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3d93bf6968
2008-07-01 Cody Russell <bratsche@gnome.org> * gio/gioenums.h: * gio/giotypes.h: Moved all relevant typedefs into these files. * gio/*.[ch]: Updated wrt added files. Split types into separate file for easier maintainership. (#538564) svn path=/trunk/; revision=7127
931 lines
24 KiB
C
931 lines
24 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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* Copyright (C) 2007 Jürg Billeter
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include "config.h"
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#include "gdatainputstream.h"
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#include "gioenumtypes.h"
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#include "gioerror.h"
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#include "glibintl.h"
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#include "gioalias.h"
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/**
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* SECTION:gdatainputstream
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* @short_description: Data Input Stream
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* @include: gio/gio.h
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* @see_also: #GInputStream
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*
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* Data input stream implements #GInputStream and includes functions for
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* reading structured data directly from a binary input stream.
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*
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**/
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struct _GDataInputStreamPrivate {
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GDataStreamByteOrder byte_order;
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GDataStreamNewlineType newline_type;
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};
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enum {
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PROP_0,
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PROP_BYTE_ORDER,
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PROP_NEWLINE_TYPE
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};
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static void g_data_input_stream_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void g_data_input_stream_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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G_DEFINE_TYPE (GDataInputStream,
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g_data_input_stream,
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G_TYPE_BUFFERED_INPUT_STREAM)
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static void
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g_data_input_stream_class_init (GDataInputStreamClass *klass)
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{
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GObjectClass *object_class;
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g_type_class_add_private (klass, sizeof (GDataInputStreamPrivate));
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object_class = G_OBJECT_CLASS (klass);
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object_class->get_property = g_data_input_stream_get_property;
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object_class->set_property = g_data_input_stream_set_property;
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/**
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* GDataStream:byte-order:
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*
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* The ::byte-order property determines the byte ordering that
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* is used when reading multi-byte entities (such as integers)
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* from the stream.
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*/
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g_object_class_install_property (object_class,
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PROP_BYTE_ORDER,
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g_param_spec_enum ("byte-order",
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P_("Byte order"),
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P_("The byte order"),
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G_TYPE_DATA_STREAM_BYTE_ORDER,
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G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN,
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G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_BLURB));
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/**
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* GDataStream:newline-type:
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*
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* The :newline-type property determines what is considered
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* as a line ending when reading complete lines from the stream.
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*/
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g_object_class_install_property (object_class,
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PROP_NEWLINE_TYPE,
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g_param_spec_enum ("newline-type",
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P_("Newline type"),
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P_("The accepted types of line ending"),
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G_TYPE_DATA_STREAM_NEWLINE_TYPE,
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G_DATA_STREAM_NEWLINE_TYPE_LF,
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G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_BLURB));
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}
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static void
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g_data_input_stream_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GDataInputStreamPrivate *priv;
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GDataInputStream *dstream;
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dstream = G_DATA_INPUT_STREAM (object);
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priv = dstream->priv;
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switch (prop_id)
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{
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case PROP_BYTE_ORDER:
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g_data_input_stream_set_byte_order (dstream, g_value_get_enum (value));
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break;
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case PROP_NEWLINE_TYPE:
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g_data_input_stream_set_newline_type (dstream, g_value_get_enum (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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g_data_input_stream_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GDataInputStreamPrivate *priv;
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GDataInputStream *dstream;
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dstream = G_DATA_INPUT_STREAM (object);
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priv = dstream->priv;
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switch (prop_id)
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{
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case PROP_BYTE_ORDER:
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g_value_set_enum (value, priv->byte_order);
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break;
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case PROP_NEWLINE_TYPE:
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g_value_set_enum (value, priv->newline_type);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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g_data_input_stream_init (GDataInputStream *stream)
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{
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stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
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G_TYPE_DATA_INPUT_STREAM,
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GDataInputStreamPrivate);
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stream->priv->byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
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stream->priv->newline_type = G_DATA_STREAM_NEWLINE_TYPE_LF;
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}
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/**
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* g_data_input_stream_new:
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* @base_stream: a #GInputStream.
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*
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* Creates a new data input stream for the @base_stream.
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*
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* Returns: a new #GDataInputStream.
