/*
*************************************************************************
* COPYRIGHT:
* Copyright (c) 1996-2010, International Business Machines Corporation and
* others. All Rights Reserved.
*************************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_NORMALIZATION
#include "unicode/uniset.h"
#include "unicode/unistr.h"
#include "unicode/chariter.h"
#include "unicode/schriter.h"
#include "unicode/uchriter.h"
#include "unicode/normlzr.h"
#include "cmemory.h"
#include "normalizer2impl.h"
#include "uprops.h" // for uniset_getUnicode32Instance()
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(Normalizer)
//-------------------------------------------------------------------------
// Constructors and other boilerplate
//-------------------------------------------------------------------------
Normalizer::Normalizer(const UnicodeString& str, UNormalizationMode mode) :
UObject(), fFilteredNorm2(NULL), fNorm2(NULL), fUMode(mode), fOptions(0),
text(new StringCharacterIterator(str)),
currentIndex(0), nextIndex(0),
buffer(), bufferPos(0)
{
init();
}
Normalizer::Normalizer(const UChar *str, int32_t length, UNormalizationMode mode) :
UObject(), fFilteredNorm2(NULL), fNorm2(NULL), fUMode(mode), fOptions(0),
text(new UCharCharacterIterator(str, length)),
currentIndex(0), nextIndex(0),
buffer(), bufferPos(0)
{
init();
}
Normalizer::Normalizer(const CharacterIterator& iter, UNormalizationMode mode) :
UObject(), fFilteredNorm2(NULL), fNorm2(NULL), fUMode(mode), fOptions(0),
text(iter.clone()),
currentIndex(0), nextIndex(0),
buffer(), bufferPos(0)
{
init();
}
Normalizer::Normalizer(const Normalizer ©) :
UObject(copy), fFilteredNorm2(NULL), fNorm2(NULL), fUMode(copy.fUMode), fOptions(copy.fOptions),
text(copy.text->clone()),
currentIndex(copy.currentIndex), nextIndex(copy.nextIndex),
buffer(copy.buffer), bufferPos(copy.bufferPos)
{
init();
}
static const UChar _NUL=0;
void
Normalizer::init() {
UErrorCode errorCode=U_ZERO_ERROR;
fNorm2=Normalizer2Factory::getInstance(fUMode, errorCode);
if(fOptions&UNORM_UNICODE_3_2) {
delete fFilteredNorm2;
fNorm2=fFilteredNorm2=
new FilteredNormalizer2(*fNorm2, *uniset_getUnicode32Instance(errorCode));
}
if(U_FAILURE(errorCode)) {
errorCode=U_ZERO_ERROR;
fNorm2=Normalizer2Factory::getNoopInstance(errorCode);
}
}
Normalizer::~Normalizer()
{
delete fFilteredNorm2;
delete text;
}
Normalizer*
Normalizer::clone() const
{
return new Normalizer(*this);
}
/**
* Generates a hash code for this iterator.
*/
int32_t Normalizer::hashCode() const
{
return text->hashCode() + fUMode + fOptions + buffer.hashCode() + bufferPos + currentIndex + nextIndex;
}
UBool Normalizer::operator==(const Normalizer& that) const
{
return
this==&that ||
fUMode==that.fUMode &&
fOptions==that.fOptions &&
*text==*that.text &&
buffer==that.buffer &&
bufferPos==that.bufferPos &&
nextIndex==that.nextIndex;
}
//-------------------------------------------------------------------------
// Static utility methods
//-------------------------------------------------------------------------
void U_EXPORT2
Normalizer::normalize(const UnicodeString& source,
UNormalizationMode mode, int32_t options,
UnicodeString& result,
UErrorCode &status) {
if(source.isBogus() || U_FAILURE(status)) {
result.setToBogus();
if(U_SUCCESS(status)) {
status=U_ILLEGAL_ARGUMENT_ERROR;
}
} else {
UnicodeString localDest;
UnicodeString *dest;
if(&source!=&result) {
dest=&result;
} else {
// the source and result strings are the same object, use a temporary one
dest=&localDest;
}
const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, status);
if(U_SUCCESS(status)) {
if(options&UNORM_UNICODE_3_2) {
FilteredNormalizer2(*n2, *uniset_getUnicode32Instance(status)).
