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/* Examples of LLFIO use
(C) 2018 Niall Douglas <http://www.nedproductions.biz/> (2 commits)
File Created: Aug 2018
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License in the accompanying file
Licence.txt or at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Distributed under the Boost Software License, Version 1.0.
(See accompanying file Licence.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
*/
#include <llfio.hpp>
#include <vector>
int main()
{
//! [file_entire_file1]
namespace llfio = LLFIO_V2_NAMESPACE;
// Open the file for read
llfio::file_handle fh = llfio::file( //
{}, // path_handle to base directory
"foo" // path_view to path fragment relative to base directory
// default mode is read only
// default creation is open existing
// default caching is all
// default flags is none
).value(); // If failed, throw a filesystem_error exception
// Make a vector sized the current maximum extent of the file
std::vector<llfio::byte> buffer(fh.maximum_extent().value());
// Synchronous scatter read from file
llfio::file_handle::size_type bytesread = llfio::read(
fh, // handle to read from
0, // offset
{{ buffer.data(), buffer.size() }} // Single scatter buffer of the vector
// default deadline is infinite
).value(); // If failed, throw a filesystem_error exception
// In case of racy truncation of file by third party to new length, adjust buffer to
// bytes actually read
buffer.resize(bytesread);
//! [file_entire_file1]
return 0;
}
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