node-wad/src/wad.js

A Doom WAD parser and writer.

// Generated by CoffeeScript 1.12.6
var BufferReader, BufferWriter, WAD, WDirectory, WHeader, WLump, fs,
  bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };

fs = require("fs");

WHeader = require("./header.js");

WDirectory = require("./directory.js");

WLump = require("./lump.js");

BufferReader = require("buffer-utils").BufferReader;

BufferWriter = require("buffer-utils").BufferWriter;

WAD = (function() {
  function WAD(bPWAD) {
    this.bPWAD = bPWAD;
    this.addLump = bind(this.addLump, this);
    this.write = bind(this.write, this);
    this.lumps = [];
    this._header = new WHeader(this);
    this._directory = new WDirectory(this);
    this.ptype = null;
  }

  WAD.read = function(buf) {
    var data, dirRead, dirdata, doff, i, llen, loff, lump, lumpData, numLumps, ptype, r, w;
    r = new BufferReader(buf);
    if (r._buffer.length < 12) {
      throw new Error("Invalid or corrupt WAD file: insufficient length for a full header!");
    }
    ptype = r._buffer.slice(0, 4).toString('ascii');
    r.readUInt32LE();
    w = new WAD(ptype === "PWAD");
    w.ptype = ptype;
    numLumps = r.readUInt32LE();
    doff = r.readUInt32LE() - 12;
    data = buf.slice(11);
    if (data.length < doff) {
      throw new Error("Corrupt or incorrect WAD directory offset!");
    }
    lumpData = data.slice(0, doff + 1);
    dirdata = data.slice(doff + 1);
    i = 0;
    while (i * 16 < dirdata.length) {
      dirRead = new BufferReader(dirdata.slice(i * 16, i * 16 + 16));
      loff = dirRead.readUInt32LE() - 11;
      llen = dirRead.readUInt32LE();
      lump = new WLump(this, lumpData.slice(loff, loff + llen).toString(), dirdata.slice(i * 16 + 8, i * 16 + 16).toString());
      w.lumps.push(lump);
      i++;
    }
    return w;
  };

  WAD.prototype.write = function() {
    var bw, j, l, len, ref;
    bw = new BufferWriter();
    this._header.write(bw);
    ref = this.lumps;
    for (j = 0, len = ref.length; j < len; j++) {
      l = ref[j];
      l.write(bw);
    }
    this._directory.write(bw);
    return bw.getContents();
  };

  WAD.prototype.addLump = function(name, data) {
    if (data == null) {
      data = "";
    }
    if (name == null) {
      name = "_";
    }
    this.lumps.push(new WLump(this, data, name));
    return this;
  };

  return WAD;

})();

module.exports = WAD;