97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
//
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// Created for error reporting
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "parser.h"
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#include "../utils/file.h"
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// ANSI 转义序列颜色代码
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#define ANSI_COLOR_RED "\033[31m"
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#define ANSI_COLOR_YELLOW "\033[33m"
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#define ANSI_COLOR_CYAN "\033[36m"
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#define ANSI_COLOR_RESET "\033[0m"
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// 获取指定行的代码
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static char* get_line_at(const char* source, int line_number) {
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if (source == NULL || line_number <= 0) return NULL;
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int current_line = 1;
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const char* line_start = source;
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const char* p = source;
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// 找到指定行的起始位置
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while (*p != '\0') {
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if (current_line == line_number) {
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line_start = p;
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break;
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}
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if (*p == '\n') {
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current_line++;
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}
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p++;
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}
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// 如果没找到指定行，返回NULL
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if (current_line != line_number) return NULL;
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// 找到行的结束位置
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p = line_start;
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while (*p != '\0' && *p != '\n') p++;
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// 复制行内容
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int length = p - line_start;
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char* line = (char*)malloc(length + 1);
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if (line == NULL) return NULL;
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strncpy(line, line_start, length);
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line[length] = '\0';
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return line;
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}
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// 在指定位置打印错误指示箭头
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static void print_error_indicator(int column) {
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// 打印错误指示箭头
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fprintf(stderr, " | " ANSI_COLOR_RED);
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for (int i = 1; i < column; i++) {
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fprintf(stderr, "~");
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}
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// 打印错误指示箭头
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fprintf(stderr, "^" ANSI_COLOR_RESET "\n");
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}
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// 在当前token位置报告错误
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void parser_error_at_current(Parser* parser, const char* message) {
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parser_error_at(parser, &parser->current_token, message);
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exit(0);
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}
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void parser_error_at(Parser* parser, Token* token, const char* message) {
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if (parser->had_error) return;
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// 添加错误到errors数组
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parser->error_count++;
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parser->errors = realloc(parser->errors, sizeof(*parser->errors) * parser->error_count);
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parser->errors[parser->error_count - 1].message = strdup(message);
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parser->errors[parser->error_count - 1].line = token->line;
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parser->errors[parser->error_count - 1].column = token->column;
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// 打印错误位置和消息
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fprintf(stderr, ANSI_COLOR_CYAN "%s" ANSI_COLOR_RESET ":"
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ANSI_COLOR_YELLOW "%d:%d" ANSI_COLOR_RESET ": "
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ANSI_COLOR_RED "Syntax error: %s" ANSI_COLOR_RESET "\n",
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parser->filename, token->line, token->column, message);
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char* source = read_file(parser->filename);
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if (source != NULL) {
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char* line = get_line_at(source, token->line);
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if (line != NULL) {
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fprintf(stderr, "%4d | %s\n", token->line, line);
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print_error_indicator(token->column);
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free(line);
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}
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free(source);
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}
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} |