// Copyright 2009 The Go Authors.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import Build "build"
import Scanner "scanner"
import Parser "parser"


func PrintHelp() {
  print "go in go (", Build.time, ")\n";
  print "usage:\n";
  print "  go { -v | -vv | file }\n";
  /*
  printf("flags:\n");
  for (int i = 0; Flags[i].name != NULL; i++) {
    printf("  %s  %s\n", Flags[i].name, Flags[i].help);
  }
  */
}


func Compile(filename, src string, verbose int) {
	S := new(Scanner.Scanner);
	S.Open(filename, src);
	
	P := new(Parser.Parser);
	P.Open(S, verbose);
	
	P.ParseProgram();
}


func main() {
	if sys.argc() <= 1 {
		PrintHelp();
		sys.exit(1);
	}
	
	verbose := 0;
	for i := 1; i < sys.argc(); i++ {
		switch sys.argv(i) {
		case "-v":
			verbose = 1;
			continue;
		case "-vv":
			verbose = 2;
			continue;
		}
		
		src, ok := sys.readfile(sys.argv(i));
		if ok {
			print "parsing " + sys.argv(i) + "\n";
			Compile(sys.argv(i), src, verbose);
		} else {
			print "error: cannot read " + sys.argv(i) + "\n";
		}
	}
}