зеркало из https://github.com/mozilla/gecko-dev.git
611 строки
15 KiB
C++
611 строки
15 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "stdafx.h"
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#include "apiapi.h" // get all global interfaces
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class CAPIList {
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protected:
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CAPIList * m_pNext;
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CAPIList * m_pPrevious;
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void * m_pData;
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public:
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CAPIList(void * pData = NULL);
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~CAPIList();
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long elements(void);
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CAPIList * Add(void * element);
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CAPIList * Remove(void * element);
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void * GetAt (int element);
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inline CAPIList * GetNext(void) {
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return m_pNext;
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}
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inline CAPIList * GetPrevious(void) {
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return m_pPrevious;
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}
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inline CAPIList * SetNext(CAPIList * pElement) {
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CAPIList * pNext = m_pNext;
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m_pNext = pElement;
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return pNext;
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}
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inline CAPIList * SetPrevious(CAPIList * pElement) {
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CAPIList * pPrevious = m_pPrevious;
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m_pPrevious = pElement;
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return pPrevious;
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}
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inline void * GetData(void) { return m_pData; }
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};
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CAPIList::CAPIList(void * pData)
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{
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m_pNext = NULL;
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m_pPrevious = NULL;
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SetNext(this);
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SetPrevious(this);
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m_pData = pData;
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}
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CAPIList::~CAPIList()
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{
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assert(m_pNext);
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assert(m_pPrevious);
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GetPrevious()->SetNext(GetNext());
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GetNext()->SetPrevious(GetPrevious());
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}
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CAPIList * CAPIList::Add(void * element)
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{
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CAPIList * pNode = new CAPIList(element);
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CAPIList * pOld = SetNext(pNode);
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pNode->SetNext(pOld);
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pOld->SetPrevious(pNode);
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pNode->SetPrevious(this);
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return pNode;
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}
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long CAPIList::elements(void)
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{
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CAPIList * pNode = this;
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long lcount = 0;
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do {
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lcount++;
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pNode = pNode->GetNext();
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} while (pNode != this);
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return lcount;
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}
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CAPIList * CAPIList::Remove(void * element)
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{
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BOOL found = FALSE;
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CAPIList * pNode = this;
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do {
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if (pNode->GetData() == element) {
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found = TRUE;
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break;
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}
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pNode = pNode->GetNext();
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} while (pNode != this);
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if (found) {
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if (GetNext() == this) {
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delete this;
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return NULL;
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}
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else {
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CAPIList * ptr = pNode->GetPrevious();
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delete pNode;
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return ptr;
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}
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}
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return this;
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}
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void * CAPIList::GetAt ( int element )
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{
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CAPIList * pNode = this;
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do {
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if (!element)
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return pNode->GetData();
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element--;
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pNode = pNode->GetNext();
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} while (pNode != this);
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return NULL;
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}
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// the API repository implements the APIAPI interface and maintains
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// the list of APIs, their IDs, and reference counts.
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class ApiEntry {
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protected:
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LPUNKNOWN m_pUnk;
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APISIGNATURE m_apiSig;
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public:
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ApiEntry(LPUNKNOWN pUnk = NULL, APISIGNATURE apiSig = NULL ) {
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m_pUnk =pUnk;
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m_apiSig = apiSig;
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}
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inline LPUNKNOWN GetUnk() { return m_pUnk; }
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inline APISIGNATURE GetSig() { return m_apiSig; }
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inline void SetSig(APISIGNATURE apiSig) { m_apiSig = apiSig; }
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inline void SetUnk(LPUNKNOWN pUnk) { m_pUnk = pUnk; }
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};
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class ClassFactory { // class factory entries
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public:
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LPCLASSFACTORY m_pClassFactory; // class instance creation factory
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char * m_pszClassName; // name of class
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BOOL m_bIsLoaded; // is class factory loaded?
