mirror of
https://github.com/matrix-construct/construct
synced 2024-06-01 01:28:54 +02:00
113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 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_BASE_H
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namespace ircd
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{
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// Binary -> Base58 encode suite
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constexpr size_t b58encode_size(const size_t &);
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size_t b58encode_size(const const_buffer &in);
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string_view b58encode(const mutable_buffer &out, const const_buffer &in);
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std::string b58encode(const const_buffer &in);
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// Base58 -> Binary decode suite
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constexpr size_t b58decode_size(const size_t &);
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size_t b58decode_size(const string_view &in);
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const_buffer b58decode(const mutable_buffer &out, const string_view &in);
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std::string b58decode(const string_view &in);
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// Binary -> Base64 conversion suite
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constexpr size_t b64encode_size(const size_t &);
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size_t b64encode_size(const const_buffer &in);
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string_view b64encode(const mutable_buffer &out, const const_buffer &in);
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std::string b64encode(const const_buffer &in);
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// Binary -> Base64 conversion without padding
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constexpr size_t b64encode_unpadded_size(const size_t &);
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size_t b64encode_unpadded_size(const const_buffer &in);
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string_view b64encode_unpadded(const mutable_buffer &out, const const_buffer &in);
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std::string b64encode_unpadded(const const_buffer &in);
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// Base64 -> Binary conversion (padded or unpadded)
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constexpr size_t b64decode_size(const size_t &);
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size_t b64decode_size(const string_view &in);
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const_buffer b64decode(const mutable_buffer &out, const string_view &in);
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std::string b64decode(const string_view &in);
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// Base64 convenience conversions
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string_view b64tob58(const mutable_buffer &out, const string_view &in);
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string_view b58tob64(const mutable_buffer &out, const string_view &in);
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string_view b58tob64_unpadded(const mutable_buffer &out, const string_view &in);
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string_view b64tob64url(const mutable_buffer &out, const string_view &in);
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string_view b64urltob64(const mutable_buffer &out, const string_view &in);
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}
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inline size_t
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ircd::b64decode_size(const string_view &in)
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{
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return b64decode_size(size(in));
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}
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constexpr size_t
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ircd::b64decode_size(const size_t &in)
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{
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return (in * 0.75) + 1; //XXX: constexpr ceil()
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}
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inline size_t
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ircd::b64encode_unpadded_size(const const_buffer &in)
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{
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return b64encode_unpadded_size(size(in));
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}
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constexpr size_t
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ircd::b64encode_unpadded_size(const size_t &in)
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{
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return (in * (4.0 / 3.0)) + 1; //XXX: constexpr ceil()
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}
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inline size_t
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ircd::b64encode_size(const const_buffer &in)
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{
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return b64encode_size(size(in));
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}
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constexpr size_t
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ircd::b64encode_size(const size_t &in)
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{
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return ((in * (4.0 / 3.0)) + 1) + (3 - in % 3) % 3; //XXX: constexpr ceil
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}
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inline size_t
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ircd::b58decode_size(const string_view &in)
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{
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return b58decode_size(size(in));
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}
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constexpr size_t
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ircd::b58decode_size(const size_t &in)
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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::b58encode_size(const const_buffer &in)
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{
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return b58encode_size(size(in));
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}
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constexpr size_t
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ircd::b58encode_size(const size_t &in)
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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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