1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
4 * Copyright (C) 2007 Jürg Billeter
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General
17 * Public License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
19 * Boston, MA 02111-1307, USA.
21 * Author: Christian Kellner <gicmo@gnome.org>
25 #include "gbufferedinputstream.h"
26 #include "ginputstream.h"
27 #include "gcancellable.h"
28 #include "gasyncresult.h"
29 #include "gsimpleasyncresult.h"
37 * SECTION:gbufferedinputstream
38 * @short_description: Buffered Input Stream
40 * @see_also: #GFilterInputStream, #GInputStream
42 * Buffered input stream implements #GFilterInputStream and provides
45 * By default, #GBufferedInputStream's buffer size is set at 4 kilobytes.
47 * To create a buffered input stream, use g_buffered_input_stream_new(),
48 * or g_buffered_input_stream_new_sized() to specify the buffer's size at
51 * To get the size of a buffer within a buffered input stream, use
52 * g_buffered_input_stream_get_buffer_size(). To change the size of a
53 * buffered input stream's buffer, use
54 * g_buffered_input_stream_set_buffer_size(). Note that the buffer's size
55 * cannot be reduced below the size of the data within the buffer.
61 #define DEFAULT_BUFFER_SIZE 4096
63 struct _GBufferedInputStreamPrivate {
68 GAsyncReadyCallback outstanding_callback;
76 static void g_buffered_input_stream_set_property (GObject *object,
81 static void g_buffered_input_stream_get_property (GObject *object,
85 static void g_buffered_input_stream_finalize (GObject *object);
88 static gssize g_buffered_input_stream_skip (GInputStream *stream,
90 GCancellable *cancellable,
92 static void g_buffered_input_stream_skip_async (GInputStream *stream,
95 GCancellable *cancellable,
96 GAsyncReadyCallback callback,
98 static gssize g_buffered_input_stream_skip_finish (GInputStream *stream,
101 static gssize g_buffered_input_stream_read (GInputStream *stream,
104 GCancellable *cancellable,
106 static void g_buffered_input_stream_read_async (GInputStream *stream,
110 GCancellable *cancellable,
111 GAsyncReadyCallback callback,
113 static gssize g_buffered_input_stream_read_finish (GInputStream *stream,
114 GAsyncResult *result,
116 static gssize g_buffered_input_stream_real_fill (GBufferedInputStream *stream,
118 GCancellable *cancellable,
120 static void g_buffered_input_stream_real_fill_async (GBufferedInputStream *stream,
123 GCancellable *cancellable,
124 GAsyncReadyCallback callback,
126 static gssize g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
127 GAsyncResult *result,
130 static void compact_buffer (GBufferedInputStream *stream);
132 G_DEFINE_TYPE (GBufferedInputStream,
133 g_buffered_input_stream,
134 G_TYPE_FILTER_INPUT_STREAM)
138 g_buffered_input_stream_class_init (GBufferedInputStreamClass *klass)
140 GObjectClass *object_class;
141 GInputStreamClass *istream_class;
142 GBufferedInputStreamClass *bstream_class;
144 g_type_class_add_private (klass, sizeof (GBufferedInputStreamPrivate));
146 object_class = G_OBJECT_CLASS (klass);
147 object_class->get_property = g_buffered_input_stream_get_property;
148 object_class->set_property = g_buffered_input_stream_set_property;
149 object_class->finalize = g_buffered_input_stream_finalize;
151 istream_class = G_INPUT_STREAM_CLASS (klass);
152 istream_class->skip = g_buffered_input_stream_skip;
153 istream_class->skip_async = g_buffered_input_stream_skip_async;
154 istream_class->skip_finish = g_buffered_input_stream_skip_finish;
155 istream_class->read_fn = g_buffered_input_stream_read;
156 istream_class->read_async = g_buffered_input_stream_read_async;
157 istream_class->read_finish = g_buffered_input_stream_read_finish;
159 bstream_class = G_BUFFERED_INPUT_STREAM_CLASS (klass);
160 bstream_class->fill = g_buffered_input_stream_real_fill;
161 bstream_class->fill_async = g_buffered_input_stream_real_fill_async;
162 bstream_class->fill_finish = g_buffered_input_stream_real_fill_finish;
164 g_object_class_install_property (object_class,
166 g_param_spec_uint ("buffer-size",
168 P_("The size of the backend buffer"),
172 G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
173 G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
179 * g_buffered_input_stream_get_buffer_size:
180 * @stream: #GBufferedInputStream.