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char * m_pszModuleName; // module containing class factory
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HMODULE m_hModule; // factory dll instance
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CAPIList * m_ApiList; // list of api instances
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ClassFactory (char * pszClassName, LPCLASSFACTORY pFactory, char * pszModule = 0 );
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~ClassFactory();
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LPUNKNOWN CreateClassInstance(LPUNKNOWN pUnkOuter, APISIGNATURE apiSig = NULL);
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LPUNKNOWN GetFirst(void);
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LPUNKNOWN GetNext(LPUNKNOWN);
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void Insert(LPUNKNOWN pUnk,APISIGNATURE apiSig = NULL);
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void Remove(LPUNKNOWN);
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LPUNKNOWN LocateBySignature(APISIGNATURE);
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BOOL AttemptToLoad(void);
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};
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void ClassFactory::Insert(
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LPUNKNOWN pUnk,
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APISIGNATURE apiSig
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)
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{
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if (!m_ApiList) {
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m_ApiList = new CAPIList((void*)(new ApiEntry(pUnk,apiSig)));
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}
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else {
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m_ApiList = m_ApiList->Add((void*)(new ApiEntry(pUnk,apiSig)));
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}
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}
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void ClassFactory::Remove(LPUNKNOWN pUnk)
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{
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if (m_ApiList) {
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ApiEntry * pEntry;
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for (int i = 0; i < m_ApiList->elements(); i++) {
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pEntry = (ApiEntry *)m_ApiList->GetAt(i);
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assert(pEntry);
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if (pEntry->GetUnk() == pUnk) {
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m_ApiList = m_ApiList->Remove((void*)pEntry);
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delete pEntry;
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return;
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}
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}
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}
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}
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LPUNKNOWN ClassFactory::GetFirst(void)
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{
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if (!m_ApiList)
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return 0;
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if (!m_ApiList->elements())
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return 0;
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return ((ApiEntry *)(m_ApiList->GetAt(0)))->GetUnk();
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}
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LPUNKNOWN ClassFactory::GetNext(LPUNKNOWN pUnk)
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{
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if (m_ApiList) {
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for (int i = 0; i < m_ApiList->elements() - 1; i++)
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if (((ApiEntry*)m_ApiList->GetAt(i))->GetUnk() == (void*)pUnk)
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return ((ApiEntry*)m_ApiList->GetAt(i+1))->GetUnk();
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}
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return 0;
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}
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LPUNKNOWN ClassFactory::LocateBySignature(APISIGNATURE apiSig)
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{
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if (!apiSig || !m_ApiList)
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return NULL;
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ApiEntry * pEntry;
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for (int i = 0; i < m_ApiList->elements(); i++) {
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pEntry = (ApiEntry*)m_ApiList->GetAt(i);
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if (APISIGCMP(pEntry->GetSig(),apiSig))
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return pEntry->GetUnk();
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}
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return NULL;
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}
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ClassFactory::ClassFactory(char * pszClassName, LPCLASSFACTORY pFactory, char * pszModule)
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{
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assert(pszClassName);
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m_pClassFactory = pFactory;
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m_pszClassName = strdup(pszClassName);
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m_hModule = NULL;
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m_ApiList = NULL;
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if (pszModule != 0) {
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m_pszModuleName = strdup(pszModule);
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m_bIsLoaded = FALSE;
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}
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else {
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m_bIsLoaded = TRUE;
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m_pszModuleName = NULL;
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}
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}
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ClassFactory::~ClassFactory()
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{
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if (m_pszClassName != NULL)
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free (m_pszClassName);
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if (m_pszModuleName != NULL)
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free (m_pszModuleName);
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if (m_hModule != NULL)
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FreeLibrary(m_hModule);
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int elements;
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elements = m_ApiList ? (int)m_ApiList->elements( ): 0;
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while ( elements ) {
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ApiEntry * pEntry = (ApiEntry *)m_ApiList->GetAt(elements - 1);
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assert(pEntry);
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LPUNKNOWN entry = (LPUNKNOWN)pEntry->GetUnk();
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// FIXME release objects here!
