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Annotation of pmsdk/samples/newcard/pmbind.c, revision 1.1

1.1     ! root        1: #define  INCL_DOS
        !             2: #define  INCL_WIN
        !             3: #define  INCL_GPI
        !             4: #include "os2.h"
        !             5: #include "pmbind1.h"
        !             6: 
        !             7: 
        !             8: /*********************************************************************/
        !             9: /*  PM Code for Shared Code System                                   */
        !            10: /*                                                                   */
        !            11: /*  (c) Copyright Microsoft Corp. 1987,1988 - All Rights Reserved    */
        !            12: /*********************************************************************/
        !            13: 
        !            14: 
        !            15: /*********************************************************************/
        !            16: /*    Many of the Windows functions can be mapped into equivalent    */
        !            17: /* PM functions through the use of defines.  This file is for those  */
        !            18: /* functions which can't.                                            */
        !            19: /*                                                                   */
        !            20: /*    For some Windows functions, such as ChangeMenu or SendMessage, */
        !            21: /* it is necessary to require the user to examine these on a case    */
        !            22: /* by case basis in the application sources.                         */
        !            23: /*                                                                   */
        !            24: /*    Other functions, such as OpenFile, DlgDirList, and             */
        !            25: /* DlgDirSelect, are used commonly used but have no PM equivalent.   */
        !            26: /* These functions are implemented in this file.                     */
        !            27: /*                                                                   */
        !            28: /* Functions Implemented:                                            */
        !            29: /*    CheckScrollBars - In PM, scroll bars don't disappear when      */
        !            30: /*       the high and low ends of the range are the same.  This      */
        !            31: /*       function utilizes features of frame and control windows     */
        !            32: /*       to allow the bar to be shown or hidden.  This is called     */
        !            33: /*       from the pmbind.h file.                                     */
        !            34: /*                                                                   */
        !            35: /*    DlgDirList - In PM, this useful function is not present.       */
        !            36: /*       This function accepts the same parameters as the Windows    */
        !            37: /*       version, so calls to it in the source may remain unchanged. */
        !            38: /*                                                                   */
        !            39: /*    DlgDirSelect - This function doesn't exist in PM and is the    */
        !            40: /*       companion function to DlgDirList.                           */
        !            41: /*                                                                   */
        !            42: /*    OpenFile - This function doesn't exist in PM.  In Windows,     */
        !            43: /*       OpenFile handles a variety of operations, including         */
        !            44: /*       creating, opening, and deleting files, and parsing          */
        !            45: /*       filenames.  The type OFSTRUCT is defined in one of the      */
        !            46: /*       h files, so calls to OpenFile in the source code don't      */
        !            47: /*       have to be modified.                                        */
        !            48: /*                                                                   */
        !            49: /*                                                                   */
        !            50: /* Additionally, a few utility functions are present for use in      */
        !            51: /* the binding functions:                                            */
        !            52: /*    lstrcpy                                                        */
        !            53: /*    lstrlen                                                        */
        !            54: /*    lstrcat                                                        */
        !            55: /*    lmemcpy                                                        */
        !            56: /*                                                                   */
        !            57: /* These functions are not called by the application, only by the    */
        !            58: /* binding system.                                                   */
        !            59: /*********************************************************************/
        !            60: 
        !            61: 
        !            62: /*********************************************************************/
        !            63: /* Internal variables used by binding system.                        */
        !            64: /*********************************************************************/
        !            65: 
        !            66: HAB     hAB;              /* Holds the anchor block handle */
