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icu/source/common/filteredbrk.cpp

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2014-2015, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_BREAK_ITERATION && !UCONFIG_NO_FILTERED_BREAK_ITERATION
#include "cmemory.h"
#include "unicode/filteredbrk.h"
#include "unicode/ucharstriebuilder.h"
#include "unicode/ures.h"
#include "uresimp.h" // ures_getByKeyWithFallback
#include "ubrkimpl.h" // U_ICUDATA_BRKITR
#include "uvector.h"
#include "cmemory.h"
U_NAMESPACE_BEGIN
#ifndef FB_DEBUG
#define FB_DEBUG 0
#endif
#if FB_DEBUG
#include <stdio.h>
static void _fb_trace(const char *m, const UnicodeString *s, UBool b, int32_t d, const char *f, int l) {
char buf[2048];
if(s) {
s->extract(0,s->length(),buf,2048);
} else {
strcpy(buf,"NULL");
}
fprintf(stderr,"%s:%d: %s. s='%s'(%p), b=%c, d=%d\n",
f, l, m, buf, (const void*)s, b?'T':'F',(int)d);
}
#define FB_TRACE(m,s,b,d) _fb_trace(m,s,b,d,__FILE__,__LINE__)
#else
#define FB_TRACE(m,s,b,d)
#endif
/**
* Used with sortedInsert()
*/
static int8_t U_CALLCONV compareUnicodeString(UElement t1, UElement t2) {
const UnicodeString &a = *(const UnicodeString*)t1.pointer;
const UnicodeString &b = *(const UnicodeString*)t2.pointer;
return a.compare(b);
}
/**
* A UVector which implements a set of strings.
*/
class U_COMMON_API UStringSet : public UVector {
public:
UStringSet(UErrorCode &status) : UVector(uprv_deleteUObject,
uhash_compareUnicodeString,
1,
status) {}
virtual ~UStringSet();
/**
* Is this UnicodeSet contained?
*/
inline UBool contains(const UnicodeString& s) {
return contains((void*) &s);
}
using UVector::contains;
/**
* Return the ith UnicodeString alias
*/
inline const UnicodeString* getStringAt(int32_t i) const {
return (const UnicodeString*)elementAt(i);
}
/**
* Adopt the UnicodeString if not already contained.
* Caller no longer owns the pointer in any case.
* @return true if adopted successfully, false otherwise (error, or else duplicate)
*/
inline UBool adopt(UnicodeString *str, UErrorCode &status) {
if(U_FAILURE(status) || contains(*str)) {
delete str;
return false;
} else {
sortedInsert(str, compareUnicodeString, status);
if(U_FAILURE(status)) {
delete str;
return false;
}
return true;
}
}
/**
* Add by value.
* @return true if successfully adopted.
*/
inline UBool add(const UnicodeString& str, UErrorCode &status) {
if(U_FAILURE(status)) return false;
UnicodeString *t = new UnicodeString(str);
if(t==NULL) {
status = U_MEMORY_ALLOCATION_ERROR; return false;
}
return adopt(t, status);
}
/**
* Remove this string.
* @return true if successfully removed, false otherwise (error, or else it wasn't there)
*/
inline UBool remove(const UnicodeString &s, UErrorCode &status) {
if(U_FAILURE(status)) return false;
return removeElement((void*) &s);
}
};
/**
* Virtual, won't be inlined
*/
UStringSet::~UStringSet() {}
/* ----------------------------------------------------------- */
/* Filtered Break constants */
static const int32_t kPARTIAL = (1<<0); //< partial - need to run through forward trie
static const int32_t kMATCH = (1<<1); //< exact match - skip this one.
static const int32_t kSuppressInReverse = (1<<0);
static const int32_t kAddToForward = (1<<1);
static const UChar kFULLSTOP = 0x002E; // '.'
