JDK8/Java8源码在线阅读
/*
* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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*
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/*
*******************************************************************************
* (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved *
* *
* The original version of this source code and documentation is copyrighted *
* and owned by IBM, These materials are provided under terms of a License *
* Agreement between IBM and Sun. This technology is protected by multiple *
* US and International patents. This notice and attribution to IBM may not *
* to removed. *
*******************************************************************************
*/
package sun.text.normalizer;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.BufferedInputStream;
import java.io.InputStream;
/**
* @author Ram Viswanadha
*/
public final class NormalizerImpl {
// Static block for the class to initialize its own self
static final NormalizerImpl IMPL;
static
{
try
{
IMPL = new NormalizerImpl();
}
catch (Exception e)
{
throw new RuntimeException(e.getMessage());
}
}
static final int UNSIGNED_BYTE_MASK =0xFF;
static final long UNSIGNED_INT_MASK = 0xffffffffL;
/*
* This new implementation of the normalization code loads its data from
* unorm.icu, which is generated with the gennorm tool.
* The format of that file is described at the end of this file.
*/
private static final String DATA_FILE_NAME = "/sun/text/resources/unorm.icu";
// norm32 value constants
// quick check flags 0..3 set mean "no" for their forms
public static final int QC_NFC=0x11; /* no|maybe */
public static final int QC_NFKC=0x22; /* no|maybe */
public static final int QC_NFD=4; /* no */
public static final int QC_NFKD=8; /* no */
public static final int QC_ANY_NO=0xf;
/* quick check flags 4..5 mean "maybe" for their forms;
* test flags>=QC_MAYBE
*/
public static final int QC_MAYBE=0x10;
public static final int QC_ANY_MAYBE=0x30;
public static final int QC_MASK=0x3f;
private static final int COMBINES_FWD=0x40;
private static final int COMBINES_BACK=0x80;
public static final int COMBINES_ANY=0xc0;
// UnicodeData.txt combining class in bits 15.
private static final int CC_SHIFT=8;
public static final int CC_MASK=0xff00;
// 16 bits for the index to UChars and other extra data
private static final int EXTRA_SHIFT=16;
/* norm32 value constants using >16 bits */
private static final long MIN_SPECIAL = 0xfc000000 & UNSIGNED_INT_MASK;
private static final long SURROGATES_TOP = 0xfff00000 & UNSIGNED_INT_MASK;
private static final long MIN_HANGUL = 0xfff00000 & UNSIGNED_INT_MASK;
// private static final long MIN_JAMO_V = 0xfff20000 & UNSIGNED_INT_MASK;
private static final long JAMO_V_TOP = 0xfff30000 & UNSIGNED_INT_MASK;
/* indexes[] value names */
/* number of bytes in normalization trie */
static final int INDEX_TRIE_SIZE = 0;
/* number of chars in extra data */
static final int INDEX_CHAR_COUNT = 1;
/* number of uint16_t words for combining data */
static final int INDEX_COMBINE_DATA_COUNT = 2;
/* first code point with quick check NFC NO/MAYBE */
public static final int INDEX_MIN_NFC_NO_MAYBE = 6;
/* first code point with quick check NFKC NO/MAYBE */
public static final int INDEX_MIN_NFKC_NO_MAYBE = 7;
/* first code point with quick check NFD NO/MAYBE */
public static final int INDEX_MIN_NFD_NO_MAYBE = 8;
/* first code point with quick check NFKD NO/MAYBE */
public static final int INDEX_MIN_NFKD_NO_MAYBE = 9;
/* number of bytes in FCD trie */
static final int INDEX_FCD_TRIE_SIZE = 10;
/* number of bytes in the auxiliary trie */
static final int INDEX_AUX_TRIE_SIZE = 11;
/* changing this requires a new formatVersion */
static final int INDEX_TOP = 32;
/* AUX constants */
/* value constants for auxTrie */
private static final int AUX_UNSAFE_SHIFT = 11;
private static final int AUX_COMP_EX_SHIFT = 10;
private static final int AUX_NFC_SKIPPABLE_F_SHIFT = 12;
private static final int AUX_MAX_FNC = 1<<AUX_COMP_EX_SHIFT;
private static final int AUX_UNSAFE_MASK = (int)((1<<AUX_UNSAFE_SHIFT) & UNSIGNED_INT_MASK);
private static final int AUX_FNC_MASK = (int)((AUX_MAX_FNC-1) & UNSIGNED_INT_MASK);
private static final int AUX_COMP_EX_MASK = (int)((1<<AUX_COMP_EX_SHIFT) & UNSIGNED_INT_MASK);
private static final long AUX_NFC_SKIP_F_MASK = ((UNSIGNED_INT_MASK&1)<<AUX_NFC_SKIPPABLE_F_SHIFT);
private static final int MAX_BUFFER_SIZE = 20;
/*******************************/
/* Wrappers for Trie implementations */
static final class NormTrieImpl implements Trie.DataManipulate{
static IntTrie normTrie= null;
/**
* Called by com.ibm.icu.util.Trie to extract from a lead surrogate's
* data the index array offset of the indexes for that lead surrogate.
* @param property data value for a surrogate from the trie, including
* the folding offset
* @return data offset or 0 if there is no data for the lead surrogate
*/
/* normTrie: 32-bit trie result may contain a special extraData index with the folding offset */
public int getFoldingOffset(int value){
return BMP_INDEX_LENGTH+
((value>>(EXTRA_SHIFT-SURROGATE_BLOCK_BITS))&
(0x3ff<<SURROGATE_BLOCK_BITS));
}
}
static final class FCDTrieImpl implements Trie.DataManipulate{
static CharTrie fcdTrie=null;
/**
* Called by com.ibm.icu.util.Trie to extract from a lead surrogate's
* data the index array offset of the indexes for that lead surrogate.
* @param property data value for a surrogate from the trie, including
* the folding offset
* @return data offset or 0 if there is no data for the lead surrogate
*/
/* fcdTrie: the folding offset is the lead FCD value itself */
public int getFoldingOffset(int value){
return value;
}
}
static final class AuxTrieImpl implements Trie.DataManipulate{
static CharTrie auxTrie = null;
/**
* Called by com.ibm.icu.util.Trie to extract from a lead surrogate's
* data the index array offset of the indexes for that lead surrogate.
