/*
 * .============.
 * // M A K E / \
 * // C++ DEV / \
 * // E A S Y / \/ \
 * ++ ----------. \/\ .
 * \\ \ \ /\ /
 * \\ \ \ /
 * \\ \ \ /
 * -============'
 *
 * Copyright (c) 2018 Hevake and contributors, all rights reserved.
 *
 * This file is part of cpp-tbox (https://github.com/cpp-main/cpp-tbox)
 * Use of this source code is governed by MIT license that can be found
 * in the LICENSE file in the root of the source tree. All contributing
 * project authors may be found in the CONTRIBUTORS.md file in the root
 * of the source tree.
 */
#include "split_cmdline.h"

namespace tbox {
namespace util {

using namespace std;

bool SplitCmdline(const std::string &cmd, std::vector<std::string> &args)
{
 args.clear();

 size_t start_pos = 0;
 size_t end_pos = 0;

 while (true) {
 start_pos = cmd.find_first_not_of(" \t", end_pos);
 if (start_pos == std::string::npos)
 break;

 char start_char = cmd.at(start_pos);
 if (start_char == '\'' || start_char == '\"') {
 end_pos = cmd.find_first_of(start_char, start_pos + 1);
 if (end_pos == std::string::npos)
 return false;

 args.push_back(cmd.substr(start_pos + 1, end_pos - start_pos - 1));
 ++end_pos;
 } else {
 end_pos = cmd.find_first_of(" \t", start_pos);

 //! think of:
 //! --key="hello world"and'I am here'
 //! as whole string
 auto quot_start_pos = cmd.find_first_of("\'\"", start_pos);
 while (quot_start_pos != std::string::npos && (quot_start_pos < end_pos || end_pos == std::string::npos)) {
 char quot_char = cmd.at(quot_start_pos);
 auto quot_end_pos = cmd.find_first_of(quot_char, quot_start_pos + 1);
 if (quot_end_pos == std::string::npos)
 return false;
 end_pos = cmd.find_first_of(" \t", quot_end_pos + 1);
 quot_start_pos = cmd.find_first_of("\'\"", quot_end_pos + 1);
 }

 args.push_back(cmd.substr(start_pos, end_pos - start_pos));
 if (end_pos == std::string::npos)
 break;
 }
 }

 return true;
}

}
}