New snprintf module from Simon Josefsson.

1 files changed, 55 insertions, 0 deletions

diff --git a/lib/snprintf.c b/lib/snprintf.c
new file mode 100644
index 0000000000..6cc44aa91a
--- /dev/null
+++ b/lib/snprintf.c
@@ -0,0 +1,55 @@
+/* Formatted output to strings.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   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, 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.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Get specification.  */
+#include "snprintf.h"
+
+/* Get vasnprintf.  */
+#include "vasnprintf.h"
+
+/* Get MIN. */
+#include <minmax.h>
+
+/* Print formatted output to string STR.  Similar to sprintf, but
+   additional length SIZE limit how much is written into STR.  Returns
+   string length of formatted string (which may be larger than SIZE).
+   STR may be NULL, in which case nothing will be written.  On error,
+   return a negative value. */
+int
+snprintf (char *str, size_t size, const char *format, ...)
+{
+  size_t len;
+  char *out = vasnprintf (NULL, &len, format, args);
+
+  if (!out)
+    return -1;
+
+  if (str)
+    {
+      memcpy (str, out, MIN (len + 1, size));
+      str[size - 1] = '\0';
+    }
+
+  free (out);
+
+  return len;
+}