* @param property data value for a surrogate from the trie, including
* the folding offset
* @return data offset or 0 if there is no data for the lead surrogate
*/
/* auxTrie: the folding offset is in bits 9..0 of the 16-bit trie result */
public int getFoldingOffset(int value){
return (value &AUX_FNC_MASK)<<SURROGATE_BLOCK_BITS;
}
}
/****************************************************/
private static FCDTrieImpl fcdTrieImpl;
private static NormTrieImpl normTrieImpl;
private static AuxTrieImpl auxTrieImpl;
private static int[] indexes;
private static char[] combiningTable;
private static char[] extraData;
private static boolean isDataLoaded;
private static boolean isFormatVersion_2_1;
private static boolean isFormatVersion_2_2;
private static byte[] unicodeVersion;
/**
* Default buffer size of datafile
*/
private static final int DATA_BUFFER_SIZE = 25000;
/**
* FCD check: everything below this code point is known to have a 0
* lead combining class
*/
public static final int MIN_WITH_LEAD_CC=0x300;
/**
* Bit 7 of the length byte for a decomposition string in extra data is
* a flag indicating whether the decomposition string is
* preceded by a 16-bit word with the leading and trailing cc
* of the decomposition (like for A-umlaut);
* if not, then both cc's are zero (like for compatibility ideographs).
*/
private static final int DECOMP_FLAG_LENGTH_HAS_CC=0x80;
/**
* Bits 6..0 of the length byte contain the actual length.
*/
private static final int DECOMP_LENGTH_MASK=0x7f;
/** Length of the BMP portion of the index (stage 1) array. */
private static final int BMP_INDEX_LENGTH=0x10000>>Trie.INDEX_STAGE_1_SHIFT_;
/** Number of bits of a trail surrogate that are used in index table
* lookups.
*/
private static final int SURROGATE_BLOCK_BITS=10-Trie.INDEX_STAGE_1_SHIFT_;
// public utility
public static int getFromIndexesArr(int index){
return indexes[index];
}
// protected constructor ---------------------------------------------
/**
* Constructor
* @exception thrown when data reading fails or data corrupted
*/
private NormalizerImpl() throws IOException {
//data should be loaded only once
if(!isDataLoaded){
// jar access
InputStream i = ICUData.getRequiredStream(DATA_FILE_NAME);
BufferedInputStream b = new BufferedInputStream(i,DATA_BUFFER_SIZE);
NormalizerDataReader reader = new NormalizerDataReader(b);
// read the indexes
indexes = reader.readIndexes(NormalizerImpl.INDEX_TOP);
byte[] normBytes = new byte[indexes[NormalizerImpl.INDEX_TRIE_SIZE]];
int combiningTableTop = indexes[NormalizerImpl.INDEX_COMBINE_DATA_COUNT];
combiningTable = new char[combiningTableTop];
int extraDataTop = indexes[NormalizerImpl.INDEX_CHAR_COUNT];
extraData = new char[extraDataTop];
byte[] fcdBytes = new byte[indexes[NormalizerImpl.INDEX_FCD_TRIE_SIZE]];
byte[] auxBytes = new byte[indexes[NormalizerImpl.INDEX_AUX_TRIE_SIZE]];
fcdTrieImpl = new FCDTrieImpl();
normTrieImpl = new NormTrieImpl();
auxTrieImpl = new AuxTrieImpl();
// load the rest of the data data and initialize the data members
reader.read(normBytes, fcdBytes,auxBytes, extraData, combiningTable);
NormTrieImpl.normTrie = new IntTrie( new ByteArrayInputStream(normBytes),normTrieImpl );
FCDTrieImpl.fcdTrie = new CharTrie( new ByteArrayInputStream(fcdBytes),fcdTrieImpl );
AuxTrieImpl.auxTrie = new CharTrie( new ByteArrayInputStream(auxBytes),auxTrieImpl );
// we reached here without any exceptions so the data is fully
// loaded set the variable to true
isDataLoaded = true;
// get the data format version
byte[] formatVersion = reader.getDataFormatVersion();
isFormatVersion_2_1 =( formatVersion[0]>2
||
(formatVersion[0]==2 && formatVersion[1]>=1)
);
isFormatVersion_2_2 =( formatVersion[0]>2
||
(formatVersion[0]==2 && formatVersion[1]>=2)
);
unicodeVersion = reader.getUnicodeVersion();
b.close();
}
}
/* ---------------------------------------------------------------------- */
/* Korean Hangul and Jamo constants */
public static final int JAMO_L_BASE=0x1100; /* "lead" jamo */
public static final int JAMO_V_BASE=0x1161; /* "vowel" jamo */
public static final int JAMO_T_BASE=0x11a7; /* "trail" jamo */
public static final int HANGUL_BASE=0xac00;
public static final int JAMO_L_COUNT=19;
public static final int JAMO_V_COUNT=21;
public static final int JAMO_T_COUNT=28;
public static final int HANGUL_COUNT=JAMO_L_COUNT*JAMO_V_COUNT*JAMO_T_COUNT;
private static boolean isHangulWithoutJamoT(char c) {
c-=HANGUL_BASE;
return c<HANGUL_COUNT && c%JAMO_T_COUNT==0;
}
/* norm32 helpers */
/* is this a norm32 with a regular index? */
private static boolean isNorm32Regular(long norm32) {
return norm32<MIN_SPECIAL;
}
/* is this a norm32 with a special index for a lead surrogate? */
private static boolean isNorm32LeadSurrogate(long norm32) {
return MIN_SPECIAL<=norm32 && norm32<SURROGATES_TOP;
}
/* is this a norm32 with a special index for a Hangul syllable or a Jamo? */
private static boolean isNorm32HangulOrJamo(long norm32) {
return norm32>=MIN_HANGUL;
}
/*
* Given norm32 for Jamo V or T,
* is this a Jamo V?
