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 @cancellable is not %NULL, then the operation can be cancelled by
384 * triggering the cancellable object from another thread. If the operation
385 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
386 * operation was partially finished when the operation was cancelled the
387 * partial result will be returned, without an error.
389 * On error -1 is returned and @error is set accordingly.
391 * For the asynchronous, non-blocking, version of this function, see
392 * g_buffered_input_stream_fill_async().
394 * Returns: the number of bytes read into @stream's buffer, up to @count,
398 g_buffered_input_stream_fill (GBufferedInputStream *stream,
400 GCancellable *cancellable,
403 GBufferedInputStreamClass *class;
404 GInputStream *input_stream;
407 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
409 input_stream = G_INPUT_STREAM (stream);
411 if (!g_input_stream_set_pending (input_stream, error))
415 g_cancellable_push_current (cancellable);
417 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
418 res = class->fill (stream, count, cancellable, error);
421 g_cancellable_pop_current (cancellable);
423 g_input_stream_clear_pending (input_stream);
429 async_fill_callback_wrapper (GObject *source_object,
433 GBufferedInputStream *stream = G_BUFFERED_INPUT_STREAM (source_object);
435 g_input_stream_clear_pending (G_INPUT_STREAM (stream));
436 (*stream->priv->outstanding_callback) (source_object, res, user_data);
437 g_object_unref (stream);
441 * g_buffered_input_stream_fill_async:
442 * @stream: #GBufferedInputStream.
444 * @io_priority: the <link linkend="io-priority">I/O priority</link>
446 * @cancellable: optional #GCancellable object
447 * @callback: a #GAsyncReadyCallback.
448 * @user_data: a #gpointer.
450 * Reads data into @stream's buffer asynchronously, up to @count size.
451 * @io_priority can be used to prioritize reads. For the synchronous
452 * version of this function, see g_buffered_input_stream_fill().
455 g_buffered_input_stream_fill_async (GBufferedInputStream *stream,
458 GCancellable *cancellable,
459 GAsyncReadyCallback callback,
462 GBufferedInputStreamClass *class;
463 GSimpleAsyncResult *simple;
464 GError *error = NULL;
466 g_return_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream));
470 simple = g_simple_async_result_new (G_OBJECT (stream),
473 g_buffered_input_stream_fill_async);
474 g_simple_async_result_complete_in_idle (simple);
475 g_object_unref (simple);
479 if (((gssize) count) < 0)
481 g_simple_async_report_error_in_idle (G_OBJECT (stream),
484 G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
485 _("Too large count value passed to %s"),
490 if (!g_input_stream_set_pending (G_INPUT_STREAM (stream), &error))
492 g_simple_async_report_gerror_in_idle (G_OBJECT (stream),
496 g_error_free (error);
500 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
502 stream->priv->outstanding_callback = callback;
503 g_object_ref (stream);
504 class->fill_async (stream, count, io_priority, cancellable,
505 async_fill_callback_wrapper, user_data);
509 * g_buffered_input_stream_fill_finish:
510 * @stream: a #GBufferedInputStream.
511 * @result: a #GAsyncResult.
514 * Finishes an asynchronous read.
516 * Returns: a #gssize of the read stream, or %-1 on an error.
519 g_buffered_input_stream_fill_finish (GBufferedInputStream *stream,
520 GAsyncResult *result,
523 GSimpleAsyncResult *simple;
524 GBufferedInputStreamClass *class;
526 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
527 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), -1);
529 if (G_IS_SIMPLE_ASYNC_RESULT (result))
531 simple = G_SIMPLE_ASYNC_RESULT (result);
532 if (g_simple_async_result_propagate_error (simple, error))
535 /* Special case read of 0 bytes */
536 if (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_fill_async)
540 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
541 return class->fill_finish (stream, result, error);
545 * g_buffered_input_stream_get_available:
546 * @stream: #GBufferedInputStream.
548 * Gets the size of the available data within the stream.
550 * Returns: size of the available stream.
