mirror of
https://github.com/matrix-construct/construct
synced 2024-09-30 20:58:51 +02:00
81 lines
2.3 KiB
C++
81 lines
2.3 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_B64_H
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namespace ircd::b64
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{
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extern const u8
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dict_rfc1421[64], // [62] = '+', [63] = '/'
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dict_rfc3501[64], // [62] = '+', [63] = ','
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dict_rfc4648[64]; // [62] = '-', [63] = '_'
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// Binary -> Base64 conversion 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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// Binary -> Base64 conversion without padding
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constexpr size_t encode_unpadded_size(const size_t &) noexcept;
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size_t encode_unpadded_size(const const_buffer &in) noexcept;
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string_view encode_unpadded(const mutable_buffer &out, const const_buffer &in) noexcept;
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// Base64 -> Binary conversion (padded or unpadded)
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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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// Base64 convenience conversions
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string_view tob64url(const mutable_buffer &out, const string_view &in) noexcept;
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string_view urltob64(const mutable_buffer &out, const string_view &in) noexcept;
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}
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inline size_t
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ircd::b64::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::b64::decode_size(const size_t &in)
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noexcept
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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::b64::encode_unpadded_size(const const_buffer &in)
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noexcept
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{
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return encode_unpadded_size(size(in));
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}
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constexpr size_t
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ircd::b64::encode_unpadded_size(const size_t &in)
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noexcept
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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::b64::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::b64::encode_size(const size_t &in)
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noexcept
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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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