/**
* Shared data for SimpleFilteredSentenceBreakIterator
*/
class SimpleFilteredSentenceBreakData : public UMemory {
public:
SimpleFilteredSentenceBreakData(UCharsTrie *forwards, UCharsTrie *backwards )
: fForwardsPartialTrie(forwards), fBackwardsTrie(backwards), refcount(1) { }
SimpleFilteredSentenceBreakData *incr() { refcount++; return this; }
SimpleFilteredSentenceBreakData *decr() { if((--refcount) <= 0) delete this; return 0; }
virtual ~SimpleFilteredSentenceBreakData();
LocalPointer<UCharsTrie> fForwardsPartialTrie; // Has ".a" for "a.M."
LocalPointer<UCharsTrie> fBackwardsTrie; // i.e. ".srM" for Mrs.
int32_t refcount;
};
SimpleFilteredSentenceBreakData::~SimpleFilteredSentenceBreakData() {}
/**
* Concrete implementation
*/
class SimpleFilteredSentenceBreakIterator : public BreakIterator {
public:
SimpleFilteredSentenceBreakIterator(BreakIterator *adopt, UCharsTrie *forwards, UCharsTrie *backwards, UErrorCode &status);
SimpleFilteredSentenceBreakIterator(const SimpleFilteredSentenceBreakIterator& other);
virtual ~SimpleFilteredSentenceBreakIterator();
private:
SimpleFilteredSentenceBreakData *fData;
LocalPointer<BreakIterator> fDelegate;
LocalUTextPointer fText;
/* -- subclass interface -- */
public:
/* -- cloning and other subclass stuff -- */
virtual BreakIterator * createBufferClone(void * /*stackBuffer*/,
int32_t &/*BufferSize*/,
UErrorCode &status) {
// for now - always deep clone
status = U_SAFECLONE_ALLOCATED_WARNING;
return clone();
}
virtual BreakIterator* clone(void) const { return new SimpleFilteredSentenceBreakIterator(*this); }
virtual UClassID getDynamicClassID(void) const { return NULL; }
virtual UBool operator==(const BreakIterator& o) const { if(this==&o) return true; return false; }
/* -- text modifying -- */
virtual void setText(UText *text, UErrorCode &status) { fDelegate->setText(text,status); }
virtual BreakIterator &refreshInputText(UText *input, UErrorCode &status) { fDelegate->refreshInputText(input,status); return *this; }
virtual void adoptText(CharacterIterator* it) { fDelegate->adoptText(it); }
virtual void setText(const UnicodeString &text) { fDelegate->setText(text); }
/* -- other functions that are just delegated -- */
virtual UText *getUText(UText *fillIn, UErrorCode &status) const { return fDelegate->getUText(fillIn,status); }
virtual CharacterIterator& getText(void) const { return fDelegate->getText(); }
/* -- ITERATION -- */
virtual int32_t first(void);
virtual int32_t preceding(int32_t offset);
virtual int32_t previous(void);
virtual UBool isBoundary(int32_t offset);
virtual int32_t current(void) const { return fDelegate->current(); } // we keep the delegate current, so this should be correct.
virtual int32_t next(void);
virtual int32_t next(int32_t n);
virtual int32_t following(int32_t offset);
virtual int32_t last(void);
private:
/**
* Given that the fDelegate has already given its "initial" answer,
* find the NEXT actual (non-excepted) break.
* @param n initial position from delegate
* @return new break position or UBRK_DONE
*/
int32_t internalNext(int32_t n);
/**
* Given that the fDelegate has already given its "initial" answer,
* find the PREV actual (non-excepted) break.
* @param n initial position from delegate
* @return new break position or UBRK_DONE
*/
int32_t internalPrev(int32_t n);
/**
* set up the UText with the value of the fDelegate.
* Call this before calling breakExceptionAt.
* May be able to avoid excess calls
*/
void resetState(UErrorCode &status);
/**
* Is there a match (exception) at this spot?
