@maniajs/gbxparser/lib/util/parser-extensions.js

ManiaPlanet GBX File Parser.

/**
 * Special Parser Overrides
 */
'use strict';

var BufferReader = require('buffer-reader');

BufferReader.prototype.nextGbxString = function () {
  // [len] [string...(until len reached)]
  var len = this.nextUInt32LE();
  return this.nextString(len);
};

BufferReader.prototype.nextLookBackString = function () {
  // Lookback Baguette
  if (!this.lookbackSeen) {
    var version = this.nextUInt32LE();
    // console.log('Init lookback registry, version of LBS: ' + version);
    this.lookbackSeen = true;
    this.lookbackStore = [];
  }

  var inp = this.nextUInt32LE();
  if (inp === 0) {
    return null;
  }
  if ((inp & 0xc0000000) !== 0 && (inp & 0x3fffffff) === 0 || inp === 0) {
    var str = this.nextGbxString();
    this.lookbackStore.push(str);
    return str;
  }
  if (inp === 0xffffffff) return '';

  if ((inp & 0x3fffffff) === inp) {
    switch (inp) {// The string could be in the predefined libary...
      case 11:
        return 'Valley';
      case 12:
        return 'Canyon';
      case 13:
        return 'Lagoon';
      case 17:
        return 'TMCommon';
      case 202:
        return 'Storm';
      case 299:
        return 'SMCommon';
      case 10003:
        return 'Common';
    }
  }
  inp &= 0x3fffffff;
  if (inp - 1 >= this.lookbackStore.length) {
    throw new Error('String not found in lookback list!. Offset: ' + this.tell());
  }
  return this.lookbackStore[inp - 1];
};

BufferReader.prototype.resetLookBackStrings = function () {
  if (this.lookbackSeen) {
    this.lookbackStore = [];
    this.lookbackSeen = false;
  }
};