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Annotation of mstools/samples/sdktools/pviewer/objdata.c, revision 1.1

1.1     ! root        1: 
        !             2: /******************************************************************************\
        !             3: *       This is a part of the Microsoft Source Code Samples. 
        !             4: *       Copyright (C) 1993 Microsoft Corporation.
        !             5: *       All rights reserved. 
        !             6: *       This source code is only intended as a supplement to 
        !             7: *       Microsoft Development Tools and/or WinHelp documentation.
        !             8: *       See these sources for detailed information regarding the 
        !             9: *       Microsoft samples programs.
        !            10: \******************************************************************************/
        !            11: 
        !            12: 
        !            13: /******************************************************************************
        !            14: 
        !            15:                                 O B J E C T   D A T A
        !            16: 
        !            17:     Name:       objdata.c
        !            18: 
        !            19:     Description:
        !            20:         This module contains functions that access objects in performance
        !            21:         data.
        !            22: 
        !            23:     Functions:
        !            24:         FirstObject
        !            25:         NextObject
        !            26:         FindObject
        !            27:         FindObjectN
        !            28: 
        !            29: ******************************************************************************/
        !            30: 
        !            31: #include <windows.h>
        !            32: #include <winperf.h>
        !            33: #include "perfdata.h"
        !            34: 
        !            35: 
        !            36: 
        !            37: 
        !            38: //*********************************************************************
        !            39: //
        !            40: //  FirstObject
        !            41: //
        !            42: //      Returns pointer to the first object in pData.
        !            43: //      If pData is NULL then NULL is returned.
        !            44: //
        !            45: PPERF_OBJECT FirstObject (PPERF_DATA pData)
        !            46: {
        !            47:     if (pData)
        !            48:         return ((PPERF_OBJECT) ((PBYTE) pData + pData->HeaderLength));
        !            49:     else
        !            50:         return NULL;
        !            51: }
        !            52: 
        !            53: 
        !            54: 
        !            55: 
        !            56: //*********************************************************************
        !            57: //
        !            58: //  NextObject
        !            59: //
        !            60: //      Returns pointer to the next object following pObject.
        !            61: //
        !            62: //      If pObject is the last object, bogus data maybe returned.
        !            63: //      The caller should do the checking.
        !            64: //
        !            65: //      If pObject is NULL, then NULL is returned.
        !            66: //
        !            67: PPERF_OBJECT NextObject (PPERF_OBJECT pObject)
        !            68: {
        !            69:     if (pObject)
        !            70:         return ((PPERF_OBJECT) ((PBYTE) pObject + pObject->TotalByteLength));
        !            71:     else
        !            72:         return NULL;
        !            73: }
        !            74: 
        !            75: 
        !            76: 
        !            77: 
        !            78: //*********************************************************************
        !            79: //
        !            80: //  FindObject
        !            81: //
        !            82: //      Returns pointer to object with TitleIndex.  If not found, NULL
        !            83: //      is returned.
        !            84: //
        !            85: PPERF_OBJECT FindObject (PPERF_DATA pData, DWORD TitleIndex)
        !            86: {
        !            87: PPERF_OBJECT pObject;
        !            88: DWORD        i = 0;
        !            89: 
        !            90:     if (pObject = FirstObject (pData))
        !            91:         while (i < pData->NumObjectTypes)
        !            92:             {
        !            93:             if (pObject->ObjectNameTitleIndex == TitleIndex)
        !            94:                 return pObject;
        !            95: 
        !            96:             pObject = NextObject (pObject);
        !            97:             i++;
        !            98:             }
        !            99: 
        !           100:     return NULL;
        !           101: }
        !           102: 
        !           103: 
        !           104: 
        !           105: 
        !           106: //*********************************************************************
        !           107: //
        !           108: //  FindObjectN
        !           109: //
        !           110: //      Find the Nth object in pData.  If not found, NULL is returned.
        !           111: //      0 <= N < NumObjectTypes.
        !           112: //
        !           113: PPERF_OBJECT FindObjectN (PPERF_DATA pData, DWORD N)
        !           114: {
        !           115: PPERF_OBJECT pObject;
        !           116: DWORD        i = 0;
        !           117: 
        !           118:     if (!pData)
        !           119:         return NULL;
        !           120:     else if (N >= pData->NumObjectTypes)
        !           121:         return NULL;
        !           122:     else
        !           123:         {
        !           124:         pObject = FirstObject (pData);
        !           125: 
        !           126:         while (i != N)
        !           127:             {
        !           128:             pObject = NextObject (pObject);
        !           129:             i++;
        !           130:             }
        !           131: 
        !           132:         return pObject;
        !           133:         }
        !           134: }

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