*/
private static boolean isJamoVTNorm32JamoV(long norm32) {
return norm32<JAMO_V_TOP;
}
/* data access primitives ----------------------------------------------- */
public static long/*unsigned*/ getNorm32(char c) {
return ((UNSIGNED_INT_MASK) & (NormTrieImpl.normTrie.getLeadValue(c)));
}
public static long/*unsigned*/ getNorm32FromSurrogatePair(long norm32,
char c2) {
/*
* the surrogate index in norm32 stores only the number of the surrogate
* index block see gennorm/store.c/getFoldedNormValue()
*/
return ((UNSIGNED_INT_MASK) &
NormTrieImpl.normTrie.getTrailValue((int)norm32, c2));
}
///CLOVER:OFF
private static long getNorm32(int c){
return (UNSIGNED_INT_MASK&(NormTrieImpl.normTrie.getCodePointValue(c)));
}
/*
* get a norm32 from text with complete code points
* (like from decompositions)
*/
private static long/*unsigned*/ getNorm32(char[] p,int start,
int/*unsigned*/ mask) {
long/*unsigned*/ norm32= getNorm32(p[start]);
if(((norm32&mask)>0) && isNorm32LeadSurrogate(norm32)) {
/* *p is a lead surrogate, get the real norm32 */
norm32=getNorm32FromSurrogatePair(norm32, p[start+1]);
}
return norm32;
}
//// for StringPrep
public static VersionInfo getUnicodeVersion(){
return VersionInfo.getInstance(unicodeVersion[0], unicodeVersion[1],
unicodeVersion[2], unicodeVersion[3]);
}
public static char getFCD16(char c) {
return FCDTrieImpl.fcdTrie.getLeadValue(c);
}
public static char getFCD16FromSurrogatePair(char fcd16, char c2) {
/* the surrogate index in fcd16 is an absolute offset over the
* start of stage 1
* */
return FCDTrieImpl.fcdTrie.getTrailValue(fcd16, c2);
}
public static int getFCD16(int c) {
return FCDTrieImpl.fcdTrie.getCodePointValue(c);
}
private static int getExtraDataIndex(long norm32) {
return (int)(norm32>>EXTRA_SHIFT);
}
private static final class DecomposeArgs{
int /*unsigned byte*/ cc;
int /*unsigned byte*/ trailCC;
int length;
}
/**
*
* get the canonical or compatibility decomposition for one character
*
* @return index into the extraData array
*/
private static int/*index*/ decompose(long/*unsigned*/ norm32,
int/*unsigned*/ qcMask,
DecomposeArgs args) {
int p= getExtraDataIndex(norm32);
args.length=extraData[p++];
if((norm32&qcMask&QC_NFKD)!=0 && args.length>=0x100) {
/* use compatibility decomposition, skip canonical data */
p+=((args.length>>7)&1)+(args.length&DECOMP_LENGTH_MASK);
args.length>>=8;
}
if((args.length&DECOMP_FLAG_LENGTH_HAS_CC)>0) {
/* get the lead and trail cc's */
char bothCCs=extraData[p++];
args.cc=(UNSIGNED_BYTE_MASK) & (bothCCs>>8);
args.trailCC=(UNSIGNED_BYTE_MASK) & bothCCs;
} else {
/* lead and trail cc's are both 0 */
args.cc=args.trailCC=0;
}
args.length&=DECOMP_LENGTH_MASK;
return p;
}
/**
* get the canonical decomposition for one character
* @return index into the extraData array
*/
private static int decompose(long/*unsigned*/ norm32,
DecomposeArgs args) {
int p= getExtraDataIndex(norm32);
args.length=extraData[p++];
if((args.length&DECOMP_FLAG_LENGTH_HAS_CC)>0) {
/* get the lead and trail cc's */
char bothCCs=extraData[p++];
args.cc=(UNSIGNED_BYTE_MASK) & (bothCCs>>8);
args.trailCC=(UNSIGNED_BYTE_MASK) & bothCCs;
} else {
/* lead and trail cc's are both 0 */
args.cc=args.trailCC=0;
}
args.length&=DECOMP_LENGTH_MASK;
return p;
}
private static final class NextCCArgs{
char[] source;
int next;
int limit;
char c;
char c2;
}
/*
* get the combining class of (c, c2)= args.source[args.next++]
* before: args.next<args.limit after: args.next<=args.limit
* if only one code unit is used, then c2==0
*/
private static int /*unsigned byte*/ getNextCC(NextCCArgs args) {
long /*unsigned*/ norm32;
args.c=args.source[args.next++];
norm32= getNorm32(args.c);
if((norm32 & CC_MASK)==0) {
args.c2=0;
return 0;
} else {
if(!isNorm32LeadSurrogate(norm32)) {
args.c2=0;
} else {
/* c is a lead surrogate, get the real norm32 */
if(args.next!=args.limit &&
UTF16.isTrailSurrogate(args.c2=args.source[args.next])){
++args.next;
norm32=getNorm32FromSurrogatePair(norm32, args.c2);
} else {
args.c2=0;
return 0;
}
}
return (int)((UNSIGNED_BYTE_MASK) & (norm32>>CC_SHIFT));
}
}
private static final class PrevArgs{
char[] src;
int start;
int current;
char c;
char c2;
}
/*
* read backwards and get norm32
* return 0 if the character is <minC
* if c2!=0 then (c2, c) is a surrogate pair (reversed - c2 is first
* surrogate but read second!)
*/
private static long /*unsigned*/ getPrevNorm32(PrevArgs args,
int/*unsigned*/ minC,
int/*unsigned*/ mask) {
long/*unsigned*/ norm32;
args.c=args.src[--args.current];
args.c2=0;
/* check for a surrogate before getting norm32 to see if we need to
* predecrement further
*/
if(args.c<minC) {
return 0;
} else if(!UTF16.isSurrogate(args.c)) {
return getNorm32(args.c);
} else if(UTF16.isLeadSurrogate(args.c)) {
/* unpaired first surrogate */
return 0;
} else if(args.current!=args.start &&
UTF16.isLeadSurrogate(args.c2=args.src[args.current-1])) {
--args.current;
norm32=getNorm32(args.c2);
if((norm32&mask)==0) {
/* all surrogate pairs with this lead surrogate have
* only irrelevant data
*/
return 0;
} else {
/* norm32 must be a surrogate special */
return getNorm32FromSurrogatePair(norm32, args.c);
}
} else {
/* unpaired second surrogate */
args.c2=0;
return 0;
}
}
/*
* get the combining class of (c, c2)=*--p
* before: start<p after: start<=p
*/
private static int /*unsigned byte*/ getPrevCC(PrevArgs args) {
return (int)((UNSIGNED_BYTE_MASK)&(getPrevNorm32(args, MIN_WITH_LEAD_CC,
CC_MASK)>>CC_SHIFT));
}
/*
* is this a safe boundary character for NF*D?
* (lead cc==0)
*/
public static boolean isNFDSafe(long/*unsigned*/ norm32,
int/*unsigned*/ccOrQCMask,
int/*unsigned*/ decompQCMask) {
if((norm32&ccOrQCMask)==0) {
return true; /* cc==0 and no decomposition: this is NF*D safe */
}
/* inspect its decomposition - maybe a Hangul but not a surrogate here*/
if(isNorm32Regular(norm32) && (norm32&decompQCMask)!=0) {
DecomposeArgs args=new DecomposeArgs();
/* decomposes, get everything from the variable-length extra data */
decompose(norm32, decompQCMask, args);
return args.cc==0;
} else {
/* no decomposition (or Hangul), test the cc directly */
return (norm32&CC_MASK)==0;
}
}
/*
* is this (or does its decomposition begin with) a "true starter"?
