function getBlockAxisName(elem) {
  var wm = getComputedStyle(elem).writingMode;
  return (!wm || wm == 'horizontal-tb') ? 'height' : 'width';
}

function getBSize(elem) {
  return elem.getBoundingClientRect()[getBlockAxisName(elem)] + 'px';
}

function setBSize(elem, bsize) {
  elem.style[getBlockAxisName(elem)] = bsize;
  elem.style.lineHeight = bsize;
}

function makeBSizeMatchInlineBox(block, inline) {
  setBSize(block, getBSize(inline));
}