1 files changed, 52 insertions, 0 deletions
diff --git a/REORG.TODO/string/strfry.c b/REORG.TODO/string/strfry.c
new file mode 100644
index 0000000000..9d1bd88d4d
--- /dev/null
+++ b/REORG.TODO/string/strfry.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 1992-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+char *
+strfry (char *string)
+{
+  static int init;
+  static struct random_data rdata;
+
+  if (!init)
+    {
+      static char state[32];
+      rdata.state = NULL;
+      __initstate_r (time ((time_t *) NULL) ^ getpid (),
+		     state, sizeof (state), &rdata);
+      init = 1;
+    }
+
+  size_t len = strlen (string);
+  if (len > 0)
+    for (size_t i = 0; i < len - 1; ++i)
+      {
+	int32_t j;
+	__random_r (&rdata, &j);
+	j = j % (len - i) + i;
+
+	char c = string[i];
+	string[i] = string[j];
+	string[j] = c;
+      }
+
+  return string;
+}