mirror of
https://github.com/ptitSeb/Serious-Engine
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83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
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/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */
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#ifndef SE_INCL_RELATIONS_H
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#define SE_INCL_RELATIONS_H
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#ifdef PRAGMA_ONCE
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#pragma once
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#endif
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#include <Engine/Base/Lists.h>
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// Object representing a link at the member of relation domain.
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class CRelationSrc : public CListHead {
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public:
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// implementation:
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// interface:
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// Construction/destruction.
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ENGINE_API CRelationSrc(void);
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ENGINE_API ~CRelationSrc(void);
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void Clear(void);
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};
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// Object representing a link at the member of relation codomain.
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class CRelationDst : public CListHead {
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public:
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// implementation:
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// interface:
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// Construction/destruction.
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ENGINE_API CRelationDst(void);
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ENGINE_API ~CRelationDst(void);
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void Clear(void);
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};
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// Object representing a link between a domain member and a codomain member.
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class CRelationLnk {
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public:
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// implementation:
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CRelationSrc *rl_prsSrc; // domain member
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CRelationDst *rl_prdDst; // codomain member
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CListNode rl_lnSrc; // node in list of links in domain member
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CListNode rl_lnDst; // node in list of links in codomain member
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// interface:
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// Construction/destruction.
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CRelationLnk(void);
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~CRelationLnk(void);
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// Get the domain member of this pair.
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ENGINE_API CRelationSrc &GetSrc(void);
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// Get the codomain member of this pair.
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ENGINE_API CRelationDst &GetDst(void);
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};
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// Global functions for creating relations.
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void ENGINE_API AddRelationPair(CRelationSrc &rsSrc, CRelationDst &rdDst);
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void ENGINE_API AddRelationPairTailTail(CRelationSrc &rsSrc, CRelationDst &rdDst);
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void ENGINE_API AddRelationPairHeadHead(CRelationSrc &rsSrc, CRelationDst &rdDst);
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// make 'for' construct for walking a list in domain member
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#define FOREACHSRCLINK(head, iter) \
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for ( LISTITER(CRelationLnk, rl_lnSrc) iter(head); !iter.IsPastEnd(); iter.MoveToNext() )
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// make 'for' construct for walking a list in codomain member
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#define FOREACHDSTLINK(head, iter) \
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for ( LISTITER(CRelationLnk, rl_lnDst) iter(head); !iter.IsPastEnd(); iter.MoveToNext() )
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// get a domain member related to a codomain member through a link
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#define DST(plink, dstclass, dstmember) \
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( (dstclass *) ( ((UBYTE *)(&(plink->GetDst()))) - offsetof(dstclass, dstmember) ) )
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// get a codomain member that a domain member is related to through a link
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#define SRC(plink, srcclass, srcmember) \
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( (srcclass *) ( ((UBYTE *)(&(plink->GetSrc()))) - offsetof(srcclass, srcmember) ) )
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// make 'for' construct for walking all codomain members related to a domain member
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#define FOREACHDSTOFSRC(srchead, dstclass, dstmember, pdst) \
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FOREACHSRCLINK(srchead, pdst##_iter) { \
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dstclass *pdst = DST(pdst##_iter, dstclass, dstmember);
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// make 'for' construct for walking all domain members related to a codomain member
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#define FOREACHSRCOFDST(dsthead, srcclass, srcmember, psrc) \
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FOREACHDSTLINK(dsthead, psrc##_iter) { \
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srcclass *psrc = SRC(psrc##_iter, srcclass, srcmember);
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#define ENDFOR }
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#endif /* include-once check. */
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