1 files changed, 942 insertions, 0 deletions

diff --git a/src/dutil/logutil.cpp b/src/dutil/logutil.cpp
new file mode 100644
index 00000000..c471e002
--- /dev/null
+++ b/src/dutil/logutil.cpp
@@ -0,0 +1,942 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+// globals
+static HMODULE LogUtil_hModule = NULL;
+static BOOL LogUtil_fDisabled = FALSE;
+static HANDLE LogUtil_hLog = INVALID_HANDLE_VALUE;
+static LPWSTR LogUtil_sczLogPath = NULL;
+static LPSTR LogUtil_sczPreInitBuffer = NULL;
+static REPORT_LEVEL LogUtil_rlCurrent = REPORT_STANDARD;
+static CRITICAL_SECTION LogUtil_csLog = { };
+static BOOL LogUtil_fInitializedCriticalSection = FALSE;
+
+// Customization of certain parts of the string, within a line
+static LPWSTR LogUtil_sczSpecialBeginLine = NULL;
+static LPWSTR LogUtil_sczSpecialEndLine = NULL;
+static LPWSTR LogUtil_sczSpecialAfterTimeStamp = NULL;
+
+static LPCSTR LOGUTIL_UNKNOWN = "unknown";
+static LPCSTR LOGUTIL_WARNING = "warning";
+static LPCSTR LOGUTIL_STANDARD = "standard";
+static LPCSTR LOGUTIL_VERBOSE = "verbose";
+static LPCSTR LOGUTIL_DEBUG = "debug";
+static LPCSTR LOGUTIL_NONE = "none";
+
+// prototypes
+static HRESULT LogIdWork(
+    __in REPORT_LEVEL rl,
+    __in_opt HMODULE hModule,
+    __in DWORD dwLogId,
+    __in va_list args,
+    __in BOOL fLOGUTIL_NEWLINE
+    );
+static HRESULT LogStringWorkArgs(
+    __in REPORT_LEVEL rl,
+    __in_z __format_string LPCSTR szFormat,
+    __in va_list args,
+    __in BOOL fLOGUTIL_NEWLINE
+    );
+static HRESULT LogStringWork(
+    __in REPORT_LEVEL rl,
+    __in DWORD dwLogId,
+    __in_z LPCWSTR sczString,
+    __in BOOL fLOGUTIL_NEWLINE
+    );
+
+// Hook to allow redirecting LogStringWorkRaw function calls
+static PFN_LOGSTRINGWORKRAW s_vpfLogStringWorkRaw = NULL;
+static LPVOID s_vpvLogStringWorkRawContext = NULL;
+
+
+/********************************************************************
+ IsLogInitialized - Checks if log is currently initialized.
+********************************************************************/
+extern "C" BOOL DAPI IsLogInitialized()
+{
+    return LogUtil_fInitializedCriticalSection;
+}
+
+/********************************************************************
+ IsLogOpen - Checks if log is currently initialized and open.
+********************************************************************/
+extern "C" BOOL DAPI IsLogOpen()
+{
+    return (INVALID_HANDLE_VALUE != LogUtil_hLog && NULL != LogUtil_sczLogPath);
+}
+
+
+/********************************************************************
+ LogInitialize - initializes the logutil API
+
+********************************************************************/
+extern "C" void DAPI LogInitialize(
+    __in HMODULE hModule
+    )
+{
+    AssertSz(INVALID_HANDLE_VALUE == LogUtil_hLog && !LogUtil_sczLogPath, "LogInitialize() or LogOpen() - already called.");
+
+    LogUtil_hModule = hModule;
+    LogUtil_fDisabled = FALSE;
+
+    ::InitializeCriticalSection(&LogUtil_csLog);
+    LogUtil_fInitializedCriticalSection = TRUE;
+}
+
+
+/********************************************************************
+ LogOpen - creates an application log file
+
+ NOTE: if wzExt is null then wzLog is path to desired log else wzLog and wzExt are used to generate log name
+********************************************************************/
+extern "C" HRESULT DAPI LogOpen(
+    __in_z_opt LPCWSTR wzDirectory,
+    __in_z LPCWSTR wzLog,
+    __in_z_opt LPCWSTR wzPostfix,
+    __in_z_opt LPCWSTR wzExt,
+    __in BOOL fAppend,
+    __in BOOL fHeader,
