/*
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2026 The FreeBSD Foundation
 */

#ifndef _LINUXKPI_LINUX_ASCII85_H_
#define _LINUXKPI_LINUX_ASCII85_H_

#include <sys/param.h>

#define ASCII85_BUFSZ 6

static inline long
ascii85_encode_len(long in_len)
{
        long out_len;

        out_len = howmany(in_len, 4);

        return (out_len);
}

static inline const char *
ascii85_encode(uint32_t in, char *out)
{
        int i;

        if (in == 0) {
                out[0] = 'z';
                out[1] = '\0';
                return (out);
        }

        for (i = ASCII85_BUFSZ - 2; i >= 0; i--) {
                out[i] = in % 85;
                out[i] += 33;

                in /= 85;
        }
        out[ASCII85_BUFSZ - 1] = '\0';

        return (out);
}

#endif /* _LINUXKPI_LINUX_ASCII85_H_ */