        !            67: HMQ     hMQ;              /* Holds the message queue handle */
        !            68: int     temp;             /* Temp Var, used for many mappings */
        !            69: POINTL  Point;            /* Temp Var, used for many mappings */
        !            70: WPOINT  pt;               /* Temp Var, used for many mappings */
        !            71: HHEAP   hLocalHeap;       /* Holds the cardfile's local heap */
        !            72: int     WinHeight = 0;    /* Holds the current translate value */
        !            73: int     b_CharHeight = 0; /* Character height, default is 0 */
        !            74: WRECT   TempRect;         /* Temp Var, used for many mappings */
        !            75: PWRECT  lTempRect = &TempRect; /* Temp Var, used for many mappings */
        !            76: HWND    hwndTemp;         /* Temp Var, used for many mappings */
        !            77: POINTL  PointArray[2];    /* Temp Var, used for many mappings */
        !            78: 
        !            79: 
        !            80: /*********************************************************************/
        !            81: /* In order resolve type conflicts warnings with the use of the      */
        !            82: /*  MPARAM type, make a define to convert all WinSendMsg's.          */
        !            83: /*********************************************************************/
        !            84: 
        !            85: #define  NewSendMsg( a, b, c, d )   \
        !            86:             LONGFROMMR( WinSendMsg( a, b, MPFROMLONG(c), MPFROMLONG(d) ))
        !            87: 
        !            88: #define  NewSendDlgItemMsg( a, b, c, d, e ) \
        !            89:             LONGFROMMR(WinSendDlgItemMsg( a, b, c, \
        !            90:                                           MPFROMLONG(d), MPFROMLONG(e) ))
        !            91: 
        !            92: /*********************************************************************/
        !            93: /* Binding system functions                                          */
        !            94: /*********************************************************************/
        !            95: 
        !            96: int      CheckScrollBars( HWND, unsigned, int );
        !            97: int   FAR PASCAL  lstrlen( PSZ );
        !            98: PSZ   FAR PASCAL  lstrcpy( PSZ, PSZ );
        !            99: PSZ   FAR PASCAL  lstrcat( PSZ, PSZ );
        !           100: void  FAR PASCAL  lmemcpy( PSZ, PSZ, unsigned );
        !           101: 
        !           102: /*********************************************************************/
        !           103: /* Internal functions                                                */
        !           104: /*********************************************************************/
        !           105: 
        !           106: int      FillListBox( HWND, unsigned, PSZ );
        !           107: PSZ      ParseFile( PSZ, PSZ, BOOL );
        !           108: PSZ      GetFileFromPath( PSZ );
        !           109: 
        !           110: /*********************************************************************/
        !           111: /* Functions to be called from source                                */
        !           112: /*********************************************************************/
        !           113: 
        !           114: int      DlgDirList( HWND, PSZ, unsigned, unsigned, unsigned );
        !           115: unsigned DlgDirSelect( HWND, PSZ, unsigned );
        !           116: int      OpenFile( PSZ, LPOFSTRUCT, WORD );
        !           117: 
        !           118: 
        !           119: /*********************************************************************/
        !           120: /* Defines                                                           */
        !           121: /*********************************************************************/
        !           122: 
        !           123: 
        !           124: 
        !           125: /* Note: This bit must not be the same as a bit in the frame id's  */
        !           126: /*       for scroll bars! (FID_HORZSCROLL | FID_VERTSCROLL) */
        !           127: 
        !           128: #define  HIDE_BIT    0x0800         /* Bit to hide scroll bar */
        !           129: #define  HIDE_MASK   ~HIDE_BIT      /* Mask for bit */
        !           130: 
        !           131: 
        !           132: #define  MAX_PATH_LEN   100         /* Max. length of path + filename */
        !           133: #define  DIR_ATTRIBUTE  0x10        /* Attribute to search for dir's */
        !           134: 
        !           135: 
        !           136: 
        !           137: /*********************************************************************/
        !           138: /* Binding System Variables:                                         */
        !           139: /*                                                                   */
        !           140: /*    Because this is the only C file in the binding system, all     */
        !           141: /* variables used in the binding system are allocated here.  None of */
        !           142: /* these variables are used in this file.                            */
        !           143: /*********************************************************************/
        !           144: 
        !           145: 
        !           146: 
        !           147: 
        !           148: /*********************************************************************/