+    __out_z_opt LPWSTR* psczLogPath
+    )
+{
+    HRESULT hr = S_OK;
+    BOOL fEnteredCriticalSection = FALSE;
+    LPWSTR sczLogDirectory = NULL;
+
+    ::EnterCriticalSection(&LogUtil_csLog);
+    fEnteredCriticalSection = TRUE;
+
+    if (wzExt && *wzExt)
+    {
+        hr = PathCreateTimeBasedTempFile(wzDirectory, wzLog, wzPostfix, wzExt, &LogUtil_sczLogPath, &LogUtil_hLog);
+        ExitOnFailure(hr, "Failed to create log based on current system time.");
+    }
+    else
+    {
+        hr = PathConcat(wzDirectory, wzLog, &LogUtil_sczLogPath);
+        ExitOnFailure(hr, "Failed to combine the log path.");
+
+        hr = PathGetDirectory(LogUtil_sczLogPath, &sczLogDirectory);
+        ExitOnFailure(hr, "Failed to get log directory.");
+
+        hr = DirEnsureExists(sczLogDirectory, NULL);
+        ExitOnFailure(hr, "Failed to ensure log file directory exists: %ls", sczLogDirectory);
+
+        LogUtil_hLog = ::CreateFileW(LogUtil_sczLogPath, GENERIC_WRITE, FILE_SHARE_READ, NULL, (fAppend) ? OPEN_ALWAYS : CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+        if (INVALID_HANDLE_VALUE == LogUtil_hLog)
+        {
+            ExitOnLastError(hr, "failed to create log file: %ls", LogUtil_sczLogPath);
+        }
+
+        if (fAppend)
+        {
+            ::SetFilePointer(LogUtil_hLog, 0, 0, FILE_END);
+        }
+    }
+
+    if (fHeader)
+    {
+        LogHeader();
+    }
+
+    if (NULL != LogUtil_sczPreInitBuffer)
+    {
+        // Log anything that was logged before LogOpen() was called.
+        LogStringWorkRaw(LogUtil_sczPreInitBuffer);
+        ReleaseNullStr(LogUtil_sczPreInitBuffer);
+    }
+
+    if (psczLogPath)
+    {
+        hr = StrAllocString(psczLogPath, LogUtil_sczLogPath, 0);
+        ExitOnFailure(hr, "Failed to copy log path.");
+    }
+
+    LogUtil_fDisabled = FALSE;
+
+LExit:
+    if (fEnteredCriticalSection)
+    {
+        ::LeaveCriticalSection(&LogUtil_csLog);
+    }
+
+    ReleaseStr(sczLogDirectory);
+
+    return hr;
+}
+
+
+/********************************************************************
+ LogDisable - closes any open files and disables in memory logging.
+
+********************************************************************/
+void DAPI LogDisable()
+{
+    ::EnterCriticalSection(&LogUtil_csLog);
+
+    LogUtil_fDisabled = TRUE;
+
+    ReleaseFileHandle(LogUtil_hLog);
+    ReleaseNullStr(LogUtil_sczLogPath);
+    ReleaseNullStr(LogUtil_sczPreInitBuffer);
+
+    ::LeaveCriticalSection(&LogUtil_csLog);
+}
+
+
+/********************************************************************
+ LogRedirect - Redirects all logging strings to the specified
+               function - or set NULL to disable the hook
+********************************************************************/
+void DAPI LogRedirect(
+    __in_opt PFN_LOGSTRINGWORKRAW vpfLogStringWorkRaw,
+    __in_opt LPVOID pvContext
+    )
+{
+    s_vpfLogStringWorkRaw = vpfLogStringWorkRaw;
+    s_vpvLogStringWorkRawContext = pvContext;
+}
+
+
+/********************************************************************
+ LogRename - Renames a logfile, moving its contents to a new path,
+             and re-opening the file for appending at the new
+             location
+********************************************************************/
+HRESULT DAPI LogRename(
+    __in_z LPCWSTR wzNewPath
+    )
+{
+    HRESULT hr = S_OK;
+    BOOL fEnteredCriticalSection = FALSE;
+
+    ::EnterCriticalSection(&LogUtil_csLog);
+    fEnteredCriticalSection = TRUE;
+
+    ReleaseFileHandle(LogUtil_hLog);
+
