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/**************************************************************************\
* Module Name: ntreg.cpp** CRegistrySettings class** This class handles getting registry information for display driver* information.** Copyright (c) Microsoft Corp. 1992-1998 All Rights Reserved*\**************************************************************************/
#include "precomp.h"
#include <tchar.h>
#include "ntreg.hxx"
#include <devguid.h>
#ifdef WINNT
//
// CRegistrySettings constructor
//
CRegistrySettings::CRegistrySettings(LPTSTR pstrDeviceKey) : _hkVideoReg(NULL) , _pszDrvName(NULL) , _pszKeyName(NULL) , _pszDeviceInstanceId(NULL){ TCHAR szBuffer[MAX_PATH]; LPTSTR pszPath; HKEY hkeyCommon, hkeyDriver; DWORD cb; LPTSTR pszName = NULL; LPTSTR pszEnd;
ASSERT(lstrlen(pstrDeviceKey) < MAX_PATH); //
// Copy the data to local buffer.
//
lstrcpy(szBuffer, pstrDeviceKey);
//
// Initialize the device instance id
//
InitDeviceInstanceID(szBuffer);
//
// At this point, szBuffer has something like:
// \REGISTRY\Machine\System\ControlSet001\...
//
// To use the Win32 registry calls, we have to strip off the \REGISTRY
// and convert \Machine to HKEY_LOCAL_MACHINE
//
pszPath = SubStrEnd(SZ_REGISTRYMACHINE, szBuffer);
//
// Try to open the registry key
//
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, pszPath, 0, KEY_READ, &_hkVideoReg) != ERROR_SUCCESS) {
_hkVideoReg = 0; }
//
// Go to the video subkey
//
pszEnd = pszPath + lstrlen(pszPath);
while (pszEnd != pszPath && *pszEnd != TEXT('\\')) {
pszEnd--; }
*pszEnd = UNICODE_NULL;
lstrcat(pszPath, SZ_COMMON_SUBKEY);
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, pszPath, 0, KEY_READ, &hkeyCommon) == ERROR_SUCCESS) {
cb = sizeof(szBuffer); ZeroMemory(szBuffer, cb);
if (RegQueryValueEx(hkeyCommon, SZ_SERVICE, NULL, NULL, (LPBYTE)szBuffer, &cb) == ERROR_SUCCESS) {
//
// Save the key name
//
_pszKeyName = (LPTSTR)LocalAlloc(LPTR, (lstrlen(szBuffer) + 1) * sizeof(TCHAR));
if (_pszKeyName != NULL) {
lstrcpy(_pszKeyName, szBuffer); lstrcpy(szBuffer, SZ_SERVICES_PATH); lstrcat(szBuffer, _pszKeyName);
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, szBuffer, 0, KEY_READ, &hkeyDriver) == ERROR_SUCCESS) { cb = sizeof(szBuffer); ZeroMemory(szBuffer, cb);
if (RegQueryValueEx(hkeyDriver, L"ImagePath", NULL, NULL, (LPBYTE)szBuffer, &cb) == ERROR_SUCCESS) { //
// This is a binary.
// Extract the name, which will be of the form ...\driver.sys
//
LPTSTR pszDriver, pszDriverEnd; pszDriver = szBuffer; pszDriverEnd = pszDriver + lstrlen(pszDriver); while(pszDriverEnd != pszDriver && *pszDriverEnd != TEXT('.')) { pszDriverEnd--; } *pszDriverEnd = UNICODE_NULL; while(pszDriverEnd != pszDriver && *pszDriverEnd != TEXT('\\')) { pszDriverEnd--; } //
// If pszDriver and pszDriverEnd are different, we now
// have the driver name.
//
if (pszDriverEnd > pszDriver) { pszDriverEnd++; pszName = pszDriverEnd; } } RegCloseKey(hkeyDriver); } if (!pszName) {
//
// Something failed trying to get the binary name.just get the device name
//
_pszDrvName = _pszKeyName;
} else {
_pszDrvName = (LPTSTR)LocalAlloc(LPTR, (lstrlen(pszName) + 1) * sizeof(TCHAR));
if (_pszDrvName != NULL) {
lstrcpy(_pszDrvName, pszName);
} } } }
RegCloseKey(hkeyCommon); }}
//
// CRegistrySettings destructor
//
CRegistrySettings::~CRegistrySettings() { //
// Close the registry
//
if (_hkVideoReg) { RegCloseKey(_hkVideoReg); }
//
// Free the strings
//
if (_pszKeyName) { LocalFree(_pszKeyName); }
if ((_pszKeyName != _pszDrvName) && _pszDrvName) { LocalFree(_pszDrvName); }
if(_pszDeviceInstanceId) { LocalFree(_pszDeviceInstanceId); }}
//
// Method to get the hardware information fields.
