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 "gsimpleasyncresult.h"
34 * SECTION:gbufferedinputstream
35 * @short_description: Buffered Input Stream
36 * @see_also: #GFilterInputStream, #GInputStream
38 * Buffered input stream implements #GFilterInputStream and provides
41 * By default, #GBufferedInputStream's buffer size is set at 4 kilobytes.
43 * To create a buffered input stream, use g_buffered_input_stream_new(), or
44 * g_buffered_input_stream_new_sized() to specify the buffer's size at construction.
46 * To get the size of a buffer within a buffered input stream, use
47 * g_buffered_input_stream_get_buffer_size(). To change the size of a
48 * buffered input stream's buffer, use g_buffered_input_stream_set_buffer_size().
49 * Note: the buffer's size cannot be reduced below the size of the data within the
56 #define DEFAULT_BUFFER_SIZE 4096
58 struct _GBufferedInputStreamPrivate {
63 GAsyncReadyCallback outstanding_callback;
71 static void g_buffered_input_stream_set_property (GObject *object,
76 static void g_buffered_input_stream_get_property (GObject *object,
80 static void g_buffered_input_stream_finalize (GObject *object);
83 static gssize g_buffered_input_stream_skip (GInputStream *stream,
85 GCancellable *cancellable,
87 static void g_buffered_input_stream_skip_async (GInputStream *stream,
90 GCancellable *cancellable,
91 GAsyncReadyCallback callback,
93 static gssize g_buffered_input_stream_skip_finish (GInputStream *stream,
96 static gssize g_buffered_input_stream_read (GInputStream *stream,
99 GCancellable *cancellable,
101 static void g_buffered_input_stream_read_async (GInputStream *stream,
105 GCancellable *cancellable,
106 GAsyncReadyCallback callback,
108 static gssize g_buffered_input_stream_read_finish (GInputStream *stream,
109 GAsyncResult *result,
111 static gssize g_buffered_input_stream_real_fill (GBufferedInputStream *stream,
113 GCancellable *cancellable,
115 static void g_buffered_input_stream_real_fill_async (GBufferedInputStream *stream,
118 GCancellable *cancellable,
119 GAsyncReadyCallback callback,
121 static gssize g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
122 GAsyncResult *result,
125 static void compact_buffer (GBufferedInputStream *stream);
127 G_DEFINE_TYPE (GBufferedInputStream,
128 g_buffered_input_stream,
129 G_TYPE_FILTER_INPUT_STREAM)
133 g_buffered_input_stream_class_init (GBufferedInputStreamClass *klass)
135 GObjectClass *object_class;
136 GInputStreamClass *istream_class;
137 GBufferedInputStreamClass *bstream_class;
139 g_type_class_add_private (klass, sizeof (GBufferedInputStreamPrivate));
141 object_class = G_OBJECT_CLASS (klass);
142 object_class->get_property = g_buffered_input_stream_get_property;
143 object_class->set_property = g_buffered_input_stream_set_property;
144 object_class->finalize = g_buffered_input_stream_finalize;
146 istream_class = G_INPUT_STREAM_CLASS (klass);
147 istream_class->skip = g_buffered_input_stream_skip;
148 istream_class->skip_async = g_buffered_input_stream_skip_async;
149 istream_class->skip_finish = g_buffered_input_stream_skip_finish;
150 istream_class->read = g_buffered_input_stream_read;
151 istream_class->read_async = g_buffered_input_stream_read_async;
152 istream_class->read_finish = g_buffered_input_stream_read_finish;
154 bstream_class = G_BUFFERED_INPUT_STREAM_CLASS (klass);
155 bstream_class->fill = g_buffered_input_stream_real_fill;
156 bstream_class->fill_async = g_buffered_input_stream_real_fill_async;
157 bstream_class->fill_finish = g_buffered_input_stream_real_fill_finish;
159 g_object_class_install_property (object_class,
161 g_param_spec_uint ("buffer-size",
163 P_("The size of the backend buffer"),
167 G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
168 G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
174 * g_buffered_input_stream_get_buffer_size:
175 * @stream: #GBufferedInputStream.
