Full Code of jiejieTop/cmd-parser for AI

Repository: jiejieTop/cmd-parser
Branch: master
Commit: 2fb348d44210
Files: 6
Total size: 17.3 KB

Directory structure:
gitextract_wra0t7qr/

├── .gitignore
├── LICENSE
├── README.md
├── cmd.c
├── cmd.h
└── test.c

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.vscode


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FILE: LICENSE
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================================================
FILE: README.md
================================================
![](https://img.shields.io/badge/build-passing-brightgreen.svg)
[![license](https://img.shields.io/badge/license-Apache-blue.svg)](https://github.com/jiejieTop/cmd-parser/blob/master/LICENSE)
![](https://img.shields.io/badge/platform-MDK|IAR-orange.svg)

# cmd-parser

一个非常简单好用的命令解析器...

这个命令解析器有什么用？？

> 简单来说，我希望我的开发板，可以通过命令执行一些处理，比如说我用串口发一个命令`A`，开发板就执行`A`的一些处理，或者，在调试某些`AT`模组的时候，当我收到模组返回的一些指令后，自动执行一些处理。当然，还有其他的地方可以用得上的，兄弟们自行挖掘！！欢迎提交**pr**与点个**star**~

## 问题

欢迎以 [GitHub Issues](https://github.com/jiejieTop/mqttclient/issues) 的形式提交问题和bug报告

## 版权和许可

cmd-parser 遵循 [Apache License v2.0](https://github.com/jiejieTop/mqttclient/blob/master/LICENSE) 开源协议。鼓励代码共享和尊重原作者的著作权，可以自由的使用、修改源代码，也可以将修改后的代码作为开源或闭源软件发布，**但必须保留原作者版权声明**。

## 使用方法

1. 注册命令

在工程中的任意位置均可调用（在函数外）

```c
REGISTER_CMD(test1, test1_cmd);
```

2. cmd初始化

```c
cmd_init();
```

3. 解析命令

```c
cmd_parsing("test1");
```

## 特色

- 用户无需关心命令的存储区域与大小，由编译器静态分配。
- 加入哈希算法超快速匹配命令，时间复杂度从O(n*m)变为O(n)。
- 命令支持忽略大小写。
- 非常易用与非常简洁的代码（不足150行）。

## 注意事项

- 本代码目前只支持`MDK`与`IAR`的编译器，对于`gcc`尚未移植，欢迎参与贡献


## test.c
```c
#include "cmd.h"

void test1_cmd(void)
{
    printf("test1_cmd\n");
}

void test2_cmd(void)
{
    printf("test2_cmd\n");
}

void test3_cmd(void)
{
    printf("test3_cmd\n");
}

REGISTER_CMD(test1, test1_cmd);
REGISTER_CMD(test2, test2_cmd);
REGISTER_CMD(test3, test3_cmd);

int main(void)
{
    cmd_init();

    while (1)
    {
        cmd_parsing("test1");
        cmd_parsing("test2");
        cmd_parsing("test3");
    }
    
    return 0;
}
```


================================================
FILE: cmd.c
================================================
/*
 * @Author: jiejie
 * @Github: https://github.com/jiejieTop
 * @Date: 2019-12-13 10:47:30
 * @LastEditTime: 2020-05-16 15:53:35
 * @Description: the code belongs to jiejie, please keep the author information and source code according to the license.
 */
#include "cmd.h"
#include <stdio.h>

static cmd_t *_cmd_begin, *_cmd_end;

static int _cmd_to_lower(int c)
{
    if ((c >= 'A') && (c <= 'Z'))
        return c + ('a' - 'A');
    return c;
}

static unsigned int _cmd_hash(const char* str)
{
    int tmp, c = *str;
    unsigned int seed = CMD_HASH;  /* 'jiejie' string hash */  
    unsigned int hash = 0;
    
    while(*str) {
        tmp = _cmd_to_lower(c);
        hash = (hash ^ seed) + tmp;
        str++;
        c = *str;
    }
    return hash;
}

static void _cmd_init(const void *begin, const void *end)
{
    _cmd_begin = (cmd_t*) begin;
    _cmd_end = (cmd_t*) end;
}

static cmd_t* _get_next_cmd(cmd_t *cmd)
{
    unsigned int *ptr;
    ptr = (unsigned int*) (cmd + 1);
    while ((*ptr == 0) && ((unsigned int*)ptr < (unsigned int*) _cmd_end))
        ptr ++;