*/
enum EFBMatchResult { kNoExceptionHere, kExceptionHere };
/**
* Determine if there is an exception at this spot
* @param n spot to check
* @return kNoExceptionHere or kExceptionHere
**/
enum EFBMatchResult breakExceptionAt(int32_t n);
};
SimpleFilteredSentenceBreakIterator::SimpleFilteredSentenceBreakIterator(const SimpleFilteredSentenceBreakIterator& other)
: BreakIterator(other), fData(other.fData->incr()), fDelegate(other.fDelegate->clone())
{
}
SimpleFilteredSentenceBreakIterator::SimpleFilteredSentenceBreakIterator(BreakIterator *adopt, UCharsTrie *forwards, UCharsTrie *backwards, UErrorCode &status) :
BreakIterator(adopt->getLocale(ULOC_VALID_LOCALE,status),adopt->getLocale(ULOC_ACTUAL_LOCALE,status)),
fData(new SimpleFilteredSentenceBreakData(forwards, backwards)),
fDelegate(adopt)
{
// all set..
}
SimpleFilteredSentenceBreakIterator::~SimpleFilteredSentenceBreakIterator() {
fData = fData->decr();
}
void SimpleFilteredSentenceBreakIterator::resetState(UErrorCode &status) {
fText.adoptInstead(fDelegate->getUText(fText.orphan(), status));
}
SimpleFilteredSentenceBreakIterator::EFBMatchResult
SimpleFilteredSentenceBreakIterator::breakExceptionAt(int32_t n) {
int64_t bestPosn = -1;
int32_t bestValue = -1;
// loops while 'n' points to an exception.
utext_setNativeIndex(fText.getAlias(), n); // from n..
fData->fBackwardsTrie->reset();
UChar32 uch;
//if(debug2) u_printf(" n@ %d\n", n);
// Assume a space is following the '.' (so we handle the case: "Mr. /Brown")
if((uch=utext_previous32(fText.getAlias()))==(UChar32)0x0020) { // TODO: skip a class of chars here??
// TODO only do this the 1st time?
//if(debug2) u_printf("skipping prev: |%C| \n", (UChar)uch);
} else {
//if(debug2) u_printf("not skipping prev: |%C| \n", (UChar)uch);
uch = utext_next32(fText.getAlias());
//if(debug2) u_printf(" -> : |%C| \n", (UChar)uch);
}
UStringTrieResult r = USTRINGTRIE_INTERMEDIATE_VALUE;
while((uch=utext_previous32(fText.getAlias()))!=U_SENTINEL && // more to consume backwards and..
USTRINGTRIE_HAS_NEXT(r=fData->fBackwardsTrie->nextForCodePoint(uch))) {// more in the trie
if(USTRINGTRIE_HAS_VALUE(r)) { // remember the best match so far
bestPosn = utext_getNativeIndex(fText.getAlias());
bestValue = fData->fBackwardsTrie->getValue();
}
//if(debug2) u_printf("rev< /%C/ cont?%d @%d\n", (UChar)uch, r, utext_getNativeIndex(fText.getAlias()));
}
if(USTRINGTRIE_MATCHES(r)) { // exact match?
//if(debug2) u_printf("rev<?/%C/?end of seq.. r=%d, bestPosn=%d, bestValue=%d\n", (UChar)uch, r, bestPosn, bestValue);
bestValue = fData->fBackwardsTrie->getValue();
bestPosn = utext_getNativeIndex(fText.getAlias());
//if(debug2) u_printf("rev<+/%C/+end of seq.. r=%d, bestPosn=%d, bestValue=%d\n", (UChar)uch, r, bestPosn, bestValue);
}
if(bestPosn>=0) {
//if(debug2) u_printf("rev< /%C/ end of seq.. r=%d, bestPosn=%d, bestValue=%d\n", (UChar)uch, r, bestPosn, bestValue);
//if(USTRINGTRIE_MATCHES(r)) { // matched - so, now what?
//int32_t bestValue = fBackwardsTrie->getValue();
////if(debug2) u_printf("rev< /%C/ matched, skip..%d bestValue=%d\n", (UChar)uch, r, bestValue);
if(bestValue == kMATCH) { // exact match!
//if(debug2) u_printf(" exact backward match\n");
return kExceptionHere; // See if the next is another exception.
