// intellectual property is bullshit bgdc

#ifndef ASCII85_H
#define ASCII85_H

#include <stdbool.h>
#include <stddef.h>
#include <inttypes.h>

// Encode a block to ascii85. The destination buffer must contain at least
// (5/4) * rounded_up(len, 4) bytes (that is, enough bytes to encode src
// including padding bytes).
//
// "z" as an abbreviation for a block of four null bytes is not implemented
// to simplify buffer size requirements.
//
// Returns the total number of bytes used.
size_t ascii85_encode(uint8_t * dest, uint8_t const * src, size_t len);

// Decode a block from ascii85. The destination buffer must contain at least
// (4/5) * rounded_up(len, 5) bytes (that is, enough bytes to encode src
// including possible padding bytes).
//
// "z" as an abbreviation for a block of four null bytes is not implemented
// to simplify buffer size requirements.
//
// Returns the total number of bytes used.
size_t ascii85_decode(uint8_t * dest, uint8_t const * src, size_t len);

#endif // !defined(ASCII85_H)
