evolution/camel/camel-simple-data-wrapper.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-simple-data-wrapper.c : simple implementation of a data wrapper */
/* store the data in a glib byte array                                   */

/* 
 *
 * Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@inria.fr> .
 *
 * 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 <config.h>
#include "camel-simple-data-wrapper.h"
#include "camel-log.h"

static  CamelDataWrapperClass *parent_class=NULL;

/* Returns the class for a CamelDataWrapper */
#define CSDW_CLASS(so) CAMEL_SIMPLE_DATA_WRAPPER_CLASS (GTK_OBJECT(so)->klass)

static void _construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
static void _write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
static void _finalize (GtkObject *object);

static void
camel_simple_data_wrapper_class_init (CamelSimpleDataWrapperClass *camel_simple_data_wrapper_class)
{
	CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_simple_data_wrapper_class);
	GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_data_wrapper_class);

	parent_class = gtk_type_class (camel_data_wrapper_get_type ());
	/* virtual method definition */

	/* virtual method overload */
	camel_data_wrapper_class->write_to_stream = _write_to_stream;
	camel_data_wrapper_class->construct_from_stream = _construct_from_stream;

	gtk_object_class->finalize = _finalize;
}






GtkType
camel_simple_data_wrapper_get_type (void)
{
	static GtkType camel_simple_data_wrapper_type = 0;
	
	if (!camel_simple_data_wrapper_type)	{
		GtkTypeInfo camel_simple_data_wrapper_info =	
		{
			"CamelSimpleDataWrapper",
			sizeof (CamelSimpleDataWrapper),
			sizeof (CamelSimpleDataWrapperClass),
			(GtkClassInitFunc) camel_simple_data_wrapper_class_init,
			(GtkObjectInitFunc) NULL,
				/* reserved_1 */ NULL,
				/* reserved_2 */ NULL,
			(GtkClassInitFunc) NULL,
		};
		
		camel_simple_data_wrapper_type = gtk_type_unique (camel_data_wrapper_get_type (), &camel_simple_data_wrapper_info);
	}
	
	return camel_simple_data_wrapper_type;
}


static void           
_finalize (GtkObject *object)
{
	CamelSimpleDataWrapper *simple_data_wrapper = CAMEL_SIMPLE_DATA_WRAPPER (object);

	CAMEL_LOG_FULL_DEBUG ("Entering CamelMimePart::finalize\n");
	if (simple_data_wrapper->byte_array) g_byte_array_free (simple_data_wrapper->byte_array, TRUE);

	GTK_OBJECT_CLASS (parent_class)->finalize (object);
	CAMEL_LOG_FULL_DEBUG ("Leaving CamelMimePart::finalize\n");
}


/**
 * camel_simple_data_wrapper_new: create a new CamelSimpleDataWrapper object
 * 
 * 
 * 
 * Return value: 
 **/
CamelSimpleDataWrapper *
camel_simple_data_wrapper_new ()
{
	CamelSimpleDataWrapper *simple_data_wrapper;
	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Entering new()\n");
	
	simple_data_wrapper = (CamelSimpleDataWrapper *)gtk_type_new (CAMEL_SIMPLE_DATA_WRAPPER_TYPE);
	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Leaving new()\n");
	return simple_data_wrapper;
}



static void
_write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream)
{
	CamelSimpleDataWrapper *simple_data_wrapper = CAMEL_SIMPLE_DATA_WRAPPER (data_wrapper);
	GByteArray *array;
	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Entering _write_to_stream\n");

	g_assert (data_wrapper);
	g_assert (stream);
	g_assert (simple_data_wrapper->byte_array);
	array = simple_data_wrapper->byte_array;
	if (array->len)
		camel_stream_write (stream, (gchar *)array->data, array->len);

		CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Leaving _write_to_stream\n");
}




#define _CMSDW_TMP_BUF_SIZE 100
static void
_construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream)
{
	CamelSimpleDataWrapper *simple_data_wrapper = CAMEL_SIMPLE_DATA_WRAPPER (data_wrapper);
	gint nb_bytes_read;
	static gchar *tmp_buf;
	GByteArray *array;

	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Entering _construct_from_stream\n");

	g_assert (data_wrapper);
	g_assert (stream);
	
	if (!tmp_buf) {
		CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper::construct_from_stream allocating new temp buffer "
				      "with %d bytes\n",  _CMSDW_TMP_BUF_SIZE);
		tmp_buf = g_new (gchar, _CMSDW_TMP_BUF_SIZE);
	}
	
	array = simple_data_wrapper->byte_array;
	if (array) {
		CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper::construct_from_stream freeing old byte array\n");
		g_byte_array_free (array, FALSE);
	}
	
	array = g_byte_array_new ();
	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper::construct_from_stream new byte array address:%p\n", array);
	simple_data_wrapper->byte_array = array;
	nb_bytes_read = camel_stream_read (stream, tmp_buf, _CMSDW_TMP_BUF_SIZE);
	while (nb_bytes_read>0) {
		CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper::construct_from_stream read %d bytes from stream\n", nb_bytes_read);
		if (nb_bytes_read>0) g_byte_array_append (array, tmp_buf, nb_bytes_read);		
		nb_bytes_read = camel_stream_read (stream, tmp_buf, _CMSDW_TMP_BUF_SIZE);
	};

	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Leaving _construct_from_stream\n");	
}




/**
 * camel_simple_data_wrapper_set_text: set some text as data wrapper content 
 * @simple_data_wrapper: SimpleDataWrapper object
 * @text: the text to use
 * 
 * Utility routine used to set up the content of a SimpleDataWrapper object
 * to be a character string. 
 **/
void
camel_simple_data_wrapper_set_text (CamelSimpleDataWrapper *simple_data_wrapper, const gchar *text)
{
	GByteArray *array;
	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Entering set_text\n");

	array = simple_data_wrapper->byte_array;
	if (array) {
		CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper::set_text freeing old byte array\n"); 
		g_byte_array_free (array, FALSE);
	}
	
	array = g_byte_array_new ();
	simple_data_wrapper->byte_array = array;
	
	g_byte_array_append (array, text, strlen (text));

	CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Entering set_text\n");
}