libc/misc/gnu/obprintf.c: implement obstack_printf and obstack_vprintf

This adds a straight forward implementation for obstack_printf and
obstack_vprintf on uClibc's already existing obstack_grow and
vasprintf.  It does not attempt to port over glibc's implementation
in terms of _IO_* structs and functions.

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/libc/misc/gnu/obprintf.c b/libc/misc/gnu/obprintf.c
new file mode 100644
index 000000000..70c058fe5
--- /dev/null
+++ b/libc/misc/gnu/obprintf.c
@@ -0,0 +1,35 @@
+/* Copyright (C) 2013 Gentoo Foundation
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+
+#ifdef _LIBC
+# include <obstack.h>
+#else
+# include "obstack.h"
+#endif
+
+int
+_obstack_vprintf (struct obstack *obstack, const char *format, va_list args)
+{
+  int n;
+  char *s;
+  n = vasprintf(&s, format, args);
+  obstack_grow(obstack, s, n);
+  return n;
+}
+weak_alias (_obstack_vprintf, obstack_vprintf)
+
+int
+_obstack_printf (struct obstack *obstack, const char *format, ...)
+{
+  int n;
+  va_list ap;
+  va_start (ap, format);
+  n = _obstack_vprintf (obstack, format, ap);
+  va_end (ap);
+  return n;
+}
+weak_alias (_obstack_printf, obstack_printf)