windows-server-2003/printscan/print/drivers/usermode/gpdres/epageres/common.c

/*++

Copyright (c) 1996-1998  Microsoft Corporation

Module Name:

    main.c

Abstract:

    Implementation of OEMGetInfo and OEMDevMode.
    Shared by all Unidrv OEM test dll's.

Environment:

    Windows NT Unidrv driver

Revision History:

    04/07/97 -zhanw-
        Created it.

--*/

#include "pdev.h"       // defined in sub-directory such as DDICMDCB, FONTCB, etc.

DWORD gdwDrvMemPoolTag = 'meoD';    // lib.h requires this global var, for debugging

////////////////////////////////////////////////////////
//      INTERNAL PROTOTYPES
////////////////////////////////////////////////////////

BOOL APIENTRY OEMGetInfo(DWORD dwInfo, PVOID pBuffer, DWORD cbSize, PDWORD pcbNeeded)
{
    LPCSTR OEM_INFO[] = {   "Bad Index",
                            "OEMGI_GETSIGNATURE",
                            "OEMGI_GETINTERFACEVERSION",
                            "OEMGI_GETVERSION",
                        };

    VERBOSE((DLLTEXT("OEMGetInfo(%s) entry.\n"), OEM_INFO[dwInfo]));

    // Validate parameters.
    if( ( (OEMGI_GETSIGNATURE != dwInfo) &&
          (OEMGI_GETINTERFACEVERSION != dwInfo) &&
          (OEMGI_GETVERSION != dwInfo) ) ||
        (NULL == pcbNeeded)
      )
    {
        ERR(("OEMGetInfo() ERROR_INVALID_PARAMETER.\r\n"));

        // Did not write any bytes.
        if(NULL != pcbNeeded)
                *pcbNeeded = 0;

        return FALSE;
    }

    // Need/wrote 4 bytes.
    *pcbNeeded = 4;

    // Validate buffer size.  Minimum size is four bytes.
    if( (NULL == pBuffer) || (4 > cbSize) )
    {
        ERR(("OEMGetInfo() ERROR_INSUFFICIENT_BUFFER.\r\n"));

        return FALSE;
    }

    // Write information to buffer.
    switch(dwInfo)
    {
    case OEMGI_GETSIGNATURE:
        *(LPDWORD)pBuffer = OEM_SIGNATURE;
        break;

    case OEMGI_GETINTERFACEVERSION:
        *(LPDWORD)pBuffer = PRINTER_OEMINTF_VERSION;
        break;

    case OEMGI_GETVERSION:
        *(LPDWORD)pBuffer = OEM_VERSION;
        break;
    }

    return TRUE;
}