windows-nt/Source/XPSP1/NT/net/dhcp/server/mm/optclass.c

//================================================================================
// Copyright (C) 1997 Microsoft Corporation
// Author: RameshV
// Description: implements the basic structures for options, including class id
// ThreadSafe: no
// Locks: none
// Please read stdinfo.txt for programming style.
//================================================================================
#include <mm.h>
#include <array.h>
#include <opt.h>
#include <optl.h>

//BeginExport(typedef)
typedef struct _M_ONECLASS_OPTLIST {
    DWORD                          ClassId;
    DWORD                          VendorId;
    M_OPTLIST                      OptList;
} M_ONECLASS_OPTLIST, *PM_ONECLASS_OPTLIST, *LPM_ONECLASS_OPTLIST;

typedef struct _M_OPTCLASS {
    ARRAY                          Array;
} M_OPTCLASS, *PM_OPTCLASS, *LPM_OPTCLASS;
//EndExport(typedef)

//BeginExport(inline)
DWORD       _inline
MemOptClassInit(
    IN OUT  PM_OPTCLASS            OptClass
) {
    return MemArrayInit(&OptClass->Array);
}
//EndExport(inline)

//BeginExport(inline)
DWORD       _inline
MemOptClassCleanup(
    IN OUT  PM_OPTCLASS            OptClass
) {
    // Bump down refcounts?
    return MemArrayCleanup(&OptClass->Array);
}
//EndExport(inline)

//BeginExport(function)
MemOptClassFindClassOptions(                      // find options for one particular class
    IN OUT  PM_OPTCLASS            OptClass,
    IN      DWORD                  ClassId,
    IN      DWORD                  VendorId,
    OUT     PM_OPTLIST            *OptList
) //EndExport(function)
{
    ARRAY_LOCATION                 Location;
    PM_ONECLASS_OPTLIST            ThisOptList;
    DWORD                          Error;

    AssertRet(OptClass && OptList, ERROR_INVALID_PARAMETER);

    for( Error = MemArrayInitLoc(&OptClass->Array, &Location)
         ; ERROR_FILE_NOT_FOUND != Error ;
         Error = MemArrayNextLoc(&OptClass->Array, &Location)
    ) {
        Require(ERROR_SUCCESS == Error);

        Error = MemArrayGetElement(
            &OptClass->Array,
            &Location,
            (LPVOID*)&ThisOptList
        );
        Require(ERROR_SUCCESS == Error && ThisOptList);

        if( ThisOptList->ClassId == ClassId &&
            ThisOptList->VendorId == VendorId ) {
            *OptList = &ThisOptList->OptList;
            return ERROR_SUCCESS;
        }
    }
    *OptList = NULL;
    return ERROR_FILE_NOT_FOUND;
}

//BeginExport(function)
DWORD
MemOptClassAddOption(
    IN OUT  PM_OPTCLASS            OptClass,
    IN      PM_OPTION              Opt,
    IN      DWORD                  ClassId,
    IN      DWORD                  VendorId,
    OUT     PM_OPTION             *DeletedOpt
) //EndExport(function)
{
    DWORD                          Error;
    PM_OPTLIST                     ThisOptList;
    PM_ONECLASS_OPTLIST            ThisOneOptList;

    AssertRet(OptClass && Opt && DeletedOpt, ERROR_INVALID_PARAMETER);

    ThisOneOptList = NULL;
    (*DeletedOpt) = NULL;

    Error = MemOptClassFindClassOptions(OptClass,ClassId,VendorId,&ThisOptList);
    if( ERROR_SUCCESS != Error ) {
        ThisOneOptList = MemAlloc(sizeof(*ThisOneOptList));
        if( NULL == ThisOneOptList ) return ERROR_NOT_ENOUGH_MEMORY;

        // RefCount on ClassId has to go up?
        ThisOneOptList->ClassId = ClassId;
        ThisOneOptList->VendorId = VendorId;
        Error = MemOptListInit(&ThisOneOptList->OptList);
        if( ERROR_SUCCESS != Error ) {
            MemFree(ThisOneOptList);
            return Error;
        }

        Error = MemArrayAddElement(&OptClass->Array, ThisOneOptList);
        if( ERROR_SUCCESS != Error ) {
            MemFree(ThisOneOptList);
            return Error;
        }

        ThisOptList = &ThisOneOptList->OptList;
    }

    Error = MemOptListAddOption(ThisOptList, Opt, DeletedOpt);

    return Error;
}


//================================================================================
// end of file
//================================================================================