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**/
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GDataInputStream *
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g_data_input_stream_new (GInputStream *base_stream)
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{
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GDataInputStream *stream;
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g_return_val_if_fail (G_IS_INPUT_STREAM (base_stream), NULL);
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stream = g_object_new (G_TYPE_DATA_INPUT_STREAM,
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"base-stream", base_stream,
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NULL);
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return stream;
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}
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/**
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* g_data_input_stream_set_byte_order:
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* @stream: a given #GDataInputStream.
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* @order: a #GDataStreamByteOrder to set.
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*
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* This function sets the byte order for the given @stream. All subsequent
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* reads from the @stream will be read in the given @order.
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*
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**/
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void
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g_data_input_stream_set_byte_order (GDataInputStream *stream,
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GDataStreamByteOrder order)
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{
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GDataInputStreamPrivate *priv;
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g_return_if_fail (G_IS_DATA_INPUT_STREAM (stream));
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priv = stream->priv;
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if (priv->byte_order != order)
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{
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priv->byte_order = order;
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g_object_notify (G_OBJECT (stream), "byte-order");
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}
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}
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/**
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* g_data_input_stream_get_byte_order:
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* @stream: a given #GDataInputStream.
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*
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* Gets the byte order for the data input stream.
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*
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* Returns: the @stream's current #GDataStreamByteOrder.
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**/
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GDataStreamByteOrder
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g_data_input_stream_get_byte_order (GDataInputStream *stream)
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{
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g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN);
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return stream->priv->byte_order;
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}
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/**
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* g_data_input_stream_set_newline_type:
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* @stream: a #GDataInputStream.
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* @type: the type of new line return as #GDataStreamNewlineType.
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*
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* Sets the newline type for the @stream.
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*
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* Note that using G_DATA_STREAM_NEWLINE_TYPE_ANY is slightly unsafe. If a read
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* chunk ends in "CR" we must read an additional byte to know if this is "CR" or
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* "CR LF", and this might block if there is no more data availible.
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*
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**/
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void
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g_data_input_stream_set_newline_type (GDataInputStream *stream,
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GDataStreamNewlineType type)
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{
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GDataInputStreamPrivate *priv;
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g_return_if_fail (G_IS_DATA_INPUT_STREAM (stream));
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priv = stream->priv;
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if (priv->newline_type != type)
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{
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priv->newline_type = type;
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g_object_notify (G_OBJECT (stream), "newline-type");
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}
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}
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/**
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* g_data_input_stream_get_newline_type:
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* @stream: a given #GDataInputStream.
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*
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* Gets the current newline type for the @stream.
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*
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* Returns: #GDataStreamNewlineType for the given @stream.
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**/
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GDataStreamNewlineType
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g_data_input_stream_get_newline_type (GDataInputStream *stream)
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{
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g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), G_DATA_STREAM_NEWLINE_TYPE_ANY);
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return stream->priv->newline_type;
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}
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static gboolean
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read_data (GDataInputStream *stream,
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void *buffer,
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gsize size,
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GCancellable *cancellable,
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GError **error)
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{
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gsize available;
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gssize res;
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while ((available = g_buffered_input_stream_get_available (G_BUFFERED_INPUT_STREAM (stream))) < size)
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{
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res = g_buffered_input_stream_fill (G_BUFFERED_INPUT_STREAM (stream),
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size - available,
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cancellable, error);
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if (res < 0)
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return FALSE;
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if (res == 0)
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{
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g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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_("Unexpected early end-of-stream"));
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return FALSE;
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}
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}
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/* This should always succeed, since its in the buffer */
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res = g_input_stream_read (G_INPUT_STREAM (stream),
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buffer, size,
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NULL, NULL);
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g_warn_if_fail (res == size);
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return TRUE;
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}
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/**
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* g_data_input_stream_read_byte:
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* @stream: a given #GDataInputStream.
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @error: #GError for error reporting.
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*
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* Reads an unsigned 8-bit/1-byte value from @stream.
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*
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* Returns: an unsigned 8-bit/1-byte value read from the @stream or %0
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* if an error occurred.
