parent class is now CamelSeekableStream idem idem idem idem (_seek):

2000-01-24  bertrand  <bertrand@helixcode.com>

	* camel/camel-seekable-stream.c:
	* camel/camel-seekable-stream.h:

	* camel/camel-simple-data-wrapper-stream.h:  parent class is now
	CamelSeekableStream
	* camel/camel-stream-buffered-fs.h: idem
	* camel/camel-stream-buffered-fs.c: idem
	* camel/camel-stream-mem.h: idem
	* camel/camel-stream-mem.c: idem
	(_seek): change declaration
	* camel/camel-stream-fs.c: parent class is now
	CamelSeekableStream
	(_seek): change declaration

	* camel/camel-stream-fs.h: parent class is now
	CamelSeekableStream

Major compatible change in the stream hierarchy.
Removed the seek method from the general streams
so that we can use them as "DataSources".

svn path=/trunk/; revision=1622

1 files changed, 112 insertions, 0 deletions

diff --git a/camel/camel-seekable-stream.c b/camel/camel-seekable-stream.c
new file mode 100644
index 0000000000..00cca3e369
--- /dev/null
+++ b/camel/camel-seekable-stream.c
@@ -0,0 +1,112 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/* 
+ *
+ * Author : 
+ *  Bertrand Guiheneuf <bertrand@helixcode.com>
+ *
+ * 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 <config.h>
+#include "camel-seekable-stream.h"
+#include "camel-log.h"
+
+static CamelStreamClass *parent_class=NULL;
+
+
+/* Returns the class for a CamelSeekableStream */
+#define CSS_CLASS(so) CAMEL_SEEKABLE_STREAM_CLASS (GTK_OBJECT(so)->klass)
+
+static gint _seek (CamelSeekableStream *stream, gint offset, CamelStreamSeekPolicy policy);
+
+
+static void
+camel_seekable_stream_class_init (CamelSeekableStreamClass *camel_seekable_stream_class)
+{
+	CamelStreamClass *camel_stream_class = CAMEL_STREAM_CLASS (camel_seekable_stream_class);
+	GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_seekable_stream_class);
+
+	parent_class = gtk_type_class (camel_stream_get_type ());
+	
+	camel_seekable_stream_class->seek = _seek;
+
+}
+
+GtkType
+camel_seekable_stream_get_type (void)
+{
+	static GtkType camel_seekable_stream_type = 0;
+	
+	if (!camel_seekable_stream_type)	{
+		GtkTypeInfo camel_seekable_stream_info =	
+		{
+			"CamelSeekableStream",
+			sizeof (CamelSeekableStream),
+			sizeof (CamelSeekableStreamClass),
+			(GtkClassInitFunc) camel_seekable_stream_class_init,
+			(GtkObjectInitFunc) NULL,
+				/* reserved_1 */ NULL,
+				/* reserved_2 */ NULL,
+			(GtkClassInitFunc) NULL,
+		};
+		
+		camel_seekable_stream_type = gtk_type_unique (camel_stream_get_type (), &camel_seekable_stream_info);
+	}
+	
+	return camel_seekable_stream_type;
+}
+
+
+
+
+static gint
+_seek (CamelSeekableStream *stream, gint offset, CamelStreamSeekPolicy policy)
+{
+	return -1;
+}
+
+
+
+
+
+
+
+/**
+ * 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 (CamelSeekableStream *stream, gint offset, CamelStreamSeekPolicy policy)
+{
+	return CSS_CLASS (stream)->seek (stream, offset, policy);
+}
+
+
+
+
+
+