1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
4 * Copyright (C) 2007 Jürg Billeter
5 * Copyright © 2009 Codethink Limited
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307, USA.
22 * Author: Alexander Larsson <alexl@redhat.com>
26 #include "gdatainputstream.h"
27 #include "gsimpleasyncresult.h"
28 #include "gcancellable.h"
29 #include "gioenumtypes.h"
36 * SECTION:gdatainputstream
37 * @short_description: Data Input Stream
39 * @see_also: #GInputStream
41 * Data input stream implements #GInputStream and includes functions for
42 * reading structured data directly from a binary input stream.
46 struct _GDataInputStreamPrivate {
47 GDataStreamByteOrder byte_order;
48 GDataStreamNewlineType newline_type;
57 static void g_data_input_stream_set_property (GObject *object,
61 static void g_data_input_stream_get_property (GObject *object,
66 G_DEFINE_TYPE (GDataInputStream,
68 G_TYPE_BUFFERED_INPUT_STREAM)
72 g_data_input_stream_class_init (GDataInputStreamClass *klass)
74 GObjectClass *object_class;
76 g_type_class_add_private (klass, sizeof (GDataInputStreamPrivate));
78 object_class = G_OBJECT_CLASS (klass);
79 object_class->get_property = g_data_input_stream_get_property;
80 object_class->set_property = g_data_input_stream_set_property;
83 * GDataStream:byte-order:
85 * The ::byte-order property determines the byte ordering that
86 * is used when reading multi-byte entities (such as integers)
89 g_object_class_install_property (object_class,
91 g_param_spec_enum ("byte-order",
94 G_TYPE_DATA_STREAM_BYTE_ORDER,
95 G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN,
96 G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_BLURB));
99 * GDataStream:newline-type:
101 * The :newline-type property determines what is considered
102 * as a line ending when reading complete lines from the stream.
104 g_object_class_install_property (object_class,
106 g_param_spec_enum ("newline-type",
108 P_("The accepted types of line ending"),
109 G_TYPE_DATA_STREAM_NEWLINE_TYPE,
110 G_DATA_STREAM_NEWLINE_TYPE_LF,
111 G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_BLURB));
115 g_data_input_stream_set_property (GObject *object,
120 GDataInputStream *dstream;
122 dstream = G_DATA_INPUT_STREAM (object);
126 case PROP_BYTE_ORDER:
127 g_data_input_stream_set_byte_order (dstream, g_value_get_enum (value));
130 case PROP_NEWLINE_TYPE:
131 g_data_input_stream_set_newline_type (dstream, g_value_get_enum (value));
135 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
142 g_data_input_stream_get_property (GObject *object,
147 GDataInputStreamPrivate *priv;
148 GDataInputStream *dstream;
150 dstream = G_DATA_INPUT_STREAM (object);
151 priv = dstream->priv;
155 case PROP_BYTE_ORDER:
156 g_value_set_enum (value, priv->byte_order);
159 case PROP_NEWLINE_TYPE:
160 g_value_set_enum (value, priv->newline_type);
164 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
170 g_data_input_stream_init (GDataInputStream *stream)
172 stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
173 G_TYPE_DATA_INPUT_STREAM,
174 GDataInputStreamPrivate);
176 stream->priv->byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
177 stream->priv->newline_type = G_DATA_STREAM_NEWLINE_TYPE_LF;
181 * g_data_input_stream_new:
182 * @base_stream: a #GInputStream.
184 * Creates a new data input stream for the @base_stream.
186 * Returns: a new #GDataInputStream.
189 g_data_input_stream_new (GInputStream *base_stream)
191 GDataInputStream *stream;
193 g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
195 stream = g_object_new (G_TYPE_DATA_INPUT_STREAM,
196 "base-stream", base_stream,
203 * g_data_input_stream_set_byte_order:
204 * @stream: a given #GDataInputStream.
205 * @order: a #GDataStreamByteOrder to set.
207 * This function sets the byte order for the given @stream. All subsequent
208 * reads from the @stream will be read in the given @order.
