122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
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/*
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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 <stddef.h>
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#include <stdlib.h>
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#include "PairingLookup.h"
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#include "SBBase.h"
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#include "SBLine.h"
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#include "SBMirrorLocator.h"
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SBMirrorLocatorRef SBMirrorLocatorCreate(void)
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{
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SBMirrorLocatorRef locator;
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locator = malloc(sizeof(SBMirrorLocator));
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locator->_line = NULL;
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locator->retainCount = 1;
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SBMirrorLocatorReset(locator);
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return locator;
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}
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void SBMirrorLocatorLoadLine(SBMirrorLocatorRef locator, SBLineRef line, void *stringBuffer)
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{
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SBLineRelease(locator->_line);
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if (line && stringBuffer == line->codepointSequence.stringBuffer) {
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locator->_line = SBLineRetain(line);
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}
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SBMirrorLocatorReset(locator);
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}
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const SBMirrorAgent *SBMirrorLocatorGetAgent(SBMirrorLocatorRef locator)
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{
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return &locator->agent;
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}
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SBBoolean SBMirrorLocatorMoveNext(SBMirrorLocatorRef locator)
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{
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SBLineRef line = locator->_line;
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if (line) {
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const SBCodepointSequence *sequence = &line->codepointSequence;
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do {
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const SBRun *run = &line->fixedRuns[locator->_runIndex];
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if (run->level & 1) {
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SBUInteger stringIndex;
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SBUInteger stringLimit;
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stringIndex = locator->_stringIndex;
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if (stringIndex == SBInvalidIndex) {
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stringIndex = run->offset;
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}
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stringLimit = run->offset + run->length;
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while (stringIndex < stringLimit) {
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SBUInteger initialIndex = stringIndex;
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SBCodepoint codepoint = SBCodepointSequenceGetCodepointAt(sequence, &stringIndex);
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SBCodepoint mirror = LookupMirror(codepoint);
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if (mirror) {
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locator->_stringIndex = stringIndex;
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locator->agent.index = initialIndex;
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locator->agent.mirror = mirror;
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locator->agent.codepoint = codepoint;
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return SBTrue;
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}
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}
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}
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locator->_stringIndex = SBInvalidIndex;
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} while (++locator->_runIndex < line->runCount);
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SBMirrorLocatorReset(locator);
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}
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return SBFalse;
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}
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void SBMirrorLocatorReset(SBMirrorLocatorRef locator)
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{
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locator->_runIndex = 0;
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locator->_stringIndex = SBInvalidIndex;
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locator->agent.index = SBInvalidIndex;
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locator->agent.mirror = 0;
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}
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SBMirrorLocatorRef SBMirrorLocatorRetain(SBMirrorLocatorRef locator)
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{
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if (locator) {
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locator->retainCount += 1;
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}
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return locator;
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}
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void SBMirrorLocatorRelease(SBMirrorLocatorRef locator)
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{
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if (locator && --locator->retainCount == 0) {
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SBLineRelease(locator->_line);
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free(locator);
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}
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}
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