* (cc==0 and NF*C_YES)
*/
public static boolean isTrueStarter(long/*unsigned*/ norm32,
int/*unsigned*/ ccOrQCMask,
int/*unsigned*/ decompQCMask) {
if((norm32&ccOrQCMask)==0) {
return true; /* this is a true starter (could be Hangul or Jamo L)*/
}
/* inspect its decomposition - not a Hangul or a surrogate here */
if((norm32&decompQCMask)!=0) {
int p; /* index into extra data array */
DecomposeArgs args=new DecomposeArgs();
/* decomposes, get everything from the variable-length extra data */
p=decompose(norm32, decompQCMask, args);
if(args.cc==0) {
int/*unsigned*/ qcMask=ccOrQCMask&QC_MASK;
/* does it begin with NFC_YES? */
if((getNorm32(extraData,p, qcMask)&qcMask)==0) {
/* yes, the decomposition begins with a true starter */
return true;
}
}
}
return false;
}
/* reorder UTF-16 in-place ---------------------------------------------- */
/**
* simpler, single-character version of mergeOrdered() -
* bubble-insert one single code point into the preceding string
* which is already canonically ordered
* (c, c2) may or may not yet have been inserted at src[current]..src[p]
*
* it must be p=current+lengthof(c, c2) i.e. p=current+(c2==0 ? 1 : 2)
*
* before: src[start]..src[current] is already ordered, and
* src[current]..src[p] may or may not hold (c, c2) but
* must be exactly the same length as (c, c2)
* after: src[start]..src[p] is ordered
*
* @return the trailing combining class
*/
private static int/*unsigned byte*/ insertOrdered(char[] source,
int start,
int current, int p,
char c, char c2,
int/*unsigned byte*/ cc) {
int back, preBack;
int r;
int prevCC, trailCC=cc;
if(start<current && cc!=0) {
// search for the insertion point where cc>=prevCC
preBack=back=current;
PrevArgs prevArgs = new PrevArgs();
prevArgs.current = current;
prevArgs.start = start;
prevArgs.src = source;
// get the prevCC
prevCC=getPrevCC(prevArgs);
preBack = prevArgs.current;
if(cc<prevCC) {
// this will be the last code point, so keep its cc
trailCC=prevCC;
back=preBack;
while(start<preBack) {
prevCC=getPrevCC(prevArgs);
preBack=prevArgs.current;
if(cc>=prevCC) {
break;
}
back=preBack;
}
// this is where we are right now with all these indicies:
// [start]..[pPreBack] 0..? code points that we can ignore
// [pPreBack]..[pBack] 0..1 code points with prevCC<=cc
// [pBack]..[current] 0..n code points with >cc, move up to insert (c, c2)
// [current]..[p] 1 code point (c, c2) with cc
// move the code units in between up
r=p;
do {
source[--r]=source[--current];
} while(back!=current);
}
}
// insert (c, c2)
source[current]=c;
if(c2!=0) {
source[(current+1)]=c2;
}
// we know the cc of the last code point
return trailCC;
}
/**
* merge two UTF-16 string parts together
* to canonically order (order by combining classes) their concatenation
*
* the two strings may already be adjacent, so that the merging is done
* in-place if the two strings are not adjacent, then the buffer holding the
* first one must be large enough
* the second string may or may not be ordered in itself
*
* before: [start]..[current] is already ordered, and
* [next]..[limit] may be ordered in itself, but
* is not in relation to [start..current[
* after: [start..current+(limit-next)[ is ordered
*
* the algorithm is a simple bubble-sort that takes the characters from
* src[next++] and inserts them in correct combining class order into the
* preceding part of the string
*
* since this function is called much less often than the single-code point
* insertOrdered(), it just uses that for easier maintenance
*
* @return the trailing combining class
*/
private static int /*unsigned byte*/ mergeOrdered(char[] source,
int start,
int current,
char[] data,
int next,
int limit,
boolean isOrdered) {
int r;
int /*unsigned byte*/ cc, trailCC=0;
boolean adjacent;
adjacent= current==next;
NextCCArgs ncArgs = new NextCCArgs();
ncArgs.source = data;
ncArgs.next = next;
ncArgs.limit = limit;
if(start!=current || !isOrdered) {
while(ncArgs.next<ncArgs.limit) {
cc=getNextCC(ncArgs);
if(cc==0) {
// does not bubble back
trailCC=0;
if(adjacent) {
current=ncArgs.next;
} else {
data[current++]=ncArgs.c;
if(ncArgs.c2!=0) {
data[current++]=ncArgs.c2;
}
}
if(isOrdered) {
break;
} else {
start=current;
}
} else {
r=current+(ncArgs.c2==0 ? 1 : 2);
trailCC=insertOrdered(source,start, current, r,
ncArgs.c, ncArgs.c2, cc);
current=r;
}
}
}
if(ncArgs.next==ncArgs.limit) {
// we know the cc of the last code point
return trailCC;
} else {
if(!adjacent) {
// copy the second string part
do {
source[current++]=data[ncArgs.next++];
} while(ncArgs.next!=ncArgs.limit);
ncArgs.limit=current;
}
PrevArgs prevArgs = new PrevArgs();
prevArgs.src = data;
prevArgs.start = start;
prevArgs.current = ncArgs.limit;
return getPrevCC(prevArgs);
}
}
private static int /*unsigned byte*/ mergeOrdered(char[] source,
int start,
int current,
char[] data,
final int next,
final int limit) {
return mergeOrdered(source,start,current,data,next,limit,true);
}
public static NormalizerBase.QuickCheckResult quickCheck(char[] src,
int srcStart,
int srcLimit,
int minNoMaybe,
int qcMask,
int options,
boolean allowMaybe,
UnicodeSet nx){
int ccOrQCMask;
long norm32;
char c, c2;
char cc, prevCC;
long qcNorm32;
NormalizerBase.QuickCheckResult result;
ComposePartArgs args = new ComposePartArgs();
char[] buffer ;
int start = srcStart;
if(!isDataLoaded) {
return NormalizerBase.MAYBE;
}
// initialize
ccOrQCMask=CC_MASK|qcMask;
result=NormalizerBase.YES;
prevCC=0;
for(;;) {
for(;;) {
if(srcStart==srcLimit) {
return result;
} else if((c=src[srcStart++])>=minNoMaybe &&
(( norm32=getNorm32(c)) & ccOrQCMask)!=0) {
break;
}
prevCC=0;
}
// check one above-minimum, relevant code unit
if(isNorm32LeadSurrogate(norm32)) {
// c is a lead surrogate, get the real norm32
if(srcStart!=srcLimit&& UTF16.isTrailSurrogate(c2=src[srcStart])) {
++srcStart;
norm32=getNorm32FromSurrogatePair(norm32,c2);
} else {
norm32=0;
c2=0;
}
}else{
c2=0;
}
if(nx_contains(nx, c, c2)) {
/* excluded: norm32==0 */
norm32=0;
}
// check the combining order
cc=(char)((norm32>>CC_SHIFT)&0xFF);
if(cc!=0 && cc<prevCC) {
return NormalizerBase.NO;
}
prevCC=cc;
// check for "no" or "maybe" quick check flags
