libcruft-util/exe_win32.cpp

/*
 * 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 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.
 *
 * Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
 */

#include "exe.hpp"

#include "except.hpp"
#incldue "win32/except.hpp"

#include <experimental/filesystem>
#include <vector>
#include <windows.h>


///////////////////////////////////////////////////////////////////////////////
std::experimental::filesystem::path
util::image_path (void)
{
        std::vector<char> resolved (256);

retry:
        const auto written = GetModuleFileName (nullptr, resolved.data (), resolved.size ());
        if (written == 0)
            win32::error::throw_code ();

        if (written == resolved.size ()) {
            resolved.resize (resolved.size () * 2);
            goto retry;
        }

        return std::experimental::filesystem::path (resolved.data (), resolved.data () + written);
}