+    hr = FileEnsureMove(LogUtil_sczLogPath, wzNewPath, TRUE, TRUE);
+    ExitOnFailure(hr, "Failed to move logfile to new location: %ls", wzNewPath);
+
+    hr = StrAllocString(&LogUtil_sczLogPath, wzNewPath, 0);
+    ExitOnFailure(hr, "Failed to store new logfile path: %ls", wzNewPath);
+
+    LogUtil_hLog = ::CreateFileW(LogUtil_sczLogPath, GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (INVALID_HANDLE_VALUE == LogUtil_hLog)
+    {
+        ExitOnLastError(hr, "failed to create log file: %ls", LogUtil_sczLogPath);
+    }
+
+    // Enable "append" mode by moving file pointer to the end
+    ::SetFilePointer(LogUtil_hLog, 0, 0, FILE_END);
+
+LExit:
+    if (fEnteredCriticalSection)
+    {
+        ::LeaveCriticalSection(&LogUtil_csLog);
+    }
+
+    return hr;
+}
+
+
+extern "C" void DAPI LogClose(
+    __in BOOL fFooter
+    )
+{
+    if (INVALID_HANDLE_VALUE != LogUtil_hLog && fFooter)
+    {
+        LogFooter();
+    }
+
+    ReleaseFileHandle(LogUtil_hLog);
+    ReleaseNullStr(LogUtil_sczLogPath);
+    ReleaseNullStr(LogUtil_sczPreInitBuffer);
+}
+
+
+extern "C" void DAPI LogUninitialize(
+    __in BOOL fFooter
+    )
+{
+    LogClose(fFooter);
+
+    if (LogUtil_fInitializedCriticalSection)
+    {
+        ::DeleteCriticalSection(&LogUtil_csLog);
+        LogUtil_fInitializedCriticalSection = FALSE;
+    }
+
+    LogUtil_hModule = NULL;
+    LogUtil_fDisabled = FALSE;
+
+    ReleaseNullStr(LogUtil_sczSpecialBeginLine);
+    ReleaseNullStr(LogUtil_sczSpecialAfterTimeStamp);
+    ReleaseNullStr(LogUtil_sczSpecialEndLine);
+}
+
+
+/********************************************************************
+ LogIsOpen - returns whether log file is open or note
+
+********************************************************************/
+extern "C" BOOL DAPI LogIsOpen()
+{
+    return INVALID_HANDLE_VALUE != LogUtil_hLog;
+}
+
+
+/********************************************************************
+ LogSetSpecialParams - sets a special beginline string, endline
+                       string, post-timestamp string, etc.
+********************************************************************/
+HRESULT DAPI LogSetSpecialParams(
+    __in_z_opt LPCWSTR wzSpecialBeginLine,
+    __in_z_opt LPCWSTR wzSpecialAfterTimeStamp,
+    __in_z_opt LPCWSTR wzSpecialEndLine
+    )
+{
+    HRESULT hr = S_OK;
+
+    // Handle special string to be prepended before every full line
+    if (NULL == wzSpecialBeginLine)
+    {
+        ReleaseNullStr(LogUtil_sczSpecialBeginLine);
+    }
+    else
+    {
+        hr = StrAllocConcat(&LogUtil_sczSpecialBeginLine, wzSpecialBeginLine, 0);
+        ExitOnFailure(hr, "Failed to allocate copy of special beginline string");
+    }
+
+    // Handle special string to be appended to every time stamp
+    if (NULL == wzSpecialAfterTimeStamp)
+    {
+        ReleaseNullStr(LogUtil_sczSpecialAfterTimeStamp);
+    }
+    else
+    {
+        hr = StrAllocConcat(&LogUtil_sczSpecialAfterTimeStamp, wzSpecialAfterTimeStamp, 0);
+        ExitOnFailure(hr, "Failed to allocate copy of special post-timestamp string");
+    }
+
+    // Handle special string to be appended before every full line
+    if (NULL == wzSpecialEndLine)
+    {
+        ReleaseNullStr(LogUtil_sczSpecialEndLine);
+    }
+    else
+    {
+        hr = StrAllocConcat(&LogUtil_sczSpecialEndLine, wzSpecialEndLine, 0);
+        ExitOnFailure(hr, "Failed to allocate copy of special endline string");
+    }
+
+LExit:
+    return hr;
+}
+
+/********************************************************************
+ LogSetLevel - sets the logging level