553 g_buffered_input_stream_get_available (GBufferedInputStream *stream)
555 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
557 return stream->priv->end - stream->priv->pos;
561 * g_buffered_input_stream_peek:
562 * @stream: a #GBufferedInputStream.
563 * @buffer: a pointer to an allocated chunk of memory.
567 * Peeks in the buffer, copying data of size @count into @buffer,
568 * offset @offset bytes.
570 * Returns: a #gsize of the number of bytes peeked, or %-1 on error.
573 g_buffered_input_stream_peek (GBufferedInputStream *stream,
581 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
582 g_return_val_if_fail (buffer != NULL, -1);
584 available = g_buffered_input_stream_get_available (stream);
586 if (offset > available)
589 end = MIN (offset + count, available);
590 count = end - offset;
592 memcpy (buffer, stream->priv->buffer + stream->priv->pos + offset, count);
597 * g_buffered_input_stream_peek_buffer:
598 * @stream: a #GBufferedInputStream.
599 * @count: a #gsize to get the number of bytes available in the buffer.
601 * Returns the buffer with the currently available bytes. The returned
602 * buffer must not be modified and will become invalid when reading from
603 * the stream or filling the buffer.
605 * Returns: read-only buffer
608 g_buffered_input_stream_peek_buffer (GBufferedInputStream *stream,
611 GBufferedInputStreamPrivate *priv;
613 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), NULL);
618 *count = priv->end - priv->pos;
620 return priv->buffer + priv->pos;
624 compact_buffer (GBufferedInputStream *stream)
626 GBufferedInputStreamPrivate *priv;
631 current_size = priv->end - priv->pos;
633 g_memmove (priv->buffer, priv->buffer + priv->pos, current_size);
636 priv->end = current_size;
640 g_buffered_input_stream_real_fill (GBufferedInputStream *stream,
642 GCancellable *cancellable,
645 GBufferedInputStreamPrivate *priv;
646 GInputStream *base_stream;
655 in_buffer = priv->end - priv->pos;
657 /* Never fill more than can fit in the buffer */
658 count = MIN (count, priv->len - in_buffer);
660 /* If requested length does not fit at end, compact */
661 if (priv->len - priv->end < count)
662 compact_buffer (stream);
664 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
665 nread = g_input_stream_read (base_stream,
666 priv->buffer + priv->end,
678 g_buffered_input_stream_skip (GInputStream *stream,
680 GCancellable *cancellable,
683 GBufferedInputStream *bstream;
684 GBufferedInputStreamPrivate *priv;
685 GBufferedInputStreamClass *class;
686 GInputStream *base_stream;
687 gsize available, bytes_skipped;
690 bstream = G_BUFFERED_INPUT_STREAM (stream);
691 priv = bstream->priv;
693 available = priv->end - priv->pos;
695 if (count <= available)
701 /* Full request not available, skip all currently available and
702 * request refill for more
707 bytes_skipped = available;
710 if (bytes_skipped > 0)
711 error = NULL; /* Ignore further errors if we already read some data */
713 if (count > priv->len)
715 /* Large request, shortcut buffer */
717 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
719 nread = g_input_stream_skip (base_stream,
724 if (nread < 0 && bytes_skipped == 0)
728 bytes_skipped += nread;
730 return bytes_skipped;
733 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
734 nread = class->fill (bstream, priv->len, cancellable, error);
738 if (bytes_skipped == 0)
741 return bytes_skipped;
744 available = priv->end - priv->pos;
745 count = MIN (count, available);
747 bytes_skipped += count;
750 return bytes_skipped;
754 g_buffered_input_stream_read (GInputStream *stream,
757 GCancellable *cancellable,
760 GBufferedInputStream *bstream;
761 GBufferedInputStreamPrivate *priv;
762 GBufferedInputStreamClass *class;
763 GInputStream *base_stream;
764 gsize available, bytes_read;
767 bstream = G_BUFFERED_INPUT_STREAM (stream);
768 priv = bstream->priv;
770 available = priv->end - priv->pos;
772 if (count <= available)
774 memcpy (buffer, priv->buffer + priv->pos, count);
779 /* Full request not available, read all currently availbile and request refill for more */
781 memcpy (buffer, priv->buffer + priv->pos, available);
784 bytes_read = available;
788 error = NULL; /* Ignore further errors if we already read some data */
790 if (count > priv->len)
792 /* Large request, shortcut buffer */
794 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
796 nread = g_input_stream_read (base_stream,
797 (char *)buffer + bytes_read,
802 if (nread < 0 && bytes_read == 0)
811 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
812 nread = class->fill (bstream, priv->len, cancellable, error);
821 available = priv->end - priv->pos;
822 count = MIN (count, available);
824 memcpy ((char *)buffer + bytes_read, (char *)priv->buffer + priv->pos, count);
832 * g_buffered_input_stream_read_byte:
833 * @stream: #GBufferedInputStream.
