forgot to commit new vector_streambuf source file

source/detail/serialization/vector_streambuf.cpp

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+// Copyright (c) 2016-2017 Thomas Fussell
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, WRISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE
+//
+// @license: http://www.opensource.org/licenses/mit-license.php
+// @author: see AUTHORS file
+
+#include <detail/serialization/vector_streambuf.hpp>
+
+namespace xlnt {
+namespace detail {
+
+vector_istreambuf::vector_istreambuf(const std::vector<std::uint8_t> &data)
+    : data_(data),
+        position_(0)
+{
+}
+
+vector_istreambuf::int_type vector_istreambuf::underflow()
+{
+    if (position_ == data_.size())
+    {
+        return traits_type::eof();
+    }
+
+    return traits_type::to_int_type(static_cast<char>(data_[position_]));
+}
+
+vector_istreambuf::int_type vector_istreambuf::uflow()
+{
+    if (position_ == data_.size())
+    {
+        return traits_type::eof();
+    }
+
+    return traits_type::to_int_type(static_cast<char>(data_[position_++]));
+}
+
+std::streamsize vector_istreambuf::showmanyc()
+{
+    if (position_ == data_.size())
+    {
+        return static_cast<std::streamsize>(-1);
+    }
+
+    return static_cast<std::streamsize>(data_.size() - position_);
+}
+
+std::streampos vector_istreambuf::seekoff(std::streamoff off, std::ios_base::seekdir way, std::ios_base::openmode)
+{
+    if (way == std::ios_base::beg)
+    {
+        position_ = 0;
+    }
+    else if (way == std::ios_base::end)
+    {
+        position_ = data_.size();
+    }
+
+    if (off < 0)
+    {
+        if (static_cast<std::size_t>(-off) > position_)
+        {
+            position_ = 0;
+            return static_cast<std::ptrdiff_t>(-1);
+        }
+        else
+        {
+            position_ -= static_cast<std::size_t>(-off);
+        }
+    }
+    else if (off > 0)
+    {
+        if (static_cast<std::size_t>(off) + position_ > data_.size())
+        {
+            position_ = data_.size();
+            return static_cast<std::ptrdiff_t>(-1);
+        }
+        else
+        {
+            position_ += static_cast<std::size_t>(off);
+        }
+    }
+
+    return static_cast<std::ptrdiff_t>(position_);
+}
+
+std::streampos vector_istreambuf::seekpos(std::streampos sp, std::ios_base::openmode)
+{
+    if (sp < 0)
+    {
+        position_ = 0;
+    }
+    else if (static_cast<std::size_t>(sp) > data_.size())
+    {
+        position_ = data_.size();
+    }
+    else
+    {
+        position_ = static_cast<std::size_t>(sp);
+    }
+        
+    return static_cast<std::ptrdiff_t>(position_);
+}
+
+vector_ostreambuf::vector_ostreambuf(std::vector<std::uint8_t> &data)
+    : data_(data),
+        position_(0)
+{
+}
+
+vector_ostreambuf::int_type vector_ostreambuf::overflow(int_type c)
+{
+    if (c != traits_type::eof())
+    {
+        data_.push_back(static_cast<std::uint8_t>(c));
+        position_ = data_.size() - 1;
+    }
+
+    return traits_type::to_int_type(static_cast<char>(data_[position_]));
+}
+
+std::streamsize vector_ostreambuf::xsputn(const char *s, std::streamsize n)
+{
+    if (data_.empty())
+    {
+        data_.resize(static_cast<std::size_t>(n));
+    }
+    else
+    {
+        auto position_size = data_.size();
+        auto required_size = static_cast<std::size_t>(position_ + static_cast<std::size_t>(n));
+        data_.resize(std::max(position_size, required_size));
+    }
+
+    std::copy(s, s + n, data_.begin() + static_cast<std::ptrdiff_t>(position_));
+    position_ += static_cast<std::size_t>(n);
+
+    return n;
+}
+
+std::streampos vector_ostreambuf::seekoff(std::streamoff off, std::ios_base::seekdir way, std::ios_base::openmode)
+{
+    if (way == std::ios_base::beg)
+    {
+        position_ = 0;
+    }
+    else if (way == std::ios_base::end)
+    {
+        position_ = data_.size();
+    }
+
+    if (off < 0)
+    {
+        if (static_cast<std::size_t>(-off) > position_)
+        {
+            position_ = 0;
+            return static_cast<std::ptrdiff_t>(-1);
+        }
+        else
+        {
+            position_ -= static_cast<std::size_t>(-off);
+        }
+    }
+    else if (off > 0)
+    {
+        if (static_cast<std::size_t>(off) + position_ > data_.size())
+        {
+            position_ = data_.size();
+            return static_cast<std::ptrdiff_t>(-1);
+        }
+        else
+        {
+            position_ += static_cast<std::size_t>(off);
+        }
+    }
+
+    return static_cast<std::ptrdiff_t>(position_);
+}
+
+std::streampos vector_ostreambuf::seekpos(std::streampos sp, std::ios_base::openmode)
+{
+    if (sp < 0)
+    {
+        position_ = 0;
+    }
+    else if (static_cast<std::size_t>(sp) > data_.size())
+    {
+        position_ = data_.size();
+    }
+    else
+    {
+        position_ = static_cast<std::size_t>(sp);
+    }
+        
+    return static_cast<std::ptrdiff_t>(position_);
+}
+
+XLNT_API std::vector<std::uint8_t> to_vector(std::istream &in_stream)
+{
+    return std::vector<std::uint8_t>(
+        std::istreambuf_iterator<char>(in_stream),
+        std::istreambuf_iterator<char>());
+}
+
+XLNT_API void to_stream(const std::vector<std::uint8_t> &bytes, std::ostream &out_stream)
+{
+    out_stream.write(reinterpret_cast<const char *>(bytes.data()), bytes.size());
+}
+
+XLNT_API std::ostream &operator<<(std::ostream &out_stream, const std::vector<std::uint8_t> &bytes)
+{
+    to_stream(bytes, out_stream);
+    return out_stream;
+}
+
+} // namespace detail
+} // namespace xlnt