212 g_data_input_stream_set_byte_order (GDataInputStream *stream,
213 GDataStreamByteOrder order)
215 GDataInputStreamPrivate *priv;
217 g_return_if_fail (G_IS_DATA_INPUT_STREAM (stream));
221 if (priv->byte_order != order)
223 priv->byte_order = order;
225 g_object_notify (G_OBJECT (stream), "byte-order");
230 * g_data_input_stream_get_byte_order:
231 * @stream: a given #GDataInputStream.
233 * Gets the byte order for the data input stream.
235 * Returns: the @stream's current #GDataStreamByteOrder.
238 g_data_input_stream_get_byte_order (GDataInputStream *stream)
240 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN);
242 return stream->priv->byte_order;
246 * g_data_input_stream_set_newline_type:
247 * @stream: a #GDataInputStream.
248 * @type: the type of new line return as #GDataStreamNewlineType.
250 * Sets the newline type for the @stream.
252 * Note that using G_DATA_STREAM_NEWLINE_TYPE_ANY is slightly unsafe. If a read
253 * chunk ends in "CR" we must read an additional byte to know if this is "CR" or
254 * "CR LF", and this might block if there is no more data availible.
258 g_data_input_stream_set_newline_type (GDataInputStream *stream,
259 GDataStreamNewlineType type)
261 GDataInputStreamPrivate *priv;
263 g_return_if_fail (G_IS_DATA_INPUT_STREAM (stream));
267 if (priv->newline_type != type)
269 priv->newline_type = type;
271 g_object_notify (G_OBJECT (stream), "newline-type");
276 * g_data_input_stream_get_newline_type:
277 * @stream: a given #GDataInputStream.
279 * Gets the current newline type for the @stream.
281 * Returns: #GDataStreamNewlineType for the given @stream.
283 GDataStreamNewlineType
284 g_data_input_stream_get_newline_type (GDataInputStream *stream)
286 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), G_DATA_STREAM_NEWLINE_TYPE_ANY);
288 return stream->priv->newline_type;
292 read_data (GDataInputStream *stream,
295 GCancellable *cancellable,
301 while ((available = g_buffered_input_stream_get_available (G_BUFFERED_INPUT_STREAM (stream))) < size)
303 res = g_buffered_input_stream_fill (G_BUFFERED_INPUT_STREAM (stream),
310 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
311 _("Unexpected early end-of-stream"));
316 /* This should always succeed, since it's in the buffer */
317 res = g_input_stream_read (G_INPUT_STREAM (stream),
320 g_warn_if_fail (res == size);
326 * g_data_input_stream_read_byte:
327 * @stream: a given #GDataInputStream.
328 * @cancellable: optional #GCancellable object, %NULL to ignore.
329 * @error: #GError for error reporting.
331 * Reads an unsigned 8-bit/1-byte value from @stream.
333 * Returns: an unsigned 8-bit/1-byte value read from the @stream or %0
334 * if an error occurred.
337 g_data_input_stream_read_byte (GDataInputStream *stream,
338 GCancellable *cancellable,
343 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), '\0');
345 if (read_data (stream, &c, 1, cancellable, error))
353 * g_data_input_stream_read_int16:
354 * @stream: a given #GDataInputStream.
355 * @cancellable: optional #GCancellable object, %NULL to ignore.
356 * @error: #GError for error reporting.
358 * Reads a 16-bit/2-byte value from @stream.
360 * In order to get the correct byte order for this read operation,
361 * see g_data_input_stream_get_byte_order() and g_data_input_stream_set_byte_order().
363 * Returns: a signed 16-bit/2-byte value read from @stream or %0 if
367 g_data_input_stream_read_int16 (GDataInputStream *stream,
368 GCancellable *cancellable,
373 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
375 if (read_data (stream, &v, 2, cancellable, error))
377 switch (stream->priv->byte_order)
379 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
380 v = GINT16_FROM_BE (v);
382 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
383 v = GINT16_FROM_LE (v);
385 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
397 * g_data_input_stream_read_uint16:
398 * @stream: a given #GDataInputStream.
399 * @cancellable: optional #GCancellable object, %NULL to ignore.
400 * @error: #GError for error reporting.
