69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/*
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* Copyright (C) 2014-2019 Muhammad Tayyab Akram
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <SBConfig.h>
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#include <stddef.h>
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#include "BidiChain.h"
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#include "RunExtrema.h"
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#include "RunKind.h"
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#include "SBAssert.h"
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#include "LevelRun.h"
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SB_INTERNAL void LevelRunInitialize(LevelRunRef levelRun,
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BidiChainRef bidiChain, BidiLink firstLink, BidiLink lastLink,
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SBBidiType sor, SBBidiType eor)
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{
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SBBidiType firstType = BidiChainGetType(bidiChain, firstLink);
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SBBidiType lastType = BidiChainGetType(bidiChain, lastLink);
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levelRun->next = NULL;
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levelRun->firstLink = firstLink;
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levelRun->lastLink = lastLink;
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levelRun->subsequentLink = BidiChainGetNext(bidiChain, lastLink);
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levelRun->extrema = RunExtremaMake(sor, eor);
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levelRun->kind = RunKindMake
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(
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SBBidiTypeIsIsolateInitiator(lastType),
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SBBidiTypeIsIsolateTerminator(firstType)
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);
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levelRun->level = BidiChainGetLevel(bidiChain, firstLink);
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}
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SB_INTERNAL void LevelRunAttach(LevelRunRef levelRun, LevelRunRef next)
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{
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/* Only the runs of same level can be attached. */
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SBAssert(levelRun->level == next->level);
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/* No other run can be attached with a simple run. */
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SBAssert(!RunKindIsSimple(levelRun->kind));
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/* No other run can be attached with a complete isolating run. */
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SBAssert(!RunKindIsCompleteIsolate(levelRun->kind));
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/* Only a terminating run can be attached with an isolating run. */
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SBAssert(RunKindIsIsolate(levelRun->kind) && RunKindIsTerminating(next->kind));
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/* The next run must be unattached. */
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SBAssert(!RunKindIsAttachedTerminating(next->kind));
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if (RunKindIsTerminating(next->kind)) {
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RunKindMakeAttached(next->kind);
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}
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if (RunKindIsIsolate(levelRun->kind)) {
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RunKindMakeComplete(levelRun->kind);
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}
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levelRun->next = next;
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}
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