ftp.nice.ch/pub/next/unix/audio/Cmix.N.s.tar.gz#/cmix/lib/randf.c

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float randf(oldval,factor)
     float *oldval, factor;
{
      float ccrandom(),range, xlowb, upb, temp;
      range = 2.0 - (2.0 * factor);
      xlowb = *oldval - range;
      if(xlowb < -1.) xlowb = -1; 
      upb = *oldval+range;
      if(upb > 1) upb = 1;  
      temp = xlowb+(upb-xlowb)*((ccrandom(*oldval)+1)*.5);
      *oldval=temp;
      return (temp); 
}
float ccrandom(x)
float x;
{
	int n;
	n=x*1048576.;
	return((float)((1061*n+221589) % 1048576)/1048576.);
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.