Computer Shopper 275/DPCS0111DVD.ISO/Toolkit/Audio-Visual/VirtualDub/Source/VirtualDub-1.9.10-src.7z/src/h/vd2/system/VDNamespace.h

C/C++ Source or Header | 2009-09-14 | 5.4 KB | 158 lines

//    VirtualDub - Video processing and capture application
//    System library component
//    Copyright (C) 1998-2004 Avery Lee, All Rights Reserved.
//
//    Beginning with 1.6.0, the VirtualDub system library is licensed
//    differently than the remainder of VirtualDub.  This particular file is
//    thus licensed as follows (the "zlib" license):
//
//    This software is provided 'as-is', without any express or implied
//    warranty.  In no event will the authors be held liable for any
//    damages arising from the use of this software.
//
//    Permission is granted to anyone to use this software for any purpose,
//    including commercial applications, and to alter it and redistribute it
//    freely, subject to the following restrictions:
//
//    1.    The origin of this software must not be misrepresented; you must
//        not claim that you wrote the original software. If you use this
//        software in a product, an acknowledgment in the product
//        documentation would be appreciated but is not required.
//    2.    Altered source versions must be plainly marked as such, and must
//        not be misrepresented as being the original software.
//    3.    This notice may not be removed or altered from any source
//        distribution.
#ifndef f_SYSTEM_VDNAMESPACE_H
#define f_SYSTEM_VDNAMESPACE_H

#include <vd2/system/list.h>

class VDNamespaceNode;
class VDNamespaceGroup;
class VDNamespaceItem;
class VDNamespace;
template <class T> class VDNamespace2;

///////////////////////////////////////////////////////////////////////////
//
// Node: Any item in the namespace.
//
///////////////////////////////////////////////////////////////////////////

class VDNamespaceNode {
public:
    const char *pszName;
    VDNamespaceGroup *const pParent;

    VDNamespaceNode(const char *name, VDNamespaceGroup *parent) : pszName(name), pParent(parent) {    }
};

///////////////////////////////////////////////////////////////////////////
//
// Group: Holds items.
//
///////////////////////////////////////////////////////////////////////////

class VDNamespaceGroup : public VDNamespaceNode, public ListNode2<VDNamespaceGroup> {
public:
    ListAlloc<VDNamespaceItem> listItems;
    ListAlloc<VDNamespaceGroup> listGroups;

    const char *namedup(const char *s);

    VDNamespaceGroup(const char *_pszName, VDNamespaceGroup *parent);
    ~VDNamespaceGroup();
};

///////////////////////////////////////////////////////////////////////////
//
// Item class
//
///////////////////////////////////////////////////////////////////////////

class VDNamespaceItem : public VDNamespaceNode, public ListNode2<VDNamespaceItem> {
public:
    const void *object;

    VDNamespaceItem(const char *_pszName, VDNamespaceGroup *parent, const void *src);
    ~VDNamespaceItem();
};

///////////////////////////////////////////////////////////////////////////
//
// Namespace class
//
///////////////////////////////////////////////////////////////////////////

class VDNamespace {
protected:
    VDNamespaceGroup root;

    VDNamespaceGroup *_lookupGroup(const char *pszName, bool fCreate, bool fIsFilter);
    VDNamespaceItem *_findItemByObject(const VDNamespaceGroup *pGroup, const void *pObj);
    bool _getPathByItem(const VDNamespaceNode *pEntry, char *buf, int maxlen);

public:

    VDNamespace();
    ~VDNamespace();

    typedef bool (*tGroupEnumerator)(VDNamespace *pThis, const char *pszName, const VDNamespaceGroup *pGroup, void *pvData);
    typedef bool (*tItemEnumerator)(VDNamespace *pThis, const char *pszName, const void *pItem, void *pvData);

    void clear();
    void add(const char *pszGroup, const char *pszName, const void *pDef);
    const void *lookup(const char *pszName);

    bool enumerateGroups(const VDNamespaceGroup *pGroupRoot, tGroupEnumerator pEnum, void *pvData);
    bool enumerateItems(const VDNamespaceGroup *pGroupRoot, tItemEnumerator pEnum, void *pvData);

    bool getPathByItem(const void *pObj, char *buf, int maxlen);
};

///////////////////////////////////////////////////////////////////////////
//
//    Templated Namespace class
//
///////////////////////////////////////////////////////////////////////////

template <class T>
class VDNamespace2 : public VDNamespace {
public:
    VDNamespace2() {}
    ~VDNamespace2() {}

    typedef bool (*tGroupEnumerator)(VDNamespace2<T> *pThis, const char *pszName, const VDNamespaceGroup *pGroup, void *pvData);
    typedef bool (*tItemEnumerator)(VDNamespace2<T> *pThis, const char *pszName, const T *pItem, void *pvData);

    void add(const char *pszGroup, const char *pszName, const T *pDef) {
        VDNamespace::add(pszGroup, pszName, pDef);
    }

    const T *lookup(const char *pszName) {
        return static_cast<const T *>(VDNamespace::lookup(pszName));
    }

    bool enumerateGroups(const VDNamespaceGroup *pGroupRoot, tGroupEnumerator pEnum, void *pvData) {
        for(ListAlloc<VDNamespaceGroup>::fwit it = (pGroupRoot ? pGroupRoot : &root)->listGroups.begin(); it; ++it)
            if (!pEnum(this, it->pszName, it, pvData))
                return false;

        return true;
    }

    bool enumerateItems(const VDNamespaceGroup *pGroupRoot, tItemEnumerator pEnum, void *pvData) {
        for(ListAlloc<VDNamespaceItem>::fwit it = (pGroupRoot ? pGroupRoot : &root)->listItems.begin(); it; ++it)
            if (!pEnum(this, it->pszName, static_cast<const T *>(it->object), pvData))
                return false;

        return true;
    }

    bool getPathByItem(const T *pObj, char *buf, int maxlen) {
        return VDNamespace::getPathByItem(pObj, buf, maxlen);
    }
};

#endif