path: root/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                                   */

/* 
 *
 * Author : 
 *  Bertrand Guiheneuf <bertrand@helixcode.com>
 *
 * Copyright 1999, 2000 Helix Code, Inc. (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 <config.h>

#include "camel-simple-data-wrapper.h"
#include "camel-simple-data-wrapper-stream.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            my_construct_from_stream     (CamelDataWrapper *data_wrapper, 
                             CamelStream *stream);
static void            my_write_to_stream           (CamelDataWrapper *data_wrapper, 
                             CamelStream *stream);
static void            my_finalize                  (GtkObject *object);
static CamelStream *   my_get_output_stream         (CamelDataWrapper *data_wrapper);



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 = my_write_to_stream;
    camel_data_wrapper_class->construct_from_stream = my_construct_from_stream;
    camel_data_wrapper_class->get_output_stream = my_get_output_stream;

    gtk_object_class->finalize = my_finalize;
}


static void
camel_simple_data_wrapper_init (CamelSimpleDataWrapper *wrapper)
{
    wrapper->byte_array = NULL;
    wrapper->has_byte_array_stream = FALSE;
}


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) camel_simple_data_wrapper_init,
                /* 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           
my_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 (void)
{
    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
my_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 my_write_to_stream\n");

    g_assert (data_wrapper);
    g_assert (stream);
    
    array = simple_data_wrapper->byte_array;
    if ( array && array->len)
        camel_stream_write (stream, (gchar *)array->data, array->len);
    else
        parent_class->write_to_stream (data_wrapper, stream);
    CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Leaving my_write_to_stream\n");
}


#define my_CMSDW_TMP_BUF_SIZE 100
static void
my_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 my_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",  my_CMSDW_TMP_BUF_SIZE);
        tmp_buf = g_new (gchar, my_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, my_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, my_CMSDW_TMP_BUF_SIZE);
    };

    CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper:: Leaving my_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");
}





static CamelStream *
my_get_output_stream (CamelDataWrapper *data_wrapper)
{
    CamelSimpleDataWrapper *simple_data_wrapper;
    CamelStream *output_stream = NULL;


    CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper::get_output_stream leaving\n");

    g_assert (data_wrapper);
    simple_data_wrapper = CAMEL_SIMPLE_DATA_WRAPPER (data_wrapper);
    
    if (simple_data_wrapper->byte_array && !(simple_data_wrapper->has_byte_array_stream)) {
        output_stream = camel_simple_data_wrapper_stream_new (simple_data_wrapper);
        camel_data_wrapper_set_output_stream (data_wrapper, output_stream);
    }

    CAMEL_LOG_FULL_DEBUG ("CamelSimpleDataWrapper::get_output_stream leaving\n");
    
    return parent_class->get_output_stream (data_wrapper);
           
}