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Diffstat (limited to 'camel/camel-stream-data-wrapper.c')
| -rw-r--r-- | camel/camel-stream-data-wrapper.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/camel/camel-stream-data-wrapper.c b/camel/camel-stream-data-wrapper.c new file mode 100644 index 0000000000..564571cf09 --- /dev/null +++ b/camel/camel-stream-data-wrapper.c @@ -0,0 +1,209 @@ +/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ +/* camel-stream-data-wrapper.c + * + * Copyright 1999 International GNOME Support (http://www.gnome-support.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + * + * Author: Ettore Perazzoli + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <gtk/gtk.h> + +#include "camel-stream-data-wrapper.h" + + +static CamelDataWrapperClass *parent_class = NULL; + + +/* CamelDataWrapper methods. */ + +static void +write_to_stream (CamelDataWrapper *data_wrapper, + CamelStream *output_stream) +{ +#define BUFFER_SIZE 4096 + gchar buffer[BUFFER_SIZE]; + CamelStreamDataWrapper *stream_data_wrapper; + CamelStream *input_stream; + + stream_data_wrapper = CAMEL_STREAM_DATA_WRAPPER (data_wrapper); + input_stream = stream_data_wrapper->stream; + + while (TRUE) { + gchar *p; + gint read, written; + + read = camel_stream_read (input_stream, buffer, BUFFER_SIZE); + if (read == 0) + break; + + p = buffer; + while (read > 0) { + written = camel_stream_write (output_stream, p, read); + + /* FIXME no way to report an error?! */ + if (written == -1) + break; + + p += written; + read -= written; + } + } +#undef BUFFER_SIZE +} + +static CamelStream * +get_stream (CamelDataWrapper *data_wrapper) +{ + CamelStreamDataWrapper *stream_data_wrapper; + + stream_data_wrapper = CAMEL_STREAM_DATA_WRAPPER (data_wrapper); + return stream_data_wrapper->stream; +} + + +/* GtkObject methods. */ + +static void +destroy (GtkObject *object) +{ + CamelStreamDataWrapper *stream_data_wrapper; + GtkObject *stream_object; + + stream_data_wrapper = CAMEL_STREAM_DATA_WRAPPER (object); + + stream_object = GTK_OBJECT (object); + stream_data_wrapper->stream = NULL; + + gtk_object_unref (stream_object); +} + + +/* This handles destruction of the associated CamelDataWrapper outside + CamelStreamDataWrapper, for debuggin purposes (this should never happen). */ +static void +stream_destroy_cb (GtkObject *object, + gpointer data) +{ + CamelStreamDataWrapper *wrapper; + + wrapper = CAMEL_STREAM_DATA_WRAPPER (data); + + /* Hack: when we destroy the stream ourselves, we set the `stream' + member to NULL first, so that we can recognize when this is done out + of our control. */ + if (wrapper->stream != NULL) { + g_warning ("CamelSimpleDataWrapperStream: associated CamelSimpleDataWrapper was destroyed."); + wrapper->stream = NULL; + } +} + + +static void +class_init (CamelStreamDataWrapperClass *class) +{ + GtkObjectClass *object_class; + CamelDataWrapperClass *data_wrapper_class; + + object_class = GTK_OBJECT_CLASS (class); + object_class->destroy = destroy; + + data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (class); + data_wrapper_class->write_to_stream = write_to_stream; + data_wrapper_class->get_stream = get_stream; + + parent_class = gtk_type_class (camel_data_wrapper_get_type ()); +} + +static void +init (CamelStreamDataWrapper *wrapper) +{ + wrapper->stream = NULL; +} + + +GtkType +camel_stream_data_wrapper_get_type (void) +{ + static GtkType type = 0; + + if (type == 0) { + static const GtkTypeInfo info = { + "CamelStreamDataWrapper", + sizeof (CamelStreamDataWrapper), + sizeof (CamelStreamDataWrapperClass), + (GtkClassInitFunc) class_init, + (GtkObjectInitFunc) init, + /* reserved_1 */ NULL, + /* reserved_2 */ NULL, + (GtkClassInitFunc) NULL, + }; + + type = gtk_type_unique (camel_data_wrapper_get_type (), &info); + } + + return type; +} + +/** + * camel_stream_data_wrapper_construct: + * @wrapper: A CamelStreamDataWrapper object + * @stream: A Camel stream object + * + * Construct @wrapper associating @stream to it. Notice that, after this call, + * @stream is conceptually owned by @wrapper and will be destroyed when + * @wrapper is destroyed. + **/ +void +camel_stream_data_wrapper_construct (CamelStreamDataWrapper *wrapper, + CamelStream *stream) +{ + g_return_if_fail (wrapper != NULL); + g_return_if_fail (IS_CAMEL_STREAM_DATA_WRAPPER (wrapper)); + g_return_if_fail (stream != NULL); + g_return_if_fail (IS_CAMEL_STREAM (stream)); + + wrapper->stream = stream; + gtk_signal_connect (GTK_OBJECT (stream), "destroy", + GTK_SIGNAL_FUNC (stream_destroy_cb), wrapper); +} + +/** + * camel_stream_data_wrapper_new: + * @stream: A Camel stream object + * + * Create a new stream data wrapper object for @stream. Notice that, after + * this call, @stream is conceptually owned by the new wrapper and will be + * destroyed when the wrapper is destroyed. + * + * Return value: A pointer to the new CamelStreamDataWrapper object. + **/ +CamelDataWrapper * +camel_stream_data_wrapper_new (CamelStream *stream) +{ + CamelDataWrapper *wrapper; + + wrapper = gtk_type_new (camel_stream_data_wrapper_get_type ()); + camel_stream_data_wrapper_construct + (CAMEL_STREAM_DATA_WRAPPER (wrapper), stream); + + return wrapper; +} |