402 * Reads an unsigned 16-bit/2-byte value from @stream.
404 * In order to get the correct byte order for this read operation,
405 * see g_data_input_stream_get_byte_order() and g_data_input_stream_set_byte_order().
407 * Returns: an unsigned 16-bit/2-byte value read from the @stream or %0 if
411 g_data_input_stream_read_uint16 (GDataInputStream *stream,
412 GCancellable *cancellable,
417 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
419 if (read_data (stream, &v, 2, cancellable, error))
421 switch (stream->priv->byte_order)
423 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
424 v = GUINT16_FROM_BE (v);
426 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
427 v = GUINT16_FROM_LE (v);
429 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
441 * g_data_input_stream_read_int32:
442 * @stream: a given #GDataInputStream.
443 * @cancellable: optional #GCancellable object, %NULL to ignore.
444 * @error: #GError for error reporting.
446 * Reads a signed 32-bit/4-byte value from @stream.
448 * In order to get the correct byte order for this read operation,
449 * see g_data_input_stream_get_byte_order() and g_data_input_stream_set_byte_order().
451 * If @cancellable is not %NULL, then the operation can be cancelled by
452 * triggering the cancellable object from another thread. If the operation
453 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
455 * Returns: a signed 32-bit/4-byte value read from the @stream or %0 if
459 g_data_input_stream_read_int32 (GDataInputStream *stream,
460 GCancellable *cancellable,
465 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
467 if (read_data (stream, &v, 4, cancellable, error))
469 switch (stream->priv->byte_order)
471 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
472 v = GINT32_FROM_BE (v);
474 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
475 v = GINT32_FROM_LE (v);
477 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
489 * g_data_input_stream_read_uint32:
490 * @stream: a given #GDataInputStream.
491 * @cancellable: optional #GCancellable object, %NULL to ignore.
492 * @error: #GError for error reporting.
494 * Reads an unsigned 32-bit/4-byte value from @stream.
496 * In order to get the correct byte order for this read operation,
497 * see g_data_input_stream_get_byte_order() and g_data_input_stream_set_byte_order().
499 * If @cancellable is not %NULL, then the operation can be cancelled by
500 * triggering the cancellable object from another thread. If the operation
501 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
503 * Returns: an unsigned 32-bit/4-byte value read from the @stream or %0 if
507 g_data_input_stream_read_uint32 (GDataInputStream *stream,
508 GCancellable *cancellable,
513 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
515 if (read_data (stream, &v, 4, cancellable, error))
517 switch (stream->priv->byte_order)
519 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
520 v = GUINT32_FROM_BE (v);
522 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
523 v = GUINT32_FROM_LE (v);
525 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
537 * g_data_input_stream_read_int64:
538 * @stream: a given #GDataInputStream.
539 * @cancellable: optional #GCancellable object, %NULL to ignore.
540 * @error: #GError for error reporting.
542 * Reads a 64-bit/8-byte value from @stream.
544 * In order to get the correct byte order for this read operation,
545 * see g_data_input_stream_get_byte_order() and g_data_input_stream_set_byte_order().
547 * If @cancellable is not %NULL, then the operation can be cancelled by
548 * triggering the cancellable object from another thread. If the operation
549 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
551 * Returns: a signed 64-bit/8-byte value read from @stream or %0 if
555 g_data_input_stream_read_int64 (GDataInputStream *stream,
556 GCancellable *cancellable,
561 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
563 if (read_data (stream, &v, 8, cancellable, error))
565 switch (stream->priv->byte_order)
567 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
568 v = GINT64_FROM_BE (v);
570 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
571 v = GINT64_FROM_LE (v);
573 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
585 * g_data_input_stream_read_uint64:
586 * @stream: a given #GDataInputStream.
587 * @cancellable: optional #GCancellable object, %NULL to ignore.
588 * @error: #GError for error reporting.
590 * Reads an unsigned 64-bit/8-byte value from @stream.
592 * In order to get the correct byte order for this read operation,
593 * see g_data_input_stream_get_byte_order().
