1 files changed, 45 insertions, 0 deletions
diff --git a/lib/xprintf.h b/lib/xprintf.h
new file mode 100644
index 0000000..18ca05c
--- /dev/null
+++ b/lib/xprintf.h
@@ -0,0 +1,45 @@
+/* printf wrappers that fail immediately for non-file-related errors
+   Copyright (C) 2007-2020 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 3 of the License, 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 <https://www.gnu.org/licenses/>.  */
+
+#ifndef _XPRINTF_H
+#define _XPRINTF_H
+
+#include <stdarg.h>
+#include <stdio.h>
+
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The __-protected variants of the attributes 'format' and 'printf' are
+   accepted by gcc versions 2.6.4 (effectively 2.7) and later.
+   We enable _GL_ATTRIBUTE_FORMAT only if these are supported too, because
+   gnulib and libintl do '#define printf __printf__' when they override
+   the 'printf' function.  */
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define _GL_ATTRIBUTE_FORMAT(spec) /* empty */
+#endif
+
+extern int xprintf (char const *restrict format, ...)
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 1, 2));
+extern int xvprintf (char const *restrict format, va_list args)
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 1, 0));
+extern int xfprintf (FILE *restrict stream, char const *restrict format, ...)
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 2, 3));
+extern int xvfprintf (FILE *restrict stream, char const *restrict format,
+                      va_list args)
+  _GL_ATTRIBUTE_FORMAT ((__printf__, 2, 0));
+
+#endif