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if (entry)
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while (entry->Release())
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;
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delete pEntry;
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elements--;
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}
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}
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LPUNKNOWN ClassFactory::CreateClassInstance(
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LPUNKNOWN pUnkOuter,
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APISIGNATURE apiSig)
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{
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assert(m_pClassFactory);
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LPUNKNOWN pUnknown;
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if (m_pClassFactory->CreateInstance(
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pUnkOuter, IID_IUnknown, (LPVOID*)&pUnknown) == NOERROR)
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Insert(pUnknown,apiSig);
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return pUnknown;
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}
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class ClassRepository : public CGenericFactory,
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public IApiapi {
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protected:
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ULONG m_ulRefCount;
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CAPIList * m_ClassList;
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// lookup attempts to find an API entry based on id
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ClassFactory * Lookup (char * pszClassName);
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ClassFactory * GetFirst(void);
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ClassFactory * GetNext(ClassFactory *);
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void Remove(ClassFactory*);
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public:
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ClassRepository ( );
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~ClassRepository ( );
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// IClassFactory Interface
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STDMETHODIMP CreateInstance(LPUNKNOWN,REFIID,LPVOID*);
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// IApiapi interface
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LPUNKNOWN GetFirstInstance(APICLASS lpszClassName);
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LPUNKNOWN GetNextInstance(APICLASS lpszClassName, LPUNKNOWN pUnk );
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void * GetFirstApiInstance( REFIID refiid, LPUNKNOWN * ppUnk);
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int RemoveInstance( LPUNKNOWN pUnk );
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LPUNKNOWN CreateClassInstance (
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APICLASS lpszClassName,LPUNKNOWN pUnkOuter,APISIGNATURE apiSig);
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int RegisterClassFactory (
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APICLASS lpszClassName, LPCLASSFACTORY pClassFactory, char * szModuleName = 0);
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};
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ClassRepository::ClassRepository ( )
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{
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m_ClassList = NULL;
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RegisterClassFactory(APICLASS_APIAPI,(LPCLASSFACTORY)this);
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}
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ClassRepository::~ClassRepository ( )
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{
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if (m_ClassList) {
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int elements = (int)m_ClassList->elements( );
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while ( elements ) {
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elements--;
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}
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}
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}
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STDMETHODIMP ClassRepository::CreateInstance(
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LPUNKNOWN pUnkOuter,REFIID refiid, LPVOID * ppvObj)
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{
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*ppvObj = NULL;
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ClassRepository * pRepository = new ClassRepository;
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return pRepository->QueryInterface(refiid,ppvObj);
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}
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int ClassRepository::RemoveInstance( LPUNKNOWN pUnk )
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{
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if (m_ClassList) {
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int elements = (int) m_ClassList->elements();
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int i;
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for ( i = 0; i < elements; i++ ) {
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ClassFactory * entry = (ClassFactory *)m_ClassList->GetAt(i);
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entry->Remove(pUnk);
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}
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}
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return 0;
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}
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ClassFactory * ClassRepository::GetFirst(void)
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{
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if (!m_ClassList)
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return 0;
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if (!m_ClassList->elements())
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return 0;
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return (ClassFactory *)m_ClassList->GetAt(0);
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}
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ClassFactory * ClassRepository::GetNext(ClassFactory * pFactory)
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{
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if (m_ClassList) {
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for (int i = 0; i < m_ClassList->elements() - 1; i++)
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if (m_ClassList->GetAt(i) == (void*)pFactory)
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return (ClassFactory *)m_ClassList->GetAt(i+1);
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}
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return 0;
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}
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void ClassRepository::Remove(ClassFactory * pFactory)
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{
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if (m_ClassList)
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m_ClassList = m_ClassList->Remove((void*)pFactory);
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}
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LPUNKNOWN ClassRepository::CreateClassInstance(
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APICLASS lpszClassName,
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LPUNKNOWN pUnkOuter,
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APISIGNATURE apiSig )
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{
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ClassFactory * pFactory = Lookup(lpszClassName);
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if (pFactory) {
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if (apiSig) {
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LPUNKNOWN pUnk;
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if ((pUnk = pFactory->LocateBySignature(apiSig)) != NULL)
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return pUnk;
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}
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return pFactory->CreateClassInstance(pUnkOuter,apiSig);
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}
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return NULL;
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}
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BOOL ClassFactory::AttemptToLoad(void)
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{
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if ((!m_pszModuleName) || m_bIsLoaded)
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return FALSE;
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// attempt to load the interface module (DLL)
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m_hModule = LoadLibrary (m_pszModuleName);
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if (m_hModule > (HMODULE)32) {
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// The class factory initializer is the first routine in the DLL.
