common: Add function print_assuan_status.

* common/asshelp2.c: New.
(print_assuan_status): New function.
* common/Makefile.am (common_sources): Add asshelp2.c.

1 files changed, 49 insertions, 0 deletions

diff --git a/common/asshelp2.c b/common/asshelp2.c
new file mode 100644
index 000000000..762a14df6
--- /dev/null
+++ b/common/asshelp2.c
@@ -0,0 +1,49 @@
+/* asshelp2.c - More helper functions for Assuan
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assuan.h>
+
+#include "util.h"
+#include "asshelp.h"
+
+/* Helper function to print an assuan status line using a printf
+   format string.  */
+gpg_error_t
+print_assuan_status (assuan_context_t ctx,
+                     const char *keyword,
+                     const char *format, ...)
+{
+  va_list arg_ptr;
+  int rc;
+  char *buf;
+
+  va_start (arg_ptr, format);
+  rc = estream_vasprintf (&buf, format, arg_ptr);
+  va_end (arg_ptr);
+  if (rc < 0)
+    return gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
+  rc = assuan_write_status (ctx, keyword, buf);
+  xfree (buf);
+  return rc;
+}