182 * Gets the size of the input buffer.
184 * Returns: the current buffer size.
187 g_buffered_input_stream_get_buffer_size (GBufferedInputStream *stream)
189 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), 0);
191 return stream->priv->len;
195 * g_buffered_input_stream_set_buffer_size:
196 * @stream: #GBufferedInputStream.
199 * Sets the size of the internal buffer of @stream to @size, or to the
200 * size of the contents of the buffer. The buffer can never be resized
201 * smaller than its current contents.
204 g_buffered_input_stream_set_buffer_size (GBufferedInputStream *stream,
207 GBufferedInputStreamPrivate *priv;
211 g_return_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream));
215 if (priv->len == size)
220 in_buffer = priv->end - priv->pos;
222 /* Never resize smaller than current buffer contents */
223 size = MAX (size, in_buffer);
225 buffer = g_malloc (size);
226 memcpy (buffer, priv->buffer + priv->pos, in_buffer);
229 priv->end = in_buffer;
230 g_free (priv->buffer);
231 priv->buffer = buffer;
238 priv->buffer = g_malloc (size);
241 g_object_notify (G_OBJECT (stream), "buffer-size");
245 g_buffered_input_stream_set_property (GObject *object,
250 GBufferedInputStreamPrivate *priv;
251 GBufferedInputStream *bstream;
253 bstream = G_BUFFERED_INPUT_STREAM (object);
254 priv = bstream->priv;
259 g_buffered_input_stream_set_buffer_size (bstream, g_value_get_uint (value));
263 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
270 g_buffered_input_stream_get_property (GObject *object,
275 GBufferedInputStreamPrivate *priv;
276 GBufferedInputStream *bstream;
278 bstream = G_BUFFERED_INPUT_STREAM (object);
279 priv = bstream->priv;
284 g_value_set_uint (value, priv->len);
288 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
294 g_buffered_input_stream_finalize (GObject *object)
296 GBufferedInputStreamPrivate *priv;
297 GBufferedInputStream *stream;
299 stream = G_BUFFERED_INPUT_STREAM (object);
302 g_free (priv->buffer);
304 G_OBJECT_CLASS (g_buffered_input_stream_parent_class)->finalize (object);
308 g_buffered_input_stream_init (GBufferedInputStream *stream)
310 stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
311 G_TYPE_BUFFERED_INPUT_STREAM,
312 GBufferedInputStreamPrivate);
317 * g_buffered_input_stream_new:
318 * @base_stream: a #GInputStream.
320 * Creates a new #GInputStream from the given @base_stream, with
321 * a buffer set to the default size (4 kilobytes).
323 * Returns: a #GInputStream for the given @base_stream.
326 g_buffered_input_stream_new (GInputStream *base_stream)
328 GInputStream *stream;
330 g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
332 stream = g_object_new (G_TYPE_BUFFERED_INPUT_STREAM,
333 "base-stream", base_stream,
340 * g_buffered_input_stream_new_sized:
341 * @base_stream: a #GInputStream.
344 * Creates a new #GBufferedInputStream from the given @base_stream,
345 * with a buffer set to @size.
347 * Returns: a #GInputStream.
350 g_buffered_input_stream_new_sized (GInputStream *base_stream,
353 GInputStream *stream;
355 g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
357 stream = g_object_new (G_TYPE_BUFFERED_INPUT_STREAM,
358 "base-stream", base_stream,
359 "buffer-size", (guint)size,
366 * g_buffered_input_stream_fill:
367 * @stream: #GBufferedInputStream.
368 * @count: the number of bytes that will be read from the stream.
369 * @cancellable: optional #GCancellable object, %NULL to ignore.
370 * @error: location to store the error occuring, or %NULL to ignore.
372 * Tries to read @count bytes from the stream into the buffer.
373 * Will block during this read.