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APIBOOTER fpApiInitialize =
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(APIBOOTER)GetProcAddress(m_hModule,MAKEINTRESOURCE(1));
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// if we got a valid initializer, then call it with the
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// class name. This was the module can initialize one at
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// a time if it likes.
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if (fpApiInitialize != NULL ) {
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m_bIsLoaded = TRUE;
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if ((*fpApiInitialize)(m_pszClassName))
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return TRUE;
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}
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else
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m_bIsLoaded = FALSE;
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}
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else {
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// couldn't load the module
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char szMessage[1024];
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sprintf ( szMessage, "Cannot load module: %.800s\nClass factory %800s",
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m_pszModuleName, m_pszClassName);
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MessageBox ( 0, szMessage, "Interface Error", MB_OK | MB_ICONEXCLAMATION );
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}
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return FALSE;
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}
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ClassFactory * ClassRepository::Lookup ( char * pszClassName )
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{
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// get the number of stored elements
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if (m_ClassList) {
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int elements = (int) m_ClassList->elements();
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int i;
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// look up the api
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for ( i = 0; i < elements; i++ ) {
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ClassFactory * entry = (ClassFactory *)m_ClassList->GetAt(i);
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if (!stricmp(entry->m_pszClassName, pszClassName)) {
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if (!entry->m_bIsLoaded)
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if (entry->AttemptToLoad())
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return entry;
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else
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return 0;
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return entry;
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}
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}
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}
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return 0;
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}
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int ClassRepository::RegisterClassFactory (
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char * pszClassName,
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LPCLASSFACTORY pClassFactory,
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char * szModuleName )
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{
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ClassFactory * pClassEntry;
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if ((pClassEntry = Lookup (pszClassName)) != 0) {
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pClassEntry->m_pClassFactory = pClassFactory;
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return 1;
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}
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else {
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pClassEntry = new ClassFactory ( pszClassName, pClassFactory, szModuleName);
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if (!m_ClassList)
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m_ClassList = new CAPIList((void*)pClassEntry);
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else
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m_ClassList = m_ClassList->Add ((void*)pClassEntry );
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}
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return 0;
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}
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void * ClassRepository::GetFirstApiInstance( REFIID refiid, LPUNKNOWN * ppUnk)
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{
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void * pSomeInterface;
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*ppUnk = 0;
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ClassFactory * pClass = GetFirst();
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while (pClass) {
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LPUNKNOWN pUnk = pClass->GetFirst();
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while (pUnk) {
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if (pUnk->QueryInterface(refiid,(LPVOID*)&pSomeInterface) == NOERROR) {
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*ppUnk = pUnk;
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return pSomeInterface;
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}
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pUnk = pClass->GetNext(pUnk);
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}
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pClass = GetNext(pClass);
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}
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return NULL;
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}
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// function looks up an API by id and returns a void pointer which in
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// turn can be cast to the requested interface type. This is done
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// for you by the Api<id,interf> template.