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**/
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guchar
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g_data_input_stream_read_byte (GDataInputStream *stream,
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GCancellable *cancellable,
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GError **error)
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{
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guchar c;
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g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), '\0');
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if (read_data (stream, &c, 1, cancellable, error))
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return c;
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return 0;
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}
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/**
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* g_data_input_stream_read_int16:
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* @stream: a given #GDataInputStream.
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @error: #GError for error reporting.
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*
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* Reads a 16-bit/2-byte value from @stream.
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*
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* In order to get the correct byte order for this read operation,
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* see g_data_stream_get_byte_order() and g_data_stream_set_byte_order().
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*
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* Returns: a signed 16-bit/2-byte value read from @stream or %0 if
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* an error occurred.
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**/
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gint16
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g_data_input_stream_read_int16 (GDataInputStream *stream,
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GCancellable *cancellable,
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GError **error)
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{
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gint16 v;
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g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
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if (read_data (stream, &v, 2, cancellable, error))
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{
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switch (stream->priv->byte_order)
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{
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case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
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v = GINT16_FROM_BE (v);
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break;
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case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
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v = GINT16_FROM_LE (v);
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break;
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case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
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default:
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break;
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}
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return v;
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}
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return 0;
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}
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/**
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* g_data_input_stream_read_uint16:
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* @stream: a given #GDataInputStream.
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @error: #GError for error reporting.
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*
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* Reads an unsigned 16-bit/2-byte value from @stream.
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*
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* In order to get the correct byte order for this read operation,
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* see g_data_stream_get_byte_order() and g_data_stream_set_byte_order().
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*
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* Returns: an unsigned 16-bit/2-byte value read from the @stream or %0 if
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* an error occurred.
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**/
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guint16
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g_data_input_stream_read_uint16 (GDataInputStream *stream,
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GCancellable *cancellable,
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GError **error)
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{
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guint16 v;
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g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
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if (read_data (stream, &v, 2, cancellable, error))
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{
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switch (stream->priv->byte_order)
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{
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case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
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v = GUINT16_FROM_BE (v);
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break;
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case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
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v = GUINT16_FROM_LE (v);
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break;
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case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
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default:
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break;
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}
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return v;
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}
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return 0;
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}
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/**
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* g_data_input_stream_read_int32:
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* @stream: a given #GDataInputStream.
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @error: #GError for error reporting.
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*
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* Reads a signed 32-bit/4-byte value from @stream.
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*
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* In order to get the correct byte order for this read operation,
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* see g_data_stream_get_byte_order() and g_data_stream_set_byte_order().
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*
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* If @cancellable is not %NULL, then the operation can be cancelled by
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* triggering the cancellable object from another thread. If the operation
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* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
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*
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* Returns: a signed 32-bit/4-byte value read from the @stream or %0 if
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* an error occurred.
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**/
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gint32
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g_data_input_stream_read_int32 (GDataInputStream *stream,
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GCancellable *cancellable,
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GError **error)
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{
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gint32 v;
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g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
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if (read_data (stream, &v, 4, cancellable, error))
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{
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switch (stream->priv->byte_order)
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{
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case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
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v = GINT32_FROM_BE (v);
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break;
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case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
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v = GINT32_FROM_LE (v);
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break;
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case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
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default:
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break;
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}
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return v;
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}
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return 0;
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}
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|
|
|
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/**
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* g_data_input_stream_read_uint32:
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* @stream: a given #GDataInputStream.
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @error: #GError for error reporting.
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*
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* Reads an unsigned 32-bit/4-byte value from @stream.
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*
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* In order to get the correct byte order for this read operation,
|
|
* see g_data_stream_get_byte_order() and g_data_stream_set_byte_order().
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*
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* If @cancellable is not %NULL, then the operation can be cancelled by
|
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* triggering the cancellable object from another thread. If the operation
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* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
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*
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* Returns: an unsigned 32-bit/4-byte value read from the @stream or %0 if
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* an error occurred.