177 * Gets the size of the input buffer.
179 * Returns: the current buffer size, or %-1 on error.
182 g_buffered_input_stream_get_buffer_size (GBufferedInputStream *stream)
184 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
186 return stream->priv->len;
190 * g_buffered_input_stream_set_buffer_size:
191 * @stream: #GBufferedInputStream.
194 * Sets the size of the internal buffer of @stream to @size, or to the
195 * size of the contents of the buffer. The buffer can never be resized
196 * smaller than its current contents.
199 g_buffered_input_stream_set_buffer_size (GBufferedInputStream *stream,
202 GBufferedInputStreamPrivate *priv;
206 g_return_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream));
212 in_buffer = priv->end - priv->pos;
214 /* Never resize smaller than current buffer contents */
215 size = MAX (size, in_buffer);
217 buffer = g_malloc (size);
218 memcpy (buffer, priv->buffer + priv->pos, in_buffer);
221 priv->end = in_buffer;
222 g_free (priv->buffer);
223 priv->buffer = buffer;
230 priv->buffer = g_malloc (size);
235 g_buffered_input_stream_set_property (GObject *object,
240 GBufferedInputStreamPrivate *priv;
241 GBufferedInputStream *bstream;
243 bstream = G_BUFFERED_INPUT_STREAM (object);
244 priv = bstream->priv;
249 g_buffered_input_stream_set_buffer_size (bstream, g_value_get_uint (value));
253 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
260 g_buffered_input_stream_get_property (GObject *object,
265 GBufferedInputStreamPrivate *priv;
266 GBufferedInputStream *bstream;
268 bstream = G_BUFFERED_INPUT_STREAM (object);
269 priv = bstream->priv;
274 g_value_set_uint (value, priv->len);
278 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
284 g_buffered_input_stream_finalize (GObject *object)
286 GBufferedInputStreamPrivate *priv;
287 GBufferedInputStream *stream;
289 stream = G_BUFFERED_INPUT_STREAM (object);
292 g_free (priv->buffer);
294 if (G_OBJECT_CLASS (g_buffered_input_stream_parent_class)->finalize)
295 (*G_OBJECT_CLASS (g_buffered_input_stream_parent_class)->finalize) (object);
299 g_buffered_input_stream_init (GBufferedInputStream *stream)
301 stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
302 G_TYPE_BUFFERED_INPUT_STREAM,
303 GBufferedInputStreamPrivate);
308 * g_buffered_input_stream_new:
309 * @base_stream: a #GInputStream.
311 * Creates a new #GInputStream from the given @base_stream, with
312 * a buffer set to the default size (4 kilobytes).
314 * Returns: a #GInputStream for the given @base_stream.
317 g_buffered_input_stream_new (GInputStream *base_stream)
319 GInputStream *stream;
321 g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
323 stream = g_object_new (G_TYPE_BUFFERED_INPUT_STREAM,
324 "base-stream", base_stream,
331 * g_buffered_input_stream_new_sized:
332 * @base_stream: a #GOutputStream.
335 * Creates a new #GBufferedInputStream from the given @base_stream,
336 * with a buffer set to @size.
338 * Returns: a #GInputStream.
341 g_buffered_input_stream_new_sized (GInputStream *base_stream,
344 GInputStream *stream;
346 g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
348 stream = g_object_new (G_TYPE_BUFFERED_INPUT_STREAM,
349 "base-stream", base_stream,
350 "buffer-size", (guint)size,
357 * g_buffered_input_stream_fill:
358 * @stream: #GBufferedInputStream.
359 * @count: the number of bytes that will be read from the stream.
360 * @cancellable: optional #GCancellable object, %NULL to ignore.
361 * @error: location to store the error occuring, or %NULL to ignore.
363 * Tries to read @count bytes from the stream into the buffer.
364 * Will block during this read.
366 * If @count is zero, returns zero and does nothing. A value of @count
367 * larger than %G_MAXSSIZE will cause a %G_IO_ERROR_INVALID_ARGUMENT error.
369 * On success, the number of bytes read into the buffer is returned.
