src/parser/parser.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

const process = require('node:process');
const fs      = require('node:fs');
const parser  = require('./grammar.js').parser;

parser.yy = {
	pc: 0,

	step: function() { this.pc += 1; },

	equ: {},
	line: {},

	setEqu: function(l, v) {
		this.equ[l] = v;
	},
	setLine: function(l) {
		this.line[l] = this.pc;
	},
	
	getLabel: function(l) {
		if (this.equ[l] !== undefined) {
			return this.equ[l];
		}

		return this.line[l] - this.pc;
	},
};

//if (process.argv[1] === 'parser.js' && process.argv.length >= 3) {
	fs.readFile(process.argv[2], 'utf8', (err, data) => {
		if (err) throw err;
		let result = parser.parse(data.toUpperCase());
		console.log(result);
		console.log(parser.yy);
	});
//}