375 * If @count is zero, returns zero and does nothing. A value of @count
376 * larger than %G_MAXSSIZE will cause a %G_IO_ERROR_INVALID_ARGUMENT error.
378 * On success, the number of bytes read into the buffer is returned.
379 * It is not an error if this is not the same as the requested size, as it
380 * can happen e.g. near the end of a file. Zero is returned on end of file
381 * (or if @count is zero), but never otherwise.
383 * If @count is -1 then the attempted read size is equal to the number of
384 * bytes that are required to fill the buffer.
386 * If @cancellable is not %NULL, then the operation can be cancelled by
387 * triggering the cancellable object from another thread. If the operation
388 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
389 * operation was partially finished when the operation was cancelled the
390 * partial result will be returned, without an error.
392 * On error -1 is returned and @error is set accordingly.
394 * For the asynchronous, non-blocking, version of this function, see
395 * g_buffered_input_stream_fill_async().
397 * Returns: the number of bytes read into @stream's buffer, up to @count,
401 g_buffered_input_stream_fill (GBufferedInputStream *stream,
403 GCancellable *cancellable,
406 GBufferedInputStreamClass *class;
407 GInputStream *input_stream;
410 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
412 input_stream = G_INPUT_STREAM (stream);
416 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
417 _("Too large count value passed to %s"), G_STRFUNC);
421 if (!g_input_stream_set_pending (input_stream, error))
425 g_cancellable_push_current (cancellable);
427 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
428 res = class->fill (stream, count, cancellable, error);
431 g_cancellable_pop_current (cancellable);
433 g_input_stream_clear_pending (input_stream);
439 async_fill_callback_wrapper (GObject *source_object,
443 GBufferedInputStream *stream = G_BUFFERED_INPUT_STREAM (source_object);
445 g_input_stream_clear_pending (G_INPUT_STREAM (stream));
446 (*stream->priv->outstanding_callback) (source_object, res, user_data);
447 g_object_unref (stream);
451 * g_buffered_input_stream_fill_async:
452 * @stream: #GBufferedInputStream.
453 * @count: the number of bytes that will be read from the stream.
454 * @io_priority: the <link linkend="io-priority">I/O priority</link>
456 * @cancellable: optional #GCancellable object
457 * @callback: a #GAsyncReadyCallback.
458 * @user_data: a #gpointer.
460 * Reads data into @stream's buffer asynchronously, up to @count size.
461 * @io_priority can be used to prioritize reads. For the synchronous
462 * version of this function, see g_buffered_input_stream_fill().
464 * If @count is -1 then the attempted read size is equal to the number
465 * of bytes that are required to fill the buffer.
468 g_buffered_input_stream_fill_async (GBufferedInputStream *stream,
471 GCancellable *cancellable,
472 GAsyncReadyCallback callback,
475 GBufferedInputStreamClass *class;
476 GSimpleAsyncResult *simple;
477 GError *error = NULL;
479 g_return_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream));
483 simple = g_simple_async_result_new (G_OBJECT (stream),
486 g_buffered_input_stream_fill_async);
487 g_simple_async_result_complete_in_idle (simple);
488 g_object_unref (simple);
494 g_simple_async_report_error_in_idle (G_OBJECT (stream),
497 G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
498 _("Too large count value passed to %s"),
503 if (!g_input_stream_set_pending (G_INPUT_STREAM (stream), &error))
505 g_simple_async_report_gerror_in_idle (G_OBJECT (stream),
509 g_error_free (error);
513 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
515 stream->priv->outstanding_callback = callback;
516 g_object_ref (stream);
517 class->fill_async (stream, count, io_priority, cancellable,
518 async_fill_callback_wrapper, user_data);
522 * g_buffered_input_stream_fill_finish:
523 * @stream: a #GBufferedInputStream.
524 * @result: a #GAsyncResult.
527 * Finishes an asynchronous read.
529 * Returns: a #gssize of the read stream, or %-1 on an error.
