function CommonFun.calcBuff_7901(srcUser, targetUser, a, b, c, d, lv)
  if srcUser == nil or targetUser == nil then
    return 0
  end
  local Num = srcUser:GetBuffLayer(a)
  local Num2 = b
  local A = Num - Num2
  if srcUser:HasBuffID(90004744_HOLY_GLORIOUS_PUNCH_1_T5_:MAX_STACK_0) and 1 < Num then
    A = 1
  end
  return A
end