370 * It is not an error if this is not the same as the requested size, as it
371 * can happen e.g. near the end of a file. Zero is returned on end of file
372 * (or if @count is zero), but never otherwise.
374 * If @cancellable is not %NULL, then the operation can be cancelled by
375 * triggering the cancellable object from another thread. If the operation
376 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
377 * operation was partially finished when the operation was cancelled the
378 * partial result will be returned, without an error.
380 * On error -1 is returned and @error is set accordingly.
382 * For the asynchronous, non-blocking, version of this function, see
383 * g_buffered_input_stream_fill_async().
385 * Returns: the number of bytes read into @stream's buffer, up to @count,
389 g_buffered_input_stream_fill (GBufferedInputStream *stream,
391 GCancellable *cancellable,
394 GBufferedInputStreamClass *class;
395 GInputStream *input_stream;
398 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
400 input_stream = G_INPUT_STREAM (stream);
402 if (g_input_stream_is_closed (input_stream))
404 g_set_error (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
405 _("Stream is already closed"));
409 if (g_input_stream_has_pending (input_stream))
411 g_set_error (error, G_IO_ERROR, G_IO_ERROR_PENDING,
412 _("Stream has outstanding operation"));
416 g_input_stream_set_pending (input_stream, TRUE);
419 g_push_current_cancellable (cancellable);
421 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
422 res = class->fill (stream, count, cancellable, error);
425 g_pop_current_cancellable (cancellable);
427 g_input_stream_set_pending (input_stream, FALSE);
433 async_fill_callback_wrapper (GObject *source_object,
437 GBufferedInputStream *stream = G_BUFFERED_INPUT_STREAM (source_object);
439 g_input_stream_set_pending (G_INPUT_STREAM (stream), FALSE);
440 (*stream->priv->outstanding_callback) (source_object, res, user_data);
441 g_object_unref (stream);
445 * g_buffered_input_stream_fill_async:
446 * @stream: #GBufferedInputStream.
448 * @io_priority: the <link linkend="io-priority">I/O priority</link>
450 * @cancellable: optional #GCancellable object
451 * @callback: a #GAsyncReadyCallback.
452 * @user_data: a #gpointer.
454 * Reads data into @stream's buffer asynchronously, up to @count size.
455 * @io_priority can be used to prioritize reads. For the synchronous
456 * version of this function, see g_buffered_input_stream_fill().
459 g_buffered_input_stream_fill_async (GBufferedInputStream *stream,
462 GCancellable *cancellable,
463 GAsyncReadyCallback callback,
466 GBufferedInputStreamClass *class;
467 GSimpleAsyncResult *simple;
469 g_return_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream));
473 simple = g_simple_async_result_new (G_OBJECT (stream),
476 g_buffered_input_stream_fill_async);
477 g_simple_async_result_complete_in_idle (simple);
478 g_object_unref (simple);
482 if (((gssize) count) < 0)
484 g_simple_async_report_error_in_idle (G_OBJECT (stream),
487 G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
488 _("Too large count value passed to g_input_stream_read_async"));
492 if (g_input_stream_is_closed (G_INPUT_STREAM (stream)))
494 g_simple_async_report_error_in_idle (G_OBJECT (stream),
497 G_IO_ERROR, G_IO_ERROR_CLOSED,
498 _("Stream is already closed"));
502 if (g_input_stream_has_pending (G_INPUT_STREAM (stream)))
504 g_simple_async_report_error_in_idle (G_OBJECT (stream),
507 G_IO_ERROR, G_IO_ERROR_PENDING,
508 _("Stream has outstanding operation"));
512 class = G_BUFFERED_INPUT_STREAM_GET_CLASS (stream);
514 g_input_stream_set_pending (G_INPUT_STREAM (stream), TRUE);
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 GInputStream *base_stream;
699 gsize available, bytes_skipped;
702 bstream = G_BUFFERED_INPUT_STREAM (stream);
703 priv = bstream->priv;
705 available = priv->end - priv->pos;
707 if (count <= available)
