zzy
23ccebb4ec
feat(main): 添加欢迎信息打印功能 添加了启动时欢迎信息的打印功能，包括当前的构建时间、日期以及欢迎语句。此外，通过函数重命名和更新打印消息，提升了用户交互体验。 此更改包括将`print_help()`调用移动到新的`welcome()`函数中，并在`main()`中调用`welcome()`来执行欢迎信息的打印。 ```
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/***************************************************************************************
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* Copyright (c) 2014-2022 Zihao Yu, Nanjing University
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*
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* NEMU is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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*
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* See the Mulan PSL v2 for more details.
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***************************************************************************************/
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// Modified by: Zhiyi Zhang in 2024.08
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#include "common.h"
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#ifndef PRId32 // dev-cpp 5.11 does not support PRId32
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#define PRId32 "d"
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#endif
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void init_regex(void);
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uint32_t expr(char *e, bool *success);
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static int cmd_q(char *args) {
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return -1;
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}
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static int cmd_help(char *args);
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static int cmd_p(char *args) {
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bool success = true;
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uint32_t res = expr(args, &success);
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if (success) {
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printf("$res = % " PRId32 "\n", res);
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}
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return success;
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}
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static struct {
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const char *name;
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const char *description;
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int (*handler) (char *);
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} cmd_table [] = {
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{ "help", "Display information about all supported commands", cmd_help },
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{ "p", "p EXPR: To evaluate an expression EXPR and output the result", cmd_p },
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{ "q", "Exit NEMU", cmd_q },
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/* TODO: Add more commands */
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};
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#define NR_CMD ARRLEN(cmd_table)
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static void print_help() {
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for (int i = 0; i < NR_CMD; i ++) {
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printf("%s - %s\n", cmd_table[i].name, cmd_table[i].description);
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}
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}
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static int cmd_help(char *args) {
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/* extract the first argument */
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char *arg = strtok(NULL, " ");
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int i;
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if (arg == NULL) {
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/* no argument given */
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print_help();
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}
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else {
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for (i = 0; i < NR_CMD; i ++) {
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if (strcmp(arg, cmd_table[i].name) == 0) {
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printf("%s - %s\n", cmd_table[i].name, cmd_table[i].description);
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return 0;
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}
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}
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printf("Unknown command '%s'\n", arg);
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}
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return 0;
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}
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void welcome(void) {
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Log("Build time: %s, %s", __TIME__, __DATE__);
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printf("Welcome to %s\n", ANSI_FMT("EXPR", ANSI_FG_YELLOW ANSI_BG_RED));
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printf("For help, type \"help\"\n");
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}
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int main(int argc, char **argv) {
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static char str[1024] = { 0 };
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bool running = true;
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init_regex();
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welcome();
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while (running) {
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printf("(expr) ");
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if (!fgets(str, 1024, stdin)) {
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continue;
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}
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str[strlen(str) - 1] = '\0';
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char *str_end = str + strlen(str);
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/* extract the first token as the command */
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char *cmd = strtok(str, " ");
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if (cmd == NULL) { continue; }
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/* treat the remaining string as the arguments,
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* which may need further parsing
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*/
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char *args = cmd + strlen(cmd) + 1;
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if (args >= str_end) {
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args = NULL;
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}
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int i;
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for (i = 0; i < NR_CMD; i ++) {
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if (strcmp(cmd, cmd_table[i].name) == 0) {
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if (cmd_table[i].handler(args) < 0) { return -1; }
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break;
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}
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}
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if (i == NR_CMD) { printf("Unknown command '%s'\n", cmd); }
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}
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return 0;
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} |