解析非常简单的配置文件 [英] Parsing a Very Simply Config File

问题描述

我在C ++中编写一个OBDII阅读库/应用程序。通过发送一个简单的字符串命令，然后将结果通过每个参数的特定函数，从汽车的计算机检索数据。

我想读取配置文件我想要的所有命令，可能是这样：

 名称，命令，函数
 
引擎RPM ，010C，（（256 * A）+ B）/ 4 
速度，010D，A 
  

基本上，非常简单，所有数据都需要以字符串形式读入。任何人都可以推荐一个好的简单的库为此？

解决方案

您可以使用 std :: ifstream 逐行读取 和 boost :: split 以， p>

示例代码：

您可以检查令牌大小以检查加载的文件的完整性。

  #include< fstream> 
 #include< vector> 
 #include< boost / algorithm / string / split.hpp> 
 #include< boost / algorithm / string / classification.hpp> 
 
 int main（int argc，char * argv []）{
 std :: ifstream ifs（e：\\\save.txt）; 
 
 std :: string line; 
 std :: vector< std :: string>令牌
 while（std :: getline（ifs，line））{
 boost :: split（tokens，line，boost :: is_any_of（，））; 
 if（line.empty（））
 continue; 
 
 for（const auto& t：tokens）{
 std :: cout< t < std :: endl; 
} 
} 
 
 return 0; 
} 
  

您也可以使用 String Toolkit Library 如果你不想实现。 文档

I am writing a OBDII reading library / application in C++. Data is retrieved from the car's computer by sending a simple string command, then passing the result through a function specific to each parameter.

I would like to read a config file of all the commands I want, something like this perhaps:

Name, Command, function

Engine RPM, 010C, ((256*A)+B)/4
Speed, 010D, A

Basically, very simple, all data needs to just be read in as a string. Can anyone recommend a good simple library for this? My target is g++ and/ or Clang on Linux if that matters.

解决方案

You could use std::ifstream to read line by line, and boost::split to split the line by ,.

Sample code:

You could check tokens size for sanity checks of file loaded.

#include <fstream>
#include <vector>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>

int main(int argc, char* argv[]) {
    std::ifstream ifs("e:\\save.txt");

    std::string line;
    std::vector<std::string> tokens;
    while (std::getline(ifs, line)) {
        boost::split(tokens, line, boost::is_any_of(","));
        if (line.empty())
            continue;

        for (const auto& t : tokens) {
            std::cout << t << std::endl;
        }
    }

    return 0;
}

You could also use String Toolkit Library if you don't want to implemented. Docs

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