qcNorm32 = norm32 & qcMask;
if((qcNorm32& QC_ANY_NO)>=1) {
result= NormalizerBase.NO;
break;
} else if(qcNorm32!=0) {
// "maybe" can only occur for NFC and NFKC
if(allowMaybe){
result=NormalizerBase.MAYBE;
}else{
// normalize a section around here to see if it is really
// normalized or not
int prevStarter;
int/*unsigned*/ decompQCMask;
decompQCMask=(qcMask<<2)&0xf; // decomposition quick check mask
// find the previous starter
// set prevStarter to the beginning of the current character
prevStarter=srcStart-1;
if(UTF16.isTrailSurrogate(src[prevStarter])) {
// safe because unpaired surrogates do not result
// in "maybe"
--prevStarter;
}
prevStarter=findPreviousStarter(src, start, prevStarter,
ccOrQCMask, decompQCMask,
(char)minNoMaybe);
// find the next true starter in [src..limit[ - modifies
// src to point to the next starter
srcStart=findNextStarter(src,srcStart, srcLimit, qcMask,
decompQCMask,(char) minNoMaybe);
//set the args for compose part
args.prevCC = prevCC;
// decompose and recompose [prevStarter..src[
buffer = composePart(args,prevStarter,src,srcStart,srcLimit,options,nx);
// compare the normalized version with the original
if(0!=strCompare(buffer,0,args.length,src,prevStarter,srcStart, false)) {
result=NormalizerBase.NO; // normalization differs
break;
}
// continue after the next starter
}
}
}
return result;
}
//------------------------------------------------------
// make NFD & NFKD
//------------------------------------------------------
public static int decompose(char[] src,int srcStart,int srcLimit,
char[] dest,int destStart,int destLimit,
boolean compat,int[] outTrailCC,
UnicodeSet nx) {
char[] buffer = new char[3];
int prevSrc;
long norm32;
int ccOrQCMask, qcMask;
int reorderStartIndex, length;
char c, c2, minNoMaybe;
int/*unsigned byte*/ cc, prevCC, trailCC;
char[] p;
int pStart;
int destIndex = destStart;
int srcIndex = srcStart;
if(!compat) {
minNoMaybe=(char)indexes[INDEX_MIN_NFD_NO_MAYBE];
qcMask=QC_NFD;
} else {
minNoMaybe=(char)indexes[INDEX_MIN_NFKD_NO_MAYBE];
qcMask=QC_NFKD;
}
/* initialize */
ccOrQCMask=CC_MASK|qcMask;
reorderStartIndex=0;
prevCC=0;
norm32=0;
c=0;
pStart=0;
cc=trailCC=-1;//initialize to bogus value
for(;;) {
/* count code units below the minimum or with irrelevant data for
* the quick check
*/
prevSrc=srcIndex;
while(srcIndex!=srcLimit &&((c=src[srcIndex])<minNoMaybe ||
((norm32=getNorm32(c))&ccOrQCMask)==0)){
prevCC=0;
++srcIndex;
}
/* copy these code units all at once */
if(srcIndex!=prevSrc) {
length=srcIndex-prevSrc;
if((destIndex+length)<=destLimit) {
System.arraycopy(src,prevSrc,dest,destIndex,length);
}
destIndex+=length;
reorderStartIndex=destIndex;
}
/* end of source reached? */
if(srcIndex==srcLimit) {
break;
}
/* c already contains *src and norm32 is set for it, increment src*/
++srcIndex;
/* check one above-minimum, relevant code unit */
/*
* generally, set p and length to the decomposition string
* in simple cases, p==NULL and (c, c2) will hold the length code
* units to append in all cases, set cc to the lead and trailCC to
* the trail combining class
*
* the following merge-sort of the current character into the
* preceding, canonically ordered result text will use the
* optimized insertOrdered()
* if there is only one single code point to process;
* this is indicated with p==NULL, and (c, c2) is the character to
* insert
* ((c, 0) for a BMP character and (lead surrogate, trail surrogate)
* for a supplementary character)
* otherwise, p[length] is merged in with _mergeOrdered()
*/
if(isNorm32HangulOrJamo(norm32)) {
if(nx_contains(nx, c)) {
c2=0;
p=null;
length=1;
} else {
// Hangul syllable: decompose algorithmically
p=buffer;
pStart=0;
cc=trailCC=0;
c-=HANGUL_BASE;
c2=(char)(c%JAMO_T_COUNT);
c/=JAMO_T_COUNT;
if(c2>0) {
buffer[2]=(char)(JAMO_T_BASE+c2);
length=3;
} else {
length=2;
}
buffer[1]=(char)(JAMO_V_BASE+c%JAMO_V_COUNT);
buffer[0]=(char)(JAMO_L_BASE+c/JAMO_V_COUNT);
}
} else {
if(isNorm32Regular(norm32)) {
c2=0;
length=1;
} else {
// c is a lead surrogate, get the real norm32
if(srcIndex!=srcLimit &&
UTF16.isTrailSurrogate(c2=src[srcIndex])) {
++srcIndex;
length=2;
norm32=getNorm32FromSurrogatePair(norm32, c2);
} else {
c2=0;
length=1;
norm32=0;
}
}
/* get the decomposition and the lead and trail cc's */
if(nx_contains(nx, c, c2)) {
/* excluded: norm32==0 */
cc=trailCC=0;
p=null;
} else if((norm32&qcMask)==0) {
/* c does not decompose */
cc=trailCC=(int)((UNSIGNED_BYTE_MASK) & (norm32>>CC_SHIFT));
p=null;
pStart=-1;
} else {
DecomposeArgs arg = new DecomposeArgs();
/* c decomposes, get everything from the variable-length
* extra data
*/
pStart=decompose(norm32, qcMask, arg);
p=extraData;
length=arg.length;
cc=arg.cc;
trailCC=arg.trailCC;
if(length==1) {
/* fastpath a single code unit from decomposition */
c=p[pStart];
c2=0;
p=null;
pStart=-1;
}
}
}
/* append the decomposition to the destination buffer, assume
* length>0
*/
if((destIndex+length)<=destLimit) {
int reorderSplit=destIndex;
if(p==null) {
/* fastpath: single code point */
if(cc!=0 && cc<prevCC) {
/* (c, c2) is out of order with respect to the preceding
* text
*/
destIndex+=length;
trailCC=insertOrdered(dest,reorderStartIndex,
reorderSplit, destIndex, c, c2, cc);
} else {
/* just append (c, c2) */
dest[destIndex++]=c;
if(c2!=0) {
dest[destIndex++]=c2;
}
}
} else {
/* general: multiple code points (ordered by themselves)
* from decomposition
*/
if(cc!=0 && cc<prevCC) {
/* the decomposition is out of order with respect to the
* preceding text
*/
destIndex+=length;
trailCC=mergeOrdered(dest,reorderStartIndex,
reorderSplit,p, pStart,pStart+length);
} else {
/* just append the decomposition */
do {
dest[destIndex++]=p[pStart++];
} while(--length>0);
}
}
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
destIndex+=length;
}
prevCC=trailCC;
if(prevCC==0) {
reorderStartIndex=destIndex;
}
}
outTrailCC[0]=prevCC;
return destIndex - destStart;
}
/* make NFC & NFKC ------------------------------------------------------ */
private static final class NextCombiningArgs{
char[] source;
int start;
//int limit;
char c;
char c2;
int/*unsigned*/ combiningIndex;
char /*unsigned byte*/ cc;