normalize(source, *dest, status);
} else {
n2->normalize(source, *dest, status);
}
}
if(dest==&localDest && U_SUCCESS(status)) {
result=*dest;
}
}
}
void U_EXPORT2
Normalizer::compose(const UnicodeString& source,
UBool compat, int32_t options,
UnicodeString& result,
UErrorCode &status) {
normalize(source, compat ? UNORM_NFKC : UNORM_NFC, options, result, status);
}
void U_EXPORT2
Normalizer::decompose(const UnicodeString& source,
UBool compat, int32_t options,
UnicodeString& result,
UErrorCode &status) {
normalize(source, compat ? UNORM_NFKD : UNORM_NFD, options, result, status);
}
UNormalizationCheckResult
Normalizer::quickCheck(const UnicodeString& source,
UNormalizationMode mode, int32_t options,
UErrorCode &status) {
const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, status);
if(U_SUCCESS(status)) {
if(options&UNORM_UNICODE_3_2) {
return FilteredNormalizer2(*n2, *uniset_getUnicode32Instance(status)).
quickCheck(source, status);
} else {
return n2->quickCheck(source, status);
}
} else {
return UNORM_MAYBE;
}
}
UBool
Normalizer::isNormalized(const UnicodeString& source,
UNormalizationMode mode, int32_t options,
UErrorCode &status) {
const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, status);
if(U_SUCCESS(status)) {
if(options&UNORM_UNICODE_3_2) {
return FilteredNormalizer2(*n2, *uniset_getUnicode32Instance(status)).
isNormalized(source, status);
} else {
return n2->isNormalized(source, status);
}
} else {
return FALSE;
}
}
UnicodeString & U_EXPORT2
Normalizer::concatenate(UnicodeString &left, UnicodeString &right,
UnicodeString &result,
UNormalizationMode mode, int32_t options,
UErrorCode &errorCode) {
if(left.isBogus() || right.isBogus() || U_FAILURE(errorCode)) {
result.setToBogus();
if(U_SUCCESS(errorCode)) {
errorCode=U_ILLEGAL_ARGUMENT_ERROR;
}
} else {
UnicodeString localDest;
UnicodeString *dest;
if(&right!=&result) {
dest=&result;
} else {
// the right and result strings are the same object, use a temporary one
dest=&localDest;
}
*dest=left;
const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, errorCode);
if(U_SUCCESS(errorCode)) {
if(options&UNORM_UNICODE_3_2) {
FilteredNormalizer2(*n2, *uniset_getUnicode32Instance(errorCode)).
append(*dest, right, errorCode);
} else {
n2->append(*dest, right, errorCode);
}
}
if(dest==&localDest && U_SUCCESS(errorCode)) {
result=*dest;
}
}
return result;
}
//-------------------------------------------------------------------------
// Iteration API
//-------------------------------------------------------------------------
/**
* Return the current character in the normalized text.
*/
UChar32 Normalizer::current() {
if(bufferPos<buffer.length() || nextNormalize()) {
return buffer.char32At(bufferPos);
} else {
return DONE;
}
}
/**
* Return the next character in the normalized text and advance
* the iteration position by one. If the end
* of the text has already been reached, {@link #DONE} is returned.
*/
UChar32 Normalizer::next() {
if(bufferPos<buffer.length() || nextNormalize()) {
UChar32 c=buffer.char32At(bufferPos);
bufferPos+=UTF_CHAR_LENGTH(c);
return c;
} else {
return DONE;
}
}
/**
* Return the previous character in the normalized text and decrement
* the iteration position by one. If the beginning
* of the text has already been reached, {@link #DONE} is returned.
*/
UChar32 Normalizer::previous() {
if(bufferPos>0 || previousNormalize()) {
UChar32 c=buffer.char32At(bufferPos-1);
bufferPos-=UTF_CHAR_LENGTH(c);
return c;
} else {
return DONE;
}
}
void Normalizer::reset() {
currentIndex=nextIndex=text->setToStart();
clearBuffer();
}
void
Normalizer::setIndexOnly(int32_t index) {
text->setIndex(index); // pins index
currentIndex=nextIndex=text->getIndex();
clearBuffer();
}
/**
* Return the first character in the normalized text. This resets
* the <tt>Normalizer's</tt> position to the beginning of the text.
*/
UChar32 Normalizer::first() {
reset();
return next();
}
/**
* Return the last character in the normalized text. This resets
* the <tt>Normalizer's</tt> position to be just before the
* the input text corresponding to that normalized character.
*/
UChar32 Normalizer::last() {
currentIndex=nextIndex=text->setToEnd();
clearBuffer();
return previous();
}
/**
* Retrieve the current iteration position in the input text that is
* being normalized. This method is useful in applications such as
* searching, where you need to be able to determine the position in
* the input text that corresponds to a given normalized output character.