        !           149: /* lstrlen - standard                                                */
        !           150: /*********************************************************************/
        !           151: 
        !           152: int   FAR PASCAL lstrlen( pStr )
        !           153: PSZ   pStr;
        !           154: {
        !           155:    int   j;
        !           156: 
        !           157:    for (j = 0; *(pStr++); j++);
        !           158: 
        !           159:    return j;
        !           160: }
        !           161: 
        !           162: /*********************************************************************/
        !           163: /* lstrcpy - standard                                                */
        !           164: /*********************************************************************/
        !           165: 
        !           166: PSZ   FAR PASCAL  lstrcpy( pDest, pSrc )
        !           167: PSZ   pDest, pSrc;
        !           168: {
        !           169:    PSZ pTemp = pDest;
        !           170: 
        !           171:    do {
        !           172:       *(pDest++) = *(pSrc);
        !           173:    } while ( *(pSrc++) );
        !           174: 
        !           175:    return( pTemp );
        !           176: }   
        !           177: 
        !           178: /*********************************************************************/
        !           179: /* lstrcat - standard                                                */
        !           180: /*********************************************************************/
        !           181: 
        !           182: PSZ   FAR PASCAL  lstrcat( pDest, pSrc )
        !           183: PSZ   pDest, pSrc;
        !           184: {
        !           185:    PSZ pTemp = pDest;
        !           186: 
        !           187:    while (*(pDest++));
        !           188: 
        !           189:    pDest--;
        !           190:    do {
        !           191:       *(pDest++) = *(pSrc);
        !           192:    } while ( *(pSrc++) );
        !           193: 
        !           194:    return( pTemp );
        !           195: }
        !           196: 
        !           197: /*********************************************************************/
        !           198: /* lmemcpy - standard                                                */
        !           199: /*********************************************************************/
        !           200: 
        !           201: void  FAR PASCAL lmemcpy( pDest, pSrc, wCount )
        !           202: PSZ   pDest, pSrc;
        !           203: unsigned wCount;
        !           204: {
        !           205:    for ( ; wCount--; *(pDest++) = *(pSrc++) );
        !           206: }
        !           207: 
        !           208: /*********************************************************************/
        !           209: /* CheckScrollBars -                                                 */
        !           210: /*    This routine shows or hides a scroll bar.                      */
        !           211: /*                                                                   */
        !           212: /*    Input: Accepts handle to frame window, id of scroll bar,       */
        !           213: /*           boolean indicating whether to show scroll bar.          */
        !           214: /*                                                                   */
        !           215: /*    Return: Whether scroll bar shown.                              */
        !           216: /*                                                                   */
        !           217: /* Notes: This routine utilizes the fact that the frame window       */
        !           218: /*    recognizes control windows only through the id of the          */
        !           219: /*    control window.  In order to hide a scroll window, all that    */
        !           220: /*    has to be done is to change the id of the scroll window,       */
        !           221: /*    disable the window for input, and repaint the frame.  This     */
        !           222: /*    is much easier (and faster) than creating and destroying       */
        !           223: /*    control windows.                                               */
        !           224: /*********************************************************************/
        !           225: 
        !           226: int      CheckScrollBars( hFrame, wScrollId, fShow )
        !           227: HWND     hFrame;
        !           228: unsigned wScrollId;
        !           229: int      fShow;
        !           230: {
        !           231:    HWND  hScroll;
        !           232: 
        !           233:    /* Attempt to get existing scroll Window */
        !           234:    hScroll = WinWindowFromID( hFrame, wScrollId );
        !           235: 
        !           236:    /* If scroll bar already the in desired state, return fShow */
        !           237:    if ((fShow && hScroll) || (!fShow && !hScroll))
        !           238:       return( fShow );
        !           239: 
        !           240:    if (fShow) {
        !           241:       /* If want to show scroll bar, get hidden one */
        !           242:       hScroll = WinWindowFromID( hFrame, wScrollId | HIDE_BIT );
        !           243: 
        !           244:       /* Mask off hidden bit */
        !           245:       WinSetWindowUShort( hScroll, QWS_ID, wScrollId & HIDE_MASK );
        !           246:    }
        !           247:    else
