/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* camelDataWrapper.c : Abstract class for a data_wrapper */ /** THIS IS MOSTLY AN ABSTRACT CLASS THAT SHOULD HAVE BEEN AN INTERFACE. **/ /* * * Author : * Bertrand Guiheneuf * * 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 */ #include #include "camel-data-wrapper.h" #include "camel-log.h" static GtkObjectClass *parent_class=NULL; /* Returns the class for a CamelDataWrapper */ #define CDW_CLASS(so) CAMEL_DATA_WRAPPER_CLASS (GTK_OBJECT(so)->klass) static void my_set_input_stream (CamelDataWrapper *data_wrapper, CamelStream *stream); static CamelStream *my_get_input_stream (CamelDataWrapper *data_wrapper); static void my_set_output_stream (CamelDataWrapper *data_wrapper, CamelStream *stream); static CamelStream *my_get_output_stream (CamelDataWrapper *data_wrapper); static void my_construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream); static void my_write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream); static void my_set_mime_type (CamelDataWrapper *data_wrapper, const gchar *mime_type); static gchar *my_get_mime_type (CamelDataWrapper *data_wrapper); static GMimeContentField *my_get_mime_type_field (CamelDataWrapper *data_wrapper); static void my_set_mime_type_field (CamelDataWrapper *data_wrapper, GMimeContentField *mime_type); static CamelStream *my_get_stream (CamelDataWrapper *data_wrapper); static void my_finalize (GtkObject *object); static void camel_data_wrapper_class_init (CamelDataWrapperClass *camel_data_wrapper_class) { GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_data_wrapper_class); parent_class = gtk_type_class (gtk_object_get_type ()); /* virtual method definition */ camel_data_wrapper_class->write_to_stream = my_write_to_stream; camel_data_wrapper_class->construct_from_stream = my_construct_from_stream; camel_data_wrapper_class->set_mime_type = my_set_mime_type; camel_data_wrapper_class->get_mime_type = my_get_mime_type; camel_data_wrapper_class->get_mime_type_field = my_get_mime_type_field; camel_data_wrapper_class->set_mime_type_field = my_set_mime_type_field; camel_data_wrapper_class->get_stream = my_get_stream; camel_data_wrapper_class->set_input_stream = my_set_input_stream; camel_data_wrapper_class->get_input_stream = my_get_input_stream; camel_data_wrapper_class->set_output_stream = my_set_output_stream; camel_data_wrapper_class->get_output_stream = my_get_output_stream; /* virtual method overload */ gtk_object_class->finalize = my_finalize; } static void camel_data_wrapper_init (gpointer object, gpointer klass) { CamelDataWrapper *camel_data_wrapper = CAMEL_DATA_WRAPPER (object); CAMEL_LOG_FULL_DEBUG ( "camel_data_wrapper_init:: Entering\n"); camel_data_wrapper->mime_type = gmime_content_field_new (NULL, NULL); CAMEL_LOG_FULL_DEBUG ( "camel_data_wrapper_init:: Leaving\n"); } GtkType camel_data_wrapper_get_type (void) { static GtkType camel_data_wrapper_type = 0; if (!camel_data_wrapper_type) { GtkTypeInfo camel_data_wrapper_info = { "CamelDataWrapper", sizeof (CamelDataWrapper), sizeof (CamelDataWrapperClass), (GtkClassInitFunc) camel_data_wrapper_class_init, (GtkObjectInitFunc) camel_data_wrapper_init, /* reserved_1 */ NULL, /* reserved_2 */ NULL, (GtkClassInitFunc) NULL, }; camel_data_wrapper_type = gtk_type_unique (gtk_object_get_type (), &camel_data_wrapper_info); } return camel_data_wrapper_type; } static void my_finalize (GtkObject *object) { CamelDataWrapper *camel_data_wrapper = CAMEL_DATA_WRAPPER (object); CAMEL_LOG_FULL_DEBUG ("Entering CamelDataWrapper::finalize\n"); CAMEL_LOG_FULL_DEBUG ("CamelDataWrapper::finalize, finalizing object %p\n", object); if (camel_data_wrapper->mime_type) gmime_content_field_unref (camel_data_wrapper->mime_type); if (camel_data_wrapper->input_stream) gtk_object_unref (GTK_OBJECT (camel_data_wrapper->input_stream)); if (camel_data_wrapper->output_stream) gtk_object_unref (GTK_OBJECT (camel_data_wrapper->output_stream)); parent_class->finalize (object); CAMEL_LOG_FULL_DEBUG ("Leaving CamelDataWrapper::finalize\n"); } static void my_set_input_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { g_assert (data_wrapper); if (data_wrapper->input_stream) gtk_object_unref (GTK_OBJECT (data_wrapper->input_stream)); data_wrapper->input_stream = stream; if (!data_wrapper->output_stream && stream) my_set_output_stream (data_wrapper, stream); if (stream) gtk_object_ref (GTK_OBJECT (stream)); } void camel_data_wrapper_set_input_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { g_assert (data_wrapper); CDW_CLASS(data_wrapper)->set_input_stream (data_wrapper, stream); } static CamelStream * my_get_input_stream (CamelDataWrapper *data_wrapper) { g_assert (data_wrapper); return (data_wrapper->input_stream); } CamelStream * camel_data_wrapper_get_input_stream (CamelDataWrapper *data_wrapper) { g_assert (data_wrapper); return CDW_CLASS(data_wrapper)->get_input_stream (data_wrapper); } static