595 * If @cancellable is not %NULL, then the operation can be cancelled by
596 * triggering the cancellable object from another thread. If the operation
597 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
599 * Returns: an unsigned 64-bit/8-byte read from @stream or %0 if
603 g_data_input_stream_read_uint64 (GDataInputStream *stream,
604 GCancellable *cancellable,
609 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
611 if (read_data (stream, &v, 8, cancellable, error))
613 switch (stream->priv->byte_order)
615 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
616 v = GUINT64_FROM_BE (v);
618 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
619 v = GUINT64_FROM_LE (v);
621 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
632 scan_for_newline (GDataInputStream *stream,
634 gboolean *last_saw_cr_out,
635 int *newline_len_out)
637 GBufferedInputStream *bstream;
638 GDataInputStreamPrivate *priv;
640 gsize start, end, peeked;
644 gsize available, checked;
645 gboolean last_saw_cr;
649 bstream = G_BUFFERED_INPUT_STREAM (stream);
651 checked = *checked_out;
652 last_saw_cr = *last_saw_cr_out;
657 buffer = (const char*)g_buffered_input_stream_peek_buffer (bstream, &available) + start;
659 peeked = end - start;
661 for (i = 0; checked < available && i < peeked; i++)
663 switch (priv->newline_type)
665 case G_DATA_STREAM_NEWLINE_TYPE_LF:
668 found_pos = start + i;
672 case G_DATA_STREAM_NEWLINE_TYPE_CR:
675 found_pos = start + i;
679 case G_DATA_STREAM_NEWLINE_TYPE_CR_LF:
680 if (last_saw_cr && buffer[i] == 10)
682 found_pos = start + i - 1;
687 case G_DATA_STREAM_NEWLINE_TYPE_ANY:
688 if (buffer[i] == 10) /* LF */
693 found_pos = start + i - 1;
699 found_pos = start + i;
703 else if (last_saw_cr)
705 /* Last was cr, this is not LF, end is CR */
706 found_pos = start + i - 1;
709 /* Don't check for CR here, instead look at last_saw_cr on next byte */
713 last_saw_cr = (buffer[i] == 13);
717 *newline_len_out = newline_len;
724 *checked_out = checked;
725 *last_saw_cr_out = last_saw_cr;
731 * g_data_input_stream_read_line:
732 * @stream: a given #GDataInputStream.
733 * @length: a #gsize to get the length of the data read in.
734 * @cancellable: optional #GCancellable object, %NULL to ignore.
735 * @error: #GError for error reporting.
737 * Reads a line from the data input stream.
739 * If @cancellable is not %NULL, then the operation can be cancelled by
740 * triggering the cancellable object from another thread. If the operation
741 * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
743 * Returns: a string with the line that was read in (without the newlines).
744 * Set @length to a #gsize to get the length of the read line.
745 * On an error, it will return %NULL and @error will be set. If there's no
746 * content to read, it will still return %NULL, but @error won't be set.
749 g_data_input_stream_read_line (GDataInputStream *stream,
751 GCancellable *cancellable,
754 GBufferedInputStream *bstream;
756 gboolean last_saw_cr;
762 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), NULL);
764 bstream = G_BUFFERED_INPUT_STREAM (stream);
770 while ((found_pos = scan_for_newline (stream, &checked, &last_saw_cr, &newline_len)) == -1)
772 if (g_buffered_input_stream_get_available (bstream) ==
773 g_buffered_input_stream_get_buffer_size (bstream))
774 g_buffered_input_stream_set_buffer_size (bstream,
775 2 * g_buffered_input_stream_get_buffer_size (bstream));
777 res = g_buffered_input_stream_fill (bstream, -1, cancellable, error);
783 if (g_buffered_input_stream_get_available (bstream) == 0)
798 line = g_malloc (found_pos + newline_len + 1);
800 res = g_input_stream_read (G_INPUT_STREAM (stream),
802 found_pos + newline_len,
805 *length = (gsize)found_pos;
806 g_warn_if_fail (res == found_pos + newline_len);
813 scan_for_chars (GDataInputStream *stream,
815 const char *stop_chars,
816 gssize stop_chars_len)
818 GBufferedInputStream *bstream;
820 gsize start, end, peeked;
822 gsize available, checked;
823 const char *stop_char;
824 const char *stop_end;
826 bstream = G_BUFFERED_INPUT_STREAM (stream);
827 stop_end = stop_chars + stop_chars_len;
829 checked = *checked_out;
832 buffer = (const char *)g_buffered_input_stream_peek_buffer (bstream, &available) + start;
834 peeked = end - start;
836 for (i = 0; checked < available && i < peeked; i++)
838 for (stop_char = stop_chars; stop_char != stop_end; stop_char++)
840 if (buffer[i] == *stop_char)
847 *checked_out = checked;
852 * g_data_input_stream_read_until:
853 * @stream: a given #GDataInputStream.
