67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
#pragma once
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#include <string>
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#include <fstream>
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#include <sstream>
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#include "definition.hpp"
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#include "location.hh"
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#include "parser.hpp"
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struct parse_driver;
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void scanner_init(parse_driver* d, yyscan_t* scanner);
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void scanner_destroy(yyscan_t* scanner);
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struct parse_driver {
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std::string file_name;
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std::ifstream file_stream;
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std::ostringstream string_stream;
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yy::location location;
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size_t file_offset;
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std::vector<size_t> line_offsets;
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definition_group global_defs;
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std::string read_file;
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parse_driver(const std::string& file)
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: file_name(file), file_offset(0) {}
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void run_parse() {
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file_stream.open(file_name);
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if(!file_stream.good()) throw 0;
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line_offsets.push_back(0);
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yyscan_t scanner;
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scanner_init(this, &scanner);
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yy::parser parser(scanner, *this);
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parser();
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scanner_destroy(&scanner);
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read_file = string_stream.str();
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}
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int get() {
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int new_char = file_stream.get();
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if(new_char == EOF) return EOF;
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file_offset++;
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if(new_char == '\n') line_offsets.push_back(file_offset);
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string_stream.put(new_char);
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return new_char;
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}
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size_t 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 get_line_end(int line) {
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if(line > line_offsets.size()) return read_file.size();
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return get_index(line+1, 1);
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}
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};
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#define YY_DECL yy::parser::symbol_type yylex(yyscan_t yyscanner, parse_driver& drv)
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YY_DECL;
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