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8fd94dad01
- 从'ANSI_FMT'宏中移除ANSI转义码，以适应不支持颜色的终端。 - 现在可以通过定义'ANSI_FMT_DISABLE'宏来禁用ANSI转义码。 refactor(gen-expr): 改进代码格式和临时文件处理 - 在gen-expr.c中进行了代码格式调整，以保持一致的风格。 - 优化了临时文件的处理方式，确保路径和命令在不同操作系统上的兼容性。 refactor(main): 调整打印格式和字符串分割逻辑 - 修正了main.c中的打印格式化字符串，以适应不同编译器的规范。 - 改进了命令帮助功能的字符串分割逻辑，以正确处理子命令查询。 update(README): 添加编译和运行说明，禁用ANSI转义码说明 - 在README.md中添加了关于项目编译和运行的说明，包括C++11标准的要求。 - 提供了关于在不支持ANSI转义码的终端上禁用它的说明。 fix(.gitignore): 忽略所有文件但特定文件除外 - 修正了'.gitignore'文件，以忽略所有文件，但'.gitignore'、'.c'、'.cpp'、'.h'和'.md'文件以及'Makefile'除外。
121 lines
3.1 KiB
C
121 lines
3.1 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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int main(int argc, char **argv) {
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static char str[1024] = { 0 };
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init_regex();
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print_help();
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bool running = true;
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while (running) {
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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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} |