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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-stream.c : abstract class for a stream */
/*
*
* Author :
* Bertrand Guiheneuf <Bertrand.Guiheneuf@aful.org>
*
* 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
*/
#include <config.h>
#include "camel-stream.h"
static GtkObjectClass *parent_class = NULL;
/* Returns the class for a CamelMimeMessage */
#define CS_CLASS(so) CAMEL_STREAM_CLASS (GTK_OBJECT(so)->klass)
static void
default_camel_flush (CamelStream *stream)
{
/* nothing */
}
static void
default_camel_close (CamelStream *stream)
{
/* nothing */
}
static gint
default_camel_seek (CamelStream *stream, gint offset, CamelStreamSeekPolicy policy)
{
/* nothing */
return -1;
}
static void
camel_stream_class_init (CamelStreamClass *camel_stream_class)
{
parent_class = gtk_type_class (gtk_object_get_type ());
/* virtual method definition */
camel_stream_class->read = NULL;
camel_stream_class->write = NULL;
camel_stream_class->flush = default_camel_flush;
camel_stream_class->available = NULL;
camel_stream_class->eos = NULL;
camel_stream_class->close = default_camel_close;
camel_stream_class->seek = default_camel_seek;
/* virtual method overload */
}
GtkType
camel_stream_get_type (void)
{
static GtkType camel_stream_type = 0;
if (!camel_stream_type) {
GtkTypeInfo camel_stream_info =
{
"CamelStream",
sizeof (CamelStream),
sizeof (CamelStreamClass),
(GtkClassInitFunc) camel_stream_class_init,
(GtkObjectInitFunc) NULL,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
camel_stream_type = gtk_type_unique (gtk_object_get_type (), &camel_stream_info);
}
return camel_stream_type;
}
/**
* camel_stream_read:
* @stream: a CamelStream.
* @buffer: buffer where bytes pulled from the stream are stored.
* @n: max number of bytes to read.
*
* Read at most @n bytes from the @stream object and stores them
* in the buffer pointed at by @buffer.
*
* Return value: number of bytes actually read.
**/
gint
camel_stream_read (CamelStream *stream, gchar *buffer, gint n)
{
return CS_CLASS (stream)->read (stream, buffer, n);
}
/**
* camel_stream_write:
* @stream: a CamelStream object.
* @buffer: buffer to write.
* @n: number of bytes to write
*
* Write @n bytes from the buffer pointed at by @buffer into @stream.
*
* Return value: the number of bytes actually written
* in the stream.
**/
gint
camel_stream_write (CamelStream *stream, const gchar *buffer, gint n)
{
return CS_CLASS (stream)->write (stream, buffer, n);
}
/**
* camel_stream_flush:
* @stream: a CamelStream object
*
* Flushes the contents of the stream to its backing store.
**/
void
camel_stream_flush (CamelStream *stream)
{
CS_CLASS (stream)->flush (stream);
}
/**
* camel_stream_available:
* @stream: a CamelStream object
*
* Return value: the number of bytes available.
**/
gint
camel_stream_available (CamelStream *stream)
{
return CS_CLASS (stream)->available (stream);
}
/**
* camel_stream_eos:
* @stream: a CamelStream object
*
* Test if there are bytes left to read on the @stream object.
*
* Return value: %TRUE if all the contents on the stream has been read, or
* %FALSE if information is still available.
**/
gboolean
camel_stream_eos (CamelStream *stream)
{
return CS_CLASS (stream)->eos (stream);
}
/**
* camel_stram_close:
* @stream: a CamelStream object.
*
* Close the @stream object.
**/
void
camel_stream_close (CamelStream *stream)
{
CS_CLASS (stream)->close (stream);
}
/**
* camel_stream_seek:
* @stream: a CamelStream object.
* @offset: offset value
* @policy: what to do with the offset
*
*
*
* Return value: new position, -1 if operation failed.
**/
gint
camel_stream_seek (CamelStream *stream, gint offset, CamelStreamSeekPolicy policy)
{
return CS_CLASS (stream)->seek (stream, offset, policy);
}
/***************** Utility functions ********************/
/**
* came_stream_write_strings:
* @stream: a CamelStream object.
* @...: A %NULL terminated list of strings.
*
* This is a utility function that writes the list of
* strings into the @stream object.
*/
void
camel_stream_write_strings (CamelStream *stream, ... )
{
va_list args;
const char *string;
va_start(args, stream);
string = va_arg (args, const char *);
while (string) {
camel_stream_write_string (stream, string);
string = va_arg (args, char *);
}
va_end (args);
}
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