} else if(bestValue == kPARTIAL
&& fData->fForwardsPartialTrie.isValid()) { // make sure there's a forward trie
//if(debug2) u_printf(" partial backward match\n");
// We matched the "Ph." in "Ph.D." - now we need to run everything through the forwards trie
// to see if it matches something going forward.
fData->fForwardsPartialTrie->reset();
UStringTrieResult rfwd = USTRINGTRIE_INTERMEDIATE_VALUE;
utext_setNativeIndex(fText.getAlias(), bestPosn); // hope that's close ..
//if(debug2) u_printf("Retrying at %d\n", bestPosn);
while((uch=utext_next32(fText.getAlias()))!=U_SENTINEL &&
USTRINGTRIE_HAS_NEXT(rfwd=fData->fForwardsPartialTrie->nextForCodePoint(uch))) {
//if(debug2) u_printf("fwd> /%C/ cont?%d @%d\n", (UChar)uch, rfwd, utext_getNativeIndex(fText.getAlias()));
}
if(USTRINGTRIE_MATCHES(rfwd)) {
//if(debug2) u_printf("fwd> /%C/ == forward match!\n", (UChar)uch);
// only full matches here, nothing to check
// skip the next:
return kExceptionHere;
} else {
//if(debug2) u_printf("fwd> /%C/ no match.\n", (UChar)uch);
// no match (no exception) -return the 'underlying' break
return kNoExceptionHere;
}
} else {
return kNoExceptionHere; // internal error and/or no forwards trie
}
} else {
//if(debug2) u_printf("rev< /%C/ .. no match..%d\n", (UChar)uch, r); // no best match
return kNoExceptionHere; // No match - so exit. Not an exception.
}
}
// the workhorse single next.
int32_t
SimpleFilteredSentenceBreakIterator::internalNext(int32_t n) {
if(n == UBRK_DONE || // at end or
fData->fBackwardsTrie.isNull()) { // .. no backwards table loaded == no exceptions
return n;
}
// OK, do we need to break here?
UErrorCode status = U_ZERO_ERROR;
// refresh text
resetState(status);
if(U_FAILURE(status)) return UBRK_DONE; // bail out
int64_t utextLen = utext_nativeLength(fText.getAlias());
//if(debug2) u_printf("str, native len=%d\n", utext_nativeLength(fText.getAlias()));
while (n != UBRK_DONE && n != utextLen) { // outer loop runs once per underlying break (from fDelegate).
SimpleFilteredSentenceBreakIterator::EFBMatchResult m = breakExceptionAt(n);
switch(m) {
case kExceptionHere:
n = fDelegate->next(); // skip this one. Find the next lowerlevel break.
continue;
default:
case kNoExceptionHere:
return n;
}
}
return n;
}
int32_t
SimpleFilteredSentenceBreakIterator::internalPrev(int32_t n) {
if(n == 0 || n == UBRK_DONE || // at end or
fData->fBackwardsTrie.isNull()) { // .. no backwards table loaded == no exceptions
return n;
}
// OK, do we need to break here?
UErrorCode status = U_ZERO_ERROR;
// refresh text
resetState(status);
if(U_FAILURE(status)) return UBRK_DONE; // bail out
//if(debug2) u_printf("str, native len=%d\n", utext_nativeLength(fText.getAlias()));
while (n != UBRK_DONE && n != 0) { // outer loop runs once per underlying break (from fDelegate).
SimpleFilteredSentenceBreakIterator::EFBMatchResult m = breakExceptionAt(n);
switch(m) {
case kExceptionHere:
n = fDelegate->previous(); // skip this one. Find the next lowerlevel break.
continue;
default:
case kNoExceptionHere:
return n;
}
}
return n;
}
int32_t
SimpleFilteredSentenceBreakIterator::next() {
return internalNext(fDelegate->next());
}
int32_t
SimpleFilteredSentenceBreakIterator::first(void) {
// Don't suppress a break opportunity at the beginning of text.
