# V1037\. Two or more case\-branches perform the same actions\.

The analyzer has detected that multiple case clauses of the switch statement contain the same code\. It may often indicate redundant code and can be improved by merging the labels\. Identical code fragments may also be copy\-pasting errors\.

The example of a redundant code:

```cpp
switch (wParam)
{
case WM_MOUSEMOVE:
  ::PostMessage(hWndServer, wParam, 0, 0);
  break;
case WM_NCMOUSEMOVE:
  ::PostMessage(hWndServer, wParam, 0, 0);
  break;
....
default:
  break
}
```

Different mouse events may trigger the same actions, so the code can be simplified:

```cpp
switch (wParam)
{
case WM_MOUSEMOVE:
case WM_NCMOUSEMOVE:
  ::PostMessage(hWndServer, wParam, 0, 0);
  break;
....
default:
  break
}
```

The next example, taken from a real application, demonstrates faulty behavior resulting from a typo:

```cpp
GLOBAL(void)
jpeg_default_colorspace (j_compress_ptr cinfo)
{
  switch (cinfo->in_color_space) {
  case JCS_GRAYSCALE:
    jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
    break;
  case JCS_RGB:
    jpeg_set_colorspace(cinfo, JCS_YCbCr);
    break;
  case JCS_YCbCr:
    jpeg_set_colorspace(cinfo, JCS_YCbCr);
    break;
  ....
  }
  ....
}
```

The `JCS_RGB` label contains a typo: `JCS_RGB` should be passed to the function instead of `JCS_YCbCr`\.

The fixed code:

```cpp
GLOBAL(void)
jpeg_default_colorspace (j_compress_ptr cinfo)
{
  switch (cinfo->in_color_space) {
  case JCS_GRAYSCALE:
    jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
    break;
  case JCS_RGB:
    jpeg_set_colorspace(cinfo, JCS_RGB);
    break;
  case JCS_YCbCr:
    jpeg_set_colorspace(cinfo, JCS_YCbCr);
    break;
  ....
  }
  ....
}
```