+
+ NOTE: returns previous logging level
+********************************************************************/
+extern "C" REPORT_LEVEL DAPI LogSetLevel(
+    __in REPORT_LEVEL rl,
+    __in BOOL fLogChange
+    )
+{
+    AssertSz(REPORT_ERROR != rl, "REPORT_ERROR is not a valid logging level to set");
+
+    REPORT_LEVEL rlPrev = LogUtil_rlCurrent;
+
+    if (LogUtil_rlCurrent != rl)
+    {
+        LogUtil_rlCurrent = rl;
+
+        if (fLogChange)
+        {
+            LPCSTR szLevel = LOGUTIL_UNKNOWN;
+            switch (LogUtil_rlCurrent)
+            {
+            case REPORT_WARNING:
+                szLevel = LOGUTIL_WARNING;
+                break;
+            case REPORT_STANDARD:
+                szLevel = LOGUTIL_STANDARD;
+                break;
+            case REPORT_VERBOSE:
+                szLevel = LOGUTIL_VERBOSE;
+                break;
+            case REPORT_DEBUG:
+                szLevel = LOGUTIL_DEBUG;
+                break;
+            case REPORT_NONE:
+                szLevel = LOGUTIL_NONE;
+                break;
+            }
+
+            LogStringLine(REPORT_STANDARD, "--- logging level: %hs ---", szLevel);
+        }
+    }
+
+    return rlPrev;
+}
+
+
+/********************************************************************
+ LogGetLevel - gets the current logging level
+
+********************************************************************/
+extern "C" REPORT_LEVEL DAPI LogGetLevel()
+{
+    return LogUtil_rlCurrent;
+}
+
+
+/********************************************************************
+ LogGetPath - gets the current log path
+
+********************************************************************/
+extern "C" HRESULT DAPI LogGetPath(
+    __out_ecount_z(cchLogPath) LPWSTR pwzLogPath,
+    __in DWORD cchLogPath
+    )
+{
+    Assert(pwzLogPath);
+
+    HRESULT hr = S_OK;
+
+    if (NULL == LogUtil_sczLogPath)        // they can't have a path if there isn't one!
+    {
+        ExitFunction1(hr = E_UNEXPECTED);
+    }
+
+    hr = ::StringCchCopyW(pwzLogPath, cchLogPath, LogUtil_sczLogPath);
+
+LExit:
+    return hr;
+}
+
+
+/********************************************************************
+ LogGetHandle - gets the current log file handle
+
+********************************************************************/
+extern "C" HANDLE DAPI LogGetHandle()
+{
+    return LogUtil_hLog;
+}
+
+
+/********************************************************************
+ LogString - write a string to the log
+
+ NOTE: use printf formatting ("%ls", "%d", etc.)
+********************************************************************/
+extern "C" HRESULT DAPIV LogString(
+    __in REPORT_LEVEL rl,
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    )
+{
+    HRESULT hr = S_OK;
+    va_list args;
+
+    va_start(args, szFormat);
+    hr = LogStringArgs(rl, szFormat, args);
+    va_end(args);
+
+    return hr;
+}
+
+extern "C" HRESULT DAPI LogStringArgs(
+    __in REPORT_LEVEL rl,
+    __in_z __format_string LPCSTR szFormat,
+    __in va_list args
+    )
+{
+    AssertSz(REPORT_NONE != rl, "REPORT_NONE is not a valid logging level");
+    HRESULT hr = S_OK;
+
+    if (REPORT_ERROR != rl && LogUtil_rlCurrent < rl)
+    {
+        ExitFunction1(hr = S_FALSE);
+    }
+
+    hr = LogStringWorkArgs(rl, szFormat, args, FALSE);
+
+LExit:
+    return hr;
+}
+
+/********************************************************************
+ LogStringLine - write a string plus LOGUTIL_NEWLINE to the log
+
+ NOTE: use printf formatting ("%ls", "%d", etc.)
