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103 lines
4.0 KiB
C++
103 lines
4.0 KiB
C++
// Copyright (c) 2017-2023, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include <array>
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#include <cstdint>
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#include <iosfwd>
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#include <string>
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#include <boost/utility/string_ref.hpp>
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#include "wipeable_string.h"
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#include "span.h"
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namespace epee
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{
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struct to_hex
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{
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//! \return A std::string containing hex of `src`.
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static std::string string(const span<const std::uint8_t> src);
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//! \return A epee::wipeable_string containing hex of `src`.
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static epee::wipeable_string wipeable_string(const span<const std::uint8_t> src);
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template<typename T> static epee::wipeable_string wipeable_string(const T &pod) { return wipeable_string(span<const uint8_t>((const uint8_t*)&pod, sizeof(pod))); }
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//! \return An array containing hex of `src`.
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template<std::size_t N>
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static std::array<char, N * 2> array(const std::array<std::uint8_t, N>& src) noexcept
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{
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std::array<char, N * 2> out;
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static_assert(N <= 128, "keep the stack size down");
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buffer_unchecked(out.data(), {src.data(), src.size()});
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return out;
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}
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//! \return An array containing hex of `src`.
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template<typename T>
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static std::array<char, sizeof(T) * 2> array(const T& src) noexcept
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{
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std::array<char, sizeof(T) * 2> out;
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static_assert(sizeof(T) <= 128, "keep the stack size down");
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buffer_unchecked(out.data(), as_byte_span(src));
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return out;
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}
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//! Write `src` as hex to `out`. `out` must be exactly 2x in size.
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static bool buffer(span<char> out, const span<const std::uint8_t> src) noexcept;
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//! Append `src` as hex to `out`.
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static void buffer(std::ostream& out, const span<const std::uint8_t> src);
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//! Append `< + src + >` as hex to `out`.
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static void formatted(std::ostream& out, const span<const std::uint8_t> src);
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private:
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template<typename T> T static convert(const span<const std::uint8_t> src);
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//! Write `src` bytes as hex to `out`. `out` must be twice the length
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static void buffer_unchecked(char* out, const span<const std::uint8_t> src) noexcept;
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};
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//! Convert hex in UTF8 encoding to binary
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struct from_hex
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{
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static bool to_string(std::string& out, boost::string_ref src);
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static bool to_buffer(span<std::uint8_t> out, boost::string_ref src) noexcept;
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private:
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static bool to_buffer_unchecked(std::uint8_t* out, boost::string_ref src) noexcept;
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};
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//! Convert hex in current C locale encoding to binary
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struct from_hex_locale
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{
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static std::vector<uint8_t> to_vector(boost::string_ref src);
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};
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}
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