MprpcConfig类（负责解析配置文件）

• mprpcconfig.h
• mprpcconfig.cc

#pragma once

#include 
#include 

//mprpc中负责解析配置文件的类
class MprpcConfig
{
public:
    //负责解析加载配置文件
    void LoadConfigFile(const char *config_file);
    //查询配置项信息。返回key所对应的value
    std::string Load(const std::string &key);

private:
    //用来存储配置项信息的map
    std::unordered_map m_configMap;
    //去掉字符串前后的空格
    void Trim(std::string &src_buf);
};

#include "mprpcconfig.h"
#include 
#include 

void MprpcConfig::LoadConfigFile(const char *config_file)
{
    FILE *pf = fopen(config_file, "r");
    if (pf == nullptr)
    {
        std::cout << config_file << "is not exist!" << std::endl;
        exit(EXIT_FAILURE);
    }
    while (!feof(pf))
    {
        char buf[512] = {0};
        fgets(buf, 512, pf);
        std::string read_buf(buf);
        Trim(read_buf);
        //如果遇到注释行或空行或文件结束，则直接跳过
        if (read_buf[0] == '#' || read_buf[0] == 'n' || read_buf.empty())
        {
            continue;
        }
        //找到=的下标
        int idx = read_buf.find('=');
        if (idx == -1)
        {
            std::cout << "illegal config" << std::endl;
            exit(EXIT_FAILURE);
        }
        std::string key;
        std::string value;
        Trim(key);
        key = read_buf.substr(0, idx);
        int endidx = read_buf.find('n', idx);
        value = read_buf.substr(idx + 1, endidx - idx - 1);
        Trim(value);
        m_configMap.insert({key, value});
    }
    fclose(pf);
}

std::string MprpcConfig::Load(const std::string &key)
{
    auto it = m_configMap.find(key);
    if (it == m_configMap.end())
    {
        return "cannot find!";
    }
    return it->second;
}

void MprpcConfig::Trim(std::string &src_buf)
{
    int idx = src_buf.find_first_not_of(' ');
    if (idx != -1)
    {
        src_buf = src_buf.substr(idx, src_buf.size() - idx);
    }
    idx = src_buf.find_last_not_of(' ');
    if (idx != -1)
    {
        src_buf = src_buf.substr(0, idx + 1);
    }
}