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110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
// Copyright (c) 2016-2018 Thomas Fussell
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, WRISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE
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//
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// @license: http://www.opensource.org/licenses/mit-license.php
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// @author: see AUTHORS file
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#pragma once
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#include <algorithm>
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#include <iostream>
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#include <vector>
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#include <xlnt/xlnt_config.hpp>
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namespace xlnt {
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namespace detail {
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/// <summary>
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/// Allows a std::vector to be read through a std::istream.
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/// </summary>
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class XLNT_API vector_istreambuf : public std::streambuf
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{
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using int_type = std::streambuf::int_type;
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public:
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vector_istreambuf(const std::vector<std::uint8_t> &data);
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vector_istreambuf(const vector_istreambuf &) = delete;
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vector_istreambuf &operator=(const vector_istreambuf &) = delete;
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private:
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int_type underflow();
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int_type uflow();
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std::streamsize showmanyc();
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std::streampos seekoff(std::streamoff off, std::ios_base::seekdir way, std::ios_base::openmode);
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std::streampos seekpos(std::streampos sp, std::ios_base::openmode);
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private:
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const std::vector<std::uint8_t> &data_;
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std::size_t position_;
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};
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/// <summary>
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/// Allows a std::vector to be written through a std::ostream.
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/// </summary>
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class XLNT_API vector_ostreambuf : public std::streambuf
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{
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using int_type = std::streambuf::int_type;
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public:
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vector_ostreambuf(std::vector<std::uint8_t> &data);
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vector_ostreambuf(const vector_ostreambuf &) = delete;
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vector_ostreambuf &operator=(const vector_ostreambuf &) = delete;
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private:
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int_type overflow(int_type c = traits_type::eof());
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std::streamsize xsputn(const char *s, std::streamsize n);
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std::streampos seekoff(std::streamoff off, std::ios_base::seekdir way, std::ios_base::openmode);
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std::streampos seekpos(std::streampos sp, std::ios_base::openmode);
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private:
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std::vector<std::uint8_t> &data_;
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std::size_t position_;
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};
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//TODO: detail headers shouldn't be exporting such functions
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/// <summary>
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/// Helper function to read all data from in_stream and store them in a vector.
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/// </summary>
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XLNT_API std::vector<std::uint8_t> to_vector(std::istream &in_stream);
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/// <summary>
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/// Helper function to write all data from bytes into out_stream.
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/// </summary>
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XLNT_API void to_stream(const std::vector<std::uint8_t> &bytes, std::ostream &out_stream);
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/// <summary>
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/// Shortcut function to stream a vector of bytes into a std::ostream.
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/// </summary>
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XLNT_API std::ostream &operator<<(std::ostream &out_stream, const std::vector<std::uint8_t> &bytes);
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} // namespace detail
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} // namespace xlnt
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