{********************************************************}
{                                                        }
{   Olive BBS                                            }
{                                                        }
{   Copyleft (ↄ) 2020 Olive BBS                          }
{                                                        }
{   This file is part of Olive BBS                       }
{                                                        }
{   Olive BBS is free software: you can redistribute it  }
{   and/or modify it under the terms of the GNU General  }
{   Public License as published by the Free Software     }
{   Foundation, either version 3 of the License, or      }
{   (at your option) any later version.                  }
{                                                        }
{   Olive BBS is distributed in the hope that it will    }
{   be useful, but WITHOUT ANY WARRANTY; without even    }
{   the implied warranty of MERCHANTABILITY or FITNESS   }
{   FOR A PARTICULAR PURPOSE.  See the GNU General       }
{   Public License for more details.                     }
{                                                        }
{   You should have received a copy of the GNU General   }
{   Public License along with Olive BBS.  If not, see    }
{   <http://www.gnu.org/licenses/>.                      }
{                                                        }
{********************************************************}
{        ___                   ___    ___                }
{       (   ).-.              (   )  (   )               }
{   .--. | |( __)___  ___ .--. | |.-. | |.-.     .--.    }
{  /    \| |(''"(   )(   /    \| /   \| /   \  /  _  \   }
{ |  .-. | | | | | |  | |  .-. |  .-. |  .-. |. .' `. ;  }
{ | |  | | | | | | |  | |  | | | |  | | |  | || '   | |  }
{ | |  | | | | | | |  | |  |/  | |  | | |  | |_\_`.(___) }
{ | |  | | | | | | |  | |  ' _.| |  | | |  | (   ). '.   }
{ | '  | | | | | ' '  ; |  .'.-| '  | | '  | || |  `\ |  }
{ '  `-' | | | |  \ `' /'  `-' ' `-' ;' `-' ; ; '._,' '  }
{  `.__.(___(___)  '_.'  `.__.' `.__.  `.__.   '.___.'   }
{                                                        }
{********************************************************}

{$mode objfpc}{$H+}
{$interfaces corba}
Unit Olive.Random;

interface

uses
  Objects, Classes, SysUtils,
  Olive.Random.RandomInterface,
{$IF DEFINED(LINUX)}
  Olive.Random.Linux
{$ELSEIF DEFINED(WINDOWS)}
  Olive.Random.Windows
{$ELSEIF DEFINED(BSD)}
  Olive.Random.BSD
{$ELSE}
  Olive.Random.Generic;
{$ENDIF}
 ;

type
  PRandom = ^TRandom;
  TRandom = class (RandomTrait, RandomInterface)
    private
      FRandomGenerator :  RandomInterface;
      procedure SetRandomGenerator(GeneratorClass : RandomInterface);
    public
      constructor Init;
      destructor Destroy; override;
      procedure SetDefaultGenerator;
      function GetBytes(NBytes : SizeUInt) : TBytes;
      function GetString(NBytes : SizeUInt) : AnsiString;
      property RandomGenerator : RandomInterface read FRandomGenerator write SetRandomGenerator;
  end;

implementation


constructor TRandom.Init;
begin
  SetDefaultGenerator;
end;

destructor TRandom.Destroy;
begin
  inherited Destroy;
end;

procedure TRandom.SetRandomGenerator(GeneratorClass : RandomInterface);
begin
  FRandomGenerator := GeneratorClass;
end;

procedure TRandom.SetDefaultGenerator;
begin
  {$IF DEFINED(LINUX)}
    FRandomGenerator := LinuxRandom.Create;
  {$ELSEIF DEFINED(WINDOWS)}
    FRandomGenerator := WindowsRandom.Create;
  {$ELSEIF DEFINED(BSD)}
    FRandomGenerator := BSDRandom.Create;
  {$ELSE}
    FRandomGenerator := RandomGeneric.Create;
  {$ENDIF}
end;

function TRandom.GetBytes(NBytes : SizeUInt) : TBytes;
begin
  SetLength(Result, NBytes);
  Result := FRandomGenerator.GetBytes(NBytes);
end;
function TRandom.GetString(NBytes : SizeUInt) : AnsiString;
begin
  SetLength(Result, NBytes);
  Result := FRandomGenerator.GetString(NBytes);

end;

end.