/* string.js    String-Bibliothek                           www.swanja.de, 28.01.2002
   ==========   =================
*/

String.prototype.isNumber = _isNumber;
String.prototype.isDigit  = _isDigit;
String.prototype.rmCharL  = _rmCharL;
String.prototype.rmCharR  = _rmCharR;
String.prototype.toLeft   = _toLeft;
String.prototype.toRight  = _toRight;
String.prototype.trim     = _trim;
String.prototype.cutStr   = _cutStr;

function _isNumber()  {
  var zahl = parseInt(this);
  if ( isNaN(zahl) ) return false;
  return true;
}

function _isDigit()  {
  for(var i=0; i < this.length; i++)
    if ( this.charAt(i) < "0" || this.charAt(i) > "9")
      return false;
  return true;
}

function _rmCharL(ch)  {
  var str = this;
  while (str.charAt(0) == ch)
    str = str.substring(1,str.length);
  return str;
}

function _rmCharR(ch)  {
  var str = this;  // sonst FehlerMsg: Zuweisung an this nicht mögl.
  while (str.charAt(str.length - 1) == ch)
    str = str.substring(0,str.length - 1);
  return str;
}

function _toLeft(anz,ch)  {
  if ( ! ch ) ch = " ";
  var str = this;
  for(var i=str.length; i < anz; i++)
    str += ch;
  return str;
}

function _toRight(anz,ch)  {
  if ( ! ch ) ch = " ";
  var tmp="", str = this;
  for(var i=str.length; i < anz; i++)
    tmp += ch;
  return (tmp + str);
}

function _trim(ch)  {
  if ( ! ch ) ch = ' ';
  var str = this.rmCharR(ch);
  return     str.rmCharL(ch);
}

function _cutStr(str,pos)  {
  if ( ! pos ) pos = 0;
  if ( this.indexOf(str) >= pos )
    return this.substring(0,this.indexOf(str));
  return this;
}

/* !! geht so nicht: !!
function _rmCharR(ch)  {
  while (this.charAt(this.length - 1) == ch)
    this = this.substring(0,this.length - 1);    // FehlerMsg: Zuweisung an this nicht mögl.
  return this;
}
*/

function strCompareNotCaseSensitiv(str1, str2)  {
  var _str1 = str1.toLowerCase();                      // "str1" anstatt "_str1": Fehler !?
  var _str2 = str2.toLowerCase();
  return strCompare(_str1,_str2);
}

function strCompare(str1, str2)  {
//  if ( strIsDigit(str1) && strIsDigit(str2) )                    // beide ZahlenString
//if ( strIsNumber(str1) && strIsNumber(str2) )                    // beide ZahlenString
  if ( str1.isNumber() && str2.isNumber() )                    // beide ZahlenString
    return (parseInt(str1) - parseInt(str2));

  for(var i=0; i < str1.length && i < str2.length; i++) {
    var diff = str1.charCodeAt(i) - str2.charCodeAt(i);
    if ( diff != 0 )
      return diff;
  }
  return 0;
}




































































































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