        !           248:       /* Otherwise hide existing bar by changing id */
        !           249:       WinSetWindowUShort( hScroll, QWS_ID, wScrollId | HIDE_BIT );
        !           250: 
        !           251:    /* Turn [on|off] mouse clicks to scroll bar, [hide|show] on screen */
        !           252:    WinEnableWindow( hScroll, fShow );
        !           253:    WinShowWindow( hScroll, fShow );
        !           254: 
        !           255:    /* Finally, send update frame message to let frame know something's up */
        !           256:    NewSendMsg( hFrame, WM_UPDATEFRAME, 
        !           257:               wScrollId == FID_HORZSCROLL ? FCF_HORZSCROLL : FCF_VERTSCROLL,
        !           258:                0L );
        !           259: 
        !           260:    return( fShow );
        !           261: }
        !           262: 
        !           263: 
        !           264: /*********************************************************************/
        !           265: /* DlgDirSelect -                                                    */
        !           266: /*    This routine gets current selection from a dialog box.         */
        !           267: /*                                                                   */
        !           268: /*    Input: Handle to dialog box, string to return selection in,    */
        !           269: /*           id of listbox.                                          */
        !           270: /*                                                                   */
        !           271: /*    Return: Whether selection was a directory. (TRUE)              */
        !           272: /*********************************************************************/
        !           273: 
        !           274: unsigned DlgDirSelect( hDlg, pString, nID )
        !           275: HWND     hDlg;
        !           276: PSZ      pString;
        !           277: unsigned nID;
        !           278: {
        !           279:    HWND     hList;
        !           280:    unsigned j;
        !           281: 
        !           282:    /* Get handle to the listbox */
        !           283:    hList = WinWindowFromID( hDlg, nID );
        !           284: 
        !           285:    /* Get current selection in j; read selection from listbox */
        !           286:    j = (unsigned) NewSendMsg( hList, LM_QUERYSELECTION, 0L, 0L );
        !           287:    NewSendMsg( hList, LM_QUERYITEMTEXT, 
        !           288:                MAKELONG( j, 64 ), (long) pString );
        !           289: 
        !           290:    /* Directories are enclosed in brackets */   
        !           291:    if (*pString == '[') {
        !           292:       /* If directory, strip brackets, return TRUE */
        !           293:       j = lstrlen( pString );
        !           294:       lmemcpy( pString, pString + 1, j );
        !           295:       pString[j - 2] = '\\';
        !           296:       pString[j - 1] = 0;
        !           297:       return( TRUE );
        !           298:    }
        !           299:    else
        !           300:       /* Normal file, return FALSE */
        !           301:       return( FALSE );
        !           302: }
        !           303: 
        !           304: /*********************************************************************/
        !           305: /* DlgDirList -                                                      */
        !           306: /*    This routine fills a list box with file names matching the     */
        !           307: /*    specification and possibly updates a static text field.        */
        !           308: /*                                                                   */
        !           309: /*    Input: Dialog box handle, file specification string, Id of     */
        !           310: /*           list box, id of static text field (maybe 0), and        */
        !           311: /*           attrib indicating type of files to list.                */
        !           312: /*                                                                   */
        !           313: /*    Return: fSuccess.                                              */
        !           314: /*                                                                   */
        !           315: /* Notes: Currently, this function has doesn't have the full         */
        !           316: /*    functionality of its Windows namesake.  If the path is too     */
        !           317: /*    long to fit in the static text field, it should be abbreviated */
        !           318: /*    with '...'.  Also, disk drives aren't listed.                  */
        !           319: /*********************************************************************/
        !           320: 
        !           321: int DlgDirList( hDlg, pInitPath, wListId, wIdStatic, wAttrib )
        !           322: HWND     hDlg;
        !           323: PSZ      pInitPath;
        !           324: unsigned wListId;
        !           325: unsigned wIdStatic;
        !           326: unsigned wAttrib;
        !           327: {
        !           328:    char  npTempBuf[MAX_PATH_LEN];   /* Temp location to hold path */
        !           329:    char  PathStr[MAX_PATH_LEN];     /* Used to build path */
        !           330:    PSZ   pPathStr = PathStr;        /* Pointer to path */
        !           331:    PSZ   pFileName;                 /* Pointer to File Name */
        !           332:    HWND  hList;                     /* Handle to list box */
        !           333: 
        !           334:    /* Copy string into Temp Buffer, this allows parsing routines  */