532 g_buffered_input_stream_fill_finish (GBufferedInputStream *stream,
533 GAsyncResult *result,
536 GSimpleAsyncResult *simple;
537 GBufferedInputStreamClass *class;
539 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
540 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), -1);
542 if (G_IS_SIMPLE_ASYNC_RESULT (result))
544 simple = G_SIMPLE_ASYNC_RESULT (result);
545 if (g_simple_async_result_propagate_error (simple, error))
548 /* Special case read of 0 bytes */
549 if (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_fill_async)
553 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
554 return class->fill_finish (stream, result, error);
558 * g_buffered_input_stream_get_available:
559 * @stream: #GBufferedInputStream.
561 * Gets the size of the available data within the stream.
563 * Returns: size of the available stream.
566 g_buffered_input_stream_get_available (GBufferedInputStream *stream)
568 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
570 return stream->priv->end - stream->priv->pos;
574 * g_buffered_input_stream_peek:
575 * @stream: a #GBufferedInputStream.
576 * @buffer: a pointer to an allocated chunk of memory.
580 * Peeks in the buffer, copying data of size @count into @buffer,
581 * offset @offset bytes.
583 * Returns: a #gsize of the number of bytes peeked, or %-1 on error.
586 g_buffered_input_stream_peek (GBufferedInputStream *stream,
594 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
595 g_return_val_if_fail (buffer != NULL, -1);
597 available = g_buffered_input_stream_get_available (stream);
599 if (offset > available)
602 end = MIN (offset + count, available);
603 count = end - offset;
605 memcpy (buffer, stream->priv->buffer + stream->priv->pos + offset, count);
610 * g_buffered_input_stream_peek_buffer:
611 * @stream: a #GBufferedInputStream.
612 * @count: a #gsize to get the number of bytes available in the buffer.
614 * Returns the buffer with the currently available bytes. The returned
615 * buffer must not be modified and will become invalid when reading from
616 * the stream or filling the buffer.
618 * Returns: read-only buffer
621 g_buffered_input_stream_peek_buffer (GBufferedInputStream *stream,
624 GBufferedInputStreamPrivate *priv;
626 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), NULL);
631 *count = priv->end - priv->pos;
633 return priv->buffer + priv->pos;
637 compact_buffer (GBufferedInputStream *stream)
639 GBufferedInputStreamPrivate *priv;
644 current_size = priv->end - priv->pos;
646 g_memmove (priv->buffer, priv->buffer + priv->pos, current_size);
649 priv->end = current_size;
653 g_buffered_input_stream_real_fill (GBufferedInputStream *stream,
655 GCancellable *cancellable,
658 GBufferedInputStreamPrivate *priv;
659 GInputStream *base_stream;
668 in_buffer = priv->end - priv->pos;
670 /* Never fill more than can fit in the buffer */
671 count = MIN (count, priv->len - in_buffer);
673 /* If requested length does not fit at end, compact */
674 if (priv->len - priv->end < count)
675 compact_buffer (stream);
677 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
678 nread = g_input_stream_read (base_stream,
679 priv->buffer + priv->end,
691 g_buffered_input_stream_skip (GInputStream *stream,
693 GCancellable *cancellable,
696 GBufferedInputStream *bstream;
697 GBufferedInputStreamPrivate *priv;
698 GBufferedInputStreamClass *class;
699 GInputStream *base_stream;
700 gsize available, bytes_skipped;
703 bstream = G_BUFFERED_INPUT_STREAM (stream);
704 priv = bstream->priv;
706 available = priv->end - priv->pos;
708 if (count <= available)
714 /* Full request not available, skip all currently available and
715 * request refill for more
720 bytes_skipped = available;
723 if (bytes_skipped > 0)
724 error = NULL; /* Ignore further errors if we already read some data */
726 if (count > priv->len)
728 /* Large request, shortcut buffer */
730 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
732 nread = g_input_stream_skip (base_stream,
737 if (nread < 0 && bytes_skipped == 0)
741 bytes_skipped += nread;
743 return bytes_skipped;
746 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
747 nread = class->fill (bstream, priv->len, cancellable, error);
751 if (bytes_skipped == 0)
754 return bytes_skipped;
757 available = priv->end - priv->pos;
758 count = MIN (count, available);
760 bytes_skipped += count;
763 return bytes_skipped;
767 g_buffered_input_stream_read (GInputStream *stream,
770 GCancellable *cancellable,
773 GBufferedInputStream *bstream;
774 GBufferedInputStreamPrivate *priv;
775 GBufferedInputStreamClass *class;
776 GInputStream *base_stream;
777 gsize available, bytes_read;
780 bstream = G_BUFFERED_INPUT_STREAM (stream);
781 priv = bstream->priv;
783 available = priv->end - priv->pos;
785 if (count <= available)
787 memcpy (buffer, priv->buffer + priv->pos, count);
792 /* Full request not available, read all currently availbile and request refill for more */
794 memcpy (buffer, priv->buffer + priv->pos, available);
797 bytes_read = available;
801 error = NULL; /* Ignore further errors if we already read some data */
803 if (count > priv->len)
805 /* Large request, shortcut buffer */
807 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
809 nread = g_input_stream_read (base_stream,
810 (char *)buffer + bytes_read,
815 if (nread < 0 && bytes_read == 0)
824 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
825 nread = class->fill (bstream, priv->len, cancellable, error);
834 available = priv->end - priv->pos;
835 count = MIN (count, available);
837 memcpy ((char *)buffer + bytes_read, (char *)priv->buffer + priv->pos, count);
845 * g_buffered_input_stream_read_byte:
846 * @stream: #GBufferedInputStream.
