mirror of
https://github.com/matrix-construct/construct
synced 2024-10-29 18:08:53 +01:00
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_B58_H
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namespace ircd::b58
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{
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// Binary -> Base58 encode suite
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constexpr size_t encode_size(const size_t &) noexcept;
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size_t encode_size(const const_buffer &in) noexcept;
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string_view encode(const mutable_buffer &out, const const_buffer &in) noexcept;
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// Base58 -> Binary decode suite
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constexpr size_t decode_size(const size_t &) noexcept;
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size_t decode_size(const string_view &in) noexcept;
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const_buffer decode(const mutable_buffer &out, const string_view &in);
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// Convenience conversions
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string_view tob64(const mutable_buffer &out, const string_view &in);
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string_view tob64_unpadded(const mutable_buffer &out, const string_view &in);
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string_view fromb64(const mutable_buffer &out, const string_view &in);
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}
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inline size_t
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ircd::b58::decode_size(const string_view &in)
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noexcept
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{
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return decode_size(size(in));
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}
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constexpr size_t
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ircd::b58::decode_size(const size_t &in)
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noexcept
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{
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return in * 733UL / 1000UL + 1UL; // log(58) / log(256), rounded up
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}
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inline size_t
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ircd::b58::encode_size(const const_buffer &in)
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noexcept
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{
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return encode_size(size(in));
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}
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constexpr size_t
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ircd::b58::encode_size(const size_t &in)
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noexcept
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{
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return in * 138UL / 100UL + 1UL; // log(256) / log(58), rounded up
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}
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