// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// Global constants.
class Const {
  // Bytes for "HTTP".
  static const HTTP = const [72, 84, 84, 80];
  // Bytes for "HTTP/1.".
  static const HTTP1DOT = const [72, 84, 84, 80, 47, 49, 46];
  // Bytes for "HTTP/1.0".
  static const HTTP10 = const [72, 84, 84, 80, 47, 49, 46, 48];
  // Bytes for "HTTP/1.1".
  static const HTTP11 = const [72, 84, 84, 80, 47, 49, 46, 49];

  static const bool T = true;
  static const bool F = false;
  // Lookup-map for the following characters: '()<>@,;:\\"/[]?={} \t'.
  static const SEPARATOR_MAP = const [
    F, F, F, F, F, F, F, F, F, T, F, F, F, F, F, F, F, F, F, F, F, F, F, F, //
    F, F, F, F, F, F, F, F, T, F, T, F, F, F, F, F, T, T, F, F, T, F, F, T, //
    F, F, F, F, F, F, F, F, F, F, T, T, T, T, T, T, T, F, F, F, F, F, F, F, //
    F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, T, T, T, F, F, //
    F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, //
    F, F, F, T, F, T, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, //
    F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, //
    F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, //
    F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, //
    F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, //
    F, F, F, F, F, F, F, F, F, F, F, F, F, F, F, F
  ];
}

// Frequently used character codes.
class CharCode {
  static const int HT = 9;
  static const int LF = 10;
  static const int CR = 13;
  static const int SP = 32;
  static const int AMPERSAND = 38;
  static const int COMMA = 44;
  static const int DASH = 45;
  static const int SLASH = 47;
  static const int ZERO = 48;
  static const int ONE = 49;
  static const int COLON = 58;
  static const int SEMI_COLON = 59;
  static const int EQUAL = 61;

  static bool isTokenChar(int byte) {
    return byte > 31 && byte < 128 && !Const.SEPARATOR_MAP[byte];
  }

  static bool isValueChar(int byte) {
    return (byte > 31 && byte < 128) ||
        (byte == CharCode.SP) ||
        (byte == CharCode.HT);
  }
}