BOOL ListPorts(LISTPORTS_CALLBACK lpCbk,LPVOID lpCbkValue)
{
OSVERSIONINFO osvinfo;
/* check parameters */
if(!lpCbk){
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* determine which platform we're running on and forward
* to the appropriate routine
*/
ZeroMemory(&osvinfo,sizeof(osvinfo));
osvinfo.dwOSVersionInfoSize=sizeof(osvinfo);
GetVersionEx(&osvinfo);
switch(osvinfo.dwPlatformId){
case VER_PLATFORM_WIN32_WINDOWS:
return Win9xListPorts(lpCbk,lpCbkValue);
break;
case VER_PLATFORM_WIN32_NT:
return WinNT40ListPorts(lpCbk,lpCbkValue);
break;
default:
SetLastError(ERROR_OLD_WIN_VERSION);
return FALSE;
break;
}
}
void CEnumSerial::EnumSerialPorts(CArray<SSerInfo,SSerInfo&> &asi, BOOL bIgnoreBusyPorts)
{
// Clear the output array
asi.RemoveAll();
// Use different techniques to enumerate the available serial
// ports, depending on the OS we're using
OSVERSIONINFO vi;
vi.dwOSVersionInfoSize = sizeof(vi);
if (!GetVersionEx(&vi))
{
CString str;
str.Format(_T("Could not get OS version. (err=%lx)"), GetLastError());
throw str;
}
// Handle windows 9x and NT4 specially
if (vi.dwMajorVersion < 5)
{
if (vi.dwPlatformId == VER_PLATFORM_WIN32_NT)
EnumPortsWNt4(asi);
else
Win9xListPorts(asi);
}
else
{
// Win2k and later support a standard API for
// enumerating hardware devices.
EnumPortsWdm(asi);
}
for (int ii=0; ii<asi.GetSize(); ii++)
{
SSerInfo& rsi = asi[ii];
if (bIgnoreBusyPorts)
{
// Only display ports that can be opened for read/write
HANDLE hCom;
hCom = CreateFile(rsi.strDevPath, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, 0, NULL);
if (hCom == INVALID_HANDLE_VALUE)
{
// It can't be opened; remove it.
asi.RemoveAt(ii);
ii--;
continue;
}
else
{
// It can be opened! Close it and add it to the list
CloseHandle(hCom);
}
}
// Come up with a name for the device.
// If there is no friendly name, use the port name.
if (rsi.strFriendlyName.IsEmpty())
rsi.strFriendlyName = rsi.strPortName;
// If there is no description, try to make one up from
// the friendly name.
if (rsi.strPortDesc.IsEmpty())
{
// If the port name is of the form "ACME Port (COM3)"
// then strip off the " (COM3)"
rsi.strPortDesc = rsi.strFriendlyName;
int startdex = rsi.strPortDesc.Find(_T(" ("));
int enddex = rsi.strPortDesc.Find(_T(")"));
if ( (startdex > 0) && (enddex == (rsi.strPortDesc.GetLength()-1)))
rsi.strPortDesc = rsi.strPortDesc.Left(startdex);
}
}
}
