1 files changed, 23 insertions, 0 deletions

diff --git a/libbb/auto_string.c b/libbb/auto_string.c
new file mode 100644
index 000000000..ae940069a
--- /dev/null
+++ b/libbb/auto_string.c
@@ -0,0 +1,23 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2015 Denys Vlasenko
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//kbuild:lib-y += auto_string.o
+
+#include "libbb.h"
+
+char* FAST_FUNC auto_string(char *str)
+{
+        static char *saved[4];
+        static uint8_t cur_saved; /* = 0 */
+
+        free(saved[cur_saved]);
+        saved[cur_saved] = str;
+        cur_saved = (cur_saved + 1) & (ARRAY_SIZE(saved)-1);
+
+        return str;
+}