}
/* get the composition properties of the next character */
private static int /*unsigned*/ getNextCombining(NextCombiningArgs args,
int limit,
UnicodeSet nx) {
long/*unsigned*/ norm32;
int combineFlags;
/* get properties */
args.c=args.source[args.start++];
norm32=getNorm32(args.c);
/* preset output values for most characters */
args.c2=0;
args.combiningIndex=0;
args.cc=0;
if((norm32&(CC_MASK|COMBINES_ANY))==0) {
return 0;
} else {
if(isNorm32Regular(norm32)) {
/* set cc etc. below */
} else if(isNorm32HangulOrJamo(norm32)) {
/* a compatibility decomposition contained Jamos */
args.combiningIndex=(int)((UNSIGNED_INT_MASK)&(0xfff0|
(norm32>>EXTRA_SHIFT)));
return (int)(norm32&COMBINES_ANY);
} else {
/* c is a lead surrogate, get the real norm32 */
if(args.start!=limit && UTF16.isTrailSurrogate(args.c2=
args.source[args.start])) {
++args.start;
norm32=getNorm32FromSurrogatePair(norm32, args.c2);
} else {
args.c2=0;
return 0;
}
}
if(nx_contains(nx, args.c, args.c2)) {
return 0; /* excluded: norm32==0 */
}
args.cc= (char)((norm32>>CC_SHIFT)&0xff);
combineFlags=(int)(norm32&COMBINES_ANY);
if(combineFlags!=0) {
int index = getExtraDataIndex(norm32);
args.combiningIndex=index>0 ? extraData[(index-1)] :0;
}
return combineFlags;
}
}
/*
* given a composition-result starter (c, c2) - which means its cc==0,
* it combines forward, it has extra data, its norm32!=0,
* it is not a Hangul or Jamo,
* get just its combineFwdIndex
*
* norm32(c) is special if and only if c2!=0
*/
private static int/*unsigned*/ getCombiningIndexFromStarter(char c,char c2){
long/*unsigned*/ norm32;
norm32=getNorm32(c);
if(c2!=0) {
norm32=getNorm32FromSurrogatePair(norm32, c2);
}
return extraData[(getExtraDataIndex(norm32)-1)];
}
/*
* Find the recomposition result for
* a forward-combining character
* (specified with a pointer to its part of the combiningTable[])
* and a backward-combining character
* (specified with its combineBackIndex).
*
* If these two characters combine, then set (value, value2)
* with the code unit(s) of the composition character.
*
* Return value:
* 0 do not combine
* 1 combine
* >1 combine, and the composition is a forward-combining starter
*
* See unormimp.h for a description of the composition table format.
*/
private static int/*unsigned*/ combine(char[]table,int tableStart,
int/*unsinged*/ combineBackIndex,
int[] outValues) {
int/*unsigned*/ key;
int value,value2;
if(outValues.length<2){
throw new IllegalArgumentException();
}
/* search in the starter's composition table */
for(;;) {
key=table[tableStart++];
if(key>=combineBackIndex) {
break;
}
tableStart+= ((table[tableStart]&0x8000) != 0)? 2 : 1;
}
/* mask off bit 15, the last-entry-in-the-list flag */
if((key&0x7fff)==combineBackIndex) {
/* found! combine! */
value=table[tableStart];
/* is the composition a starter that combines forward? */
key=(int)((UNSIGNED_INT_MASK)&((value&0x2000)+1));
/* get the composition result code point from the variable-length
* result value
*/
if((value&0x8000) != 0) {
if((value&0x4000) != 0) {
/* surrogate pair composition result */
value=(int)((UNSIGNED_INT_MASK)&((value&0x3ff)|0xd800));
value2=table[tableStart+1];
} else {
/* BMP composition result U+2000..U+ffff */
value=table[tableStart+1];
value2=0;
}
} else {
/* BMP composition result U+0000..U+1fff */
value&=0x1fff;
value2=0;
}
outValues[0]=value;
outValues[1]=value2;
return key;
} else {
/* not found */
return 0;
}
}
private static final class RecomposeArgs{
char[] source;
int start;
int limit;
}
/*
* recompose the characters in [p..limit[
* (which is in NFD - decomposed and canonically ordered),
* adjust limit, and return the trailing cc
*
* since for NFKC we may get Jamos in decompositions, we need to
* recompose those too
*
* note that recomposition never lengthens the text:
* any character consists of either one or two code units;
* a composition may contain at most one more code unit than the original
* starter, while the combining mark that is removed has at least one code
* unit
*/
private static char/*unsigned byte*/ recompose(RecomposeArgs args, int options, UnicodeSet nx) {
int remove, q, r;
int /*unsigned*/ combineFlags;
int /*unsigned*/ combineFwdIndex, combineBackIndex;
int /*unsigned*/ result, value=0, value2=0;
int /*unsigned byte*/ prevCC;
boolean starterIsSupplementary;
int starter;
int[] outValues = new int[2];
starter=-1; /* no starter */
combineFwdIndex=0; /* will not be used until starter!=NULL */
starterIsSupplementary=false; /* will not be used until starter!=NULL */
prevCC=0;
NextCombiningArgs ncArg = new NextCombiningArgs();
ncArg.source = args.source;
ncArg.cc =0;
ncArg.c2 =0;
for(;;) {
ncArg.start = args.start;
combineFlags=getNextCombining(ncArg,args.limit,nx);
combineBackIndex=ncArg.combiningIndex;
args.start = ncArg.start;
if(((combineFlags&COMBINES_BACK)!=0) && starter!=-1) {
if((combineBackIndex&0x8000)!=0) {
/* c is a Jamo V/T, see if we can compose it with the
* previous character
*/
/* for the PRI #29 fix, check that there is no intervening combining mark */
if((options&BEFORE_PRI_29)!=0 || prevCC==0) {
remove=-1; /* NULL while no Hangul composition */
combineFlags=0;
ncArg.c2=args.source[starter];
if(combineBackIndex==0xfff2) {
/* Jamo V, compose with previous Jamo L and following
* Jamo T
*/
ncArg.c2=(char)(ncArg.c2-JAMO_L_BASE);
if(ncArg.c2<JAMO_L_COUNT) {
remove=args.start-1;
ncArg.c=(char)(HANGUL_BASE+(ncArg.c2*JAMO_V_COUNT+
(ncArg.c-JAMO_V_BASE))*JAMO_T_COUNT);
if(args.start!=args.limit &&
(ncArg.c2=(char)(args.source[args.start]
-JAMO_T_BASE))<JAMO_T_COUNT) {
++args.start;
ncArg.c+=ncArg.c2;
} else {
/* the result is an LV syllable, which is a starter (unlike LVT) */
combineFlags=COMBINES_FWD;
}
if(!nx_contains(nx, ncArg.c)) {
args.source[starter]=ncArg.c;
} else {
/* excluded */
if(!isHangulWithoutJamoT(ncArg.c)) {
--args.start; /* undo the ++args.start from reading the Jamo T */
}
/* c is modified but not used any more -- c=*(p-1); -- re-read the Jamo V/T */
remove=args.start;
}
}
/*
* Normally, the following can not occur:
* Since the input is in NFD, there are no Hangul LV syllables that
* a Jamo T could combine with.