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**/
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guint32
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g_data_input_stream_read_uint32 (GDataInputStream *stream,
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GCancellable *cancellable,
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GError **error)
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{
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guint32 v;
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g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
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|
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if (read_data (stream, &v, 4, cancellable, error))
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{
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switch (stream->priv->byte_order)
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{
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case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
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v = GUINT32_FROM_BE (v);
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break;
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case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
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v = GUINT32_FROM_LE (v);
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break;
|
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case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
|
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default:
|
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break;
|
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}
|
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return v;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* g_data_input_stream_read_int64:
|
|
* @stream: a given #GDataInputStream.
|
|
* @cancellable: optional #GCancellable object, %NULL to ignore.
|
|
* @error: #GError for error reporting.
|
|
*
|
|
* Reads a 64-bit/8-byte value from @stream.
|
|
*
|
|
* In order to get the correct byte order for this read operation,
|
|
* see g_data_stream_get_byte_order() and g_data_stream_set_byte_order().
|
|
*
|
|
* If @cancellable is not %NULL, then the operation can be cancelled by
|
|
* triggering the cancellable object from another thread. If the operation
|
|
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
|
|
*
|
|
* Returns: a signed 64-bit/8-byte value read from @stream or %0 if
|
|
* an error occurred.
|
|
**/
|
|
gint64
|
|
g_data_input_stream_read_int64 (GDataInputStream *stream,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
gint64 v;
|
|
|
|
g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
|
|
|
|
if (read_data (stream, &v, 8, cancellable, error))
|
|
{
|
|
switch (stream->priv->byte_order)
|
|
{
|
|
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
|
|
v = GINT64_FROM_BE (v);
|
|
break;
|
|
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
|
|
v = GINT64_FROM_LE (v);
|
|
break;
|
|
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
|
|
default:
|
|
break;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* g_data_input_stream_read_uint64:
|
|
* @stream: a given #GDataInputStream.
|
|
* @cancellable: optional #GCancellable object, %NULL to ignore.
|
|
* @error: #GError for error reporting.
|
|
*
|
|
* Reads an unsigned 64-bit/8-byte value from @stream.
|
|
*
|
|
* In order to get the correct byte order for this read operation,
|
|
* see g_data_stream_get_byte_order().
|
|
*
|
|
* If @cancellable is not %NULL, then the operation can be cancelled by
|
|
* triggering the cancellable object from another thread. If the operation
|
|
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
|
|
*
|
|
* Returns: an unsigned 64-bit/8-byte read from @stream or %0 if
|
|
* an error occurred.
|
|
**/
|
|
guint64
|
|
g_data_input_stream_read_uint64 (GDataInputStream *stream,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
