/******************************************************************
* does_port_exist (internal)
*
* returns TRUE, when the Port already exists
*
*/
static BOOL does_port_exist(LPCWSTR myname)
{
LPPORT_INFO_1W pi;
DWORD needed = 0;
DWORD returned;
DWORD id;
TRACE("(%s)\n", debugstr_w(myname));
id = EnumPortsW(NULL, 1, NULL, 0, &needed, &returned);
pi = heap_alloc(needed);
returned = 0;
if (pi)
id = EnumPortsW(NULL, 1, (LPBYTE) pi, needed, &needed, &returned);
if (id && returned > 0) {
/* we got a number of valid names. */
for (id = 0; id < returned; id++)
{
if (lstrcmpiW(myname, pi[id].pName) == 0) {
TRACE("(%u) found %s\n", id, debugstr_w(pi[id].pName));
heap_free(pi);
return TRUE;
}
}
}
heap_free(pi);
return FALSE;
}
/* PortExists
*
* Calls EnumPorts to check whether the port name already exists.
* This asks every monitor, rather than just this one.
* The function will return TRUE if the specified port is in the list.
* If an error occurs, the return is FALSE and the variable pointed
* to by pError contains the return from GetLastError().
* The caller must therefore always check that *pError == NO_ERROR.
*/
BOOL
PortExists(
_In_opt_ LPWSTR pName,
_In_ LPWSTR pPortName,
_Out_ PDWORD pError
)
{
DWORD cbNeeded = 0;
DWORD cReturned = 0;
DWORD cbPorts = 0;
LPPORT_INFO_1 pPorts = NULL;
DWORD i = 0;
BOOL Found = TRUE;
*pError = NO_ERROR;
if (!EnumPortsW(pName, 1, NULL, 0, &cbNeeded, &cReturned))
{
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
{
cbPorts = cbNeeded;
pPorts = (LPPORT_INFO_1)AllocSplMem(cbPorts);
if (pPorts)
{
if (EnumPortsW(pName, 1, (LPBYTE)pPorts, cbPorts, &cbNeeded, &cReturned))
{
Found = FALSE;
for (i = 0; i < cReturned; i++)
{
if (!lstrcmpi(pPorts[i].pName, pPortName))
{
Found = TRUE;
break;
}
}
}
}
FreeSplMem(pPorts);
}
}
else
{
Found = FALSE;
}
return Found;
}