void my_set_output_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { g_assert (data_wrapper); if (data_wrapper->output_stream) gtk_object_unref (GTK_OBJECT (data_wrapper->output_stream)); data_wrapper->output_stream = stream; if (stream) gtk_object_ref (GTK_OBJECT (stream)); } void camel_data_wrapper_set_output_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { g_assert (data_wrapper); CDW_CLASS(data_wrapper)->set_output_stream (data_wrapper, stream); } static CamelStream * my_get_output_stream (CamelDataWrapper *data_wrapper) { g_assert (data_wrapper); return (data_wrapper->output_stream); } CamelStream * camel_data_wrapper_get_output_stream (CamelDataWrapper *data_wrapper) { g_assert (data_wrapper); return CDW_CLASS(data_wrapper)->get_output_stream (data_wrapper); } /** * my_write_to_stream: write data content in a byte stream * @data_wrapper: the data wrapper object * @stream byte stream where data will be written * * This method must be overriden by subclasses * Data must be written in the bytes stream * in a architecture independant fashion. * If data is a standard data (for example an jpg image) * it must be serialized in the strea exactly as it * would be saved on disk. A simple dump of the stream in * a file should be sufficient for the data to be * re-read by a foreign application. * **/ static void my_write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { gchar tmp_buf[4096]; gint nb_read; gint nb_written; CamelStream *output_stream; /* * default implementation that uses the input * stream and stream it in a blocking way. */ g_assert (data_wrapper); g_assert (stream); output_stream = camel_data_wrapper_get_output_stream (data_wrapper); if (!output_stream) return; camel_stream_reset (output_stream); while (!camel_stream_eos (output_stream)) { nb_read = camel_stream_read (output_stream, tmp_buf, 4096); nb_written = 0; while (nb_written < nb_read) nb_written += camel_stream_write (stream, tmp_buf + nb_written, nb_read - nb_written); } CAMEL_LOG_FULL_DEBUG ("CamelDataWrapper::write_to_stream, nmumber of bytes written : %d\n", nb_written); } /** * camel_data_wrapper_write_to_stream: write data in a stream * @data_wrapper: the data wrapper object * @stream: byte stream where data will be written * * Write data content in a stream. Data is stored in a machine * independant format. * **/ void camel_data_wrapper_write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { CAMEL_LOG_FULL_DEBUG ( "camel_data_wrapper_write_to_stream:: Entering\n"); CDW_CLASS(data_wrapper)->write_to_stream (data_wrapper, stream); CAMEL_LOG_FULL_DEBUG ( "camel_data_wrapper_write_to_stream:: Leaving\n"); } static void my_construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { /* nothing */ } void camel_data_wrapper_construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream) { CAMEL_LOG_FULL_DEBUG ( "camel_data_wrapper_construct_from_stream:: Entering\n"); CDW_CLASS(data_wrapper)->construct_from_stream (data_wrapper, stream); CAMEL_LOG_FULL_DEBUG ( "camel_data_wrapper_construct_from_stream:: Leaving\n"); } static void my_set_mime_type (CamelDataWrapper *data_wrapper, const gchar *mime_type) { CAMEL_LOG_FULL_DEBUG ( "CamelDataWrapper::set_mime_type Entering\n"); g_assert (mime_type); gmime_content_field_construct_from_string (data_wrapper->mime_type, mime_type); CAMEL_LOG_FULL_DEBUG ( "CamelDataWrapper::set_mime_type Leaving\n"); } void camel_data_wrapper_set_mime_type (CamelDataWrapper *data_wrapper, const gchar *mime_type) { CDW_CLASS(data_wrapper)->set_mime_type (data_wrapper, mime_type); } static gchar * my_get_mime_type (CamelDataWrapper *data_wrapper) { gchar *mime_type; mime_type = gmime_content_field_get_mime_type (data_wrapper->mime_type); return mime_type; } gchar * camel_data_wrapper_get_mime_type (CamelDataWrapper *data_wrapper) { CAMEL_LOG_FULL_DEBUG ( "camel_data_wrapper_get_mime_type:: Entering before returning\n"); return CDW_CLASS(data_wrapper)->get_mime_type (data_wrapper); } static GMimeContentField * my_get_mime_type_field (CamelDataWrapper *data_wrapper) { return data_wrapper->mime_type; } GMimeContentField * camel_data_wrapper_get_mime_type_field (CamelDataWrapper *data_wrapper) { return CDW_CLASS(data_wrapper)->get_mime_type_field (data_wrapper); } static void my_set_mime_type_field (CamelDataWrapper *data_wrapper, GMimeContentField *mime_type) { if (data_wrapper->mime_type) gmime_content_field_free (data_wrapper->mime_type); data_wrapper->mime_type = mime_type; } void camel_data_wrapper_set_mime_type_field (CamelDataWrapper *data_wrapper, GMimeContentField *mime_type) { CDW_CLASS(data_wrapper)->set_mime_type_field (data_wrapper, mime_type); } static CamelStream * my_get_stream (CamelDataWrapper *data_wrapper) { /* This needs to be implemented in subclasses. */ return NULL; } CamelStream * camel_data_wrapper_get_stream (CamelDataWrapper *data_wrapper) { return CDW_CLASS(data_wrapper)->get_stream (data_wrapper); }