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//*************************************************************
//
// Debugging functions
//
// Microsoft Confidential
// Copyright (c) Microsoft Corporation 1995
// All rights reserved
//
//*************************************************************
#include "uenv.h"
#if DBG
//
// Global Variable containing the debugging level.
//
DWORD dwDebugLevel;
//
// Debug strings
//
const TCHAR c_szUserEnv[] = TEXT("USERENV: ");
const TCHAR c_szCRLF[] = TEXT("\r\n");
//
// Registry debug information
//
#define DEBUG_REG_LOCATION TEXT("Software\\Microsoft\\Windows NT\\CurrentVersion\\winlogon")
#define DEBUG_KEY_NAME TEXT("UserEnvDebugLevel")
//*************************************************************
//
// InitDebugSupport()
//
// Purpose: Sets the debugging level.
// Also checks the registry for a debugging level.
//
// Parameters: None
//
// Return: void
//
// Comments:
//
//
// History: Date Author Comment
// 5/25/95 ericflo Created
//
//*************************************************************
void InitDebugSupport(void)
{
LONG lResult;
HKEY hKey;
DWORD dwType, dwSize;
//
// Initialize the debug level to normal
//
dwDebugLevel = DL_NORMAL;
//
// Check the registry
//
lResult = RegOpenKey (HKEY_LOCAL_MACHINE, DEBUG_REG_LOCATION,
&hKey);
if (lResult == ERROR_SUCCESS) {
dwSize = sizeof(dwDebugLevel);
RegQueryValueEx(hKey, DEBUG_KEY_NAME, NULL, &dwType,
(LPBYTE)&dwDebugLevel, &dwSize);
RegCloseKey(hKey);
}
}
//*************************************************************
//
// DebugMsg()
//
// Purpose: Displays debug messages based on the debug level
// and type of debug message.
//
// Parameters: mask - debug message type
// pszMsg - debug message
// ... - variable number of parameters
//
// Return: void
//
//
// Comments:
//
//
// History: Date Author Comment
// 5/25/95 ericflo Created
//
//*************************************************************
void _DebugMsg(UINT mask, LPCTSTR pszMsg, ...)
{
BOOL bOutput;
TCHAR szDebugBuffer[2*MAX_PATH+40];
va_list marker;
DWORD dwErrCode;
//
// Save the last error code (so the debug output doesn't change it).
//
dwErrCode = GetLastError();
//
// Detemerine the correct amount of debug output
//
switch (LOWORD(dwDebugLevel)) {
case DL_VERBOSE:
bOutput = TRUE;
break;
case DL_NORMAL:
//
// Normal debug output. Don't
// display verbose stuff, but
// do display warnings/asserts.
//
if (mask != DM_VERBOSE) {
bOutput = TRUE;
} else {
bOutput = FALSE;
}
break;
case DL_NONE:
default:
//
// Only display asserts
//
if (mask == DM_ASSERT) {
bOutput = TRUE;
} else {
bOutput = FALSE;
}
break;
}
//
// Display the error message if appropriate
//
if (bOutput) {
va_start(marker, pszMsg);
wvsprintf(szDebugBuffer, pszMsg, marker);
OutputDebugString(c_szUserEnv);
OutputDebugString(szDebugBuffer);
OutputDebugString(c_szCRLF);
va_end(marker);
if (dwDebugLevel & DL_LOGFILE) {
HANDLE hFile;
DWORD dwBytesWritten;
hFile = CreateFile(TEXT("c:\\userenv.log"),
GENERIC_WRITE,
FILE_SHARE_READ,
NULL,
OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hFile != INVALID_HANDLE_VALUE) {
if (SetFilePointer (hFile, 0, NULL, FILE_END) != 0xFFFFFFFF) {
WriteFile (hFile, (LPCVOID) szDebugBuffer,
lstrlen (szDebugBuffer) * sizeof(TCHAR),
&dwBytesWritten,
NULL);
WriteFile (hFile, (LPCVOID) c_szCRLF,
lstrlen (c_szCRLF) * sizeof(TCHAR),
&dwBytesWritten,
NULL);
}
CloseHandle (hFile);
}
}
}
//
// Restore the last error code
//
SetLastError(dwErrCode);
//
// Break to the debugger if appropriate
//
if (mask == DM_ASSERT) {
DebugBreak();
}
}
#endif // DBG
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