function [x,y,typ]=RAND_f(job,arg1,arg2)
// Copyright INRIA
x=[];y=[];typ=[];
select job
case 'plot' then //normal  position
  standard_draw(arg1)
case 'getinputs' then
  [x,y,typ]=standard_inputs(arg1)
case 'getoutputs' then
  [x,y,typ]=standard_outputs(arg1)
case 'getorigin' then
  [x,y]=standard_origin(arg1)
case 'set' then
  x=arg1;
  graphics=arg1.graphics;exprs=graphics.exprs
  model=arg1.model;
  if size(exprs,'*')==5 then exprs=exprs(1:3),end //compatibility
  if size(exprs,'*')==3 then exprs=[exprs;string(model.dstate(1))],end //compatibility
  while %t do
    [ok,flag,a,b,seed_c,exprs]=getvalue([
	'Set Random generator block parameters';
	'flag = 0 : Uniform distribution A is min and A+B max';
	'flag = 1 : Normal distribution A is mean and B deviation';
	' ';
	'A and B must be vector with equal sizes';
	'seed is the seed of random number generator (integer<2**31)'],..
	['flag';'A';'B';'seed'],..
	list('vec',1,'vec',-1,'vec','size(%2,''*'')','vec',1),exprs)
    if ~ok then break,end
    if flag<>0&flag<>1 then
      message('flag must be equal to 1 or 0')
    else
      nout=size(a,'*')
      graphics.exprs=exprs
      model.out=nout
      model.ipar=flag
      model.rpar=[a(:);b(:)]
      model.dstate=[seed_c;0*a(:)]
      x.graphics=graphics;x.model=model
      break
    end
  end
case 'define' then
  a=0
  b=1
  dt=0
  out=1
  flag=0
  model=scicos_model()
  model.sim='rndblk'
  model.out=out
  model.evtin=1
  model.dstate=[int(rand()*(10^7-1));0*a(:)]
  model.rpar=[a(:);b(:)]
  model.ipar=flag
  model.blocktype='d'
  model.dep_ut=[%f %f]

  exprs=[string(flag);sci2exp(a(:));sci2exp(b(:));string(model.dstate(1))]
  gr_i=['txt=[''random'';''generator''];';
    'xstringb(orig(1),orig(2),txt,sz(1),sz(2),''fill'')']
  x=standard_define([3 2],model,exprs,gr_i)
end
endfunction
