https://github.com/guonaihong/cflag
cflag is a command line option parsing library written by c,cflag是c写的命令行选项解析库，非常简单好用，没有任何第三方依赖。
https://github.com/guonaihong/cflag
Last synced: about 2 months ago
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cflag is a command line option parsing library written by c,cflag是c写的命令行选项解析库，非常简单好用，没有任何第三方依赖。
- Host: GitHub
- URL: https://github.com/guonaihong/cflag
- Owner: guonaihong
- License: apache-2.0
- Created: 2018-09-15T09:31:02.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2018-11-27T12:31:20.000Z (over 6 years ago)
- Last Synced: 2025-01-30T21:55:09.379Z (4 months ago)
- Language: C
- Homepage:
- Size: 33.2 KB
- Stars: 3
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
##### cflag
##### 主要功能如下
* 可以解析int, bool, str, double, ip, port, addr类型
* 编写扩展类型很简单
##### 主要函数
* 初始化函数
```c
int cflag_init(cflagset_t *c, //cflag核心对象，所以的工作都围绕这个对象
char *name, //进程名
int error_handling); //出错时，可以控制是直接退出进程，还是abort，还是return返回
```
* 解析函数
```c
int cflag_parse(cflagset_t *c,
cflag_t *cf, //存放返回值，命令行选项名，帮助信息，默认值
char **argv); //命令行参数
```
* 销毁函数(c语言特色)
```c
void cflag_free(cflagset_t *c);
```
##### 示例
``` c
#include "cflag.h"
typedef struct config_t {
int nt;
int debug;
char *model_path;
double pi;
unsigned ip;
unsigned short port;
struct sockaddr_in addr;
} config_t;
int main(int argc, char **argv) {
cflagset_t flag;
cflag_init(&flag, argv[0], exit_on_error);
config_t config = {};
cflag_t sets[] = {
{&config.nt, "nt", "0", "Maximum number of threads", cflag_int},
{&config.debug, "debug", "false", "Open the server debug mode", cflag_bool},
{&config.model_path, "model_path", "./", "xxx engine directory", cflag_str},
{&config.pi, "pi", "0", "pi", cflag_double},
{&config.ip, "ip", "0", "Remote server ip", cflag_ip},
{&config.port, "port", "0", "Remote server port", cflag_port},
{&config.addr, "addr", "", "Log server addr", cflag_addr},
{NULL, NULL, NULL, NULL, NULL},
};
cflag_parse(&flag, sets, argv+1);
printf("config.nt = %d\n", config.nt);
printf("config.debug = %d\n", config.debug);
printf("config.model_path = %s\n", config.model_path);
printf("config.pi = %lf\n", config.pi);
printf("config.ip = %x\n", config.ip);
printf("config.port = %x\n", config.port);
printf("config.addr = ip(%x), port(%x)\n", config.addr.sin_addr.s_addr, config.addr.sin_port);
free(config.model_path);
cflag_free(&flag);
return 0;
}
```
##### 编写扩展类型
cflag已经自带, int, bool, str, double, ip, port, addr等多个类型
但是真实世界是复杂的，很可能遇到cflag自带类型不能满足的需求,这时候就学要自己编写扩展类型了
``` c
static inline int cflag_xxx(cflag_t *flag, const char *val) {
flag->isbool = 0; //这行必须加上
xxx new_val = todo(val); //对val进行一些处理, todo 代指用户自己的逻辑
*(xxx *)flag->val = new_val; //把处理后的值赋值给调用端
}
```