Oops, forgot to commit. New stream/filter for doing

	cool stuff.

svn path=/trunk/; revision=6480

1 files changed, 90 insertions, 0 deletions

diff --git a/camel/camel-stream-null.c b/camel/camel-stream-null.c
new file mode 100644
index 0000000000..34cc67ec7c
--- /dev/null
+++ b/camel/camel-stream-null.c
@@ -0,0 +1,90 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */
+/* camel-stream.c : abstract class for a stream */
+
+/*
+ * Author:
+ *  Michael Zucchi <notzed@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-stream-null.h"
+
+static CamelObjectClass *parent_class = NULL;
+
+/* Returns the class for a CamelStream */
+#define CS_CLASS(so) CAMEL_STREAM_NULL_CLASS(CAMEL_OBJECT_GET_CLASS(so))
+
+/* dummy implementations, for a NULL stream */
+static ssize_t   stream_read       (CamelStream *stream, char *buffer, size_t n) { return 0; }
+static ssize_t   stream_write      (CamelStream *stream, const char *buffer, size_t n) { return n; }
+static int       stream_close      (CamelStream *stream) { return 0; }
+static int       stream_flush      (CamelStream *stream) { return 0; }
+static gboolean  stream_eos        (CamelStream *stream) { return TRUE; }
+static int       stream_reset      (CamelStream *stream) { return 0; }
+
+static void
+camel_stream_null_class_init (CamelStreamClass *camel_stream_null_class)
+{
+	CamelStreamClass *camel_stream_class = (CamelStreamClass *)camel_stream_null_class;
+
+	parent_class = camel_type_get_global_classfuncs( CAMEL_OBJECT_TYPE );
+
+	/* virtual method definition */
+	camel_stream_class->read = stream_read;
+	camel_stream_class->write = stream_write;
+	camel_stream_class->close = stream_close;
+	camel_stream_class->flush = stream_flush;
+	camel_stream_class->eos = stream_eos;
+	camel_stream_class->reset = stream_reset;
+}
+
+CamelType
+camel_stream_null_get_type (void)
+{
+	static CamelType camel_stream_null_type = CAMEL_INVALID_TYPE;
+
+	if (camel_stream_null_type == CAMEL_INVALID_TYPE) {
+		camel_stream_null_type = camel_type_register( camel_stream_get_type(),
+							      "CamelStreamNull",
+							      sizeof( CamelStreamNull ),
+							      sizeof( CamelStreamNullClass ),
+							      (CamelObjectClassInitFunc) camel_stream_null_class_init,
+							      NULL,
+							      NULL,
+							      NULL );
+	}
+
+	return camel_stream_null_type;
+}
+
+/**
+ * camel_stream_fs_new_with_fd:
+ * @fd: a file descriptor
+ *
+ * Returns a NULL stream.  A null stream is always at eof, and
+ * always returns success for all reads and writes.
+ *
+ * Return value: the stream
+ **/
+CamelStreamNull *
+camel_stream_null_new(void)
+{
+	return (CamelStreamNull *)camel_object_new(camel_stream_null_get_type ());
+}