//
VOIDCRegistrySettings::GetHardwareInformation( PDISPLAY_REGISTRY_HARDWARE_INFO pInfo){
DWORD cb, dwType; DWORD i; LONG lRet;
LPWSTR pKeyNames[5] = { L"HardwareInformation.MemorySize", L"HardwareInformation.ChipType", L"HardwareInformation.DacType", L"HardwareInformation.AdapterString", L"HardwareInformation.BiosString" };
ZeroMemory(pInfo, sizeof(DISPLAY_REGISTRY_HARDWARE_INFO));
//
// Query each entry one after the other.
//
for (i = 0; i < 5; i++) {
//
// query the size of the string
//
cb = 256; lRet = RegQueryValueExW(_hkVideoReg, pKeyNames[i], NULL, &dwType, NULL, &cb);
if (lRet == ERROR_SUCCESS) {
if (i == 0) {
ULONG mem;
cb = 4;
RegQueryValueExW(_hkVideoReg, pKeyNames[i], NULL, &dwType, (PUCHAR) (&mem), &cb);
//
// If we queried the memory size, we actually have
// a DWORD. Transform the DWORD to a string
//
// Divide down to Ks
mem = mem >> 10;
// if a MB multiple, divide again.
if ((mem & 0x3FF) != 0) {
wsprintf((LPWSTR)pInfo, L"%d KB", mem );
} else {
wsprintf((LPWSTR)pInfo, L"%d MB", mem >> 10 );
}
} else {
cb = 256;
//
// get the string
//
RegQueryValueExW(_hkVideoReg, pKeyNames[i], NULL, &dwType, (LPBYTE) pInfo, &cb);
} } else { //
// Put in the default string
//
LoadString(hInstance, IDS_UNAVAILABLE, (LPWSTR)pInfo, 256); }
pInfo = (PDISPLAY_REGISTRY_HARDWARE_INFO)((PUCHAR)pInfo + 256); }
return;}
VOID CRegistrySettings::InitDeviceInstanceID( LPTSTR pstrDeviceKey ) { HDEVINFO hDevInfo = INVALID_HANDLE_VALUE ; SP_DEVINFO_DATA DevInfoData; ULONG InstanceIDSize = 0; BOOL bSuccess = FALSE; LPWSTR pwInterfaceName = NULL; LPWSTR pwInstanceID = NULL;
ASSERT (pstrDeviceKey != NULL); ASSERT (_pszDeviceInstanceId == NULL);
if (AllocAndReadInterfaceName(pstrDeviceKey, &pwInterfaceName)) {
bSuccess = GetDevInfoDataFromInterfaceName(pwInterfaceName, &hDevInfo, &DevInfoData); if (bSuccess) {
InstanceIDSize = 0;
bSuccess =
((CM_Get_Device_ID_Size(&InstanceIDSize, DevInfoData.DevInst, 0) == CR_SUCCESS) &&
((_pszDeviceInstanceId = (LPTSTR)LocalAlloc(LPTR, (InstanceIDSize + 1) * sizeof(TCHAR))) != NULL) &&
(CM_Get_Device_ID(DevInfoData.DevInst, _pszDeviceInstanceId, InstanceIDSize, 0) == CR_SUCCESS));
if (!bSuccess) {
//
// Clean-up
//
if (NULL != _pszDeviceInstanceId) { LocalFree(_pszDeviceInstanceId); _pszDeviceInstanceId = NULL; } }
SetupDiDestroyDeviceInfoList(hDevInfo); }
LocalFree(pwInterfaceName); }
if ((!bSuccess) && AllocAndReadInstanceID(pstrDeviceKey, &pwInstanceID)) {
#ifdef UNICODE
_pszDeviceInstanceId = pwInstanceID;#else
SIZE_T cch = wcslen(pwInstanceID) + 1; _pszDeviceInstanceId = LocalAlloc(LPTR, cch); if (_pszDeviceInstanceId != NULL) { WideCharToMultiByte(CP_ACP, 0, pwInstanceID, -1, _pszDeviceInstanceId, cch, NULL, NULL); }
LocalFree(pwInstanceID);#endif
}
} // InitDeviceInstanceID
BOOLCRegistrySettings::GetDevInfoDataFromInterfaceName( IN LPWSTR pwInterfaceName, OUT HDEVINFO* phDevInfo, OUT PSP_DEVINFO_DATA pDevInfoData )
/*