854 * @stop_chars: characters to terminate the read.
855 * @length: a #gsize to get the length of the data read in.
856 * @cancellable: optional #GCancellable object, %NULL to ignore.
857 * @error: #GError for error reporting.
859 * Reads a string from the data input stream, up to the first
860 * occurrence of any of the stop characters.
862 * Note that, in contrast to g_data_input_stream_read_until_async(),
863 * this function consumes the stop character that it finds.
865 * Don't use this function in new code. Its functionality is
866 * inconsistent with g_data_input_stream_read_until_async(). Both
867 * functions will be marked as deprecated in a future release. Use
868 * g_data_input_stream_read_upto() instead, but note that that function
869 * does not consume the stop character.
871 * Returns: a string with the data that was read before encountering
872 * any of the stop characters. Set @length to a #gsize to get the length
873 * of the string. This function will return %NULL on an error.
876 g_data_input_stream_read_until (GDataInputStream *stream,
877 const gchar *stop_chars,
879 GCancellable *cancellable,
882 GBufferedInputStream *bstream;
885 bstream = G_BUFFERED_INPUT_STREAM (stream);
887 result = g_data_input_stream_read_upto (stream, stop_chars, -1,
888 length, cancellable, error);
890 /* If we're not at end of stream then we have a stop_char to consume. */
891 if (result != NULL && g_buffered_input_stream_get_available (bstream) > 0)
896 res = g_input_stream_read (G_INPUT_STREAM (stream), &b, 1, NULL, NULL);
905 GDataInputStream *stream;
906 GSimpleAsyncResult *simple;
907 gboolean last_saw_cr;
910 GCancellable *cancellable;
913 gssize stop_chars_len;
916 } GDataInputStreamReadData;
919 g_data_input_stream_read_complete (GDataInputStreamReadData *data,
922 gboolean need_idle_dispatch)
924 if (read_length || skip_length)
928 data->length = read_length;
929 data->line = g_malloc (read_length + 1);
930 data->line[read_length] = '\0';
932 /* we already checked the buffer. this shouldn't fail. */
933 bytes = g_input_stream_read (G_INPUT_STREAM (data->stream),
934 data->line, read_length, NULL, NULL);
935 g_assert_cmpint (bytes, ==, read_length);
937 bytes = g_input_stream_skip (G_INPUT_STREAM (data->stream),
938 skip_length, NULL, NULL);
939 g_assert_cmpint (bytes, ==, skip_length);
942 if (need_idle_dispatch)
943 g_simple_async_result_complete_in_idle (data->simple);
945 g_simple_async_result_complete (data->simple);
947 g_object_unref (data->simple);
951 g_data_input_stream_read_line_ready (GObject *object,
952 GAsyncResult *result,
955 GDataInputStreamReadData *data = user_data;
960 /* this is a callback. finish the async call. */
962 GBufferedInputStream *buffer = G_BUFFERED_INPUT_STREAM (data->stream);
963 GError *error = NULL;
966 bytes = g_buffered_input_stream_fill_finish (buffer, result, &error);
973 g_simple_async_result_set_from_error (data->simple, error);
974 g_error_free (error);
978 g_data_input_stream_read_complete (data, data->checked, 0, FALSE);
982 /* only proceed if we got more bytes... */
985 if (data->stop_chars)
987 found_pos = scan_for_chars (data->stream,
990 data->stop_chars_len);
994 found_pos = scan_for_newline (data->stream, &data->checked,
995 &data->last_saw_cr, &newline_len);
998 /* didn't find a full line; need to buffer some more bytes */
1000 GBufferedInputStream *buffer = G_BUFFERED_INPUT_STREAM (data->stream);
1003 size = g_buffered_input_stream_get_buffer_size (buffer);
1005 if (g_buffered_input_stream_get_available (buffer) == size)
1006 /* need to grow the buffer */
1007 g_buffered_input_stream_set_buffer_size (buffer, size * 2);
1010 g_buffered_input_stream_fill_async (buffer, -1, data->io_priority,
1012 g_data_input_stream_read_line_ready,
1017 /* read the line and the EOL. no error is possible. */
1018 g_data_input_stream_read_complete (data, found_pos,
1019 newline_len, result == NULL);
1024 g_data_input_stream_read_data_free (gpointer user_data)
1026 GDataInputStreamReadData *data = user_data;
1028 /* we don't hold a ref to ->simple because it keeps a ref to us.