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LPUNKNOWN ClassRepository::GetFirstInstance ( char * pszClassName )
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{
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if (m_ClassList) {
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for (int i = 0; i < m_ClassList->elements(); i++) {
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ClassFactory * pClassFactory = (ClassFactory *)m_ClassList->GetAt(i);
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if (!stricmp(pClassFactory->m_pszClassName, pszClassName)) {
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if (pClassFactory->m_ApiList)
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return ((ApiEntry*)pClassFactory->m_ApiList->GetAt(0))->GetUnk();
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return NULL;
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}
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}
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}
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return NULL;
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}
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LPUNKNOWN ClassRepository::GetNextInstance ( char * pszClassName, LPUNKNOWN pUnk )
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{
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if (m_ClassList) {
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for (int i = 0; i < m_ClassList->elements(); i++) {
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ClassFactory * pClassFactory = (ClassFactory *)m_ClassList->GetAt(i);
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if (!stricmp(pClassFactory->m_pszClassName, pszClassName)) {
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CAPIList * pList = pClassFactory->m_ApiList;
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if (pList)
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for (int j = 0; j<pList->elements()-1; j++)
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if (((ApiEntry*)pList->GetAt(j))->GetUnk() == pUnk)
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return ((ApiEntry*) pClassFactory->m_ApiList->GetAt(j+1))->GetUnk();
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return NULL;
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}
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}
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}
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return NULL;
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}
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// The apiapi object MUST be constructed first, this pragma ensures that
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// the static constructor will occur before any other static construction
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// happens.
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#pragma warning( disable : 4074 )
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#pragma init_seg(compiler)
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static ClassRepository classRepository;
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// global function gets the ApiApi from the static repository
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// From here, all registered APIs can be retrieved and set
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|
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API_PUBLIC(LPAPIAPI) GetAPIAPI()
|
|
{
|
|
return (LPAPIAPI) &classRepository;
|
|
}
|
|
|
|
// Generic Objects
|
|
// Generic Factory
|
|
|
|
|
|
STDMETHODIMP CGenericFactory::QueryInterface(REFIID refiid, LPVOID * ppv)
|
|
{
|
|
*ppv = NULL;
|
|
if (IsEqualIID(refiid,IID_IUnknown))
|
|
*ppv = (LPUNKNOWN) this;
|
|
else if (IsEqualIID(refiid,IID_IClassFactory))
|
|
*ppv = (LPCLASSFACTORY) this;
|
|
|
|
if (*ppv != NULL) {
|
|
AddRef();
|
|
return NOERROR;
|
|
}
|
|
|
|
return ResultFromScode(E_NOINTERFACE);
|
|
}
|
|
|
|
STDMETHODIMP_(ULONG) CGenericFactory::AddRef(void)
|
|
{
|
|
return ++m_ulRefCount;
|
|
}
|
|
|
|
STDMETHODIMP_(ULONG) CGenericFactory::Release(void)
|
|
{
|
|
ULONG ulRef;
|
|
ulRef = --m_ulRefCount;
|
|
if (m_ulRefCount == 0) ;
|
|
// delete this;
|
|
return ulRef;
|
|
}
|
|
|
|
STDMETHODIMP CGenericFactory::CreateInstance(
|
|
LPUNKNOWN pUnkOuter,REFIID refiid, LPVOID * ppvObj)
|
|
{
|
|
return NULL;
|
|
// User Implemented
|
|
}
|
|
|
|
STDMETHODIMP CGenericFactory::LockServer(BOOL fLock)
|
|
{
|
|
return NOERROR;
|
|
}
|
|
|
|
// Generic Object
|
|
|
|
STDMETHODIMP CGenericObject::QueryInterface(REFIID refiid, LPVOID * ppv)
|
|
{
|
|
return ResultFromScode(E_NOINTERFACE);
|
|
}
|
|
|
|
STDMETHODIMP_(ULONG) CGenericObject::AddRef(void)
|
|
{
|
|
return ++m_ulRefCount;
|
|
}
|
|
|
|
STDMETHODIMP_(ULONG) CGenericObject::Release(void)
|
|
{
|
|
ULONG ulRef;
|
|
ulRef = --m_ulRefCount;
|
|
if (m_ulRefCount == 0) {
|
|
classRepository.RemoveInstance(this);
|
|
delete this;
|
|
}
|
|
return ulRef;
|
|
}
|
|
|