guint64 v;
|
|
|
|
g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), 0);
|
|
|
|
if (read_data (stream, &v, 8, cancellable, error))
|
|
{
|
|
switch (stream->priv->byte_order)
|
|
{
|
|
case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
|
|
v = GUINT64_FROM_BE (v);
|
|
break;
|
|
case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
|
|
v = GUINT64_FROM_LE (v);
|
|
break;
|
|
case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
|
|
default:
|
|
break;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static gssize
|
|
scan_for_newline (GDataInputStream *stream,
|
|
gsize *checked_out,
|
|
gboolean *last_saw_cr_out,
|
|
int *newline_len_out)
|
|
{
|
|
GBufferedInputStream *bstream;
|
|
GDataInputStreamPrivate *priv;
|
|
const char *buffer;
|
|
gsize start, end, peeked;
|
|
int i;
|
|
gssize found_pos;
|
|
int newline_len;
|
|
gsize available, checked;
|
|
gboolean last_saw_cr;
|
|
|
|
priv = stream->priv;
|
|
|
|
bstream = G_BUFFERED_INPUT_STREAM (stream);
|
|
|
|
checked = *checked_out;
|
|
last_saw_cr = *last_saw_cr_out;
|
|
found_pos = -1;
|
|
newline_len = 0;
|
|
|
|
start = checked;
|
|
buffer = (const char*)g_buffered_input_stream_peek_buffer (bstream, &available) + start;
|
|
end = available;
|
|
peeked = end - start;
|
|
|
|
for (i = 0; checked < available && i < peeked; i++)
|
|
{
|
|
switch (priv->newline_type)
|
|
{
|
|
case G_DATA_STREAM_NEWLINE_TYPE_LF:
|
|
if (buffer[i] == 10)
|
|
{
|
|
found_pos = start + i;
|
|
newline_len = 1;
|
|
}
|
|
break;
|
|
case G_DATA_STREAM_NEWLINE_TYPE_CR:
|
|
if (buffer[i] == 13)
|
|
{
|
|
found_pos = start + i;
|
|
newline_len = 1;
|
|
}
|
|
break;
|
|
case G_DATA_STREAM_NEWLINE_TYPE_CR_LF:
|
|
if (last_saw_cr && buffer[i] == 10)
|
|
{
|
|
found_pos = start + i - 1;
|
|
newline_len = 2;
|
|
}
|
|
break;
|
|
default:
|
|
case G_DATA_STREAM_NEWLINE_TYPE_ANY:
|
|
if (buffer[i] == 10) /* LF */
|
|
{
|
|
if (last_saw_cr)
|
|
{
|
|
/* CR LF */
|
|
found_pos = start + i - 1;
|
|
newline_len = 2;
|
|
}
|
|
else
|
|
{
|
|
/* LF */
|
|
found_pos = start + i;
|
|
newline_len = 1;
|
|
}
|
|
}
|
|
else if (last_saw_cr)
|
|
{
|
|
/* Last was cr, this is not LF, end is CR */
|
|
found_pos = start + i - 1;
|
|
newline_len = 1;
|
|
}
|
|
/* Don't check for CR here, instead look at last_saw_cr on next byte */
|
|
break;
|
|
}
|
|
|
|
last_saw_cr = (buffer[i] == 13);
|
|
|
|
if (found_pos != -1)
|
|
{
|
|
*newline_len_out = newline_len;
|
|
return found_pos;
|
|
}
|
|
}
|
|
|
|
checked = end;
|
|
|
|
*checked_out = checked;
|
|
*last_saw_cr_out = last_saw_cr;
|
|
return -1;
|
|
}
|
|
|
|
|
|
/**
|
|
* g_data_input_stream_read_line:
|
|
* @stream: a given #GDataInputStream.
|
|
* @length: a #gsize to get the length of the data read in.
|
|
* @cancellable: optional #GCancellable object, %NULL to ignore.
|
|
* @error: #GError for error reporting.
|
|
*
|
|
* Reads a line from the data input stream.
|
|
*
|
|
* If @cancellable is not %NULL, then the operation can be cancelled by
|
|
* triggering the cancellable object from another thread. If the operation
|
|
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
|
|
*
|
|
* Returns: a string with the line that was read in (including the newlines).
|
|
* Set @length to a #gsize to get the length of the read line. Returns %NULL on an error.
|
|
**/
|
|
char *
|
|
g_data_input_stream_read_line (GDataInputStream *stream,
|
|
gsize *length,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
GBufferedInputStream *bstream;
|
|
gsize checked;
|
|
gboolean last_saw_cr;
|
|
gssize found_pos;
|
|
gssize res;
|
|
int newline_len;
|
|
char *line;
|
|
|
|
g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), NULL);
|
|
|
|
bstream = G_BUFFERED_INPUT_STREAM (stream);
|
|
|
|
newline_len = 0;
|
|
checked = 0;
|
|
last_saw_cr = FALSE;
|
|
|
|
while ((found_pos = scan_for_newline (stream, &checked, &last_saw_cr, &newline_len)) == -1)
|
|
{
|
|
if (g_buffered_input_stream_get_available (bstream) ==
|
|
g_buffered_input_stream_get_buffer_size (bstream))
|
|
