X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/5aff007d8fcfb4c6cc3c3627ae15f45562db7a0d..fde67de26e36cf02d5632d934623bbc054a3c1d9:/lib/sink.c

diff --git a/lib/sink.c b/lib/sink.c
index a3e9257..9450fea 100644
--- a/lib/sink.c
+++ b/lib/sink.c
@@ -2,31 +2,26 @@
  * This file is part of DisOrder
  * Copyright (C) 2004, 2007, 2008 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * 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
+ * the Free Software Foundation, either version 3 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.
- *
+ * 
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 /** @file lib/sink.c
  * @brief Abstract output sink type
  */
 
-#include <config.h>
-#include "types.h"
+#include "common.h"
 
-#include <stdio.h>
 #include <stdarg.h>
-#include <string.h>
 #include <errno.h>
 
 #include "mem.h"
@@ -131,6 +126,38 @@ struct sink *sink_dynstr(struct dynstr *output) {
   return (struct sink *)s;
 }
 
+/* discard sink **************************************************************/
+
+static int sink_discard_write(struct sink attribute((unused)) *s,
+			      const void attribute((unused)) *buffer,
+			      int nbytes) {
+  return nbytes;
+}
+
+/** @brief Return a sink which discards all output */
+struct sink *sink_discard(void) {
+  struct sink *s = xmalloc(sizeof *s);
+
+  s->write = sink_discard_write;
+  return s;
+}
+
+/* error sink **************************************************************/
+
+static int sink_error_write(struct sink attribute((unused)) *s,
+			    const void attribute((unused)) *buffer,
+			    int attribute((unused)) nbytes) {
+  return -1;
+}
+
+/** @brief Return a sink which discards all output */
+struct sink *sink_error(void) {
+  struct sink *s = xmalloc(sizeof *s);
+
+  s->write = sink_error_write;
+  return s;
+}
+
 /*
 Local Variables:
 c-basic-offset:2