713 /* Full request not available, skip all currently available and
714 * request refill for more
719 bytes_skipped = available;
722 if (bytes_skipped > 0)
723 error = NULL; /* Ignore further errors if we already read some data */
725 if (count > priv->len)
727 /* Large request, shortcut buffer */
729 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
731 nread = g_input_stream_skip (base_stream,
736 if (nread < 0 && bytes_skipped == 0)
740 bytes_skipped += nread;
742 return bytes_skipped;
745 g_input_stream_set_pending (stream, FALSE); /* to avoid already pending error */
746 nread = g_buffered_input_stream_fill (bstream, priv->len, cancellable, error);
747 g_input_stream_set_pending (stream, TRUE); /* enable again */
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 GInputStream *base_stream;
776 gsize available, bytes_read;
779 bstream = G_BUFFERED_INPUT_STREAM (stream);
780 priv = bstream->priv;
782 available = priv->end - priv->pos;
784 if (count <= available)
786 memcpy (buffer, priv->buffer + priv->pos, count);
791 /* Full request not available, read all currently availbile and request refill for more */
793 memcpy (buffer, priv->buffer + priv->pos, available);
796 bytes_read = available;
800 error = NULL; /* Ignore further errors if we already read some data */
802 if (count > priv->len)
804 /* Large request, shortcut buffer */
806 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
808 nread = g_input_stream_read (base_stream,
809 (char *)buffer + bytes_read,
814 if (nread < 0 && bytes_read == 0)
823 g_input_stream_set_pending (stream, FALSE); /* to avoid already pending error */
824 nread = g_buffered_input_stream_fill (bstream, priv->len, cancellable, error);
825 g_input_stream_set_pending (stream, TRUE); /* enable again */
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 GInputStream *input_stream;
876 g_return_val_if_fail (G_IS_BUFFERED_INPUT_STREAM (stream), -1);
879 input_stream = G_INPUT_STREAM (stream);
881 if (g_input_stream_is_closed (input_stream))
883 g_set_error (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
884 _("Stream is already closed"));
888 if (g_input_stream_has_pending (input_stream))
890 g_set_error (error, G_IO_ERROR, G_IO_ERROR_PENDING,
891 _("Stream has outstanding operation"));
895 available = priv->end - priv->pos;
898 return priv->buffer[priv->pos++];
900 /* Byte not available, request refill for more */
903 g_push_current_cancellable (cancellable);
908 nread = g_buffered_input_stream_fill (stream, priv->len, cancellable, error);
911 g_pop_current_cancellable (cancellable);
914 return -1; /* error or end of stream */
916 return priv->buffer[priv->pos++];
919 /* ************************** */
920 /* Async stuff implementation */
921 /* ************************** */
924 fill_async_callback (GObject *source_object,
925 GAsyncResult *result,
930 GSimpleAsyncResult *simple;
935 res = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
938 g_simple_async_result_set_op_res_gssize (simple, res);
941 g_simple_async_result_set_from_error (simple, error);
942 g_error_free (error);
945 /* Complete immediately, not in idle, since we're already in a mainloop callout */
946 g_simple_async_result_complete (simple);
947 g_object_unref (simple);
951 g_buffered_input_stream_real_fill_async (GBufferedInputStream *stream,
954 GCancellable *cancellable,
955 GAsyncReadyCallback callback,
958 GBufferedInputStreamPrivate *priv;
959 GInputStream *base_stream;
960 GSimpleAsyncResult *simple;
968 in_buffer = priv->end - priv->pos;
970 /* Never fill more than can fit in the buffer */
971 count = MIN (count, priv->len - in_buffer);
973 /* If requested length does not fit at end, compact */
974 if (priv->len - priv->end < count)
975 compact_buffer (stream);
977 simple = g_simple_async_result_new (G_OBJECT (stream),
979 g_buffered_input_stream_real_fill_async);
981 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
982 g_input_stream_read_async (base_stream,
