/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ /* camel-stream-data-wrapper.c * * Copyright 1999, 2000 HelixCode (http://www.helixcode.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 (CAMEL_IS_STREAM_DATA_WRAPPER (wrapper)); g_return_if_fail (stream != NULL); g_return_if_fail (CAMEL_IS_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; }