file allows it. To find the position of a file
+ * input stream, use g_seekable_tell(). To find out if a file input
+ * stream supports seeking, use g_seekable_stream_can_seek().
+ * To position a file input stream, use g_seekable_seek().
**/
static void g_file_input_stream_seekable_iface_init (GSeekableIface *iface);
GCancellable *cancellable,
GError **error);
static void g_file_input_stream_real_query_info_async (GFileInputStream *stream,
- char *attributes,
+ const char *attributes,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
iface->can_seek = g_file_input_stream_seekable_can_seek;
iface->seek = g_file_input_stream_seekable_seek;
iface->can_truncate = g_file_input_stream_seekable_can_truncate;
- iface->truncate = g_file_input_stream_seekable_truncate;
+ iface->truncate_fn = g_file_input_stream_seekable_truncate;
}
static void
* @error: a #GError location to store the error occuring, or %NULL to
* ignore.
*
- * Queries a file input stream the given @attributes.his function blocks
+ * Queries a file input stream the given @attributes. This function blocks
* while querying the stream. For the asynchronous (non-blocking) version
* of this function, see g_file_input_stream_query_info_async(). While the
* stream is blocked, the stream will set the pending flag internally, and
**/
GFileInfo *
g_file_input_stream_query_info (GFileInputStream *stream,
- char *attributes,
+ const char *attributes,
GCancellable *cancellable,
GError **error)
{
input_stream = G_INPUT_STREAM (stream);
- if (g_input_stream_is_closed (input_stream))
- {
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
- _("Stream is already closed"));
- return NULL;
- }
-
- if (g_input_stream_has_pending (input_stream))
- {
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_PENDING,
- _("Stream has outstanding operation"));
- return NULL;
- }
+ if (!g_input_stream_set_pending (input_stream, error))
+ return NULL;
info = NULL;
- g_input_stream_set_pending (input_stream, TRUE);
-
if (cancellable)
- g_push_current_cancellable (cancellable);
+ g_cancellable_push_current (cancellable);
class = G_FILE_INPUT_STREAM_GET_CLASS (stream);
if (class->query_info)
info = class->query_info (stream, attributes, cancellable, error);
else
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
- _("Stream doesn't support query_info"));
+ g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
+ _("Stream doesn't support query_info"));
if (cancellable)
- g_pop_current_cancellable (cancellable);
+ g_cancellable_pop_current (cancellable);
- g_input_stream_set_pending (input_stream, FALSE);
+ g_input_stream_clear_pending (input_stream);
return info;
}
{
GFileInputStream *stream = G_FILE_INPUT_STREAM (source_object);
- g_input_stream_set_pending (G_INPUT_STREAM (stream), FALSE);
+ g_input_stream_clear_pending (G_INPUT_STREAM (stream));
if (stream->priv->outstanding_callback)
(*stream->priv->outstanding_callback) (source_object, res, user_data);
g_object_unref (stream);
* @callback: callback to call when the request is satisfied
* @user_data: the data to pass to callback function
*
- * Queries the stream information asynchronously. For the synchronous
- * version of this function, see g_file_input_stream_query_info().
+ * Queries the stream information asynchronously.
+ * When the operation is finished @callback will be called.
+ * You can then call g_file_input_stream_query_info_finish()
+ * to get the result of the operation.
+ *
+ * For the synchronous version of this function,
+ * see g_file_input_stream_query_info().
*
* If @cancellable is not %NULL, then the operation can be cancelled by
* triggering the cancellable object from another thread. If the operation
**/
void
g_file_input_stream_query_info_async (GFileInputStream *stream,
- char *attributes,
+ const char *attributes,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
{
GFileInputStreamClass *klass;
GInputStream *input_stream;
+ GError *error = NULL;
g_return_if_fail (G_IS_FILE_INPUT_STREAM (stream));
input_stream = G_INPUT_STREAM (stream);
-
- if (g_input_stream_is_closed (input_stream))
- {
- g_simple_async_report_error_in_idle (G_OBJECT (stream),
- callback,
- user_data,
- G_IO_ERROR, G_IO_ERROR_CLOSED,
- _("Stream is already closed"));
- return;
- }
- if (g_input_stream_has_pending (input_stream))
+ if (!g_input_stream_set_pending (input_stream, &error))
{
- g_simple_async_report_error_in_idle (G_OBJECT (stream),
- callback,
- user_data,
- G_IO_ERROR, G_IO_ERROR_PENDING,
- _("Stream has outstanding operation"));
+ g_simple_async_report_gerror_in_idle (G_OBJECT (stream),
+ callback,
+ user_data,
+ error);
+ g_error_free (error);
return;
}
klass = G_FILE_INPUT_STREAM_GET_CLASS (stream);
- g_input_stream_set_pending (input_stream, TRUE);
stream->priv->outstanding_callback = callback;
g_object_ref (stream);
klass->query_info_async (stream, attributes, io_priority, cancellable,
return class->query_info_finish (stream, result, error);
}
-/**
- * g_file_input_stream_tell:
- * @stream: a #GFileInputStream.