983 priv->buffer + priv->end,
992 g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
993 GAsyncResult *result,
996 GSimpleAsyncResult *simple;
999 simple = G_SIMPLE_ASYNC_RESULT (result);
1000 g_assert (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_real_fill_async);
1002 nread = g_simple_async_result_get_op_res_gssize (simple);
1013 free_read_async_data (gpointer _data)
1015 ReadAsyncData *data = _data;
1016 g_slice_free (ReadAsyncData, data);
1020 large_read_callback (GObject *source_object,
1021 GAsyncResult *result,
1024 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1025 ReadAsyncData *data;
1029 data = g_simple_async_result_get_op_res_gpointer (simple);
1032 nread = g_input_stream_read_finish (G_INPUT_STREAM (source_object),
1035 /* Only report the error if we've not already read some data */
1036 if (nread < 0 && data->bytes_read == 0)
1037 g_simple_async_result_set_from_error (simple, error);
1040 data->bytes_read += nread;
1043 g_error_free (error);
1045 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1046 g_simple_async_result_complete (simple);
1047 g_object_unref (simple);
1051 read_fill_buffer_callback (GObject *source_object,
1052 GAsyncResult *result,
1055 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1056 GBufferedInputStream *bstream;
1057 GBufferedInputStreamPrivate *priv;
1058 ReadAsyncData *data;
1063 bstream = G_BUFFERED_INPUT_STREAM (source_object);
1064 priv = bstream->priv;
1066 g_input_stream_set_pending (G_INPUT_STREAM (bstream), TRUE); /* enable again */
1068 data = g_simple_async_result_get_op_res_gpointer (simple);
1071 nread = g_buffered_input_stream_fill_finish (bstream,
1074 if (nread < 0 && data->bytes_read == 0)
1075 g_simple_async_result_set_from_error (simple, error);
1080 available = priv->end - priv->pos;
1081 data->count = MIN (data->count, available);
1083 memcpy ((char *)data->buffer + data->bytes_read, (char *)priv->buffer + priv->pos, data->count);
1084 data->bytes_read += data->count;
1085 priv->pos += data->count;
1089 g_error_free (error);
1091 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1092 g_simple_async_result_complete (simple);
1093 g_object_unref (simple);
1097 g_buffered_input_stream_read_async (GInputStream *stream,
1101 GCancellable *cancellable,
1102 GAsyncReadyCallback callback,
1105 GBufferedInputStream *bstream;
1106 GBufferedInputStreamPrivate *priv;
1107 GInputStream *base_stream;
1109 GSimpleAsyncResult *simple;
1110 ReadAsyncData *data;
1112 bstream = G_BUFFERED_INPUT_STREAM (stream);
1113 priv = bstream->priv;
1115 data = g_slice_new (ReadAsyncData);
1116 data->buffer = buffer;
1117 data->bytes_read = 0;
1118 simple = g_simple_async_result_new (G_OBJECT (stream),
1119 callback, user_data,
1120 g_buffered_input_stream_read_async);
1121 g_simple_async_result_set_op_res_gpointer (simple, data, free_read_async_data);
1123 available = priv->end - priv->pos;
1125 if (count <= available)
1127 memcpy (buffer, priv->buffer + priv->pos, count);
1129 data->bytes_read = count;
1131 g_simple_async_result_complete_in_idle (simple);
1132 g_object_unref (simple);
1137 /* Full request not available, read all currently availbile and request refill for more */
1139 memcpy (buffer, priv->buffer + priv->pos, available);
1145 data->bytes_read = available;
1146 data->count = count;
1148 if (count > priv->len)
1150 /* Large request, shortcut buffer */
1152 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
1154 g_input_stream_read_async (base_stream,
1155 (char *)buffer + data->bytes_read,
1157 io_priority, cancellable,
1158 large_read_callback,
1163 g_input_stream_set_pending (stream, FALSE); /* to avoid already pending error */
1164 g_buffered_input_stream_fill_async (bstream, priv->len,
1165 io_priority, cancellable,
1166 read_fill_buffer_callback, simple);
1171 g_buffered_input_stream_read_finish (GInputStream *stream,
1172 GAsyncResult *result,
1175 GSimpleAsyncResult *simple;
1176 ReadAsyncData *data;
