Unit CharUtilsUnit;

// NewView - a new OS/2 Help Viewer
// Copyright 2006-2007 Ronald Brill (rbri at rbri dot de)
// This software is released under the GNU Public License - see readme.txt

// Helper functions to work with characters

Interface

uses
  Classes;

const
  CharTAB = chr(9);
  CharCR = chr(13);
  CharLF = chr(10);


  TYPE
    TSetOfChars = set of char;

  // Returns true if aChar is a digit 0..9
  Function CharIsDigit(const aChar : char) : boolean;

  // Returns true if aChar is an alphabetic character a..z A..Z
  Function CharIsAlpha(const aChar : char) : boolean;

Implementation

  uses
    SysUtils;

  Function CharIsDigit(const aChar : char) : boolean;
  begin
    Result := (aChar >= '0') and (aChar <= '9');
  end;

  Function CharIsAlpha(const aChar : char) : boolean;
  begin
    Result := ( (aChar >= 'A') and (aChar <= 'Z') ) or ((aChar >= 'a') and (aChar <= 'z'));
  end;


END.