834 * @cancellable: optional #GCancellable object, %NULL to ignore.
835 * @error: location to store the error occuring, or %NULL to ignore.
837 * Tries to read a single byte from the stream or the buffer. Will block
840 * On success, the byte read from the stream is returned. On end of stream
841 * -1 is returned but it's not an exceptional error and @error is not set.
843 * If @cancellable is not %NULL, then the operation can be cancelled by
844 * triggering the cancellable object from another thread. If the operation
845 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
846 * operation was partially finished when the operation was cancelled the
847 * partial result will be returned, without an error.
849 * On error -1 is returned and @error is set accordingly.
851 * Returns: the byte read from the @stream, or -1 on end of stream or error.
854 g_buffered_input_stream_read_byte (GBufferedInputStream *stream,
855 GCancellable *cancellable,
858 GBufferedInputStreamPrivate *priv;
859 GBufferedInputStreamClass *class;
860 GInputStream *input_stream;
864 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
867 input_stream = G_INPUT_STREAM (stream);
869 if (g_input_stream_is_closed (input_stream))
871 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
872 _("Stream is already closed"));
876 if (!g_input_stream_set_pending (input_stream, error))
879 available = priv->end - priv->pos;
883 g_input_stream_clear_pending (input_stream);
884 return priv->buffer[priv->pos++];
887 /* Byte not available, request refill for more */
890 g_cancellable_push_current (cancellable);
895 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
896 nread = class->fill (stream, priv->len, cancellable, error);
899 g_cancellable_pop_current (cancellable);
901 g_input_stream_clear_pending (input_stream);
904 return -1; /* error or end of stream */
906 return priv->buffer[priv->pos++];
909 /* ************************** */
910 /* Async stuff implementation */
911 /* ************************** */
914 fill_async_callback (GObject *source_object,
915 GAsyncResult *result,
920 GSimpleAsyncResult *simple;
925 res = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
928 g_simple_async_result_set_op_res_gssize (simple, res);
931 g_simple_async_result_set_from_error (simple, error);
932 g_error_free (error);
935 /* Complete immediately, not in idle, since we're already in a mainloop callout */
936 g_simple_async_result_complete (simple);
937 g_object_unref (simple);
941 g_buffered_input_stream_real_fill_async (GBufferedInputStream *stream,
944 GCancellable *cancellable,
945 GAsyncReadyCallback callback,
948 GBufferedInputStreamPrivate *priv;
949 GInputStream *base_stream;
950 GSimpleAsyncResult *simple;
958 in_buffer = priv->end - priv->pos;
960 /* Never fill more than can fit in the buffer */
961 count = MIN (count, priv->len - in_buffer);
963 /* If requested length does not fit at end, compact */
964 if (priv->len - priv->end < count)
965 compact_buffer (stream);
967 simple = g_simple_async_result_new (G_OBJECT (stream),
969 g_buffered_input_stream_real_fill_async);
971 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
972 g_input_stream_read_async (base_stream,
973 priv->buffer + priv->end,
982 g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
983 GAsyncResult *result,
986 GSimpleAsyncResult *simple;
989 simple = G_SIMPLE_ASYNC_RESULT (result);
990 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_real_fill_async);
992 nread = g_simple_async_result_get_op_res_gssize (simple);
1003 free_read_async_data (gpointer _data)
1005 ReadAsyncData *data = _data;