* All Jamo Ts are combined above when handling Jamo Vs.
*
* However, before the PRI #29 fix, this can occur due to
* an intervening combining mark between the Hangul LV and the Jamo T.
*/
} else {
/* Jamo T, compose with previous Hangul that does not have a Jamo T */
if(isHangulWithoutJamoT(ncArg.c2)) {
ncArg.c2+=ncArg.c-JAMO_T_BASE;
if(!nx_contains(nx, ncArg.c2)) {
remove=args.start-1;
args.source[starter]=ncArg.c2;
}
}
}
if(remove!=-1) {
/* remove the Jamo(s) */
q=remove;
r=args.start;
while(r<args.limit) {
args.source[q++]=args.source[r++];
}
args.start=remove;
args.limit=q;
}
ncArg.c2=0; /* c2 held *starter temporarily */
if(combineFlags!=0) {
/*
* not starter=NULL because the composition is a Hangul LV syllable
* and might combine once more (but only before the PRI #29 fix)
*/
/* done? */
if(args.start==args.limit) {
return (char)prevCC;
}
/* the composition is a Hangul LV syllable which is a starter that combines forward */
combineFwdIndex=0xfff0;
/* we combined; continue with looking for compositions */
continue;
}
}
/*
* now: cc==0 and the combining index does not include
* "forward" -> the rest of the loop body will reset starter
* to NULL; technically, a composed Hangul syllable is a
* starter, but it does not combine forward now that we have
* consumed all eligible Jamos; for Jamo V/T, combineFlags
* does not contain _NORM_COMBINES_FWD
*/
} else if(
/* the starter is not a Hangul LV or Jamo V/T and */
!((combineFwdIndex&0x8000)!=0) &&
/* the combining mark is not blocked and */
((options&BEFORE_PRI_29)!=0 ?
(prevCC!=ncArg.cc || prevCC==0) :
(prevCC<ncArg.cc || prevCC==0)) &&
/* the starter and the combining mark (c, c2) do combine */
0!=(result=combine(combiningTable,combineFwdIndex,
combineBackIndex, outValues)) &&
/* the composition result is not excluded */
!nx_contains(nx, (char)value, (char)value2)
) {
value=outValues[0];
value2=outValues[1];
/* replace the starter with the composition, remove the
* combining mark
*/
remove= ncArg.c2==0 ? args.start-1 : args.start-2; /* index to the combining mark */
/* replace the starter with the composition */
args.source[starter]=(char)value;
if(starterIsSupplementary) {
if(value2!=0) {
/* both are supplementary */
args.source[starter+1]=(char)value2;
} else {
/* the composition is shorter than the starter,
* move the intermediate characters forward one */
starterIsSupplementary=false;
q=starter+1;
r=q+1;
while(r<remove) {
args.source[q++]=args.source[r++];
}
--remove;
}
} else if(value2!=0) { // for U+1109A, U+1109C, and U+110AB
starterIsSupplementary=true;
args.source[starter+1]=(char)value2;
/* } else { both are on the BMP, nothing more to do */
}
/* remove the combining mark by moving the following text
* over it */
if(remove<args.start) {
q=remove;
r=args.start;
while(r<args.limit) {
args.source[q++]=args.source[r++];
}
args.start=remove;
args.limit=q;
}
/* keep prevCC because we removed the combining mark */
/* done? */
if(args.start==args.limit) {
return (char)prevCC;
}
/* is the composition a starter that combines forward? */
if(result>1) {
combineFwdIndex=getCombiningIndexFromStarter((char)value,
(char)value2);
} else {
starter=-1;
}
/* we combined; continue with looking for compositions */
continue;
}
}
/* no combination this time */
prevCC=ncArg.cc;
if(args.start==args.limit) {
return (char)prevCC;
}
/* if (c, c2) did not combine, then check if it is a starter */
if(ncArg.cc==0) {
/* found a new starter; combineFlags==0 if (c, c2) is excluded */
if((combineFlags&COMBINES_FWD)!=0) {
/* it may combine with something, prepare for it */
if(ncArg.c2==0) {
starterIsSupplementary=false;
starter=args.start-1;
} else {
starterIsSupplementary=false;
starter=args.start-2;
}
combineFwdIndex=combineBackIndex;
} else {
/* it will not combine with anything */
starter=-1;
}
} else if((options&OPTIONS_COMPOSE_CONTIGUOUS)!=0) {
/* FCC: no discontiguous compositions; any intervening character blocks */
starter=-1;
}
}
}
// find the last true starter between src[start]....src[current] going
// backwards and return its index
private static int findPreviousStarter(char[]src, int srcStart, int current,
int/*unsigned*/ ccOrQCMask,
int/*unsigned*/ decompQCMask,
char minNoMaybe) {
long norm32;
PrevArgs args = new PrevArgs();
args.src = src;
args.start = srcStart;
args.current = current;
while(args.start<args.current) {
norm32= getPrevNorm32(args, minNoMaybe, ccOrQCMask|decompQCMask);
if(isTrueStarter(norm32, ccOrQCMask, decompQCMask)) {
break;
}
}
return args.current;
}
/* find the first true starter in [src..limit[ and return the
* pointer to it
*/
private static int/*index*/ findNextStarter(char[] src,int start,int limit,
int/*unsigned*/ qcMask,
int/*unsigned*/ decompQCMask,
char minNoMaybe) {
int p;
long/*unsigned*/ norm32;
int ccOrQCMask;
char c, c2;
ccOrQCMask=CC_MASK|qcMask;
DecomposeArgs decompArgs = new DecomposeArgs();
for(;;) {
if(start==limit) {
break; /* end of string */
}
c=src[start];
if(c<minNoMaybe) {
break; /* catches NUL terminater, too */
}
norm32=getNorm32(c);
if((norm32&ccOrQCMask)==0) {
break; /* true starter */
}
