set_args.hpp

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// Copyright (c) 2006, 2007 Julio M. Merino Vidal
// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
// Copyright (c) 2009 Boris Schaeling
// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include <boost/process/posix/initializers/initializer_base.hpp>
#include <boost/range/algorithm/transform.hpp>
#include <boost/shared_array.hpp>
#include <string>
 
namespace boost::process::posix::initializers
{
 
    template <class Range>
    class set_args_ : public initializer_base
    {
    private:
        static char* c_str(const std::string& s)
        {
            return const_cast<char*>(s.c_str());
        }
 
    public:
        explicit set_args_(const Range& args)
        {
            args_.reset(new char* [args.size() + 1]);
            boost::transform(args, args_.get(), c_str);
            args_[args.size()] = 0;
        }
 
        template <class PosixExecutor>
        void on_exec_setup(PosixExecutor& e) const
        {
            e.cmd_line = args_.get();
            if (!e.exe && *args_[0])
            {
                e.exe = args_[0];
            }
        }
 
    private:
        boost::shared_array<char*> args_;
    };
 
    template <class Range>
    set_args_<Range> set_args(const Range& range)
    {
        return set_args_<Range>(range);
    }
 
}