847 * @cancellable: optional #GCancellable object, %NULL to ignore.
848 * @error: location to store the error occuring, or %NULL to ignore.
850 * Tries to read a single byte from the stream or the buffer. Will block
853 * On success, the byte read from the stream is returned. On end of stream
854 * -1 is returned but it's not an exceptional error and @error is not set.
856 * If @cancellable is not %NULL, then the operation can be cancelled by
857 * triggering the cancellable object from another thread. If the operation
858 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
859 * operation was partially finished when the operation was cancelled the
860 * partial result will be returned, without an error.
862 * On error -1 is returned and @error is set accordingly.
864 * Returns: the byte read from the @stream, or -1 on end of stream or error.
867 g_buffered_input_stream_read_byte (GBufferedInputStream *stream,
868 GCancellable *cancellable,
871 GBufferedInputStreamPrivate *priv;
872 GBufferedInputStreamClass *class;
873 GInputStream *input_stream;
877 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
880 input_stream = G_INPUT_STREAM (stream);
882 if (g_input_stream_is_closed (input_stream))
884 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
885 _("Stream is already closed"));
889 if (!g_input_stream_set_pending (input_stream, error))
892 available = priv->end - priv->pos;
896 g_input_stream_clear_pending (input_stream);
897 return priv->buffer[priv->pos++];
900 /* Byte not available, request refill for more */
903 g_cancellable_push_current (cancellable);
908 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
909 nread = class->fill (stream, priv->len, cancellable, error);
912 g_cancellable_pop_current (cancellable);
914 g_input_stream_clear_pending (input_stream);
917 return -1; /* error or end of stream */
919 return priv->buffer[priv->pos++];
922 /* ************************** */
923 /* Async stuff implementation */
924 /* ************************** */
927 fill_async_callback (GObject *source_object,
928 GAsyncResult *result,
933 GSimpleAsyncResult *simple;
938 res = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
941 g_simple_async_result_set_op_res_gssize (simple, res);
944 g_simple_async_result_set_from_error (simple, error);
945 g_error_free (error);
949 GBufferedInputStreamPrivate *priv;
952 object = g_async_result_get_source_object (G_ASYNC_RESULT (simple));
953 priv = G_BUFFERED_INPUT_STREAM (object)->priv;
955 g_assert_cmpint (priv->end + res, <=, priv->len);
958 g_object_unref (object);
961 /* Complete immediately, not in idle, since we're already in a mainloop callout */
962 g_simple_async_result_complete (simple);
963 g_object_unref (simple);
967 g_buffered_input_stream_real_fill_async (GBufferedInputStream *stream,
970 GCancellable *cancellable,
971 GAsyncReadyCallback callback,
974 GBufferedInputStreamPrivate *priv;
975 GInputStream *base_stream;
976 GSimpleAsyncResult *simple;
984 in_buffer = priv->end - priv->pos;
986 /* Never fill more than can fit in the buffer */
987 count = MIN (count, priv->len - in_buffer);
989 /* If requested length does not fit at end, compact */
990 if (priv->len - priv->end < count)
991 compact_buffer (stream);
993 simple = g_simple_async_result_new (G_OBJECT (stream),
995 g_buffered_input_stream_real_fill_async);
997 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
998 g_input_stream_read_async (base_stream,
999 priv->buffer + priv->end,
1003 fill_async_callback,
1008 g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
1009 GAsyncResult *result,
1012 GSimpleAsyncResult *simple;
1015 simple = G_SIMPLE_ASYNC_RESULT (result);