g_buffered_input_stream_set_buffer_size (bstream,
|
|
2 * g_buffered_input_stream_get_buffer_size (bstream));
|
|
|
|
res = g_buffered_input_stream_fill (bstream, -1, cancellable, error);
|
|
if (res < 0)
|
|
return NULL;
|
|
if (res == 0)
|
|
{
|
|
/* End of stream */
|
|
if (g_buffered_input_stream_get_available (bstream) == 0)
|
|
{
|
|
if (length)
|
|
*length = 0;
|
|
return NULL;
|
|
}
|
|
else
|
|
{
|
|
found_pos = checked;
|
|
newline_len = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
line = g_malloc (found_pos + newline_len + 1);
|
|
|
|
res = g_input_stream_read (G_INPUT_STREAM (stream),
|
|
line,
|
|
found_pos + newline_len,
|
|
NULL, NULL);
|
|
if (length)
|
|
*length = (gsize)found_pos;
|
|
g_warn_if_fail (res == found_pos + newline_len);
|
|
line[found_pos] = 0;
|
|
|
|
return line;
|
|
}
|
|
|
|
|
|
static gssize
|
|
scan_for_chars (GDataInputStream *stream,
|
|
gsize *checked_out,
|
|
const char *stop_chars)
|
|
{
|
|
GBufferedInputStream *bstream;
|
|
GDataInputStreamPrivate *priv;
|
|
const char *buffer;
|
|
gsize start, end, peeked;
|
|
int i;
|
|
gssize found_pos;
|
|
gsize available, checked;
|
|
const char *stop_char;
|
|
|
|
priv = stream->priv;
|
|
|
|
bstream = G_BUFFERED_INPUT_STREAM (stream);
|
|
|
|
checked = *checked_out;
|
|
found_pos = -1;
|
|
|
|
start = checked;
|
|
buffer = (const char *)g_buffered_input_stream_peek_buffer (bstream, &available) + start;
|
|
end = available;
|
|
peeked = end - start;
|
|
|
|
for (i = 0; checked < available && i < peeked; i++)
|
|
{
|
|
for (stop_char = stop_chars; *stop_char != '\0'; stop_char++)
|
|
{
|
|
if (buffer[i] == *stop_char)
|
|
return (start + i);
|
|
}
|
|
}
|
|
|
|
checked = end;
|
|
|
|
*checked_out = checked;
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* g_data_input_stream_read_until:
|
|
* @stream: a given #GDataInputStream.
|
|
* @stop_chars: characters to terminate the read.
|
|
* @length: a #gsize to get the length of the data read in.
|
|
* @cancellable: optional #GCancellable object, %NULL to ignore.
|
|
* @error: #GError for error reporting.
|
|
*
|
|
* Reads a string from the data input stream, up to the first
|
|
* occurrance of any of the stop characters.
|
|
*
|
|
* Returns: a string with the data that was read before encountering
|
|
* any of the stop characters. Set @length to a #gsize to get the length
|
|
* of the string. This function will return %NULL on an error.
|
|
**/
|
|
char *
|
|
g_data_input_stream_read_until (GDataInputStream *stream,
|
|
const gchar *stop_chars,
|
|
gsize *length,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
GBufferedInputStream *bstream;
|
|
gsize checked;
|
|
gssize found_pos;
|
|
gssize res;
|
|
int stop_char_len;
|
|
char *data_until;
|
|
|
|
g_return_val_if_fail (G_IS_DATA_INPUT_STREAM (stream), NULL);
|
|
|
|
bstream = G_BUFFERED_INPUT_STREAM (stream);
|
|
|
|
stop_char_len = 1;
|
|
checked = 0;
|
|
|
|
while ((found_pos = scan_for_chars (stream, &checked, stop_chars)) == -1)
|
|
{
|
|
if (g_buffered_input_stream_get_available (bstream) ==
|
|
g_buffered_input_stream_get_buffer_size (bstream))
|
|
g_buffered_input_stream_set_buffer_size (bstream,
|
|
2 * g_buffered_input_stream_get_buffer_size (bstream));
|
|
|
|
res = g_buffered_input_stream_fill (bstream, -1, cancellable, error);
|
|
if (res < 0)
|
|
return NULL;
|
|
if (res == 0)
|
|
{
|
|
/* End of stream */
|
|
if (g_buffered_input_stream_get_available (bstream) == 0)
|
|
{
|
|
if (length)
|
|
*length = 0;
|
|
return NULL;
|
|
}
|
|
else
|
|
{
|
|
found_pos = checked;
|
|
stop_char_len = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
data_until = g_malloc (found_pos + stop_char_len + 1);
|
|
|
|
res = g_input_stream_read (G_INPUT_STREAM (stream),
|
|
data_until,
|
|
found_pos + stop_char_len,
|
|
NULL, NULL);
|
|
if (length)
|
|
*length = (gsize)found_pos;
|
|
g_warn_if_fail (res == found_pos + stop_char_len);
|
|
data_until[found_pos] = 0;
|
|
|
|
return data_until;
|
|
}
|
|
|
|
#define __G_DATA_INPUT_STREAM_C__
|
|
#include "gioaliasdef.c"
|