New 'c-*printf' modules for formatted output in C locale.

[gnulib.git] / lib / c-vasprintf.c

diff --git a/lib/c-vasprintf.c b/lib/c-vasprintf.c
new file mode 100644 (file)
index 0000000..1e6f6e9
--- /dev/null
+++ b/lib/c-vasprintf.c
@@ -0,0 +1,46 @@
+/* Formatted output to strings in C locale.
+   Copyright (C) 1999, 2002, 2006-2012 Free Software Foundation, Inc.
+
+   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, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "c-vasprintf.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include "c-vasnprintf.h"
+
+int
+c_vasprintf (char **resultp, const char *format, va_list args)
+{
+  size_t length;
+  char *result = c_vasnprintf (NULL, &length, format, args);
+  if (result == NULL)
+    return -1;
+
+  if (length > INT_MAX)
+    {
+      free (result);
+      errno = EOVERFLOW;
+      return -1;
+    }
+
+  *resultp = result;
+  /* Return the number of resulting bytes, excluding the trailing NUL.  */
+  return length;
+}