+********************************************************************/
+extern "C" HRESULT DAPIV LogStringLine(
+    __in REPORT_LEVEL rl,
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    )
+{
+    HRESULT hr = S_OK;
+    va_list args;
+
+    va_start(args, szFormat);
+    hr = LogStringLineArgs(rl, szFormat, args);
+    va_end(args);
+
+    return hr;
+}
+
+extern "C" HRESULT DAPI LogStringLineArgs(
+    __in REPORT_LEVEL rl,
+    __in_z __format_string LPCSTR szFormat,
+    __in va_list args
+    )
+{
+    AssertSz(REPORT_NONE != rl, "REPORT_NONE is not a valid logging level");
+    HRESULT hr = S_OK;
+
+    if (REPORT_ERROR != rl && LogUtil_rlCurrent < rl)
+    {
+        ExitFunction1(hr = S_FALSE);
+    }
+
+    hr = LogStringWorkArgs(rl, szFormat, args, TRUE);
+
+LExit:
+    return hr;
+}
+
+/********************************************************************
+ LogIdModuleArgs - write a string embedded in a MESSAGETABLE to the log
+
+ NOTE: uses format string from MESSAGETABLE resource
+********************************************************************/
+
+extern "C" HRESULT DAPI LogIdModuleArgs(
+    __in REPORT_LEVEL rl,
+    __in DWORD dwLogId,
+    __in_opt HMODULE hModule,
+    __in va_list args
+    )
+{
+    AssertSz(REPORT_NONE != rl, "REPORT_NONE is not a valid logging level");
+    HRESULT hr = S_OK;
+
+    if (REPORT_ERROR != rl && LogUtil_rlCurrent < rl)
+    {
+        ExitFunction1(hr = S_FALSE);
+    }
+
+    hr = LogIdWork(rl, (hModule) ? hModule : LogUtil_hModule, dwLogId, args, TRUE);
+
+LExit:
+    return hr;
+}
+
+extern "C" HRESULT DAPI LogIdModule(
+    __in REPORT_LEVEL rl,
+    __in DWORD dwLogId,
+    __in_opt HMODULE hModule,
+    ...
+    )
+{
+    AssertSz(REPORT_NONE != rl, "REPORT_NONE is not a valid logging level");
+    HRESULT hr = S_OK;
+    va_list args;
+
+    if (REPORT_ERROR != rl && LogUtil_rlCurrent < rl)
+    {
+        ExitFunction1(hr = S_FALSE);
+    }
+
+    va_start(args, hModule);
+    hr = LogIdWork(rl, (hModule) ? hModule : LogUtil_hModule, dwLogId, args, TRUE);
+    va_end(args);
+
+LExit:
+    return hr;
+}
+
+
+
+
+/********************************************************************
+ LogError - write an error to the log
+
+ NOTE: use printf formatting ("%ls", "%d", etc.)
