windows-server-2003/inetcore/urlmon/download/clist.cxx

//*********************************************************************
//*                  Microsoft Windows                               **
//*            Copyright(c) Microsoft Corp., 1995                    **
//*********************************************************************

//
//  CLIST.CPP
//

//  HISTORY:
//  
//  9/10/95     philco      Created.
//  4/05/96     VatsanP     Copied from MSHTML to URLMON\DOWNLOAD
//                          to use for the code downloader
//                          changed name to CLIST.CXX to make JoahnnP happy :)
//

//
//  Templated list class "borrowed" from MFC 3.0.  Used to manage a
//  list of IOleObject pointers to embedded items.
//

#include <cdlpch.h>
#ifndef unix
#include "..\inc\clist.hxx"
#else
#include "../inc/clist.hxx"
#endif /* unix */

BOOL AFXAPI AfxIsValidAddress(const void* lp, UINT nBytes, BOOL bReadWrite)
{
    DEBUG_ENTER((DBG_DOWNLOAD,
                Bool,
                "AfxIsValidAddress",
                "%#x, %x, %B",
                lp, nBytes, bReadWrite
                ));
                
    // simple version using Win-32 APIs for pointer validation.
    BOOL bRet = (lp != NULL && !IsBadReadPtr(lp, nBytes) &&
                    (!bReadWrite || !IsBadWritePtr((LPVOID)lp, nBytes)));

    DEBUG_LEAVE(bRet);
    return bRet;
}

CPlex* PASCAL CPlex::Create(CPlex*& pHead, UINT nMax, UINT cbElement)
{
    DEBUG_ENTER((DBG_DOWNLOAD,
                Pointer,
                "CPlex::Create",
                "%#x, %x, %x",
                &pHead, nMax, cbElement
                ));
                
    ASSERT(nMax > 0 && cbElement > 0);


    CPlex* p = (CPlex*) new (BYTE[sizeof(CPlex) + nMax* cbElement]);
            // may throw exception
           
    Assert(p != NULL);
    
    p->nMax = nMax;
    p->nCur = 0;
    p->pNext = pHead;
    pHead = p;  // change head (adds in reverse order for simplicity)

    DEBUG_LEAVE(p);
    return p;
}

void CPlex::FreeDataChain()     // free this one and links
{
    DEBUG_ENTER((DBG_DOWNLOAD,
                None,
                "CPlex::FreeDataChain",
                "this=%#x",
                this
                ));
                
    CPlex* p = this;
    while (p != NULL)
    {
        BYTE* bytes = (BYTE*) p;
        CPlex* pNext = p->pNext;
        delete (bytes);
        p = pNext;
    }

    DEBUG_LEAVE(0);
}