1178 simple = G_SIMPLE_ASYNC_RESULT (result);
1180 g_assert (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_read_async);
1182 data = g_simple_async_result_get_op_res_gpointer (simple);
1184 return data->bytes_read;
1188 gssize bytes_skipped;
1193 free_skip_async_data (gpointer _data)
1195 SkipAsyncData *data = _data;
1196 g_slice_free (SkipAsyncData, data);
1200 large_skip_callback (GObject *source_object,
1201 GAsyncResult *result,
1204 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1205 SkipAsyncData *data;
1209 data = g_simple_async_result_get_op_res_gpointer (simple);
1212 nread = g_input_stream_skip_finish (G_INPUT_STREAM (source_object),
1215 /* Only report the error if we've not already read some data */
1216 if (nread < 0 && data->bytes_skipped == 0)
1217 g_simple_async_result_set_from_error (simple, error);
1220 data->bytes_skipped += nread;
1223 g_error_free (error);
1225 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1226 g_simple_async_result_complete (simple);
1227 g_object_unref (simple);
1231 skip_fill_buffer_callback (GObject *source_object,
1232 GAsyncResult *result,
1235 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
1236 GBufferedInputStream *bstream;
1237 GBufferedInputStreamPrivate *priv;
1238 SkipAsyncData *data;
1243 bstream = G_BUFFERED_INPUT_STREAM (source_object);
1244 priv = bstream->priv;
1246 g_input_stream_set_pending (G_INPUT_STREAM (bstream), TRUE); /* enable again */
1248 data = g_simple_async_result_get_op_res_gpointer (simple);
1251 nread = g_buffered_input_stream_fill_finish (bstream,
1254 if (nread < 0 && data->bytes_skipped == 0)
1255 g_simple_async_result_set_from_error (simple, error);
1260 available = priv->end - priv->pos;
1261 data->count = MIN (data->count, available);
1263 data->bytes_skipped += data->count;
1264 priv->pos += data->count;
1268 g_error_free (error);
1270 /* Complete immediately, not in idle, since we're already in a mainloop callout */
1271 g_simple_async_result_complete (simple);
1272 g_object_unref (simple);
1276 g_buffered_input_stream_skip_async (GInputStream *stream,
1279 GCancellable *cancellable,
1280 GAsyncReadyCallback callback,
1283 GBufferedInputStream *bstream;
1284 GBufferedInputStreamPrivate *priv;
1285 GInputStream *base_stream;
1287 GSimpleAsyncResult *simple;
1288 SkipAsyncData *data;
1290 bstream = G_BUFFERED_INPUT_STREAM (stream);
1291 priv = bstream->priv;
1293 data = g_slice_new (SkipAsyncData);
1294 data->bytes_skipped = 0;
1295 simple = g_simple_async_result_new (G_OBJECT (stream),
1296 callback, user_data,
1297 g_buffered_input_stream_skip_async);
1298 g_simple_async_result_set_op_res_gpointer (simple, data, free_skip_async_data);
1300 available = priv->end - priv->pos;
1302 if (count <= available)
1305 data->bytes_skipped = count;
1307 g_simple_async_result_complete_in_idle (simple);
1308 g_object_unref (simple);
1313 /* Full request not available, skip all currently availbile and request refill for more */
1320 data->bytes_skipped = available;
1321 data->count = count;
1323 if (count > priv->len)
1325 /* Large request, shortcut buffer */
1327 base_stream = G_FILTER_INPUT_STREAM (stream)->base_stream;
1329 g_input_stream_skip_async (base_stream,
1331 io_priority, cancellable,
1332 large_skip_callback,
1337 g_input_stream_set_pending (stream, FALSE); /* to avoid already pending error */
1338 g_buffered_input_stream_fill_async (bstream, priv->len,
1339 io_priority, cancellable,
1340 skip_fill_buffer_callback, simple);
1345 g_buffered_input_stream_skip_finish (GInputStream *stream,
1346 GAsyncResult *result,
1349 GSimpleAsyncResult *simple;
1350 SkipAsyncData *data;
1352 simple = G_SIMPLE_ASYNC_RESULT (result);
1354 g_assert (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_skip_async);
1356 data = g_simple_async_result_get_op_res_gpointer (simple);
1358 return data->bytes_skipped;
1362 #define __G_BUFFERED_INPUT_STREAM_C__
1363 #include "gioaliasdef.c"