Moving client from the keyboard

The following allows to move a floating client or a client in a floating layout:
- of 5px in any direction with modkey and the keypad numbers.
- to the screen's working area border with modkey + ctrl and the keypad numbers.

k_m = { modkey }
k_ms = { modkey , "Shift"}

function floats(c)
  local ret = false
  local l = awful.layout.get(c.screen)
  if awful.layout.getname(l) == 'floating' or awful.client.floating.get(c) then
    ret = true
  end
  return ret
end

and in clientkeys:

-- move floating windows
    awful.key(k_m, "KP_End", function(c)
      if floats(c) then
        local g = c:geometry()
        g.x = g.x - 5
        g.y = g.y + 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_m, "KP_Down", function(c)
      if floats(c) then
        local g = c:geometry()
        g.y = g.y + 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_m, "KP_Next", function(c)
      if floats(c) then
        local g = c:geometry()
        g.x = g.x + 5
        g.y = g.y + 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_m, "KP_Left", function(c)
      if floats(c) then
        local g = c:geometry()
        g.x = g.x - 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_m, "KP_Right", function(c)
      if floats(c) then
        local g = c:geometry()
        g.x = g.x + 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_m, "KP_Home", function(c)
      if floats(c) then
        local g = c:geometry()
        g.x = g.x - 5
        g.y = g.y - 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_m, "KP_Up", function(c)
      if floats(c) then
        local g = c:geometry()
        g.y = g.y - 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_m, "KP_Prior", function(c)
      if floats(c) then
        local g = c:geometry()
        g.x = g.x + 5
        g.y = g.y - 5
        c:geometry(g)
        mouse_warp(c)
      end
    end),

    -- move floating windows to screen edges
    awful.key(k_ms, "KP_End", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = 0 + w.x
        g.y = w.height - g.height + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Down", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = (w.width - g.width)/2 + w.x
        g.y = w.height - g.height + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Next", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = w.width - g.width + w.x
        g.y = w.height - g.height + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Left", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = 0 + w.x
        g.y = (w.height - g.height)/2 + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Begin", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = (w.width - g.width)/2 + w.x
        g.y = (w.height - g.height)/2 + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Right", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = w.width - g.width + w.x
        g.y = (w.height - g.height)/2 + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Home", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = 0 + w.x
        g.y = 0 + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Up", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = (w.width - g.width)/2 + w.x
        g.y = 0 + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),
    awful.key(k_ms, "KP_Prior", function(c)
      if floats(c) then
        local g = c:geometry()
        local w = screen[c.screen].workarea
        g.x = w.width - g.width + w.x
        g.y = 0 + w.y
        c:geometry(g)
        mouse_warp(c)
      end
    end),