        !           335:    /*  to modify the string passed in. */
        !           336:    if (pInitPath == NULL)
        !           337:       npTempBuf[0] = 0;
        !           338:    else
        !           339:       lstrcpy( (PSZ) npTempBuf, pInitPath );
        !           340: 
        !           341:    /* Ensure path is legal and expand to full search path */
        !           342:    /* Stores full path in pPathStr */
        !           343:    pFileName = ParseFile( (PSZ) npTempBuf, pPathStr, FALSE );
        !           344:    if (pFileName == NULL)
        !           345:       return( FALSE );
        !           346: 
        !           347:    /* set current drive and path */
        !           348:    DosSelectDisk( *pPathStr - 'A' + 1 );
        !           349:    DosChdir( pPathStr, 0L );
        !           350: 
        !           351:    /* If static field, set text to be path */
        !           352:    /* Note: path should be abbreviated here! */
        !           353:    if (wIdStatic)
        !           354:       WinSetWindowText( WinWindowFromID( hDlg, wIdStatic ), 
        !           355:                         pPathStr );
        !           356: 
        !           357:    if (wListId) {
        !           358:       /* If list box present, get window */
        !           359:       hList = WinWindowFromID( hDlg, wListId );   
        !           360: 
        !           361:       /* Empty list boxes of any old entries */
        !           362:       NewSendMsg( hList, LM_DELETEALL, 0L, 0L );
        !           363: 
        !           364:       /* Fill them up with new entries */
        !           365:       return( FillListBox( hList, wAttrib, pFileName ) );
        !           366:    }
        !           367:    else
        !           368:       return( FALSE );
        !           369: }
        !           370: 
        !           371: 
        !           372: /*********************************************************************/
        !           373: /* FillListBox -                                                     */
        !           374: /*    This routine fills a list box with file names matching the     */
        !           375: /*    specification.                                                 */
        !           376: /*                                                                   */
        !           377: /*    Input: List box handle, file attribute, file wildcard          */
        !           378: /*           specification.                                          */
        !           379: /*                                                                   */
        !           380: /*    Return: fSuccess.                                              */
        !           381: /*                                                                   */
        !           382: /* Notes: This function should list disk drives.  When this funciton */
        !           383: /*    is called, the current drive and directory should be correct.  */
        !           384: /*********************************************************************/
        !           385: 
        !           386: int   FillListBox( hList, wAttrib, pFileSpec )
        !           387: HWND     hList;
        !           388: unsigned wAttrib;
        !           389: PSZ      pFileSpec;
        !           390: {
        !           391:    char        npTemp[30];
        !           392:    PSZ         pTemp = npTemp;
        !           393:    unsigned    wDir;
        !           394:    FILEFINDBUF ffb;
        !           395:    int         cFiles;
        !           396: 
        !           397:    /* Put files that match search spec in file listbox */
        !           398:    /* This is the standard list files loop */
        !           399:    cFiles = 1;
        !           400:    wDir = 0xffff;
        !           401:    if (!DosFindFirst( pFileSpec, (PHDIR) &wDir, wAttrib & 0x0f, &ffb, 
        !           402:                       sizeof ffb, &cFiles, 0L )) {
        !           403:       do {
        !           404:          NewSendMsg( hList, LM_INSERTITEM, 
        !           405:                      MAKELONG( 0, LIT_SORTASCENDING ), 
        !           406:                      (long) (PSZ) ffb.achName );
        !           407:          cFiles = 1;
        !           408:       } while (!DosFindNext( wDir, &ffb, sizeof ffb, &cFiles ));
        !           409:    }
        !           410: 
        !           411:    DosFindClose( wDir );
        !           412: 
        !           413:    /* Put directories in file listbox */
        !           414:    /* Standard list files loop with a twist - surround in brackets */
        !           415:    cFiles = 1;
        !           416:    wDir = 0xffff;
        !           417:    if (!DosFindFirst( "*", (PHDIR) &wDir, DIR_ATTRIBUTE, &ffb, 
        !           418:                       sizeof ffb, &cFiles, 0L )) {
        !           419:       do {
        !           420:          if (ffb.attrFile & DIR_ATTRIBUTE) {
        !           421:             /* Surround in brackets */
        !           422:             pTemp[0] = '[';
        !           423:             lmemcpy( pTemp + 1, (PSZ) &(ffb.achName[0]), ffb.cchName );
        !           424:             pTemp[ffb.cchName + 1] = ']';
        !           425:             pTemp[ffb.cchName + 2] = 0;
        !           426: 
        !           427:             NewSendMsg( hList, LM_INSERTITEM, 
        !           428:                         MAKELONG( 0, LIT_SORTASCENDING ), (long) pTemp );
