/*
 * 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/math.h>
#include <linux/types.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