Windows2003-3790/inetsrv/iis/svcs/smtp/smtpctrs/perfutil.c

//#---------------------------------------------------------------
//  File:		perfutil.c
//
//  Synopsis:	This file implements the utility routines used
//				to construct the common parts of a
//				PERF_INSTANCE_DEFINITION (see winperf.h) and
//				perform event logging functions.
//
//	Copyright (C) 1995 Microsoft Corporation
//	All rights reserved.
//
//  Authors:	toddch - based on msn sources by rkamicar, Russ Blake
//----------------------------------------------------------------
#ifdef	THISFILE
#undef	THISFILE
#endif
static	const char	__szTraceSourceFile[] = __FILE__;
#define	THISFILE	__szTraceSourceFile

#define NOTRACE
//
//  include files
//
#include <windows.h>
#include <string.h>
#include <winperf.h>
#include "smtpctrs.h"	// error message definition
#include "perfmsg.h"
#include "perfutil.h"

//
// Global data definitions.
//

DWORD MESSAGE_LEVEL = 0;

WCHAR GLOBAL_STRING[] = L"Global";
WCHAR FOREIGN_STRING[] = L"Foreign";
WCHAR COSTLY_STRING[] = L"Costly";

WCHAR NULL_STRING[] = L"\0";	// pointer to null string

// test for delimiter, end of line and non-digit characters
// used by IsNumberInUnicodeList routine
//
#define DIGIT	1
#define DELIMITER   2
#define INVALID	3

#define EvalThisChar(c,d) (\
	(c == d) ? DELIMITER : \
	(c == 0) ? DELIMITER : \
	(c < (WCHAR)'0') ? INVALID : \
	(c > (WCHAR)'9') ? INVALID : \
	DIGIT)

DWORD
GetQueryType (
	IN LPWSTR lpValue
)
/*++

GetQueryType

	returns the type of query described in the lpValue string so that
	the appropriate processing method may be used

Arguments

	IN lpValue
		string passed to PerfRegQuery Value for processing

Return Value

	QUERY_GLOBAL
		if lpValue == 0 (null pointer)
		lpValue == pointer to Null string
		lpValue == pointer to "Global" string

	QUERY_FOREIGN
		if lpValue == pointer to "Foriegn" string

	QUERY_COSTLY
		if lpValue == pointer to "Costly" string

	otherwise:

	QUERY_ITEMS

--*/
{
	WCHAR   *pwcArgChar, *pwcTypeChar;
	BOOL	bFound;

	if (lpValue == 0) {
		return QUERY_GLOBAL;
	} else if (*lpValue == 0) {
		return QUERY_GLOBAL;
	}

	// check for "Global" request

	pwcArgChar = lpValue;
	pwcTypeChar = GLOBAL_STRING;
	bFound = TRUE;  // assume found until contradicted

	// check to the length of the shortest string

	while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
		if (*pwcArgChar++ != *pwcTypeChar++) {
			bFound = FALSE; // no match
			break;		// bail out now
		}
	}

	if (bFound) return QUERY_GLOBAL;

	// check for "Foreign" request

	pwcArgChar = lpValue;
	pwcTypeChar = FOREIGN_STRING;
	bFound = TRUE;  // assume found until contradicted

	// check to the length of the shortest string

	while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
		if (*pwcArgChar++ != *pwcTypeChar++) {
			bFound = FALSE; // no match
			break;		// bail out now
		}
	}

	if (bFound) return QUERY_FOREIGN;

	// check for "Costly" request

	pwcArgChar = lpValue;
	pwcTypeChar = COSTLY_STRING;
	bFound = TRUE;  // assume found until contradicted

	// check to the length of the shortest string

	while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
		if (*pwcArgChar++ != *pwcTypeChar++) {
			bFound = FALSE; // no match
			break;		// bail out now
		}
	}

	if (bFound) return QUERY_COSTLY;

	// if not Global and not Foreign and not Costly,
	// then it must be an item list

	return QUERY_ITEMS;

}


BOOL
IsNumberInUnicodeList (
	IN DWORD   dwNumber,
	IN LPWSTR  lpwszUnicodeList
)
/*++

IsNumberInUnicodeList

Arguments:

	IN dwNumber
		DWORD number to find in list

	IN lpwszUnicodeList
		Null terminated, Space delimited list of decimal numbers

Return Value:

	TRUE:
			dwNumber was found in the list of unicode number strings

	FALSE:
			dwNumber was not found in the list.

--*/
{
	DWORD   dwThisNumber;
	WCHAR   *pwcThisChar;
	BOOL	bValidNumber;
	BOOL	bNewItem;
	WCHAR   wcDelimiter;	// could be an argument to be more flexible

	if (lpwszUnicodeList == 0) return FALSE;	// null pointer, # not founde

	pwcThisChar = lpwszUnicodeList;
	dwThisNumber = 0;
	wcDelimiter = (WCHAR)' ';
	bValidNumber = FALSE;
	bNewItem = TRUE;

	while (TRUE) {
		switch (EvalThisChar (*pwcThisChar, wcDelimiter)) {
			case DIGIT:
				// if this is the first digit after a delimiter, then
				// set flags to start computing the new number
				if (bNewItem) {
					bNewItem = FALSE;
					bValidNumber = TRUE;
				}
				if (bValidNumber) {
					dwThisNumber *= 10;
					dwThisNumber += (*pwcThisChar - (WCHAR)'0');
				}
				break;

			case DELIMITER:
				// a delimter is either the delimiter character or the
				// end of the string ('\0') if when the delimiter has been
				// reached a valid number was found, then compare it to the
				// number from the argument list. if this is the end of the
				// string and no match was found, then return.
				//
				if (bValidNumber) {
					if (dwThisNumber == dwNumber) return TRUE;
					bValidNumber = FALSE;
				}
				if (*pwcThisChar == 0) {
					return FALSE;
				} else {
					bNewItem = TRUE;
					dwThisNumber = 0;
				}
				break;

			case INVALID:
				// if an invalid character was encountered, ignore all
				// characters up to the next delimiter and then start fresh.
				// the invalid number is not compared.
				bValidNumber = FALSE;
				break;

			default:
				break;

		}
		pwcThisChar++;
	}

}   // IsNumberInUnicodeList