56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
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#include "parse_driver.hpp"
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#include "scanner.hpp"
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#include <sstream>
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bool parse_driver::run_parse() {
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FILE* stream = fopen(file_name.c_str(), "r");
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if(!stream) return false;
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string_stream = std::ostringstream();
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file_offset = 0;
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line_offsets.push_back(0);
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yyscan_t scanner;
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yylex_init(&scanner);
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yyset_in(stream, scanner);
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yy::parser parser(scanner, *this);
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parser();
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yylex_destroy(scanner);
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fclose(stream);
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file_contents = string_stream.str();
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return true;
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}
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void parse_driver::write(const char* buf, size_t len) {
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string_stream.write(buf, len);
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file_offset += len;
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}
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void parse_driver::mark_line() {
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line_offsets.push_back(file_offset);
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}
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size_t parse_driver::get_index(int line, int column) {
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assert(line > 0);
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assert(line <= line_offsets.size());
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size_t file_offset = line_offsets[line-1];
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file_offset += column - 1;
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return file_offset;
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}
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size_t parse_driver::get_line_end(int line) {
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if(line > line_offsets.size()) return file_contents.size();
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return get_index(line+1, 1);
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}
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void parse_driver::print_highlighted_location(std::ostream& stream, const yy::location& loc) {
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size_t print_start = get_index(loc.begin.line, 1);
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size_t highlight_start = get_index(loc.begin.line, loc.begin.column);
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size_t highlight_end = get_index(loc.end.line, loc.end.column);
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size_t print_end = get_line_end(loc.end.line);
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const char* content = file_contents.c_str();
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stream.write(content + print_start, highlight_start - print_start);
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stream << "\033[4;31m";
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stream.write(content + highlight_start, highlight_end - highlight_start);
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stream << "\033[0m";
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stream.write(content + highlight_end, print_end - highlight_end);
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}
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