kevinw · December 3, 2010 19:08
diff --git a/gistfile1.mustache b/gistfile1.mustache
 <html>
    <head>
 <script>
 var natcompare = (function() {
  var isWhitespaceChar = function(a)
  {
    var charCode;
    charCode = a.charCodeAt(0);

    if ( charCode <= 32 )
    {
      return true;
    }
    else
    {
      return false;
    }
  }

  var isDigitChar = function(a)
  {
    var charCode;
    charCode = a.charCodeAt(0);

    if ( charCode >= 48  && charCode <= 57 )
    {
      return true;
    }
    else
    {
      return false;
    }
  }

  var compareRight = function(a,b)
  {
    var bias = 0;
    var ia = 0;
    var ib = 0;

    var ca;
    var cb;

    // The longest run of digits wins.  That aside, the greatest
    // value wins, but we can't know that it will until we've scanned
    // both numbers to know that they have the same magnitude, so we
    // remember it in BIAS.
    for (;; ia++, ib++) {
      ca = a.charAt(ia);
      cb = b.charAt(ib);

      if (!isDigitChar(ca)
          && !isDigitChar(cb)) {
        return bias;
      } else if (!isDigitChar(ca)) {
        return -1;
      } else if (!isDigitChar(cb)) {
        return +1;
      } else if (ca < cb) {
        if (bias == 0) {
          bias = -1;
        }
      } else if (ca > cb) {
        if (bias == 0)
          bias = +1;
      } else if (ca == 0 && cb == 0) {
        return bias;
      }
    }
  }

  return function (a,b) {

    var ia = 0, ib = 0;
    var nza = 0, nzb = 0;
    var ca, cb;
    var result;

    while (true)
    {
      // only count the number of zeroes leading the last number compared
      nza = nzb = 0;

      ca = a.charAt(ia);
      cb = b.charAt(ib);

      // skip over leading spaces or zeros
      while ( isWhitespaceChar( ca ) || ca =='0' ) {
        if (ca == '0') {
          nza++;
        } else {
          // only count consecutive zeroes
          nza = 0;
        }

        ca = a.charAt(++ia);
      }

      while ( isWhitespaceChar( cb ) || cb == '0') {
        if (cb == '0') {
          nzb++;
        } else {
          // only count consecutive zeroes
          nzb = 0;
        }

        cb = b.charAt(++ib);
      }

      // process run of digits
      if (isDigitChar(ca) && isDigitChar(cb)) {
        if ((result = compareRight(a.substring(ia), b.substring(ib))) != 0) {
          return result;
        }
      }

      if (ca == 0 && cb == 0) {
        // The strings compare the same.  Perhaps the caller
        // will want to call strcmp to break the tie.
        return nza - nzb;
      }

      if (ca < cb) {
        return -1;
      } else if (ca > cb) {
        return +1;
      }

      ++ia; ++ib;
    }
  }
 }());
 </script>
    </head>
    <body>
        <script>
            function updateCmp() {
                setTimeout(function() {
                var a = document.natcomparecheck.val1.value;
                var b = document.natcomparecheck.val2.value;
                var cmpresult = document.getElementById('cmpresult');
                if (cmpresult)
                    cmpresult.innerHTML = natcompare(a, b);
                }, 1);
            }
        </script>
        <form name="natcomparecheck">
            natcompare(
            <input name="val1" value="10705970246197248" onchange="updateCmp()" onkeypress="updateCmp()" onkeydown="updateCmp()">
            ,
            <input name="val2" value="9999625058521088" onchange="updateCmp()" onkeypress="updateCmp()" onkeydown="updateCmp()">
            ) = 
            <span id="cmpresult"></span>
        </form>
        <script>
            updateCmp();
        </script>
    </body>
 </html>
	<html>
	<head>
	<script>
	var natcompare = (function() {
	var isWhitespaceChar = function(a)
	{
	var charCode;
	charCode = a.charCodeAt(0);

	if ( charCode <= 32 )
	{
	return true;
	}
	else
	{
	return false;
	}
	}

	var isDigitChar = function(a)
	{
	var charCode;
	charCode = a.charCodeAt(0);

	if ( charCode >= 48 && charCode <= 57 )
	{
	return true;
	}
	else
	{
	return false;
	}
	}

	var compareRight = function(a,b)
	{
	var bias = 0;
	var ia = 0;
	var ib = 0;

	var ca;
	var cb;

	// The longest run of digits wins. That aside, the greatest
	// value wins, but we can't know that it will until we've scanned
	// both numbers to know that they have the same magnitude, so we
	// remember it in BIAS.
	for (;; ia++, ib++) {
	ca = a.charAt(ia);
	cb = b.charAt(ib);

	if (!isDigitChar(ca)
	&& !isDigitChar(cb)) {
	return bias;
	} else if (!isDigitChar(ca)) {
	return -1;
	} else if (!isDigitChar(cb)) {
	return +1;
	} else if (ca < cb) {
	if (bias == 0) {
	bias = -1;
	}
	} else if (ca > cb) {
	if (bias == 0)
	bias = +1;
	} else if (ca == 0 && cb == 0) {
	return bias;
	}
	}
	}

	return function (a,b) {

	var ia = 0, ib = 0;
	var nza = 0, nzb = 0;
	var ca, cb;
	var result;

	while (true)
	{
	// only count the number of zeroes leading the last number compared
	nza = nzb = 0;

	ca = a.charAt(ia);
	cb = b.charAt(ib);

	// skip over leading spaces or zeros
	while ( isWhitespaceChar( ca ) \|\| ca =='0' ) {
	if (ca == '0') {
	nza++;
	} else {
	// only count consecutive zeroes
	nza = 0;
	}

	ca = a.charAt(++ia);
	}

	while ( isWhitespaceChar( cb ) \|\| cb == '0') {
	if (cb == '0') {
	nzb++;
	} else {
	// only count consecutive zeroes
	nzb = 0;
	}

	cb = b.charAt(++ib);
	}

	// process run of digits
	if (isDigitChar(ca) && isDigitChar(cb)) {
	if ((result = compareRight(a.substring(ia), b.substring(ib))) != 0) {
	return result;
	}
	}

	if (ca == 0 && cb == 0) {
	// The strings compare the same. Perhaps the caller
	// will want to call strcmp to break the tie.
	return nza - nzb;
	}

	if (ca < cb) {
	return -1;
	} else if (ca > cb) {
	return +1;
	}

	++ia; ++ib;
	}
	}
	}());
	</script>
	</head>
	<body>
	<script>
	function updateCmp() {
	setTimeout(function() {
	var a = document.natcomparecheck.val1.value;
	var b = document.natcomparecheck.val2.value;
	var cmpresult = document.getElementById('cmpresult');
	if (cmpresult)
	cmpresult.innerHTML = natcompare(a, b);
	}, 1);
	}
	</script>
	<form name="natcomparecheck">
	natcompare(
	<input name="val1" value="10705970246197248" onchange="updateCmp()" onkeypress="updateCmp()" onkeydown="updateCmp()">
	,
	<input name="val2" value="9999625058521088" onchange="updateCmp()" onkeypress="updateCmp()" onkeydown="updateCmp()">
	) =
	<span id="cmpresult"></span>
	</form>
	<script>
	updateCmp();
	</script>
	</body>
	</html>