75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
/*
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**********************************************************************
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* Copyright (C) 1999-2000 IBM Corp. All rights reserved.
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**********************************************************************
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* Date Name Description
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* 12/1/99 rgillam Complete port from Java.
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* 01/13/2000 helena Added UErrorCode to ctors.
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**********************************************************************
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*/
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#include "ucmp8.h"
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#include "dbbi_tbl.h"
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#include "unicode/dbbi.h"
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U_NAMESPACE_BEGIN
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//=======================================================================
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// constructor
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//=======================================================================
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DictionaryBasedBreakIteratorTables::DictionaryBasedBreakIteratorTables(
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UDataMemory* tablesMemory,
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const char* dictionaryFilename,
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UErrorCode &status)
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: RuleBasedBreakIteratorTables(tablesMemory),
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dictionary(dictionaryFilename, status)
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{
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if(tablesMemory != 0) {
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const void* tablesImage = udata_getMemory(tablesMemory);
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if(tablesImage != 0) {
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if (U_FAILURE(status)) return;
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const int32_t* tablesIdx = (int32_t*) tablesImage;
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const int8_t* dbbiImage = ((const int8_t*)tablesImage + tablesIdx[8]);
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// we know the offset into the memory image where the DBBI stuff
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// starts is stored in element 8 of the array. There should be
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// a way for the RBBI constructor to give us this, but there's
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// isn't a good one.
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const int32_t* dbbiIdx = (const int32_t*)dbbiImage;
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categoryFlags = (int8_t*)((const int8_t*)dbbiImage + (int32_t)dbbiIdx[0]);
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}
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}
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}
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//=======================================================================
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// boilerplate
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//=======================================================================
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/**
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* Destructor
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*/
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DictionaryBasedBreakIteratorTables::~DictionaryBasedBreakIteratorTables() {
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if (ownTables)
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delete [] categoryFlags;
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}
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int32_t
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DictionaryBasedBreakIteratorTables::lookupCategory(UChar c,
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BreakIterator* bi) const {
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// this override of lookupCategory() exists only to keep track of whether we've
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// passed over any dictionary characters. It calls the inherited lookupCategory()
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// to do the real work, and then checks whether its return value is one of the
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// categories represented in the dictionary. If it is, bump the dictionary-
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// character count.
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int32_t result = RuleBasedBreakIteratorTables::lookupCategory(c, bi);
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if (result != RuleBasedBreakIterator::UBRK_IGNORE && categoryFlags[result]) {
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((DictionaryBasedBreakIterator*)bi)->bumpDictionaryCharCount();
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}
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return result;
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}
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U_NAMESPACE_END
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/* eof */
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