int iUnknown0 = 0;

while ( flNextPrimaryAttack <= g_pGlobals->curtime + flRate )
{
    flNextPrimaryAttack = ( flNextPrimaryAttack + flRate );
    
    iUnknown0++;
}

if ( iUnknown0 > iClip )
{
    iUnknown0 = iClip;
    iClip -= iUnknown0;
}

if ( iUnknown0 <= g_pGlobals->interval_per_tick )
{
    bCanPistol = true;
}