1、inih项目下载地址

https://github.com/benhoyt/inih

2、使用说明

它主要包含以下几个比较重要的文件：

• ini.c/ini.h：C语言解析ini文件的实现；
• cpp目录下的INIReader.cpp/INIReader.h：C++解析ini文件的实现；
• examples目录下的test.ini/ini_example.c/INIReaderExample.cpp：C/C++使用示例。

根据README.md描述，项目是用C语言编写的ini文件解析器，只有几页代码，设计的比较小而且简单，所以对嵌入式系统中非常有用。此外，编译时还提供了一些自定义的宏选项，可以根据自己的需求来选择性地设置，更多详细信息参考README.md。

但是需要注意的一点是，该项目只是提供读取ini文件内容的接口，没有提供修改写入的函数接口。（inih-r53版本注）

3、参考示例

① 配置文件（examples/test.ini）

; Test config file for ini_example.c and INIReaderTest.cpp

[protocol]             ; Protocol configuration
version=6              ; IPv6

[user]
name = Bob Smith       ; Spaces around '=' are stripped
email = bob@smith.com  ; And comments (like this) ignored
active = true          ; Test a boolean
pi = 3.14159           ; Test a floating point number

② C语言示例（examples/ini_example.c）

/* Example: parse a simple configuration file */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../ini.h"

typedef struct
{
    int version;
    const char* name;
    const char* email;
} configuration;

static int handler(void* user, const char* section, const char* name,
                   const char* value)
{
    configuration* pconfig = (configuration*)user;

    #define MATCH(s, n) strcmp(section, s) == 0 && strcmp(name, n) == 0
    if (MATCH("protocol", "version")) {
        pconfig->version = atoi(value);
    } else if (MATCH("user", "name")) {
        pconfig->name = strdup(value);
    } else if (MATCH("user", "email")) {
        pconfig->email = strdup(value);
    } else {
        return 0;  /* unknown section/name, error */
    }
    return 1;
}

int main(int argc, char* argv[])
{
    configuration config;

    if (ini_parse("test.ini", handler, &config) < 0) {
        printf("Can't load 'test.ini'\n");
        return 1;
    }
    printf("Config loaded from 'test.ini': version=%d, name=%s, email=%s\n",
        config.version, config.name, config.email);

    free((void*)config.name);
    free((void*)config.email);

    return 0;
}

输出结果：

Config loaded from 'test.ini': version=6, name=Bob Smith, email=bob@smith.com

③ C++示例（examples/INIReaderExample.cpp）

// Example that shows simple usage of the INIReader class

#include <iostream>
#include "../cpp/INIReader.h"

int main()
{
    INIReader reader("../examples/test.ini");

    if (reader.ParseError() < 0) {
        std::cout << "Can't load 'test.ini'\n";
        return 1;
    }
    std::cout << "Config loaded from 'test.ini': version="
              << reader.GetInteger("protocol", "version", -1) << ", name="
              << reader.Get("user", "name", "UNKNOWN") << ", email="
              << reader.Get("user", "email", "UNKNOWN") << ", pi="
              << reader.GetReal("user", "pi", -1) << ", active="
              << reader.GetBoolean("user", "active", true) << "\n";
    std::cout << "Has values: user.name=" << reader.HasValue("user", "name")
              << ", user.nose=" << reader.HasValue("user", "nose") << "\n";
    std::cout << "Has sections: user=" << reader.HasSection("user")
              << ", fizz=" << reader.HasSection("fizz") << "\n";
    return 0;
}

输出结果：

Config loaded from 'test.ini': version=6, name=Bob Smith, email=bob@smith.com, pi=3.14159, active=1
Has values: user.name=1, user.nose=0
Has sections: user=1, fizz=0