* <p>
* <b>Note:</b> This method sets the position in the <em>input</em>, while
* {@link #next} and {@link #previous} iterate through characters in the
* <em>output</em>. This means that there is not necessarily a one-to-one
* correspondence between characters returned by <tt>next</tt> and
* <tt>previous</tt> and the indices passed to and returned from
* <tt>setIndex</tt> and {@link #getIndex}.
*
*/
int32_t Normalizer::getIndex() const {
if(bufferPos<buffer.length()) {
return currentIndex;
} else {
return nextIndex;
}
}
/**
* Retrieve the index of the start of the input text. This is the begin index
* of the <tt>CharacterIterator</tt> or the start (i.e. 0) of the <tt>String</tt>
* over which this <tt>Normalizer</tt> is iterating
*/
int32_t Normalizer::startIndex() const {
return text->startIndex();
}
/**
* Retrieve the index of the end of the input text. This is the end index
* of the <tt>CharacterIterator</tt> or the length of the <tt>String</tt>
* over which this <tt>Normalizer</tt> is iterating
*/
int32_t Normalizer::endIndex() const {
return text->endIndex();
}
//-------------------------------------------------------------------------
// Property access methods
//-------------------------------------------------------------------------
void
Normalizer::setMode(UNormalizationMode newMode)
{
fUMode = newMode;
init();
}
UNormalizationMode
Normalizer::getUMode() const
{
return fUMode;
}
void
Normalizer::setOption(int32_t option,
UBool value)
{
if (value) {
fOptions |= option;
} else {
fOptions &= (~option);
}
init();
}
UBool
Normalizer::getOption(int32_t option) const
{
return (fOptions & option) != 0;
}
/**
* Set the input text over which this <tt>Normalizer</tt> will iterate.
* The iteration position is set to the beginning of the input text.
*/
void
Normalizer::setText(const UnicodeString& newText,
UErrorCode &status)
{
if (U_FAILURE(status)) {
return;
}
CharacterIterator *newIter = new StringCharacterIterator(newText);
if (newIter == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
delete text;
text = newIter;
reset();
}
/**
* Set the input text over which this <tt>Normalizer</tt> will iterate.
* The iteration position is set to the beginning of the string.
*/
void
Normalizer::setText(const CharacterIterator& newText,
UErrorCode &status)
{
if (U_FAILURE(status)) {
return;
}
CharacterIterator *newIter = newText.clone();
if (newIter == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
delete text;
text = newIter;
reset();
}
void
Normalizer::setText(const UChar* newText,
int32_t length,
UErrorCode &status)
{
if (U_FAILURE(status)) {
return;
}
CharacterIterator *newIter = new UCharCharacterIterator(newText, length);
if (newIter == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
delete text;
text = newIter;
reset();
}
/**
* Copies the text under iteration into the UnicodeString referred to by "result".
* @param result Receives a copy of the text under iteration.
*/
void
Normalizer::getText(UnicodeString& result)
{
text->getText(result);
}
//-------------------------------------------------------------------------
// Private utility methods
//-------------------------------------------------------------------------
void Normalizer::clearBuffer() {
buffer.remove();
bufferPos=0;
}
UBool
Normalizer::nextNormalize() {
clearBuffer();
currentIndex=nextIndex;
text->setIndex(nextIndex);
if(!text->hasNext()) {
return FALSE;
}
// Skip at least one character so we make progress.
UnicodeString segment(text->next32PostInc());
while(text->hasNext()) {
UChar32 c;
if(fNorm2->hasBoundaryBefore(c=text->next32PostInc())) {
text->move32(-1, CharacterIterator::kCurrent);
break;
}
segment.append(c);
}
nextIndex=text->getIndex();
UErrorCode errorCode=U_ZERO_ERROR;
fNorm2->normalize(segment, buffer, errorCode);
return U_SUCCESS(errorCode) && !buffer.isEmpty();
}
UBool
Normalizer::previousNormalize() {
clearBuffer();
nextIndex=currentIndex;
text->setIndex(currentIndex);
if(!text->hasPrevious()) {
return FALSE;
}
UnicodeString segment;
while(text->hasPrevious()) {
UChar32 c=text->previous32();
segment.insert(0, c);
if(fNorm2->hasBoundaryBefore(c)) {
break;
}
}
currentIndex=text->getIndex();
UErrorCode errorCode=U_ZERO_ERROR;
fNorm2->normalize(segment, buffer, errorCode);
bufferPos=buffer.length();
return U_SUCCESS(errorCode) && !buffer.isEmpty();
}
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_NORMALIZATION */