return fDelegate->first();
}
int32_t
SimpleFilteredSentenceBreakIterator::preceding(int32_t offset) {
return internalPrev(fDelegate->preceding(offset));
}
int32_t
SimpleFilteredSentenceBreakIterator::previous(void) {
return internalPrev(fDelegate->previous());
}
UBool SimpleFilteredSentenceBreakIterator::isBoundary(int32_t offset) {
if (!fDelegate->isBoundary(offset)) return false; // no break to suppress
if (fData->fBackwardsTrie.isNull()) return true; // no data = no suppressions
UErrorCode status = U_ZERO_ERROR;
resetState(status);
SimpleFilteredSentenceBreakIterator::EFBMatchResult m = breakExceptionAt(offset);
switch(m) {
case kExceptionHere:
return false;
default:
case kNoExceptionHere:
return true;
}
}
int32_t
SimpleFilteredSentenceBreakIterator::next(int32_t offset) {
return internalNext(fDelegate->next(offset));
}
int32_t
SimpleFilteredSentenceBreakIterator::following(int32_t offset) {
return internalNext(fDelegate->following(offset));
}
int32_t
SimpleFilteredSentenceBreakIterator::last(void) {
// Don't suppress a break opportunity at the end of text.
return fDelegate->last();
}
/**
* Concrete implementation of builder class.
*/
class U_COMMON_API SimpleFilteredBreakIteratorBuilder : public FilteredBreakIteratorBuilder {
public:
virtual ~SimpleFilteredBreakIteratorBuilder();
SimpleFilteredBreakIteratorBuilder(const Locale &fromLocale, UErrorCode &status);
SimpleFilteredBreakIteratorBuilder(UErrorCode &status);
virtual UBool suppressBreakAfter(const UnicodeString& exception, UErrorCode& status);
virtual UBool unsuppressBreakAfter(const UnicodeString& exception, UErrorCode& status);
virtual BreakIterator *build(BreakIterator* adoptBreakIterator, UErrorCode& status);
private:
UStringSet fSet;
};
SimpleFilteredBreakIteratorBuilder::~SimpleFilteredBreakIteratorBuilder()
{
}
SimpleFilteredBreakIteratorBuilder::SimpleFilteredBreakIteratorBuilder(UErrorCode &status)
: fSet(status)
{
}
SimpleFilteredBreakIteratorBuilder::SimpleFilteredBreakIteratorBuilder(const Locale &fromLocale, UErrorCode &status)
: fSet(status)
{
if(U_SUCCESS(status)) {
UErrorCode subStatus = U_ZERO_ERROR;
LocalUResourceBundlePointer b(ures_open(U_ICUDATA_BRKITR, fromLocale.getBaseName(), &subStatus));
if (U_FAILURE(subStatus) || (subStatus == U_USING_DEFAULT_WARNING) ) {
status = subStatus; // copy the failing status
#if FB_DEBUG
fprintf(stderr, "open BUNDLE %s : %s, %s\n", fromLocale.getBaseName(), "[exit]", u_errorName(status));
#endif
return; // leaves the builder empty, if you try to use it.
}
LocalUResourceBundlePointer exceptions(ures_getByKeyWithFallback(b.getAlias(), "exceptions", NULL, &subStatus));
if (U_FAILURE(subStatus) || (subStatus == U_USING_DEFAULT_WARNING) ) {
status = subStatus; // copy the failing status
#if FB_DEBUG
fprintf(stderr, "open EXCEPTIONS %s : %s, %s\n", fromLocale.getBaseName(), "[exit]", u_errorName(status));
#endif
return; // leaves the builder empty, if you try to use it.
}
LocalUResourceBundlePointer breaks(ures_getByKeyWithFallback(exceptions.getAlias(), "SentenceBreak", NULL, &subStatus));
#if FB_DEBUG
{
UErrorCode subsub = subStatus;
fprintf(stderr, "open SentenceBreak %s => %s, %s\n", fromLocale.getBaseName(), ures_getLocale(breaks.getAlias(), &subsub), u_errorName(subStatus));
}
#endif
if (U_FAILURE(subStatus) || (subStatus == U_USING_DEFAULT_WARNING) ) {
status = subStatus; // copy the failing status
#if FB_DEBUG
fprintf(stderr, "open %s : %s, %s\n", fromLocale.getBaseName(), "[exit]", u_errorName(status));
#endif
return; // leaves the builder empty, if you try to use it.