1016 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_real_fill_async);
1018 nread = g_simple_async_result_get_op_res_gssize (simple);
1029 free_read_async_data (gpointer _data)
1031 ReadAsyncData *data = _data;
1032 g_slice_free (ReadAsyncData, data);
1036 large_read_callback (GObject *source_object,
1037 GAsyncResult *result,
1040 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1041 ReadAsyncData *data;
1045 data = g_simple_async_result_get_op_res_gpointer (simple);
1048 nread = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
1051 /* Only report the error if we've not already read some data */
1052 if (nread < 0 && data->bytes_read == 0)
1053 g_simple_async_result_set_from_error (simple, error);
1056 data->bytes_read += nread;
1059 g_error_free (error);
1061 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1062 g_simple_async_result_complete (simple);
1063 g_object_unref (simple);
1067 read_fill_buffer_callback (GObject *source_object,
1068 GAsyncResult *result,
1071 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1072 GBufferedInputStream *bstream;
1073 GBufferedInputStreamPrivate *priv;
1074 ReadAsyncData *data;
1079 bstream = G_BUFFERED_INPUT_STREAM (source_object);
1080 priv = bstream->priv;
1082 data = g_simple_async_result_get_op_res_gpointer (simple);
1085 nread = g_buffered_input_stream_fill_finish (bstream,
1088 if (nread < 0 && data->bytes_read == 0)
1089 g_simple_async_result_set_from_error (simple, error);
1094 available = priv->end - priv->pos;
1095 data->count = MIN (data->count, available);
1097 memcpy ((char *)data->buffer + data->bytes_read, (char *)priv->buffer + priv->pos, data->count);
1098 data->bytes_read += data->count;
1099 priv->pos += data->count;
1103 g_error_free (error);
1105 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1106 g_simple_async_result_complete (simple);
1107 g_object_unref (simple);
1111 g_buffered_input_stream_read_async (GInputStream *stream,
1115 GCancellable *cancellable,
1116 GAsyncReadyCallback callback,
1119 GBufferedInputStream *bstream;
1120 GBufferedInputStreamPrivate *priv;
1121 GBufferedInputStreamClass *class;
1122 GInputStream *base_stream;
1124 GSimpleAsyncResult *simple;
1125 ReadAsyncData *data;
1127 bstream = G_BUFFERED_INPUT_STREAM (stream);
1128 priv = bstream->priv;
1130 data = g_slice_new (ReadAsyncData);
1131 data->buffer = buffer;
1132 data->bytes_read = 0;
1133 simple = g_simple_async_result_new (G_OBJECT (stream),
1134 callback, user_data,
1135 g_buffered_input_stream_read_async);
1136 g_simple_async_result_set_op_res_gpointer (simple, data, free_read_async_data);
1138 available = priv->end - priv->pos;
1140 if (count <= available)
1142 memcpy (buffer, priv->buffer + priv->pos, count);
1144 data->bytes_read = count;
1146 g_simple_async_result_complete_in_idle (simple);
1147 g_object_unref (simple);
1152 /* Full request not available, read all currently availbile and request refill for more */
1154 memcpy (buffer, priv->buffer + priv->pos, available);
1160 data->bytes_read = available;
1161 data->count = count;
1163 if (count > priv->len)
1165 /* Large request, shortcut buffer */
1167 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
1169 g_input_stream_read_async (base_stream,
1170 (char *)buffer + data->bytes_read,
1172 io_priority, cancellable,
1173 large_read_callback,
1178 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
1179 class->fill_async (bstream, priv->len, io_priority, cancellable,
1180 read_fill_buffer_callback, simple);
1185 g_buffered_input_stream_read_finish (GInputStream *stream,
1186 GAsyncResult *result,
1189 GSimpleAsyncResult *simple;
1190 ReadAsyncData *data;
1192 simple = G_SIMPLE_ASYNC_RESULT (result);
1194 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_read_async);
