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240 lines
3.6 KiB
240 lines
3.6 KiB
/*++
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Copyright (c) 1999 Microsoft Corporation
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Module Name:
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logutil.c
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Abstract:
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Helper routines for logging data.
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Author:
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03-Oct-1999 SamerA
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Revision History:
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--*/
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#include "w64logp.h"
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WOW64LOGAPI
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NTSTATUS
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Wow64LogMessageArgList(
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IN UINT_PTR Flags,
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IN PSZ Format,
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IN va_list ArgList)
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/*++
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Routine Description:
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Logs a message.
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Arguments:
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Flags - Determine the output log type
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Format - Formatting string
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... - Variable argument
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Return Value:
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NTSTATUS
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--*/
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{
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int BytesWritten;
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CHAR Buffer[ MAX_LOG_BUFFER ];
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//
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// Check trace gate flag
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//
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if (!((Wow64LogFlags & ~(UINT_PTR)LF_CONSOLE) & Flags))
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{
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return STATUS_SUCCESS;
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}
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BytesWritten = _vsnprintf(Buffer,
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sizeof(Buffer) - 1,
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Format,
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ArgList);
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if (BytesWritten < 0)
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{
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return STATUS_BUFFER_TOO_SMALL;
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}
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//
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// Log the results
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//
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LogOut(Buffer, Wow64LogFlags);
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return STATUS_SUCCESS;
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}
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WOW64LOGAPI
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NTSTATUS
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Wow64LogMessage(
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IN UINT_PTR Flags,
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IN PSZ Format,
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IN ...)
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/*++
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Routine Description:
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Helper around logs a message that accepts a variable argument list
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Arguments:
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Flags - Determine the output log type
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Format - Formatting string
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... - Variable argument
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Return Value:
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NTSTATUS
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--*/
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{
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NTSTATUS NtStatus;
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va_list ArgList;
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va_start(ArgList, Format);
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NtStatus = Wow64LogMessageArgList(Flags, Format, ArgList);
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va_end(ArgList);
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return NtStatus;
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}
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NTSTATUS
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LogFormat(
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IN OUT PLOGINFO LogInfo,
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IN PSZ Format,
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...)
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/*++
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Routine Description:
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Formats a message
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Arguments:
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LogInfo - Logging Information (buffer + available bytes)
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pszFormat - Format string
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... - Optional arguments
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Return Value:
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NTSTATUS - BufferSize is increment with the amount of bytes
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written if successful.
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--*/
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{
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va_list ArgList;
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NTSTATUS NtStatus = STATUS_SUCCESS;
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int BytesWritten;
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va_start(ArgList, Format);
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BytesWritten = _vsnprintf(LogInfo->OutputBuffer, LogInfo->BufferSize, Format, ArgList);
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va_end(ArgList);
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if (BytesWritten < 0)
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{
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NtStatus = STATUS_BUFFER_TOO_SMALL;
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}
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else
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{
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LogInfo->BufferSize -= BytesWritten;
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LogInfo->OutputBuffer += BytesWritten;
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}
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return NtStatus;
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}
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VOID
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LogOut(
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IN PSZ Text,
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UINT_PTR Flags
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)
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/*++
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Routine Description:
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Logs -outputs- a message
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Arguments:
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Text - Formatted string to log
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Flags - Control flags
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Return Value:
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None
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--*/
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{
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if ((Flags & LF_CONSOLE) != 0)
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{
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DbgPrint(Text);
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}
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//
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// Check if we need to send the output to a file
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//
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if (Wow64LogFileHandle != INVALID_HANDLE_VALUE)
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{
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LogWriteFile(Wow64LogFileHandle, Text);
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}
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}
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NTSTATUS
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LogWriteFile(
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IN HANDLE FileHandle,
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IN PSZ LogText)
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/*++
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Routine Description:
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Writes text to a file handle
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Arguments:
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FileHandle - Handle to a file object
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LogText - Text to log to file
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Return Value:
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NTSTATUS
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--*/
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{
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IO_STATUS_BLOCK IoStatus;
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NTSTATUS NtStatus;
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NtStatus = NtWriteFile(FileHandle,
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NULL, // event
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NULL, // apcroutine
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NULL, // apccontext
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&IoStatus,
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LogText,
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strlen(LogText),
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NULL, // ByteOffset
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NULL); // key
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return NtStatus;
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}
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