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70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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* PROGRAM: JRD Access Method
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* MODULE: evl_proto.h
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* DESCRIPTION: Prototype header file for evl.cpp
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*
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* The contents of this file are subject to the Interbase Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy
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* of the License at http://www.Inprise.com/IPL.html
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code was created by Inprise Corporation
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* and its predecessors. Portions created by Inprise Corporation are
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* Copyright (C) Inprise Corporation.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*/
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#ifndef JRD_EVL_PROTO_H
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#define JRD_EVL_PROTO_H
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#include "../jrd/intl_classes.h"
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#include "../jrd/req.h"
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namespace Jrd
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{
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class InversionNode;
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struct Item;
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class ItemInfo;
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}
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dsc* EVL_assign_to(Jrd::thread_db* tdbb, const Jrd::ValueExprNode*);
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Jrd::RecordBitmap** EVL_bitmap(Jrd::thread_db* tdbb, const Jrd::InversionNode*, Jrd::RecordBitmap*);
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bool EVL_field(Jrd::jrd_rel*, Jrd::Record*, USHORT, dsc*);
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void EVL_make_value(Jrd::thread_db* tdbb, const dsc*, Jrd::impure_value*, MemoryPool* pool = NULL);
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void EVL_validate(Jrd::thread_db*, const Jrd::Item&, const Jrd::ItemInfo*, dsc*, bool);
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namespace Jrd
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{
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// Evaluate a value expression.
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inline dsc* EVL_expr(thread_db* tdbb, jrd_req* request, const ValueExprNode* node)
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{
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if (!node)
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BUGCHECK(303); // msg 303 Invalid expression for evaluation
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SET_TDBB(tdbb);
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if (--tdbb->tdbb_quantum < 0)
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JRD_reschedule(tdbb, 0, true);
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request->req_flags &= ~req_null;
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dsc* desc = node->execute(tdbb, request);
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if (desc)
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request->req_flags &= ~req_null;
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else
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request->req_flags |= req_null;
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return desc;
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}
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}
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#endif // JRD_EVL_PROTO_H
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