set_cmd_line.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/tokenizer.hpp>
#include <boost/shared_array.hpp>
#include <string>
#include <vector>
 
namespace boost::process::posix::initializers
{
 
    class set_cmd_line : public initializer_base
    {
    private:
        static char* c_str(const std::string& s)
        {
            return const_cast<char*>(s.c_str());
        }
 
    public:
        explicit set_cmd_line(const std::string& s)
        {
            using tokenizer = boost::tokenizer<boost::escaped_list_separator<char> >;
            boost::escaped_list_separator<char> sep('\\', ' ', '\"');
            tokenizer tok(s, sep);
            args_.assign(tok.begin(), tok.end());
            cmd_line_.reset(new char* [args_.size() + 1]);
            boost::transform(args_, cmd_line_.get(), c_str);
            cmd_line_[args_.size()] = 0;
        }
 
        template <class PosixExecutor>
        void on_exec_setup(PosixExecutor& e) const
        {
            e.cmd_line = cmd_line_.get();
        }
 
    private:
        std::vector<std::string> args_;
        boost::shared_array<char*> cmd_line_;
    };
 
}