src/main/data/TwoBit.js
function parseSequenceRecord(buffer: ArrayBuffer, fileOffset: number): SequenceRecord {
  var jb = new jBinary(buffer, twoBitTypes.TYPE_SET);
  var header = jb.read('SequenceRecord');

  var dnaOffset = jb.tell() + 8 * header.maskBlockCount + 4;

  return {
    numBases: header.dnaSize,
    unknownBlockStarts: header.nBlockStarts,
    unknownBlockLengths: header.nBlockSizes,
    numMaskBlocks: header.maskBlockCount,
    maskBlockStarts: [],
    maskBlockLengths: [],
    dnaOffsetFromHeader: dnaOffset,
    offset: fileOffset
  };
}
function parseSequenceRecord(buffer: ArrayBuffer, fileOffset: number): SequenceRecord {
  var jb = new jBinary(buffer, twoBitTypes.TYPE_SET);
  var header = jb.read('SequenceRecord');

  var dnaOffset = jb.tell() + 8 * header.maskBlockCount + 4;

  return {
    numBases: header.dnaSize,
    unknownBlockStarts: header.nBlockStarts,
    unknownBlockLengths: header.nBlockSizes,
    numMaskBlocks: header.maskBlockCount,
    maskBlockStarts: [],
    maskBlockLengths: [],
    dnaOffsetFromHeader: dnaOffset,
    offset: fileOffset
  };
}
function parseSequenceRecord ( buffer : ArrayBuffer , fileOffset : number ) : SequenceRecord { var jb = new jBinary ( buffer , twoBitTypes . TYPE_SET ) ; var header = jb . read ( 'SequenceRecord' ) ; var dnaOffset = jb . tell ( ) + 8 * header . maskBlockCount + 4 ; return { numBases : header . dnaSize , unknownBlockStarts : header . nBlockStarts , unknownBlockLengths : header . nBlockSizes , numMaskBlocks : header . maskBlockCount , maskBlockStarts : [ ] , maskBlockLengths : [ ] , dnaOffsetFromHeader : dnaOffset , offset : fileOffset } ; }
Parses a single SequenceRecord from the start of the ArrayBuffer.
fileOffset is the position of this sequence within the 2bit file.
Parses a single SequenceRecord from the start of the ArrayBuffer . fileOffset is the position of this sequence within the 2bit file .