New module 'freadable'.

1 files changed, 43 insertions, 0 deletions

diff --git a/lib/freadable.h b/lib/freadable.h
new file mode 100644
index 0000000000..4adf15a758
--- /dev/null
+++ b/lib/freadable.h
@@ -0,0 +1,43 @@
+/* Retrieve information about a FILE stream.
+   Copyright (C) 2007 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, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#include <stdbool.h>
+#include <stdio.h>
+
+/* Return true if the stream STREAM supports reading, false if it supports
+   only writing, i.e. if it was opened write-only or append-only.
+   STREAM must not be wide-character oriented.
+   The result doesn't change until the stream is closed or re-opened.  */
+
+#if HAVE___FREADABLE /* glibc >= 2.2, Solaris >= 7 */
+
+# include <stdio_ext.h>
+# define freadable(stream) (__freadable (stream) != 0)
+
+#else
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+extern bool freadable (FILE *stream);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif