detail/posix/cmd.hpp

0001 // Copyright (c) 2016 Klemens D. Morgenstern
0002 //
0003 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0004 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0005
0006
0007 #ifndef BOOST_PROCESS_DETAIL_POSIX_CMD_HPP_
0008 #define BOOST_PROCESS_DETAIL_POSIX_CMD_HPP_
0009
0010 #include <boost/process/v1/detail/config.hpp>
0011 #include <boost/process/v1/detail/posix/handler.hpp>
0012 #include <string>
0013 #include <vector>
0014
0015 namespace boost
0016 {
0017 namespace process
0018 {
0019 BOOST_PROCESS_V1_INLINE namespace v1
0020 {
0021 namespace detail
0022 {
0023 namespace posix
0024 {
0025
0026
0027 template<typename Char>
0028 inline std::vector<std::basic_string<Char>> build_cmd(const std::basic_string<Char> & value)
0029 {
0030     std::vector<std::basic_string<Char>>  ret;
0031
0032     bool in_quotes = false;
0033     auto beg = value.begin();
0034     for (auto itr = value.begin(); itr != value.end(); itr++)
0035     {
0036         if (*itr == quote_sign<Char>())
0037             in_quotes = !in_quotes;
0038
0039         if (!in_quotes && (*itr == space_sign<Char>()))
0040         {
0041             if (itr != beg)
0042             {
0043                 ret.emplace_back(beg, itr);
0044                 beg = itr + 1;
0045             }
0046         }
0047     }
0048     if (beg != value.end())
0049         ret.emplace_back(beg, value.end());
0050
0051     return ret;
0052 }
0053
0054 template<typename Char>
0055 struct cmd_setter_ : handler_base_ext
0056 {
0057     typedef Char value_type;
0058     typedef std::basic_string<value_type> string_type;
0059
0060     cmd_setter_(string_type && cmd_line)      : _cmd_line(api::build_cmd(std::move(cmd_line))) {}
0061     cmd_setter_(const string_type & cmd_line) : _cmd_line(api::build_cmd(cmd_line)) {}
0062     template <class Executor>
0063     void on_setup(Executor& exec)
0064     {
0065         exec.exe = _cmd_impl.front();
0066         exec.cmd_line = &_cmd_impl.front();
0067         exec.cmd_style = true;
0068     }
0069     string_type str() const
0070     {
0071         string_type ret;
0072         std::size_t size = 0;
0073         for (auto & cmd : _cmd_line)
0074             size += cmd.size() + 1;
0075         ret.reserve(size -1);
0076
0077         for (auto & cmd : _cmd_line)
0078         {
0079             if (!ret.empty())
0080                 ret += equal_sign<Char>();
0081             ret += cmd;
0082         }
0083         return ret;
0084     }
0085 private:
0086     static inline std::vector<Char*> make_cmd(std::vector<string_type> & args);
0087     std::vector<string_type> _cmd_line;
0088     std::vector<Char*> _cmd_impl  = make_cmd(_cmd_line);
0089 };
0090
0091 template<typename Char>
0092 std::vector<Char*> cmd_setter_<Char>::make_cmd(std::vector<std::basic_string<Char>> & args)
0093 {
0094     std::vector<Char*> vec;
0095
0096     for (auto & v : args)
0097         vec.push_back(&v.front());
0098
0099     vec.push_back(nullptr);
0100
0101     return vec;
0102 }
0103
0104 }}}}}
0105
0106 #endif