1029 * we are called because it is being finalized.
1032 g_free (data->stop_chars);
1033 if (data->cancellable)
1034 g_object_unref (data->cancellable);
1035 g_free (data->line);
1036 g_slice_free (GDataInputStreamReadData, data);
1040 g_data_input_stream_read_async (GDataInputStream *stream,
1041 const gchar *stop_chars,
1042 gssize stop_chars_len,
1044 GCancellable *cancellable,
1045 GAsyncReadyCallback callback,
1047 gpointer source_tag)
1049 GDataInputStreamReadData *data;
1051 data = g_slice_new (GDataInputStreamReadData);
1052 data->stream = stream;
1054 g_object_ref (cancellable);
1055 data->cancellable = cancellable;
1056 if (stop_chars_len == -1)
1057 stop_chars_len = strlen (stop_chars);
1058 data->stop_chars = g_memdup (stop_chars, stop_chars_len);
1059 data->stop_chars_len = stop_chars_len;
1060 data->io_priority = io_priority;
1061 data->last_saw_cr = FALSE;
1065 data->simple = g_simple_async_result_new (G_OBJECT (stream), callback,
1066 user_data, source_tag);
1067 g_simple_async_result_set_op_res_gpointer (data->simple, data,
1068 g_data_input_stream_read_data_free);
1069 g_data_input_stream_read_line_ready (NULL, NULL, data);
1073 g_data_input_stream_read_finish (GDataInputStream *stream,
1074 GAsyncResult *result,
1078 GDataInputStreamReadData *data;
1079 GSimpleAsyncResult *simple;
1082 simple = G_SIMPLE_ASYNC_RESULT (result);
1084 if (g_simple_async_result_propagate_error (simple, error))
1087 data = g_simple_async_result_get_op_res_gpointer (simple);
1093 *length = data->length;
1099 * g_data_input_stream_read_line_async:
1100 * @stream: a given #GDataInputStream.
1101 * @io_priority: the <link linkend="io-priority">I/O priority</link>
1103 * @cancellable: optional #GCancellable object, %NULL to ignore.
1104 * @callback: callback to call when the request is satisfied.
1105 * @user_data: the data to pass to callback function.
1107 * The asynchronous version of g_data_input_stream_read_line(). It is
1108 * an error to have two outstanding calls to this function.
1110 * When the operation is finished, @callback will be called. You
1111 * can then call g_data_input_stream_read_line_finish() to get
1112 * the result of the operation.
1117 g_data_input_stream_read_line_async (GDataInputStream *stream,
1119 GCancellable *cancellable,
1120 GAsyncReadyCallback callback,
1123 g_return_if_fail (G_IS_DATA_INPUT_STREAM (stream));
1124 g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
1126 g_data_input_stream_read_async (stream, NULL, 0, io_priority,
1127 cancellable, callback, user_data,
1128 g_data_input_stream_read_line_async);
1132 * g_data_input_stream_read_until_async:
1133 * @stream: a given #GDataInputStream.
1134 * @stop_chars: characters to terminate the read.
1135 * @io_priority: the <link linkend="io-priority">I/O priority</link>
1137 * @cancellable: optional #GCancellable object, %NULL to ignore.