1006 g_slice_free (ReadAsyncData, data);
1010 large_read_callback (GObject *source_object,
1011 GAsyncResult *result,
1014 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1015 ReadAsyncData *data;
1019 data = g_simple_async_result_get_op_res_gpointer (simple);
1022 nread = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
1025 /* Only report the error if we've not already read some data */
1026 if (nread < 0 && data->bytes_read == 0)
1027 g_simple_async_result_set_from_error (simple, error);
1030 data->bytes_read += nread;
1033 g_error_free (error);
1035 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1036 g_simple_async_result_complete (simple);
1037 g_object_unref (simple);
1041 read_fill_buffer_callback (GObject *source_object,
1042 GAsyncResult *result,
1045 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1046 GBufferedInputStream *bstream;
1047 GBufferedInputStreamPrivate *priv;
1048 ReadAsyncData *data;
1053 bstream = G_BUFFERED_INPUT_STREAM (source_object);
1054 priv = bstream->priv;
1056 data = g_simple_async_result_get_op_res_gpointer (simple);
1059 nread = g_buffered_input_stream_fill_finish (bstream,
1062 if (nread < 0 && data->bytes_read == 0)
1063 g_simple_async_result_set_from_error (simple, error);
1068 available = priv->end - priv->pos;
1069 data->count = MIN (data->count, available);
1071 memcpy ((char *)data->buffer + data->bytes_read, (char *)priv->buffer + priv->pos, data->count);
1072 data->bytes_read += data->count;
1073 priv->pos += data->count;
1077 g_error_free (error);
1079 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1080 g_simple_async_result_complete (simple);
1081 g_object_unref (simple);
1085 g_buffered_input_stream_read_async (GInputStream *stream,
1089 GCancellable *cancellable,
1090 GAsyncReadyCallback callback,
1093 GBufferedInputStream *bstream;
1094 GBufferedInputStreamPrivate *priv;
1095 GBufferedInputStreamClass *class;
1096 GInputStream *base_stream;
1098 GSimpleAsyncResult *simple;
1099 ReadAsyncData *data;
1101 bstream = G_BUFFERED_INPUT_STREAM (stream);
1102 priv = bstream->priv;
1104 data = g_slice_new (ReadAsyncData);
1105 data->buffer = buffer;
1106 data->bytes_read = 0;
1107 simple = g_simple_async_result_new (G_OBJECT (stream),
1108 callback, user_data,
1109 g_buffered_input_stream_read_async);
1110 g_simple_async_result_set_op_res_gpointer (simple, data, free_read_async_data);
1112 available = priv->end - priv->pos;
1114 if (count <= available)
1116 memcpy (buffer, priv->buffer + priv->pos, count);
1118 data->bytes_read = count;
1120 g_simple_async_result_complete_in_idle (simple);
1121 g_object_unref (simple);
1126 /* Full request not available, read all currently availbile and request refill for more */
1128 memcpy (buffer, priv->buffer + priv->pos, available);
1134 data->bytes_read = available;
1135 data->count = count;
1137 if (count > priv->len)
1139 /* Large request, shortcut buffer */
1141 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
1143 g_input_stream_read_async (base_stream,
1144 (char *)buffer + data->bytes_read,
1146 io_priority, cancellable,
1147 large_read_callback,
1152 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
1153 class->fill_async (bstream, priv->len, io_priority, cancellable,
1154 read_fill_buffer_callback, simple);
1159 g_buffered_input_stream_read_finish (GInputStream *stream,
1160 GAsyncResult *result,
1163 GSimpleAsyncResult *simple;
1164 ReadAsyncData *data;
1166 simple = G_SIMPLE_ASYNC_RESULT (result);
1168 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_read_async);
1170 data = g_simple_async_result_get_op_res_gpointer (simple);