}
LocalUResourceBundlePointer strs;
subStatus = status; // Pick up inherited warning status now
do {
strs.adoptInstead(ures_getNextResource(breaks.getAlias(), strs.orphan(), &subStatus));
if(strs.isValid() && U_SUCCESS(subStatus)) {
UnicodeString str(ures_getUnicodeString(strs.getAlias(), &status));
suppressBreakAfter(str, status); // load the string
}
} while (strs.isValid() && U_SUCCESS(subStatus));
if(U_FAILURE(subStatus)&&subStatus!=U_INDEX_OUTOFBOUNDS_ERROR&&U_SUCCESS(status)) {
status = subStatus;
}
}
}
UBool
SimpleFilteredBreakIteratorBuilder::suppressBreakAfter(const UnicodeString& exception, UErrorCode& status)
{
UBool r = fSet.add(exception, status);
FB_TRACE("suppressBreakAfter",&exception,r,0);
return r;
}
UBool
SimpleFilteredBreakIteratorBuilder::unsuppressBreakAfter(const UnicodeString& exception, UErrorCode& status)
{
UBool r = fSet.remove(exception, status);
FB_TRACE("unsuppressBreakAfter",&exception,r,0);
return r;
}
/**
* Jitterbug 2974: MSVC has a bug whereby new X[0] behaves badly.
* Work around this.
*
* Note: "new UnicodeString[subCount]" ends up calling global operator new
* on MSVC2012 for some reason.
*/
static inline UnicodeString* newUnicodeStringArray(size_t count) {
return new UnicodeString[count ? count : 1];
}
BreakIterator *
SimpleFilteredBreakIteratorBuilder::build(BreakIterator* adoptBreakIterator, UErrorCode& status) {
LocalPointer<BreakIterator> adopt(adoptBreakIterator);
LocalPointer<UCharsTrieBuilder> builder(new UCharsTrieBuilder(status), status);
LocalPointer<UCharsTrieBuilder> builder2(new UCharsTrieBuilder(status), status);
if(U_FAILURE(status)) {
return NULL;
}
int32_t revCount = 0;
int32_t fwdCount = 0;
int32_t subCount = fSet.size();
UnicodeString *ustrs_ptr = newUnicodeStringArray(subCount);
LocalArray<UnicodeString> ustrs(ustrs_ptr);
LocalMemory<int> partials;
partials.allocateInsteadAndReset(subCount);
LocalPointer<UCharsTrie> backwardsTrie; // i.e. ".srM" for Mrs.
LocalPointer<UCharsTrie> forwardsPartialTrie; // Has ".a" for "a.M."
int n=0;
for ( int32_t i = 0;
i<fSet.size();
i++) {
const UnicodeString *abbr = fSet.getStringAt(i);
if(abbr) {
FB_TRACE("build",abbr,TRUE,i);
ustrs[n] = *abbr; // copy by value
FB_TRACE("ustrs[n]",&ustrs[n],TRUE,i);
} else {
FB_TRACE("build",abbr,FALSE,i);
status = U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
partials[n] = 0; // default: not partial
n++;
}
// first pass - find partials.
for(int i=0;i<subCount;i++) {
int nn = ustrs[i].indexOf(kFULLSTOP); // TODO: non-'.' abbreviations
if(nn>-1 && (nn+1)!=ustrs[i].length()) {
FB_TRACE("partial",&ustrs[i],FALSE,i);
// is partial.
// is it unique?
int sameAs = -1;
for(int j=0;j<subCount;j++) {
if(j==i) continue;
if(ustrs[i].compare(0,nn+1,ustrs[j],0,nn+1)==0) {
FB_TRACE("prefix",&ustrs[j],FALSE,nn+1);
//UBool otherIsPartial = ((nn+1)!=ustrs[j].length()); // true if ustrs[j] doesn't end at nn
if(partials[j]==0) { // hasn't been processed yet
partials[j] = kSuppressInReverse | kAddToForward;
FB_TRACE("suppressing",&ustrs[j],FALSE,j);
} else if(partials[j] & kSuppressInReverse) {
sameAs = j; // the other entry is already in the reverse table.