1196 data = g_simple_async_result_get_op_res_gpointer (simple);
1198 return data->bytes_read;
1202 gssize bytes_skipped;
1207 free_skip_async_data (gpointer _data)
1209 SkipAsyncData *data = _data;
1210 g_slice_free (SkipAsyncData, data);
1214 large_skip_callback (GObject *source_object,
1215 GAsyncResult *result,
1218 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1219 SkipAsyncData *data;
1223 data = g_simple_async_result_get_op_res_gpointer (simple);
1226 nread = g_input_stream_skip_finish (G_INPUT_STREAM (source_object),
1229 /* Only report the error if we've not already read some data */
1230 if (nread < 0 && data->bytes_skipped == 0)
1231 g_simple_async_result_set_from_error (simple, error);
1234 data->bytes_skipped += nread;
1237 g_error_free (error);
1239 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1240 g_simple_async_result_complete (simple);
1241 g_object_unref (simple);
1245 skip_fill_buffer_callback (GObject *source_object,
1246 GAsyncResult *result,
1249 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1250 GBufferedInputStream *bstream;
1251 GBufferedInputStreamPrivate *priv;
1252 SkipAsyncData *data;
1257 bstream = G_BUFFERED_INPUT_STREAM (source_object);
1258 priv = bstream->priv;
1260 data = g_simple_async_result_get_op_res_gpointer (simple);
1263 nread = g_buffered_input_stream_fill_finish (bstream,
1266 if (nread < 0 && data->bytes_skipped == 0)
1267 g_simple_async_result_set_from_error (simple, error);
1272 available = priv->end - priv->pos;
1273 data->count = MIN (data->count, available);
1275 data->bytes_skipped += data->count;
1276 priv->pos += data->count;
1280 g_error_free (error);
1282 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1283 g_simple_async_result_complete (simple);
1284 g_object_unref (simple);
1288 g_buffered_input_stream_skip_async (GInputStream *stream,
1291 GCancellable *cancellable,
1292 GAsyncReadyCallback callback,
1295 GBufferedInputStream *bstream;
1296 GBufferedInputStreamPrivate *priv;
1297 GBufferedInputStreamClass *class;
1298 GInputStream *base_stream;
1300 GSimpleAsyncResult *simple;
1301 SkipAsyncData *data;
1303 bstream = G_BUFFERED_INPUT_STREAM (stream);
1304 priv = bstream->priv;
1306 data = g_slice_new (SkipAsyncData);
1307 data->bytes_skipped = 0;
1308 simple = g_simple_async_result_new (G_OBJECT (stream),
1309 callback, user_data,
1310 g_buffered_input_stream_skip_async);
1311 g_simple_async_result_set_op_res_gpointer (simple, data, free_skip_async_data);
1313 available = priv->end - priv->pos;
1315 if (count <= available)
1318 data->bytes_skipped = count;
1320 g_simple_async_result_complete_in_idle (simple);
1321 g_object_unref (simple);
1326 /* Full request not available, skip all currently availbile and request refill for more */
1333 data->bytes_skipped = available;
1334 data->count = count;
1336 if (count > priv->len)
1338 /* Large request, shortcut buffer */
1340 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
1342 g_input_stream_skip_async (base_stream,
1344 io_priority, cancellable,
1345 large_skip_callback,
1350 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
1351 class->fill_async (bstream, priv->len, io_priority, cancellable,
1352 skip_fill_buffer_callback, simple);
1357 g_buffered_input_stream_skip_finish (GInputStream *stream,
1358 GAsyncResult *result,
1361 GSimpleAsyncResult *simple;
1362 SkipAsyncData *data;
1364 simple = G_SIMPLE_ASYNC_RESULT (result);
1366 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_skip_async);
1368 data = g_simple_async_result_get_op_res_gpointer (simple);
1370 return data->bytes_skipped;
1374 #define __G_BUFFERED_INPUT_STREAM_C__
1375 #include "gioaliasdef.c"