1. 获取cpptoml
只需要 cpptoml.h 。
$ git clone https://github.com/skystrife/cpptoml.git
2. TOM配置
mysql.toml配置文件如下：
[Title]
Author="lowkey2046"
[MySQL]
Host="127.0.0.1"
Port=3306
Database="testdb"
Username="root"
Password="lowkey2046"
3. C++代码
mysqltoml.cpp 文件如下：
#include
#include "cpptoml.h"
struct MySQLArg{
std::string host;
int32_t port;
std::string database;
std::string username;
std::string password;
};
bool readMySQLConfig(const char *file, MySQLArg &mysqlArg);
int main(int argc, char **argv)
{
char filename[] = "./mysql.toml";
MySQLArg mysqlArg;
if (readMySQLConfig(filename, mysqlArg)) {
std::cout <
std::cout <
std::cout <
std::cout <
std::cout <
}
return 0;
}
bool readMySQLConfig(const char *file, MySQLArg &mysqlArg)
{
std::shared_ptr<:table> g;
try {
g = cpptoml::parse_file(file);
} catch (const cpptoml::parse_exception &e) {
std::cerr <
return false;
}
auto Strings = [&](const char *key, const char * value)->std::string {
if (g->contains_qualified(key)) {
return g->get_qualified(key)->as<:string>()->get();
}
if (!value)
return std::string();
return std::string(value);
};
auto Integer = [&](const char *key, int value)->int {
if (g->contains_qualified(key)) {
auto integer = g->get_qualified(key)->as()->get();
return static_cast(integer);
}
return value;
};
mysqlArg.host = Strings("MySQL.Host", "127.0.0.1");
mysqlArg.port = Integer("MySQL.Port", 3306);
mysqlArg.database = Strings("MySQL.Database", "testdb");
mysqlArg.username = Strings("MySQL.Useranme", "root");
mysqlArg.password = Strings("MySQL.Password", "123456");
return true;
}
4. 编译
$ g++ -std=c++11 mysqltoml.cpp -o mysqltoml
5. 执行
$ ./mysqltoml
Host:127.0.0.1
Port:3306
Database:testdb
Username:root