160 lines
3.6 KiB
C++
160 lines
3.6 KiB
C++
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2014 Danny Robson <danny@nerdcruft.net>
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*/
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#include "io_win32.hpp"
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#include "debug.hpp"
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#include "except.hpp"
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#include <windows.h>
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using util::detail::win32::mapped_file;
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//-----------------------------------------------------------------------------
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static DWORD
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access_to_flags (util::access_t a) {
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switch (a) {
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case util::ACCESS_READ:
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return GENERIC_READ;
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case util::ACCESS_WRITE:
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return GENERIC_WRITE;
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default:
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unreachable ();
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}
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}
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//-----------------------------------------------------------------------------
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mapped_file::mapped_file (const boost::filesystem::path &path,
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access_t access):
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m_data (nullptr, UnmapViewOfFile)
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{
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m_file.reset (CreateFile (path.string ().c_str (),
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access_to_flags (access),
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access == ACCESS_READ ? FILE_SHARE_READ : 0,
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nullptr,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
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0));
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if (m_file == INVALID_HANDLE_VALUE)
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win32_error::throw_code ();
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m_mapping.reset (CreateFileMapping (m_file,
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nullptr,
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access == ACCESS_READ ? PAGE_READONLY : PAGE_READWRITE,
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0, 0,
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nullptr));
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if (m_mapping == INVALID_HANDLE_VALUE)
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win32_error::throw_code ();
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auto view = MapViewOfFile (m_mapping,
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access == ACCESS_READ ? FILE_MAP_READ : FILE_MAP_WRITE,
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0, 0,
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0);
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if (view == nullptr)
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win32_error::throw_code ();
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m_data.reset (
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static_cast<unsigned char*> (view)
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);
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m_size = GetFileSize (m_file, nullptr);
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}
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//-----------------------------------------------------------------------------
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const uint8_t*
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mapped_file::data (void) const
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{
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return m_data.get ();
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}
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uint8_t*
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mapped_file::data (void)
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{
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return m_data.get ();
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}
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size_t
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mapped_file::size (void) const
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{
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return m_size;
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}
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uint8_t*
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mapped_file::begin (void)
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{
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return data ();
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}
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uint8_t*
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mapped_file::end (void)
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{
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return data () + size ();
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}
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const uint8_t*
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mapped_file::cbegin (void) const
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{
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return data ();
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}
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const uint8_t*
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mapped_file::cend (void) const
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{
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return data () + size ();
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}
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//-----------------------------------------------------------------------------
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util::handle_ref::handle_ref ():
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handle (INVALID_HANDLE_VALUE)
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{ ; }
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util::handle_ref::~handle_ref ()
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{
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reset (INVALID_HANDLE_VALUE);
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}
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void
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util::handle_ref::reset (HANDLE _handle)
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{
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if (handle != INVALID_HANDLE_VALUE)
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if (!CloseHandle (handle))
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win32_error::throw_code ();
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handle = _handle;
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}
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util::handle_ref::operator HANDLE (void) const
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{
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return handle;
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}
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