}
}
}
FB_TRACE("for partial same-",&ustrs[i],FALSE,sameAs);
FB_TRACE(" == partial #",&ustrs[i],FALSE,partials[i]);
UnicodeString prefix(ustrs[i], 0, nn+1);
if(sameAs == -1 && partials[i] == 0) {
// first one - add the prefix to the reverse table.
prefix.reverse();
builder->add(prefix, kPARTIAL, status);
revCount++;
FB_TRACE("Added partial",&prefix,FALSE, i);
FB_TRACE(u_errorName(status),&ustrs[i],FALSE,i);
partials[i] = kSuppressInReverse | kAddToForward;
} else {
FB_TRACE("NOT adding partial",&prefix,FALSE, i);
FB_TRACE(u_errorName(status),&ustrs[i],FALSE,i);
}
}
}
for(int i=0;i<subCount;i++) {
if(partials[i]==0) {
ustrs[i].reverse();
builder->add(ustrs[i], kMATCH, status);
revCount++;
FB_TRACE(u_errorName(status), &ustrs[i], FALSE, i);
} else {
FB_TRACE("Adding fwd",&ustrs[i], FALSE, i);
// an optimization would be to only add the portion after the '.'
// for example, for "Ph.D." we store ".hP" in the reverse table. We could just store "D." in the forward,
// instead of "Ph.D." since we already know the "Ph." part is a match.
// would need the trie to be able to hold 0-length strings, though.
builder2->add(ustrs[i], kMATCH, status); // forward
fwdCount++;
//ustrs[i].reverse();
////if(debug2) u_printf("SUPPRESS- not Added(%d): /%S/ status=%s\n",partials[i], ustrs[i].getTerminatedBuffer(), u_errorName(status));
}
}
FB_TRACE("AbbrCount",NULL,FALSE, subCount);
if(revCount>0) {
backwardsTrie.adoptInstead(builder->build(USTRINGTRIE_BUILD_FAST, status));
if(U_FAILURE(status)) {
FB_TRACE(u_errorName(status),NULL,FALSE, -1);
return NULL;
}
}
if(fwdCount>0) {
forwardsPartialTrie.adoptInstead(builder2->build(USTRINGTRIE_BUILD_FAST, status));
if(U_FAILURE(status)) {
FB_TRACE(u_errorName(status),NULL,FALSE, -1);
return NULL;
}
}
return new SimpleFilteredSentenceBreakIterator(adopt.orphan(), forwardsPartialTrie.orphan(), backwardsTrie.orphan(), status);
}
// ----------- Base class implementation
FilteredBreakIteratorBuilder::FilteredBreakIteratorBuilder() {
}
FilteredBreakIteratorBuilder::~FilteredBreakIteratorBuilder() {
}
FilteredBreakIteratorBuilder *
FilteredBreakIteratorBuilder::createInstance(const Locale& where, UErrorCode& status) {
if(U_FAILURE(status)) return NULL;
LocalPointer<FilteredBreakIteratorBuilder> ret(new SimpleFilteredBreakIteratorBuilder(where, status), status);
return (U_SUCCESS(status))? ret.orphan(): NULL;
}
FilteredBreakIteratorBuilder *
FilteredBreakIteratorBuilder::createEmptyInstance(UErrorCode& status) {
if(U_FAILURE(status)) return NULL;
LocalPointer<FilteredBreakIteratorBuilder> ret(new SimpleFilteredBreakIteratorBuilder(status), status);
return (U_SUCCESS(status))? ret.orphan(): NULL;
}
U_NAMESPACE_END
#endif //#if !UCONFIG_NO_BREAK_ITERATION && !UCONFIG_NO_FILTERED_BREAK_ITERATION
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