Note: If this function retuns success, the caller is responsible to destroy the device info list returned in phDevInfo
*/
{ LPWSTR pwDevicePath = NULL; HDEVINFO hDevInfo = INVALID_HANDLE_VALUE; SP_DEVINFO_DATA DevInfoData; SP_DEVICE_INTERFACE_DATA InterfaceData; PSP_DEVICE_INTERFACE_DETAIL_DATA pInterfaceDetailData = NULL; DWORD InterfaceIndex = 0; DWORD InterfaceSize = 0; BOOL bMatch = FALSE;
ASSERT (pwInterfaceName != NULL); ASSERT (phDevInfo != NULL); ASSERT (pDevInfoData != NULL);
//
// Enumerate all display adapter interfaces
//
hDevInfo = SetupDiGetClassDevs(&GUID_DISPLAY_ADAPTER_INTERFACE, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
if (hDevInfo == INVALID_HANDLE_VALUE) { goto Cleanup; }
InterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA); while (SetupDiEnumDeviceInterfaces(hDevInfo, NULL, &GUID_DISPLAY_ADAPTER_INTERFACE, InterfaceIndex, &InterfaceData)) {
//
// Get the required size for the interface
//
InterfaceSize = 0; SetupDiGetDeviceInterfaceDetail(hDevInfo, &InterfaceData, NULL, 0, &InterfaceSize, NULL);
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) { goto Cleanup; }
//
// Alloc memory for the interface
//
pInterfaceDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA) LocalAlloc(LPTR, InterfaceSize); if (pInterfaceDetailData == NULL) goto Cleanup;
//
// Get the interface
//
pInterfaceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA); DevInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
if (SetupDiGetDeviceInterfaceDetail(hDevInfo, &InterfaceData, pInterfaceDetailData, InterfaceSize, &InterfaceSize, &DevInfoData)) {
//
// Is the InterfaceName the same as the DevicePath?
//
#ifdef UNICODE
pwDevicePath = pInterfaceDetailData->DevicePath;#else
{ SIZE_T cch = strlen(pInterfaceDetailData->DevicePath) + 1; pwDevicePath = LocalAlloc(LPTR, cch * sizeof(WCHAR)); if (pwDevicePath == NULL) { goto Cleanup; } MultiByteToWideChar(CP_ACP, 0, pInterfaceDetailData->DevicePath, -1, pwDevicePath, cch); }#endif
//
// The first 4 characters of the interface name are different
// between user mode and kernel mode (e.g. "\\?\" vs "\\.\")
// Therefore, ignore them.
//
bMatch = (_wcsnicmp(pwInterfaceName + 4, pwDevicePath + 4, wcslen(pwInterfaceName + 4)) == 0);
#ifndef UNICODE
LocalFree(pwDevicePath); pwDevicePath = NULL;#endif
if (bMatch) {
//
// We found the device
//
*phDevInfo = hDevInfo; CopyMemory(pDevInfoData, &DevInfoData, sizeof(SP_DEVINFO_DATA));
break; } }
//
// Clean-up
//
LocalFree(pInterfaceDetailData); pInterfaceDetailData = NULL;
//
// Next interface ...
//
InterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA); ++InterfaceIndex; }
Cleanup:
if (pInterfaceDetailData != NULL) { LocalFree(pInterfaceDetailData); }
//
// Upon success, the caller is responsible to destroy the list
//
if (!bMatch && (hDevInfo != INVALID_HANDLE_VALUE)) { SetupDiDestroyDeviceInfoList(hDevInfo); }
return bMatch;}
#endif // WINNT
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