    return (cmd_t*) ptr;
}

static int _cmd_match(const char *str, const char *cmd)
{
    int c1, c2;

    do {
        c1 = _cmd_to_lower(*str++);
        c2 = _cmd_to_lower(*cmd++);
    } while((c1 == c2) && c1);

    return c1 - c2;
}

static void _list(void)
{
    cmd_t *index;
    for (index = _cmd_begin; index < _cmd_end; index = _get_next_cmd(index)) {
        printf("%s -->%s\n",index->cmd,index->desc);
    }
}
REGISTER_CMD(_list, _list,list all command);

void cmd_init(void)
{
    cmd_t *index;

#if defined(__CC_ARM) || defined(__CLANG_ARM)          /* ARM C Compiler */
    extern const int CMDS$$Base;
    extern const int CMDS$$Limit;
    _cmd_init(&CMDS$$Base, &CMDS$$Limit);
#elif defined (__ICCARM__) || defined(__ICCRX__)      /* for IAR Compiler */
    _cmd_init(__section_begin("CMDS"), __section_end("CMDS"));
#endif

    for (index = _cmd_begin; index < _cmd_end; index = _get_next_cmd(index)) {
        index->hash = _cmd_hash(index->cmd);
    }

}

void cmd_parsing(char *str)
{
    cmd_t *index;
    unsigned int hash = _cmd_hash(str);
    
    for (index = _cmd_begin; index < _cmd_end; index = _get_next_cmd(index)) {
        if (hash == index->hash) {
            if (_cmd_match(str, index->cmd) == 0) {
                index->handler();
                break;
            }
        }
    }
}


================================================
FILE: cmd.h
================================================
/*
 * @Author: jiejie
 * @Github: https://github.com/jiejieTop
 * @Date: 2019-12-13 10:48:52
 * @LastEditTime: 2019-12-16 21:26:56
 * @Description: the code belongs to jiejie, please keep the author information and source code according to the license.
 */
#ifndef _CMD_H_
#define _CMD_H_

#define CMD_HASH 0xb433e5c6

#if defined(__CC_ARM) || defined(__CLANG_ARM)   /* ARM Compiler */
    #define SECTION(x)                  __attribute__((section(x)))
    #define CMD_USED                    __attribute__((used))

#elif defined (__IAR_SYSTEMS_ICC__)             /* IAR Compiler */
    #define SECTION(x)                  @ x
    #define CMD_USED                    __root
#else
    #error "not supported tool chain..."
#endif


typedef void (*cmd_handler)(void);

typedef struct cmd {
    const char*     cmd;
    const char*     cmd_mess;
    unsigned int    hash;
    cmd_handler     handler;
} cmd_t;

#define REGISTER_CMD(cmd, handler,desc)                         \
    const char _register_##cmd##_cmd[] = #cmd;                  \
    const char _register_##cmd##_desc[] = #desc;                \
    CMD_USED cmd_t _register_##cmd SECTION("CMDS")=             \
    {                                                           \
        _register_##cmd##_cmd,                                  \
        _register_##cmd##_desc,                                 \
        (unsigned int)CMD_HASH,                                 \
        (cmd_handler)&handler                                   \
    };

void cmd_init(void);
void cmd_parsing(char *str);

#endif



================================================
FILE: test.c
================================================
/*
 * @Author: jiejie
 * @Github: https://github.com/jiejieTop
 * @Date: 2019-12-13 19:15:30
 * @LastEditTime: 2019-12-17 13:38:49
 * @Description: the code belongs to jiejie, please keep the author information and source code according to the license.
 */
#include "cmd.h"

void test1_cmd(void)
{
    printf("test1_cmd\n");
}

void test2_cmd(void)
{
    printf("test2_cmd\n");
}

void test3_cmd(void)
{
    printf("test3_cmd\n");
}

REGISTER_CMD(test1, test1_cmd,test1 demo);
REGISTER_CMD(test2, test2_cmd,test2 demo);
REGISTER_CMD(test3, test3_cmd,test3 demo);

int main(void)
{
    cmd_init();

    while (1)
    {
        cmd_parsing("_list");
        cmd_parsing("test1");
        cmd_parsing("test2");
        cmd_parsing("test3");
        delay(1000);
    }
    
    return 0;
}