+********************************************************************/
+extern "C" HRESULT DAPIV LogErrorString(
+    __in HRESULT hrError,
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    )
+{
+    HRESULT hr  = S_OK;
+
+    va_list args;
+    va_start(args, szFormat);
+    hr = LogErrorStringArgs(hrError, szFormat, args);
+    va_end(args);
+
+    return hr;
+}
+
+extern "C" HRESULT DAPI LogErrorStringArgs(
+    __in HRESULT hrError,
+    __in_z __format_string LPCSTR szFormat,
+    __in va_list args
+    )
+{
+    HRESULT hr  = S_OK;
+    LPWSTR sczFormat = NULL;
+    LPWSTR sczMessage = NULL;
+
+    hr = StrAllocStringAnsi(&sczFormat, szFormat, 0, CP_ACP);
+    ExitOnFailure(hr, "Failed to convert format string to wide character string");
+
+    // format the string as a unicode string - this is necessary to be able to include
+    // international characters in our output string. This does have the counterintuitive effect
+    // that the caller's "%s" is interpreted differently
+    // (so callers should use %hs for LPSTR and %ls for LPWSTR)
+    hr = StrAllocFormattedArgs(&sczMessage, sczFormat, args);
+    ExitOnFailure(hr, "Failed to format error message: \"%ls\"", sczFormat);
+
+    hr = LogStringLine(REPORT_ERROR, "Error 0x%x: %ls", hrError, sczMessage);
+
+LExit:
+    ReleaseStr(sczFormat);
+    ReleaseStr(sczMessage);
+
+    return hr;
+}
+
+
+/********************************************************************
+ LogErrorIdModule - write an error string embedded in a MESSAGETABLE to the log
+
+ NOTE:  uses format string from MESSAGETABLE resource
+        can log no more than three strings in the error message
+********************************************************************/
+extern "C" HRESULT DAPI LogErrorIdModule(
+    __in HRESULT hrError,
+    __in DWORD dwLogId,
+    __in_opt HMODULE hModule,
+    __in_z_opt LPCWSTR wzString1 = NULL,
+    __in_z_opt LPCWSTR wzString2 = NULL,
+    __in_z_opt LPCWSTR wzString3 = NULL
+    )
+{
+    HRESULT hr = S_OK;
+    WCHAR wzError[11];
+    WORD cStrings = 1; // guaranteed wzError is in the list
+
+    hr = ::StringCchPrintfW(wzError, countof(wzError), L"0x%08x", hrError);
+    ExitOnFailure(hr, "failed to format error code: \"0%08x\"", hrError);
+
+    cStrings += wzString1 ? 1 : 0;
+    cStrings += wzString2 ? 1 : 0;
+    cStrings += wzString3 ? 1 : 0;
+
+    hr = LogIdModule(REPORT_ERROR, dwLogId, hModule, wzError, wzString1, wzString2, wzString3);
+    ExitOnFailure(hr, "Failed to log id module.");
+
+LExit:
+    return hr;
+}
+
+/********************************************************************
+ LogHeader - write a standard header to the log
+
+********************************************************************/
+extern "C" HRESULT DAPI LogHeader()
+{
+    HRESULT hr = S_OK;
+    WCHAR wzComputerName[MAX_PATH];
+    DWORD cchComputerName = countof(wzComputerName);
+    WCHAR wzPath[MAX_PATH];
+    DWORD dwMajorVersion = 0;
+    DWORD dwMinorVersion = 0;
+    LPCSTR szLevel = LOGUTIL_UNKNOWN;
+    LPWSTR sczCurrentDateTime = NULL;
+
+    //
+    // get the interesting data
+    //
+    if (!::GetModuleFileNameW(NULL, wzPath, countof(wzPath)))
+    {
+        memset(wzPath, 0, sizeof(wzPath));
+    }
+
+    hr = FileVersion(wzPath, &dwMajorVersion, &dwMinorVersion);
+    if (FAILED(hr))
+    {
+        dwMajorVersion = 0;
+        dwMinorVersion = 0;
+    }
+
+    if (!::GetComputerNameW(wzComputerName, &cchComputerName))
+    {
+        ::SecureZeroMemory(wzComputerName, sizeof(wzComputerName));
+    }
+
+    TimeCurrentDateTime(&sczCurrentDateTime, FALSE);
+
+    //
