204 lines
4.6 KiB
C
204 lines
4.6 KiB
C
/*** nt.c - NT specific functions
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*
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* Copyright (c) 1996,1997 Microsoft Corporation
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* Author: Michael Tsang (MikeTs)
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* Created: 11/03/97
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*
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* MODIFICATION HISTORY
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*/
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#ifdef ___UNASM
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#pragma warning (disable: 4201 4214 4514)
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typedef unsigned __int64 ULONGLONG;
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#define LOCAL __cdecl
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#define EXPORT __cdecl
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#include <stdarg.h>
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#ifndef WINNT
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#define _X86_
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#endif
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#include <windef.h>
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#include <winbase.h>
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#include <winreg.h>
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#define EXCL_BASEDEF
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#include "aslp.h"
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/***LP IsWinNT - check if OS is NT
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*
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* ENTRY
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* None
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*
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* EXIT-SUCCESS
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* returns TRUE - OS is NT
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* EXIT-FAILURE
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* returns FALSE - OS is not NT
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*/
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BOOL LOCAL IsWinNT(VOID)
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{
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BOOL rc = FALSE;
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OSVERSIONINFO osinfo;
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ENTER((2, "IsWinNT()\n"));
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osinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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if (GetVersionEx(&osinfo) && (osinfo.dwPlatformId == VER_PLATFORM_WIN32_NT))
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{
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rc = TRUE;
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}
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EXIT((2, "IsWinNT=%x\n", rc));
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return rc;
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} //IsWinNT
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/***LP EnumSubKey - enumerate subkey
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*
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* ENTRY
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* hkey - key to enumerate
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* dwIndex - subkey index
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*
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* EXIT-SUCCESS
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* returns subkey
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* EXIT-FAILURE
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* returns NULL
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*/
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HKEY LOCAL EnumSubKey(HKEY hkey, DWORD dwIndex)
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{
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HKEY hkeySub = NULL;
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char szSubKey[32];
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DWORD dwSubKeySize = sizeof(szSubKey);
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ENTER((2, "EnumSubKey(hkey=%x,Index=%d)\n", hkey, dwIndex));
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if ((RegEnumKeyEx(hkey, dwIndex, szSubKey, &dwSubKeySize, NULL, NULL, NULL,
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NULL) == ERROR_SUCCESS) &&
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(RegOpenKeyEx(hkey, szSubKey, 0, KEY_READ, &hkeySub) != ERROR_SUCCESS))
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{
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hkeySub = NULL;
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}
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EXIT((2, "EnumSubKey=%x\n", hkeySub));
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return hkeySub;
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} //EnumSubKey
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/***LP OpenNTTable - Open ACPI table in NT registry
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*
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* ENTRY
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* pszTabSig -> table signature string
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*
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* EXIT-SUCCESS
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* returns table registry handle
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* EXIT-FAILURE
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* returns NULL
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*/
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HKEY LOCAL OpenNTTable(PSZ pszTabSig)
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{
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HKEY hkeyTab = NULL, hkey1 = NULL, hkey2 = NULL;
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static char szTabKey[] = "Hardware\\ACPI\\xxxx";
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ENTER((2, "OpenNTTable(TabSig=%s)\n", pszTabSig));
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lstrcpyn(&szTabKey[lstrlen(szTabKey) - 4], pszTabSig, 5);
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if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, szTabKey, 0, KEY_READ, &hkey1) ==
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ERROR_SUCCESS)
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{
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//
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// hkey1 is now "Hardware\ACPI\<TabSig>"
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//
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if ((hkey2 = EnumSubKey(hkey1, 0)) != NULL)
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{
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//
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// hkey2 is now "Hardware\ACPI\<TabSig>\<OEMID>"
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//
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RegCloseKey(hkey1);
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if ((hkey1 = EnumSubKey(hkey2, 0)) != NULL)
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{
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//
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// hkey1 is now "Hardware\ACPI\<TabSig>\<OEMID>\<OEMTabID>"
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//
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RegCloseKey(hkey2);
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if ((hkey2 = EnumSubKey(hkey1, 0)) != NULL)
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{
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//
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// hkey2 is now
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// "Hardware\ACPI\<TabSig>\<OEMID>\<OEMTabID>\<OEMRev>"
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//
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hkeyTab = hkey2;
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}
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}
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}
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}
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if (hkey1 != NULL)
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{
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RegCloseKey(hkey1);
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}
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if ((hkey2 != NULL) && (hkeyTab != hkey2))
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{
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RegCloseKey(hkey2);
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}
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EXIT((2, "OpenNTTable=%x\n", hkeyTab));
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return hkeyTab;
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} //OpenNTTable
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/***LP GetNTTable - Get ACPI table from NT registry
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*
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* ENTRY
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* pszTabSig -> table signature string
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*
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* EXIT-SUCCESS
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* returns pointer to table
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* EXIT-FAILURE
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* returns NULL
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*/
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PBYTE LOCAL GetNTTable(PSZ pszTabSig)
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{
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PBYTE pb = NULL;
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HKEY hkeyTab;
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ENTER((2, "GetNTTable(TabSig=%s)\n", pszTabSig));
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if ((hkeyTab = OpenNTTable(pszTabSig)) != NULL)
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{
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DWORD dwLen = 0;
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PSZ pszTabKey = "00000000";
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if (RegQueryValueEx(hkeyTab, pszTabKey, NULL, NULL, NULL, &dwLen) ==
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ERROR_SUCCESS)
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{
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if ((pb = MEMALLOC(dwLen)) != NULL)
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{
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if (RegQueryValueEx(hkeyTab, pszTabKey, NULL, NULL, pb, &dwLen)
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!= ERROR_SUCCESS)
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{
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ERROR(("GetNTTable: failed to read table"));
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}
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}
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else
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{
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ERROR(("GetNTTable: failed to allocate table buffer"));
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}
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}
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else
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{
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ERROR(("GetNTTable: failed to read table key"));
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}
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RegCloseKey(hkeyTab);
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}
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else
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{
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ERROR(("GetNTTable: failed to get table %s", pszTabSig));
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}
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EXIT((2, "GetNTTable=%x\n", pb));
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return pb;
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} //GetNTTable
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#endif //ifdef __UNASM
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