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Annotation of ntddk/src/print/lib/mapfile.c, revision 1.1

1.1     ! root        1: //--------------------------------------------------------------------------
        !             2: //
        !             3: // Module Name:  MAPFILE.C
        !             4: //
        !             5: // Brief Description:  This module contains the PSCRIPT driver's MapFile
        !             6: // routine.
        !             7: //
        !             8: // Author:  Kent Settle (kentse)
        !             9: // Created: 05-Nov-1991
        !            10: //
        !            11: // Copyright (c) 1991 - 1992 Microsoft Corporation
        !            12: //--------------------------------------------------------------------------
        !            13: 
        !            14: #include "stddef.h"
        !            15: #include "windows.h"
        !            16: #include "winddi.h"
        !            17: #include "libproto.h"
        !            18: 
        !            19: //--------------------------------------------------------------------------
        !            20: // PVOID MapFile(pwstr)
        !            21: // PWSTR        pwstr;
        !            22: //
        !            23: // Returns a pointer to the mapped file defined by pwstr.
        !            24: //
        !            25: // Parameters:
        !            26: //   pwstr   UNICODE string containing fully qualified pathname of the
        !            27: //           file to map.
        !            28: //
        !            29: // Returns:
        !            30: //   Pointer to mapped memory if success, NULL if error.
        !            31: //
        !            32: // NOTE:  UnmapViewOfFile will have to be called by the user at some
        !            33: //        point to free up this allocation.
        !            34: //
        !            35: // History:
        !            36: //  15:08 on Thu 27 Feb 1992    -by-    Lindsay Harris   [lindsayh]
        !            37: //      Change PWSZ -> pwstr {Preferred type for Unicode stuff}
        !            38: //
        !            39: //   05-Nov-1991    -by-    Kent Settle     [kentse]
        !            40: // Wrote it.
        !            41: //--------------------------------------------------------------------------
        !            42: 
        !            43: PVOID MapFile(pwstr)
        !            44: PWSTR   pwstr;
        !            45: {
        !            46:     PVOID   pv;
        !            47:     HANDLE  hFile, hFileMap;
        !            48: 
        !            49:     // open the file we are interested in mapping.
        !            50: 
        !            51:     if ((hFile = CreateFileW(pwstr, GENERIC_READ, FILE_SHARE_READ,
        !            52:                              NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
        !            53:                              NULL)) == INVALID_HANDLE_VALUE)
        !            54:     {
        !            55:         RIP("MapFile: CreateFileW failed.\n");
        !            56:         return((PVOID)NULL);
        !            57:     }
        !            58: 
        !            59:     // create the mapping object.
        !            60: 
        !            61:     if (!(hFileMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY,
        !            62:                                         0, 0, (PWSTR)NULL)))
        !            63:     {
        !            64:         RIP("MapFile: CreateFileMapping failed.\n");
        !            65:         return((PVOID)NULL);
        !            66:     }
        !            67: 
        !            68:     // get the pointer mapped to the desired file.
        !            69: 
        !            70:     if (!(pv = (PVOID)MapViewOfFile(hFileMap, FILE_MAP_READ, 0, 0, 0)))
        !            71:     {
        !            72:         RIP("MapFile: MapViewOfFile failed.\n");
        !            73:         return((PVOID)NULL);
        !            74:     }
        !            75: 
        !            76:     // now that we have our pointer, we can close the file and the
        !            77:     // mapping object.
        !            78: 
        !            79:     if (!CloseHandle(hFileMap))
        !            80:         RIP("MapFile: CloseHandle(hFileMap) failed.\n");
        !            81: 
        !            82:     if (!CloseHandle(hFile))
        !            83:         RIP("MapFile: CloseHandle(hFile) failed.\n");
        !            84: 
        !            85:     return(pv);
        !            86: }

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