1 files changed, 38 insertions, 0 deletions

diff --git a/include/linux/ascii85.h b/include/linux/ascii85.h
new file mode 100644
index 000000000000..4cc40201273e
--- /dev/null
+++ b/include/linux/ascii85.h
@@ -0,0 +1,38 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (c) 2008 Intel Corporation
+ * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _ASCII85_H_
+#define _ASCII85_H_
+
+#include <linux/kernel.h>
+
+#define ASCII85_BUFSZ 6
+
+static inline long
+ascii85_encode_len(long len)
+{
+        return DIV_ROUND_UP(len, 4);
+}
+
+static inline const char *
+ascii85_encode(u32 in, char *out)
+{
+        int i;
+
+        if (in == 0)
+                return "z";
+
+        out[5] = '\0';
+        for (i = 5; i--; ) {
+                out[i] = '!' + in % 85;
+                in /= 85;
+        }
+
+        return out;
+}
+
+#endif