82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
// Copyright (c) 2017, 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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#include "hex.h"
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#include <iterator>
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#include <limits>
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#include <ostream>
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#include <stdexcept>
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namespace epee
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{
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namespace
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{
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template<typename T>
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void write_hex(T&& out, const span<const std::uint8_t> src)
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{
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static constexpr const char hex[] = u8"0123456789abcdef";
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static_assert(sizeof(hex) == 17, "bad string size");
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for (const std::uint8_t byte : src)
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{
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*out = hex[byte >> 4];
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++out;
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*out = hex[byte & 0x0F];
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++out;
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}
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}
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}
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std::string to_hex::string(const span<const std::uint8_t> src)
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{
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if (std::numeric_limits<std::size_t>::max() / 2 < src.size())
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throw std::range_error("hex_view::to_string exceeded maximum size");
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std::string out{};
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out.resize(src.size() * 2);
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buffer_unchecked(std::addressof(out[0]), src);
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return out;
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}
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void to_hex::buffer(std::ostream& out, const span<const std::uint8_t> src)
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{
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write_hex(std::ostreambuf_iterator<char>{out}, src);
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}
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void to_hex::formatted(std::ostream& out, const span<const std::uint8_t> src)
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{
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out.put('<');
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buffer(out, src);
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out.put('>');
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}
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void to_hex::buffer_unchecked(char* out, const span<const std::uint8_t> src) noexcept
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{
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return write_hex(out, src);
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}
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}
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