+    // write data to the log
+    //
+    LogStringLine(REPORT_STANDARD, "=== Logging started: %ls ===", sczCurrentDateTime);
+    LogStringLine(REPORT_STANDARD, "Executable: %ls v%d.%d.%d.%d", wzPath, dwMajorVersion >> 16, dwMajorVersion & 0xFFFF, dwMinorVersion >> 16, dwMinorVersion & 0xFFFF);
+    LogStringLine(REPORT_STANDARD, "Computer  : %ls", wzComputerName);
+    switch (LogUtil_rlCurrent)
+    {
+    case REPORT_WARNING:
+        szLevel = LOGUTIL_WARNING;
+        break;
+    case REPORT_STANDARD:
+        szLevel = LOGUTIL_STANDARD;
+        break;
+    case REPORT_VERBOSE:
+        szLevel = LOGUTIL_VERBOSE;
+        break;
+    case REPORT_DEBUG:
+        szLevel = LOGUTIL_DEBUG;
+        break;
+    case REPORT_NONE:
+        szLevel = LOGUTIL_NONE;
+        break;
+    }
+    LogStringLine(REPORT_STANDARD, "--- logging level: %hs ---", szLevel);
+
+    hr = S_OK;
+
+    ReleaseStr(sczCurrentDateTime);
+
+    return hr;
+}
+
+
+/********************************************************************
+ LogFooterWork - write a standard footer to the log
+
+********************************************************************/
+
+static HRESULT LogFooterWork(
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    )
+{
+    HRESULT hr = S_OK;
+
+    va_list args;
+    va_start(args, szFormat);
+    hr = LogStringWorkArgs(REPORT_STANDARD, szFormat, args, TRUE);
+    va_end(args);
+
+    return hr;
+}
+
+extern "C" HRESULT DAPI LogFooter()
+{
+    HRESULT hr = S_OK;
+    LPWSTR sczCurrentDateTime = NULL;
+    TimeCurrentDateTime(&sczCurrentDateTime, FALSE);
+    hr = LogFooterWork("=== Logging stopped: %ls ===", sczCurrentDateTime);
+    ReleaseStr(sczCurrentDateTime);
+    return hr;
+}
+
+/********************************************************************
+ LogStringWorkRaw - Write a raw, unformatted string to the log
+
+********************************************************************/
+extern "C" HRESULT LogStringWorkRaw(
+    __in_z LPCSTR szLogData
+    )
+{
+    Assert(szLogData && *szLogData);
+
+    HRESULT hr = S_OK;
+    DWORD cbLogData = 0;
+    DWORD cbTotal = 0;
+    DWORD cbWrote = 0;
+
+    cbLogData = lstrlenA(szLogData);
+
+    // If the log hasn't been initialized yet, store it in a buffer
+    if (INVALID_HANDLE_VALUE == LogUtil_hLog)
+    {
+        hr = StrAnsiAllocConcat(&LogUtil_sczPreInitBuffer, szLogData, 0);
+        ExitOnFailure(hr, "Failed to concatenate string to pre-init buffer");
+
+        ExitFunction1(hr = S_OK);
+    }
+
+    // write the string
+    while (cbTotal < cbLogData)
+    {
+        if (!::WriteFile(LogUtil_hLog, reinterpret_cast<const BYTE*>(szLogData) + cbTotal, cbLogData - cbTotal, &cbWrote, NULL))
+        {
+            ExitOnLastError(hr, "Failed to write output to log: %ls - %ls", LogUtil_sczLogPath, szLogData);
+        }
+
+        cbTotal += cbWrote;
+    }
+
+LExit:
+    return hr;
+}
+
+//
+// private worker functions
+//
+static HRESULT LogIdWork(
+    __in REPORT_LEVEL rl,
+    __in_opt HMODULE hModule,
+    __in DWORD dwLogId,
+    __in va_list args,
+    __in BOOL fLOGUTIL_NEWLINE
+    )
+{
+    HRESULT hr = S_OK;
+    LPWSTR pwz = NULL;
+    DWORD cch = 0;
+
+    // get the string for the id
+#pragma prefast(push)
+#pragma prefast(disable:25028)
+#pragma prefast(disable:25068)
+    cch = ::FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_HMODULE,
+                           static_cast<LPCVOID>(hModule), dwLogId, 0, reinterpret_cast<LPWSTR>(&pwz), 0, &args);
+#pragma prefast(pop)
+
+    if (0 == cch)
+    {
+        ExitOnLastError(hr, "failed to log id: %d", dwLogId);
+    }
