mirror of
https://github.com/matrix-construct/construct
synced 2024-11-09 11:31:11 +01:00
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
// The Construct
|
|
//
|
|
// Copyright (C) The Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_B58_H
|
|
|
|
namespace ircd::b58
|
|
{
|
|
// Binary -> Base58 encode suite
|
|
constexpr size_t encode_size(const size_t &) noexcept;
|
|
size_t encode_size(const const_buffer &in) noexcept;
|
|
string_view encode(const mutable_buffer &out, const const_buffer &in) noexcept;
|
|
|
|
// Base58 -> Binary decode suite
|
|
constexpr size_t decode_size(const size_t &) noexcept;
|
|
size_t decode_size(const string_view &in) noexcept;
|
|
const_buffer decode(const mutable_buffer &out, const string_view &in);
|
|
|
|
// Convenience conversions
|
|
string_view tob64(const mutable_buffer &out, const string_view &in);
|
|
string_view tob64_unpadded(const mutable_buffer &out, const string_view &in);
|
|
string_view fromb64(const mutable_buffer &out, const string_view &in);
|
|
}
|
|
|
|
inline size_t
|
|
ircd::b58::decode_size(const string_view &in)
|
|
noexcept
|
|
{
|
|
return decode_size(size(in));
|
|
}
|
|
|
|
constexpr size_t
|
|
ircd::b58::decode_size(const size_t &in)
|
|
noexcept
|
|
{
|
|
return in * 733UL / 1000UL + 1UL; // log(58) / log(256), rounded up
|
|
}
|
|
|
|
inline size_t
|
|
ircd::b58::encode_size(const const_buffer &in)
|
|
noexcept
|
|
{
|
|
return encode_size(size(in));
|
|
}
|
|
|
|
constexpr size_t
|
|
ircd::b58::encode_size(const size_t &in)
|
|
noexcept
|
|
{
|
|
return in * 138UL / 100UL + 1UL; // log(256) / log(58), rounded up
|
|
}
|