- *
- * Gets the current position in the stream.
- *
- * Returns: a #goffset with the position in the stream.
- **/
-goffset
+static goffset
g_file_input_stream_tell (GFileInputStream *stream)
{
GFileInputStreamClass *class;
return g_file_input_stream_tell (G_FILE_INPUT_STREAM (seekable));
}
-/**
- * g_file_input_stream_can_seek:
- * @stream: a #GFileInputStream.
- *
- * Checks if a file input stream can be seeked.
- *
- * Returns: %TRUE if stream can be seeked. %FALSE otherwise.
- **/
-gboolean
+static gboolean
g_file_input_stream_can_seek (GFileInputStream *stream)
{
GFileInputStreamClass *class;
return g_file_input_stream_can_seek (G_FILE_INPUT_STREAM (seekable));
}
-/**
- * g_file_input_stream_seek:
- * @stream: a #GFileInputStream.
- * @offset: a #goffset to seek.
- * @type: a #GSeekType.
- * @cancellable: optional #GCancellable object, %NULL to ignore.
- * @error: a #GError location to store the error occuring, or
- * %NULL to ignore.
- *
- * Seeks in the file input stream.
- *
- * If @cancellable is not %NULL, then the operation can be cancelled by
- * triggering the cancellable object from another thread. If the operation
- * was cancelled, the error %G_IO_ERROR_CANCELLED will be set.
- *
- * Returns: %TRUE if the stream was successfully seeked to the position.
- * %FALSE on error.
- **/
-gboolean
+static gboolean
g_file_input_stream_seek (GFileInputStream *stream,
goffset offset,
GSeekType type,
input_stream = G_INPUT_STREAM (stream);
class = G_FILE_INPUT_STREAM_GET_CLASS (stream);
- if (g_input_stream_is_closed (input_stream))
- {
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
- _("Stream is already closed"));
- return FALSE;
- }
-
- if (g_input_stream_has_pending (input_stream))
- {
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_PENDING,
- _("Stream has outstanding operation"));
- return FALSE;
- }
-
if (!class->seek)
{
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
- _("Seek not supported on stream"));
+ g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
+ _("Seek not supported on stream"));
return FALSE;
}
- g_input_stream_set_pending (input_stream, TRUE);
+ if (!g_input_stream_set_pending (input_stream, error))
+ return FALSE;
if (cancellable)
- g_push_current_cancellable (cancellable);
+ g_cancellable_push_current (cancellable);
res = class->seek (stream, offset, type, cancellable, error);
if (cancellable)
- g_pop_current_cancellable (cancellable);
+ g_cancellable_pop_current (cancellable);
- g_input_stream_set_pending (input_stream, FALSE);
+ g_input_stream_clear_pending (input_stream);
return res;
}
GCancellable *cancellable,
GError **error)
{
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
- _("Truncate not allowed on input stream"));
+ g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
+ _("Truncate not allowed on input stream"));
return FALSE;
}
if (class->query_info)
info = class->query_info (G_FILE_INPUT_STREAM (object), data->attributes, cancellable, &error);
else
- g_set_error (&error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
- _("Stream doesn't support query_info"));
+ g_set_error_literal (&error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
+ _("Stream doesn't support query_info"));
if (info == NULL)
{
static void
g_file_input_stream_real_query_info_async (GFileInputStream *stream,
- char *attributes,
+ const char *attributes,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
QueryInfoAsyncData *data;
- g_assert (g_simple_async_result_get_source_tag (simple) == g_file_input_stream_real_query_info_async);
+ g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_input_stream_real_query_info_async);
data = g_simple_async_result_get_op_res_gpointer (simple);
if (data->info)
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