mirror of
https://gitee.com/moluo-tech/AT-Command
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236 lines
6.7 KiB
C
236 lines
6.7 KiB
C
/******************************************************************************
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* @brief 命令行处理
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*
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* Copyright (c) 2015-2020, <morro_luo@163.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2015-06-09 Morro 初版
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*
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* 2017-07-04 Morro 优化字段分割处理
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*
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* 2020-07-05 Morro 使用cli_obj_t对象, 支持多个命令源处理
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******************************************************************************/
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#include "cli.h"
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdbool.h>
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static const cmd_item_t cmd_tbl_start SECTION("cli.cmd.0") = {0};
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static const cmd_item_t cmd_tbl_end SECTION("cli.cmd.4") = {0};
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/*
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* @brief 查找命令
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* @param[in] keyword - 命令关键字
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* @return 命令项
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*/
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static const cmd_item_t *find_cmd(const char *keyword)
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{
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const cmd_item_t *it;
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for (it = &cmd_tbl_start + 1; it < &cmd_tbl_end; it++) {
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if (!strcasecmp(keyword, it->name))
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return it;
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}
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return NULL;
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}
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/*******************************************************************************
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* @brief 字符串分割 - 在源字符串查找出所有由separator指定的分隔符
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* (如',')并替换成字符串结束符'\0'形成子串，同时令list
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* 指针列表中的每一个指针分别指向一个子串
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* @example
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* input=> s = "abc,123,456,,fb$"
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* separator = ",$"
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*
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* output=>s = abc'\0' 123'\0' 456'\0' '\0' fb'\0''\0'
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* list[0] = "abc"
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* list[1] = "123"
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* list[2] = "456"
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* list[3] = ""
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* list[4] = "fb"
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* list[5] = ""
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*
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* @param[in] str - 源字符串
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* @param[in] separator - 分隔字符串
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* @param[in] list - 字符串指针列表
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* @param[in] len - 列表长度
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* @return list指针列表项数，如上例所示则返回6
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******************************************************************************/
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static size_t strsplit(char *s, const char *separator, char *list[], size_t len)
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{
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size_t count = 0;
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if (s == NULL || list == NULL || len == 0)
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return 0;
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list[count++] = s;
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while(*s && count < len) {
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if (strchr(separator, *s) != NULL) {
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*s = '\0';
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list[count++] = s + 1; /*指向下一个子串*/
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}
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s++;
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}
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return count;
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}
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/*
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*@brief 打印一个格式化字符串到串口控制台
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*@retval
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*/
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static void cli_print(cli_obj_t *obj, const char *format, ...)
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{
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va_list args;
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int len;
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char buf[CLI_MAX_CMD_LEN + CLI_MAX_CMD_LEN / 2];
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va_start (args, format);
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len = vsnprintf (buf, sizeof(buf), format, args);
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obj->write(buf, len);
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}
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/*
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* @brief cli 初始化
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* @param[in] p - cli驱动接口
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* @return none
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*/
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void cli_init(cli_obj_t *obj, const cli_port_t *p)
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{
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obj->read = p->read;
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obj->write = p->write;
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obj->print = cli_print;
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obj->enable = true;
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}
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/*
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* @brief 进入cli命令模式(cli此时自动处理用户输入的命令)
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* @param[in] none
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* @return none
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**/
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void cli_enable(cli_obj_t *obj)
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{
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obj->enable = true;
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}
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/*
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* @brief 退出cli命令模式(cli此时不再处理用户输入的命令)
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* @param[in] none
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* @return none
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**/
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void cli_disable (cli_obj_t *obj)
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{
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obj->enable = false;
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}
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/*
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* @brief 处理行
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* @param[in] line - 命令行
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* @return none
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**/
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static void process_line(cli_obj_t *obj)
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{
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char *argv[CLI_MAX_ARGS];
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int argc;
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const cmd_item_t *it;
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argc = strsplit(obj->recvbuf, " ,",argv, CLI_MAX_ARGS);
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if ((it = find_cmd(argv[0])) == NULL) {
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obj->print(obj, "Unknown command '%s' - try 'help'\r\n", argv[0]);
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return;
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}
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it->handler(obj, argc, argv);
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}
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/*
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* @brief 执行一行命令(无论cli是否运行,都会执行)
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* @param[in] none
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* @return none
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**/
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void cli_exec_cmd(cli_obj_t *obj, const char *cmd)
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{
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snprintf(obj->recvbuf, CLI_MAX_CMD_LEN, "%s", cmd);
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process_line(obj);
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}
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/*
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* @brief 命令行处理程序
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* @param[in] none
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* @return none
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**/
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void cli_process(cli_obj_t *obj)
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{
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int i;
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if (!obj->read || !obj->enable)
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return;
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i = obj->recvcnt;
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obj->recvcnt += obj->read(&obj->recvbuf[i], CLI_MAX_CMD_LEN - i);
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while (i < obj->recvcnt) {
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if (obj->recvbuf[i] == '\r' || obj->recvbuf[i] == '\n') { /*读取1行*/
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obj->recvbuf[i] = '\0';
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process_line(obj);
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obj->recvcnt = 0;
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}
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i++;
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}
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}
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/*******************************************************************************
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* @brief 命令比较器
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* @param[in] none
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* @return 参考strcmp
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*******************************************************************************/
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static int cmd_item_comparer(const void *item1,const void *item2)
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{
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cmd_item_t *it1 = *((cmd_item_t **)item1);
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cmd_item_t *it2 = *((cmd_item_t **)item2);
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return strcmp(it1->name, it2->name);
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}
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/*
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* @brief 帮助命令
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*/
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static int do_help (struct cli_obj *s, int argc, char *argv[])
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{
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int i,j, count;
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const cmd_item_t *item_start = &cmd_tbl_start + 1;
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const cmd_item_t *item_end = &cmd_tbl_end;
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const cmd_item_t *cmdtbl[CLI_MAX_CMDS];
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if (argc == 2) {
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if ((item_start = find_cmd(argv[1])) != NULL)
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{
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s->print(s, item_start->brief); /*命令使用信息----*/
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s->print(s, "\r\n");
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}
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return 0;
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}
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for (i = 0; i < item_end - item_start && i < CLI_MAX_ARGS; i++)
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cmdtbl[i] = &item_start[i];
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count = i;
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/*对命令进行排序 ---------------------------------------------------------*/
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qsort(cmdtbl, i, sizeof(cmd_item_t*), cmd_item_comparer);
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s->print(s, "\r\n");
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for (i = 0; i < count; i++) {
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s->print(s, cmdtbl[i]->name); /*打印命令名------*/
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/*对齐调整*/
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j = strlen(cmdtbl[i]->name);
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if (j < 10)
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j = 10 - j;
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while (j--)
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s->print(s, " ");
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s->print(s, "- ");
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s->print(s, cmdtbl[i]->brief); /*命令使用信息----*/
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s->print(s, "\r\n");
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}
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return 1;
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}
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/*注册帮助命令 ---------------------------------------------------------------*/
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cmd_register("help", do_help, "list all command.");
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cmd_register("?", do_help, "alias for 'help'");
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