update label style and add implicit second operand

1 files changed, 36 insertions, 0 deletions

diff --git a/src/parser/parser.js b/src/parser/parser.js
new file mode 100644
index 0000000..ef84be3
--- /dev/null
+++ b/src/parser/parser.js
@@ -0,0 +1,36 @@
+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);
+	});
+//}