1138 * @callback: callback to call when the request is satisfied.
1139 * @user_data: the data to pass to callback function.
1141 * The asynchronous version of g_data_input_stream_read_until().
1142 * It is an error to have two outstanding calls to this function.
1144 * Note that, in contrast to g_data_input_stream_read_until(),
1145 * this function does not consume the stop character that it finds. You
1146 * must read it for yourself.
1148 * When the operation is finished, @callback will be called. You
1149 * can then call g_data_input_stream_read_until_finish() to get
1150 * the result of the operation.
1152 * Don't use this function in new code. Its functionality is
1153 * inconsistent with g_data_input_stream_read_until(). Both functions
1154 * will be marked as deprecated in a future release. Use
1155 * g_data_input_stream_read_upto_async() instead.
1160 g_data_input_stream_read_until_async (GDataInputStream *stream,
1161 const gchar *stop_chars,
1163 GCancellable *cancellable,
1164 GAsyncReadyCallback callback,
1167 g_return_if_fail (G_IS_DATA_INPUT_STREAM (stream));
1168 g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
1169 g_return_if_fail (stop_chars != NULL);
1171 g_data_input_stream_read_async (stream, stop_chars, -1, io_priority,
1172 cancellable, callback, user_data,
1173 g_data_input_stream_read_until_async);
1177 * g_data_input_stream_read_line_finish:
1178 * @stream: a given #GDataInputStream.
1179 * @result: the #GAsyncResult that was provided to the callback.
1180 * @length: a #gsize to get the length of the data read in.
1181 * @error: #GError for error reporting.
1183 * Finish an asynchronous call started by
1184 * g_data_input_stream_read_line_async().
1186 * Returns: a string with the line that was read in (without the newlines).
1187 * Set @length to a #gsize to get the length of the read line.
1188 * On an error, it will return %NULL and @error will be set. If there's no
1189 * content to read, it will still return %NULL, but @error won't be set.
1194 g_data_input_stream_read_line_finish (GDataInputStream *stream,
1195 GAsyncResult *result,
1199 g_return_val_if_fail (
1200 g_simple_async_result_is_valid (result, G_OBJECT (stream),
1201 g_data_input_stream_read_line_async), NULL);
1203 return g_data_input_stream_read_finish (stream, result, length, error);
1207 * g_data_input_stream_read_until_finish:
1208 * @stream: a given #GDataInputStream.
1209 * @result: the #GAsyncResult that was provided to the callback.
1210 * @length: a #gsize to get the length of the data read in.
1211 * @error: #GError for error reporting.
1213 * Finish an asynchronous call started by
1214 * g_data_input_stream_read_until_async().
1218 * Returns: a string with the data that was read before encountering
1219 * any of the stop characters. Set @length to a #gsize to get the length
1220 * of the string. This function will return %NULL on an error.
1223 g_data_input_stream_read_until_finish (GDataInputStream *stream,
1224 GAsyncResult *result,
1228 g_return_val_if_fail (
1229 g_simple_async_result_is_valid (result, G_OBJECT (stream),
1230 g_data_input_stream_read_until_async), NULL);
1232 return g_data_input_stream_read_finish (stream, result, length, error);
1236 * g_data_input_stream_read_upto:
1237 * @stream: a #GDataInputStream
1238 * @stop_chars: characters to terminate the read
1239 * @stop_chars_len: length of @stop_chars. May be -1 if @stop_chars is
1241 * @length: a #gsize to get the length of the data read in
1242 * @cancellable: optional #GCancellable object, %NULL to ignore
1243 * @error: #GError for error reporting
1245 * Reads a string from the data input stream, up to the first
1246 * occurrence of any of the stop characters.
1248 * In contrast to g_data_input_stream_read_until(), this function
1249 * does <emphasis>not</emphasis> consume the stop character. You have
1250 * to use g_data_input_stream_read_byte() to get it before calling
1251 * g_data_input_stream_read_upto() again.