        !           429:          }
        !           430:          cFiles = 1;
        !           431:       } while (!DosFindNext( wDir, &ffb, sizeof ffb, &cFiles ));
        !           432:    }
        !           433: 
        !           434:    DosFindClose( wDir );
        !           435: 
        !           436:    return TRUE;
        !           437: }
        !           438: 
        !           439: 
        !           440: /*********************************************************************/
        !           441: /* ParseFile -                                                       */
        !           442: /*    This routine parses a path/file specification obtaining a      */
        !           443: /*    complete path specifcation.                                    */
        !           444: /*                                                                   */
        !           445: /*    Input: Initial Path specification, Buffer to output path       */
        !           446: /*           path spec, Flag indicating whether to append file name  */
        !           447: /*           to path spec.                                           */
        !           448: /*                                                                   */
        !           449: /*    Return: Pointer to file name, NULL if couldn't parse.          */
        !           450: /*                                                                   */
        !           451: /* Notes: This function modifies the Initial path spec directly.     */
        !           452: /*    If there is a possibility that a calling function may receive  */
        !           453: /*    a constant string, it should copy the string constant to a     */
        !           454: /*    temp buffer before calling this routine.                       */
        !           455: /*********************************************************************/
        !           456: 
        !           457: PSZ   ParseFile( pSpec, pPath, fAppend )
        !           458: PSZ   pSpec;
        !           459: PSZ   pPath;
        !           460: BOOL  fAppend;
        !           461: {
        !           462:    char  TempChar;
        !           463:    PSZ   pBuf, pFile;
        !           464: 
        !           465:    /* Go past any path spec to first char in file name */
        !           466:    pFile = GetFileFromPath( pSpec );
        !           467: 
        !           468:    /* If path specification ends in '\' or ':', treat as if '*' was */
        !           469:    /* specified as the file name */
        !           470:    if (*pFile == 0) {
        !           471:       pFile++;
        !           472:       *pFile = '*';
        !           473:       *(pFile + 1) = 0;
        !           474:    }
        !           475: 
        !           476:    /* Save first char of file name, terminate path */
        !           477:    TempChar = *pFile;
        !           478:    *pFile = 0;
        !           479: 
        !           480:    /* If filename is path, i.e. no path was specified, use '.' as */
        !           481:    /* path, otherwise use current path specification */
        !           482:    if (pFile == pSpec)
        !           483:       pBuf = ".";
        !           484:    else
        !           485:       pBuf = pSpec;
        !           486: 
        !           487:    /* Call DosSearchPath.  This forms a complete path specification */
        !           488:    /* in addition to verifying the path */
        !           489:    if (DosSearchPath( 0, pBuf, (PSZ) "*", pPath, MAX_PATH_LEN )) {
        !           490:       *pPath = 0;
        !           491:       *pFile = TempChar;
        !           492:       return( NULL );
        !           493:    }
        !           494: 
        !           495:    /* DosSearchPath adds wildcard extensions after valid path.  Find */
        !           496:    /* first wildcard char, and end path there */
        !           497:    while (*pPath) {
        !           498:       if ((*pPath == '?') || (*pPath == '*')) {
        !           499:          *pPath = 0;
        !           500:          break;
        !           501:       }
        !           502:       pPath++;
        !           503:    }
        !           504: 
        !           505:    /* Restore first character in file name. */
        !           506:    *pFile = TempChar;
        !           507: 
        !           508:    /* Check if should append file name to path */
        !           509:    if (fAppend)
        !           510:       lstrcpy( pPath, pFile );
        !           511:    else {
        !           512:       /* If shouldn't then make sure path doesn't end in '\'.  The    */
        !           513:       /* only case where this is ok is for the root directory.  This  */
        !           514:       /* insures that DosChdir may be called on the returned path    */
        !           515:       pPath--;
        !           516:       if ((*pPath == '\\') && (*(pPath-1) != ':'))
        !           517:          *pPath = 0;   
        !           518:    }
        !           519: 
        !           520:    return( pFile );
        !           521: }      
        !           522:  
        !           523: 
        !           524: /*********************************************************************/
        !           525: /* GetFileFromPath -                                                 */
        !           526: /*    This routine finds the beginning of the file name in a path.