1172 return data->bytes_read;
1176 gssize bytes_skipped;
1181 free_skip_async_data (gpointer _data)
1183 SkipAsyncData *data = _data;
1184 g_slice_free (SkipAsyncData, data);
1188 large_skip_callback (GObject *source_object,
1189 GAsyncResult *result,
1192 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1193 SkipAsyncData *data;
1197 data = g_simple_async_result_get_op_res_gpointer (simple);
1200 nread = g_input_stream_skip_finish (G_INPUT_STREAM (source_object),
1203 /* Only report the error if we've not already read some data */
1204 if (nread < 0 && data->bytes_skipped == 0)
1205 g_simple_async_result_set_from_error (simple, error);
1208 data->bytes_skipped += nread;
1211 g_error_free (error);
1213 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1214 g_simple_async_result_complete (simple);
1215 g_object_unref (simple);
1219 skip_fill_buffer_callback (GObject *source_object,
1220 GAsyncResult *result,
1223 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1224 GBufferedInputStream *bstream;
1225 GBufferedInputStreamPrivate *priv;
1226 SkipAsyncData *data;
1231 bstream = G_BUFFERED_INPUT_STREAM (source_object);
1232 priv = bstream->priv;
1234 data = g_simple_async_result_get_op_res_gpointer (simple);
1237 nread = g_buffered_input_stream_fill_finish (bstream,
1240 if (nread < 0 && data->bytes_skipped == 0)
1241 g_simple_async_result_set_from_error (simple, error);
1246 available = priv->end - priv->pos;
1247 data->count = MIN (data->count, available);
1249 data->bytes_skipped += data->count;
1250 priv->pos += data->count;
1254 g_error_free (error);
1256 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1257 g_simple_async_result_complete (simple);
1258 g_object_unref (simple);
1262 g_buffered_input_stream_skip_async (GInputStream *stream,
1265 GCancellable *cancellable,
1266 GAsyncReadyCallback callback,
1269 GBufferedInputStream *bstream;
1270 GBufferedInputStreamPrivate *priv;
1271 GBufferedInputStreamClass *class;
1272 GInputStream *base_stream;
1274 GSimpleAsyncResult *simple;
1275 SkipAsyncData *data;
1277 bstream = G_BUFFERED_INPUT_STREAM (stream);
1278 priv = bstream->priv;
1280 data = g_slice_new (SkipAsyncData);
1281 data->bytes_skipped = 0;
1282 simple = g_simple_async_result_new (G_OBJECT (stream),
1283 callback, user_data,
1284 g_buffered_input_stream_skip_async);
1285 g_simple_async_result_set_op_res_gpointer (simple, data, free_skip_async_data);
1287 available = priv->end - priv->pos;
1289 if (count <= available)
1292 data->bytes_skipped = count;
1294 g_simple_async_result_complete_in_idle (simple);
1295 g_object_unref (simple);
1300 /* Full request not available, skip all currently availbile and request refill for more */
1307 data->bytes_skipped = available;
1308 data->count = count;
1310 if (count > priv->len)
1312 /* Large request, shortcut buffer */
1314 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
1316 g_input_stream_skip_async (base_stream,
1318 io_priority, cancellable,
1319 large_skip_callback,
1324 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
1325 class->fill_async (bstream, priv->len, io_priority, cancellable,
1326 skip_fill_buffer_callback, simple);
1331 g_buffered_input_stream_skip_finish (GInputStream *stream,
1332 GAsyncResult *result,
1335 GSimpleAsyncResult *simple;
1336 SkipAsyncData *data;
1338 simple = G_SIMPLE_ASYNC_RESULT (result);
1340 g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_skip_async);
1342 data = g_simple_async_result_get_op_res_gpointer (simple);
1344 return data->bytes_skipped;
1348 #define __G_BUFFERED_INPUT_STREAM_C__
1349 #include "gioaliasdef.c"