#!/usr/bin/env node
const fs=require("fs");


function print(/*arguments*/){
	//console.log.apply(console,arguments);
	process.stdout.write.apply(process.stdout,arguments);
}

function pad(s,w,c){
	s=s+"";
	if(s.length>=Math.abs(w))return s;
	if(w<0)return s+Array(-w-s.length+1).join(c?c:" ");
	else return Array(w-s.length+1).join(c?c:" ")+s;
}


function readopmap(fname){
	let table=String(fs.readFileSync(fname)).split("\n");
	let i;
	for(i=0;i<table.length;i++){
		if(/Oper.*Prec.*Assoc/.test(table[i]))break;
	}
	let header=table[i];
	table=table.slice(i+1);
	for(i=0;i<table.length;i++){
		if(table[i].length==0)break;
	}
	table=table.slice(0,i);

	let opsidx=header.indexOf("Oper"),
	    precidx=header.indexOf("Prec"),
	    associdx=header.indexOf("Assoc");

	let opmap={};

	for(let row of table){
		let ops=row.slice(opsidx,precidx).trim().split(" "),
		    prec=parseInt(row.slice(precidx,associdx).trim(),10),
		    assoc=row.slice(associdx).replace(/ *([^ ]+).*/,"$1");
		for(let op of ops){
			opmap[op]={prec,assoc};
		}
	}
	return opmap;
}

function outputfunc(opmap,name,gen,padw){
	print("int "+name+"(const char *op){\n");
	print("\tswitch(op[0]){\n");

	let firstchars={};
	for(let k in opmap){
		if(firstchars[k[0]])firstchars[k[0]].push(k);
		else firstchars[k[0]]=[k];
	}
	let arr=[];
	for(k in firstchars){
		arr.push([k,firstchars[k].sort()]);
	}
	arr=arr.sort();
	for(let tup of arr){
		let k=tup[0],ops=tup[1];
		print("\t\tcase '"+k+"': return ");
		for(let op of ops){
			let cond="";
			for(j=1;j<op.length;j++)cond+="op["+j+"]=='"+op[j]+"'&&";
			cond+="op["+j+"]=='\\0'";
			print(cond+" ? "+pad(gen(opmap[op]),padw)+" : ");
		}
		print("-1;\n");
	}

	print("\t\tdefault: return -1;\n");
	print("\t}\n");
	print("}\n");
}


const opmap=readopmap("LANGUAGE.txt");
outputfunc(opmap,"precedence",o=>o.prec,2);
print("\n");
const assocenum={
	"Prefix": "AS_PREFIX", "Suffix": "AS_SUFFIX",
	"Left": "AS_LEFT", "Right": "AS_RIGHT",
	"Nonassociative": "AS_NONASSOC"
};
outputfunc(opmap,"associativity",o=>assocenum[o.assoc],-11);