+
+    if (2 <= cch && L'\r' == pwz[cch-2] && L'\n' == pwz[cch-1])
+    {
+        pwz[cch-2] = L'\0'; // remove newline from message table
+    }
+
+    LogStringWork(rl, dwLogId, pwz, fLOGUTIL_NEWLINE);
+
+LExit:
+    if (pwz)
+    {
+        ::LocalFree(pwz);
+    }
+
+    return hr;
+}
+
+
+static HRESULT LogStringWorkArgs(
+    __in REPORT_LEVEL rl,
+    __in_z __format_string LPCSTR szFormat,
+    __in va_list args,
+    __in BOOL fLOGUTIL_NEWLINE
+    )
+{
+    Assert(szFormat && *szFormat);
+
+    HRESULT hr = S_OK;
+    LPWSTR sczFormat = NULL;
+    LPWSTR sczMessage = NULL;
+
+    hr = StrAllocStringAnsi(&sczFormat, szFormat, 0, CP_ACP);
+    ExitOnFailure(hr, "Failed to convert format string to wide character string");
+
+    // format the string as a unicode string
+    hr = StrAllocFormattedArgs(&sczMessage, sczFormat, args);
+    ExitOnFailure(hr, "Failed to format message: \"%ls\"", sczFormat);
+
+    hr = LogStringWork(rl, 0, sczMessage, fLOGUTIL_NEWLINE);
+    ExitOnFailure(hr, "Failed to write formatted string to log:%ls", sczMessage);
+
+LExit:
+    ReleaseStr(sczFormat);
+    ReleaseStr(sczMessage);
+
+    return hr;
+}
+
+
+static HRESULT LogStringWork(
+    __in REPORT_LEVEL rl,
+    __in DWORD dwLogId,
+    __in_z LPCWSTR sczString,
+    __in BOOL fLOGUTIL_NEWLINE
+    )
+{
+    Assert(sczString && *sczString);
+
+    HRESULT hr = S_OK;
+    BOOL fEnteredCriticalSection = FALSE;
+    LPWSTR scz = NULL;
+    LPCWSTR wzLogData = NULL;
+    LPSTR sczMultiByte = NULL;
+
+    // If logging is disabled, just bail.
+    if (LogUtil_fDisabled)
+    {
+        ExitFunction();
+    }
+
+    ::EnterCriticalSection(&LogUtil_csLog);
+    fEnteredCriticalSection = TRUE;
+
+    if (fLOGUTIL_NEWLINE)
+    {
+        // get the process and thread id.
+        DWORD dwProcessId = ::GetCurrentProcessId();
+        DWORD dwThreadId = ::GetCurrentThreadId();
+
+        // get the time relative to GMT.
+        SYSTEMTIME st = { };
+        ::GetLocalTime(&st);
+
+        DWORD dwId = dwLogId & 0xFFFFFFF;
+        DWORD dwType = dwLogId & 0xF0000000;
+        LPSTR szType = (0xE0000000 == dwType || REPORT_ERROR == rl) ? "e" : (0xA0000000 == dwType || REPORT_WARNING == rl) ? "w" : "i";
+
+        // add line prefix and trailing newline
+        hr = StrAllocFormatted(&scz, L"%ls[%04X:%04X][%04hu-%02hu-%02huT%02hu:%02hu:%02hu]%hs%03d:%ls %ls%ls", LogUtil_sczSpecialBeginLine ? LogUtil_sczSpecialBeginLine : L"",
+            dwProcessId, dwThreadId, st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, szType, dwId,
+            LogUtil_sczSpecialAfterTimeStamp ? LogUtil_sczSpecialAfterTimeStamp : L"", sczString, LogUtil_sczSpecialEndLine ? LogUtil_sczSpecialEndLine : L"\r\n");
+        ExitOnFailure(hr, "Failed to format line prefix.");
+    }
+
+    wzLogData = scz ? scz : sczString;
+
+    // Convert to UTF-8 before writing out to the log file
+    hr = StrAnsiAllocString(&sczMultiByte, wzLogData, 0, CP_UTF8);
+    ExitOnFailure(hr, "Failed to convert log string to UTF-8");
+
+    if (s_vpfLogStringWorkRaw)
+    {
+        hr = s_vpfLogStringWorkRaw(sczMultiByte, s_vpvLogStringWorkRawContext);
+        ExitOnFailure(hr, "Failed to write string to log using redirected function: %ls", sczString);
+    }
+    else
+    {
+        hr = LogStringWorkRaw(sczMultiByte);
+        ExitOnFailure(hr, "Failed to write string to log using default function: %ls", sczString);
+    }
+
+LExit:
+    if (fEnteredCriticalSection)
+    {
+        ::LeaveCriticalSection(&LogUtil_csLog);
+    }
+
+    ReleaseStr(scz);
+    ReleaseStr(sczMultiByte);
+
+    return hr;
+}