42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
// Copyright (c) 2017 Computer Vision Center (CVC) at the Universitat Autonoma
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// de Barcelona (UAB).
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//
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// This work is licensed under the terms of the MIT license.
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// For a copy, see <https://opensource.org/licenses/MIT>.
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#include "Buffer.h"
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#include <boost/random/independent_bits.hpp>
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#include <climits>
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#include <random>
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namespace util {
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namespace buffer {
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shared_buffer make_random(size_t size) {
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if (size == 0u)
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return make_empty();
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using random_bytes_engine = boost::random::independent_bits_engine<
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std::random_device,
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CHAR_BIT,
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unsigned char>;
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random_bytes_engine rbe;
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auto buffer = make_empty(size);
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std::generate(buffer->begin(), buffer->end(), std::ref(rbe));
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return buffer;
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}
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std::string to_hex_string(const Buffer &buf, size_t length) {
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length = std::min(static_cast<size_t>(buf.size()), length);
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auto buffer = std::make_unique<char[]>(2u * length + 1u);
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for (auto i = 0u; i < length; ++i)
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sprintf(&buffer[2u * i], "%02x", buf.data()[i]);
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if (length < buf.size())
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return std::string(buffer.get()) + std::string("...");
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return std::string(buffer.get());
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}
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} // namespace buffer
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} // namespace util
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