        !           527: /*                                                                   */
        !           528: /*    Input: Path specification.
        !           529: /*                                                                   */
        !           530: /*    Return: Pointer to file name.
        !           531: /*********************************************************************/
        !           532: 
        !           533: PSZ GetFileFromPath( pPath )
        !           534: PSZ pPath;
        !           535: {
        !           536:    int   j;
        !           537: 
        !           538:    j = lstrlen( pPath );
        !           539: 
        !           540:    /* Search backwards until find '\', ':' */
        !           541:    while (j--)
        !           542:       if (pPath[j] == '\\') {
        !           543:          /* Make sure path doesn't end in '\' */
        !           544:          pPath[j] = 0;
        !           545:          return( pPath + j + 1 );
        !           546:       }
        !           547:       else if (pPath[j] == ':')
        !           548:          return( pPath + j + 1 );
        !           549: 
        !           550:    return( pPath );
        !           551: }
        !           552: 
        !           553: 
        !           554: /*********************************************************************/
        !           555: /* OpenFile -                                                        */
        !           556: /*    This routine opens, closes, deletes files; parses filename.    */
        !           557: /*                                                                   */
        !           558: /*    Input: File specification, Open File structure, Flags          */
        !           559: /*           indicating what to do and where information is.         */
        !           560: /*                                                                   */
        !           561: /*    Return: File handle (0 if OF_PARSE) or -1 if error             */
        !           562: /*********************************************************************/
        !           563: 
        !           564: 
        !           565: /* These are constants used to specify the action taken in DosOpen */
        !           566: #define  OPEN_CALL         0x0001
        !           567: #define  CREATE_CALL       0x0012
        !           568: 
        !           569: int   OpenFile( pFileName, lpStruct, wCommand )
        !           570: PSZ         pFileName;
        !           571: LPOFSTRUCT  lpStruct;
        !           572: WORD        wCommand;
        !           573: {
        !           574:    char  npTempBuf[MAX_PATH_LEN];
        !           575:    PSZ   pFile = (PSZ) npTempBuf;
        !           576:    int   wOpenCode, wHandle, wAction;
        !           577: 
        !           578:    /* Copy file name to temp buf., may need to modify */
        !           579:    lstrcpy( pFile, pFileName );
        !           580: 
        !           581:    /* If OF_REOPEN, then assume that file name in buffer is correct */
        !           582:    /*  Otherwise, parse from pFileName to structure and return -1   */
        !           583:    /*  if error.  */
        !           584:    if (! (wCommand & OF_REOPEN))
        !           585:       if (!ParseFile( pFile, (PSZ) (lpStruct->szPathName), TRUE ))
        !           586:          return( -1 );
        !           587: 
        !           588:    /* If OF_PARSE, all done! */
        !           589:    if (wCommand & OF_PARSE) 
        !           590:       return( 0 );
        !           591: 
        !           592:    /* Set code indicating whether file should be opened or created */
        !           593:    wOpenCode = wCommand & OF_CREATE ? CREATE_CALL : OPEN_CALL;
        !           594: 
        !           595:    /* Either open or create file - even in the card of OF_DELETE, do */
        !           596:    /*  this to verify that file is accessible */
        !           597:    pFile = (PSZ) (lpStruct->szPathName);
        !           598:    if (DosOpen( pFile, (PHFILE) &wHandle, &wAction, 1L, 0, wOpenCode, 
        !           599:                 0xc2, 0L ) )
        !           600:       return( -1 );
        !           601: 
        !           602:    /* If OF_EXIST or OF_DELETE, don't keep file open */   
        !           603:    if (wCommand & (OF_EXIST | OF_DELETE)) {
        !           604:       DosClose( wHandle );
        !           605:       wHandle = 0;
        !           606:    }
        !           607: 
        !           608:    /* If OF_DELETE, get rid of file.  There shouldn't be an error if */
        !           609:    /*  this file was opened correctly */
        !           610:    if (wCommand & OF_DELETE)
        !           611:       DosDelete( pFile, 0L );
        !           612: 
        !           613:    return( wHandle );
        !           614: }
        !           615: 

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