1253 * Note that @stop_chars may contain '\0' if @stop_chars_len is
1256 * Returns: a string with the data that was read before encountering
1257 * any of the stop characters. Set @length to a #gsize to get the length
1258 * of the string. This function will return %NULL on an error
1263 g_data_input_stream_read_upto (GDataInputStream *stream,
1264 const gchar *stop_chars,
1265 gssize stop_chars_len,
1267 GCancellable *cancellable,
1270 GBufferedInputStream *bstream;
1276 g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), NULL);
1278 if (stop_chars_len < 0)
1279 stop_chars_len = strlen (stop_chars);
1281 bstream = G_BUFFERED_INPUT_STREAM (stream);
1285 while ((found_pos = scan_for_chars (stream, &checked, stop_chars, stop_chars_len)) == -1)
1287 if (g_buffered_input_stream_get_available (bstream) ==
1288 g_buffered_input_stream_get_buffer_size (bstream))
1289 g_buffered_input_stream_set_buffer_size (bstream,
1290 2 * g_buffered_input_stream_get_buffer_size (bstream));
1292 res = g_buffered_input_stream_fill (bstream, -1, cancellable, error);
1298 if (g_buffered_input_stream_get_available (bstream) == 0)
1306 found_pos = checked;
1312 data_until = g_malloc (found_pos + 1);
1314 res = g_input_stream_read (G_INPUT_STREAM (stream),
1319 *length = (gsize)found_pos;
1320 g_warn_if_fail (res == found_pos);
1321 data_until[found_pos] = 0;
1327 * g_data_input_stream_read_upto_async:
1328 * @stream: a #GDataInputStream
1329 * @stop_chars: characters to terminate the read
1330 * @stop_chars_len: length of @stop_chars. May be -1 if @stop_chars is
1332 * @cancellable: optional #GCancellable object, %NULL to ignore
1333 * @callback: callback to call when the request is satisfied
1334 * @user_data: the data to pass to callback function
1336 * The asynchronous version of g_data_input_stream_read_upto().
1337 * It is an error to have two outstanding calls to this function.
1339 * In contrast to g_data_input_stream_read_until(), this function
1340 * does <emphasis>not</emphasis> consume the stop character. You have
1341 * to use g_data_input_stream_read_byte() to get it before calling
1342 * g_data_input_stream_read_upto() again.
1344 * Note that @stop_chars may contain '\0' if @stop_chars_len is
1347 * When the operation is finished, @callback will be called. You
1348 * can then call g_data_input_stream_read_upto_finish() to get
1349 * the result of the operation.
1354 g_data_input_stream_read_upto_async (GDataInputStream *stream,
1355 const gchar *stop_chars,
1356 gssize stop_chars_len,
1358 GCancellable *cancellable,
1359 GAsyncReadyCallback callback,
1362 g_return_if_fail (G_IS_DATA_INPUT_STREAM (stream));
1363 g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
1364 g_return_if_fail (stop_chars != NULL);
1366 g_data_input_stream_read_async (stream, stop_chars, stop_chars_len, io_priority,
1367 cancellable, callback, user_data,
1368 g_data_input_stream_read_upto_async);
1372 * g_data_input_stream_read_upto_finish:
1373 * @stream: a #GDataInputStream
1374 * @result: the #GAsyncResult that was provided to the callback
1375 * @length: a #gsize to get the length of the data read in
1376 * @error: #GError for error reporting
1378 * Finish an asynchronous call started by
1379 * g_data_input_stream_read_upto_async().
1381 * Note that this function does <emphasis>not</emphasis> consume the
1382 * stop character. You have to use g_data_input_stream_read_byte() to
1383 * get it before calling g_data_input_stream_read_upto_async() again.
1385 * Returns: a string with the data that was read before encountering
1386 * any of the stop characters. Set @length to a #gsize to get the length
1387 * of the string. This function will return %NULL on an error.
1392 g_data_input_stream_read_upto_finish (GDataInputStream *stream,
1393 GAsyncResult *result,
1397 g_return_val_if_fail (
1398 g_simple_async_result_is_valid (result, G_OBJECT (stream),
1399 g_data_input_stream_read_upto_async), NULL);
1401 return g_data_input_stream_read_finish (stream, result, length, error);