if(isNorm32LeadSurrogate(norm32)) {
/* c is a lead surrogate, get the real norm32 */
if((start+1)==limit ||
!UTF16.isTrailSurrogate(c2=(src[start+1]))){
/* unmatched first surrogate: counts as a true starter */
break;
}
norm32=getNorm32FromSurrogatePair(norm32, c2);
if((norm32&ccOrQCMask)==0) {
break; /* true starter */
}
} else {
c2=0;
}
/* (c, c2) is not a true starter but its decomposition may be */
if((norm32&decompQCMask)!=0) {
/* (c, c2) decomposes, get everything from the variable-length
* extra data */
p=decompose(norm32, decompQCMask, decompArgs);
/* get the first character's norm32 to check if it is a true
* starter */
if(decompArgs.cc==0 && (getNorm32(extraData,p, qcMask)&qcMask)==0) {
break; /* true starter */
}
}
start+= c2==0 ? 1 : 2; /* not a true starter, continue */
}
return start;
}
private static final class ComposePartArgs{
int prevCC;
int length; /* length of decomposed part */
}
/* decompose and recompose [prevStarter..src[ */
private static char[] composePart(ComposePartArgs args,
int prevStarter,
char[] src, int start, int limit,
int options,
UnicodeSet nx) {
int recomposeLimit;
boolean compat =((options&OPTIONS_COMPAT)!=0);
/* decompose [prevStarter..src[ */
int[] outTrailCC = new int[1];
char[] buffer = new char[(limit-prevStarter)*MAX_BUFFER_SIZE];
for(;;){
args.length=decompose(src,prevStarter,(start),
buffer,0,buffer.length,
compat,outTrailCC,nx);
if(args.length<=buffer.length){
break;
}else{
buffer = new char[args.length];
}
}
/* recompose the decomposition */
recomposeLimit=args.length;
if(args.length>=2) {
RecomposeArgs rcArgs = new RecomposeArgs();
rcArgs.source = buffer;
rcArgs.start = 0;
rcArgs.limit = recomposeLimit;
args.prevCC=recompose(rcArgs, options, nx);
recomposeLimit = rcArgs.limit;
}
/* return with a pointer to the recomposition and its length */
args.length=recomposeLimit;
return buffer;
}
private static boolean composeHangul(char prev, char c,
long/*unsigned*/ norm32,
char[] src,int[] srcIndex, int limit,
boolean compat,
char[] dest,int destIndex,
UnicodeSet nx) {
int start=srcIndex[0];
if(isJamoVTNorm32JamoV(norm32)) {
/* c is a Jamo V, compose with previous Jamo L and
* following Jamo T */
prev=(char)(prev-JAMO_L_BASE);
if(prev<JAMO_L_COUNT) {
c=(char)(HANGUL_BASE+(prev*JAMO_V_COUNT+
(c-JAMO_V_BASE))*JAMO_T_COUNT);
/* check if the next character is a Jamo T (normal or
* compatibility) */
if(start!=limit) {
char next, t;
next=src[start];
if((t=(char)(next-JAMO_T_BASE))<JAMO_T_COUNT) {
/* normal Jamo T */
++start;
c+=t;
} else if(compat) {
/* if NFKC, then check for compatibility Jamo T
* (BMP only) */
norm32=getNorm32(next);
if(isNorm32Regular(norm32) && ((norm32&QC_NFKD)!=0)) {
int p /*index into extra data array*/;
DecomposeArgs dcArgs = new DecomposeArgs();
p=decompose(norm32, QC_NFKD, dcArgs);
if(dcArgs.length==1 &&
(t=(char)(extraData[p]-JAMO_T_BASE))
<JAMO_T_COUNT) {
/* compatibility Jamo T */
++start;
c+=t;
}
}
}
}
if(nx_contains(nx, c)) {
if(!isHangulWithoutJamoT(c)) {
--start; /* undo ++start from reading the Jamo T */
}
return false;
}
dest[destIndex]=c;
srcIndex[0]=start;
return true;
}
} else if(isHangulWithoutJamoT(prev)) {
/* c is a Jamo T, compose with previous Hangul LV that does not
* contain a Jamo T */
c=(char)(prev+(c-JAMO_T_BASE));
if(nx_contains(nx, c)) {
return false;
}
dest[destIndex]=c;
srcIndex[0]=start;
return true;
}
return false;
}
/*
public static int compose(char[] src, char[] dest,boolean compat, UnicodeSet nx){
return compose(src,0,src.length,dest,0,dest.length,compat, nx);
}
*/
public static int compose(char[] src, int srcStart, int srcLimit,
char[] dest,int destStart,int destLimit,
int options,UnicodeSet nx) {
int prevSrc, prevStarter;
long/*unsigned*/ norm32;
int ccOrQCMask, qcMask;
int reorderStartIndex, length;
char c, c2, minNoMaybe;
int/*unsigned byte*/ cc, prevCC;
int[] ioIndex = new int[1];
int destIndex = destStart;
int srcIndex = srcStart;
if((options&OPTIONS_COMPAT)!=0) {
minNoMaybe=(char)indexes[INDEX_MIN_NFKC_NO_MAYBE];
qcMask=QC_NFKC;
} else {
minNoMaybe=(char)indexes[INDEX_MIN_NFC_NO_MAYBE];
qcMask=QC_NFC;
}
/*
* prevStarter points to the last character before the current one
* that is a "true" starter with cc==0 and quick check "yes".
*
* prevStarter will be used instead of looking for a true starter
* while incrementally decomposing [prevStarter..prevSrc[
* in _composePart(). Having a good prevStarter allows to just decompose
* the entire [prevStarter..prevSrc[.
*
* When _composePart() backs out from prevSrc back to prevStarter,
* then it also backs out destIndex by the same amount.
* Therefore, at all times, the (prevSrc-prevStarter) source units
* must correspond 1:1 to destination units counted with destIndex,
* except for reordering.
* This is true for the qc "yes" characters copied in the fast loop,
* and for pure reordering.
* prevStarter must be set forward to src when this is not true:
* In _composePart() and after composing a Hangul syllable.
*
* This mechanism relies on the assumption that the decomposition of a
* true starter also begins with a true starter. gennorm/store.c checks
* for this.
*/
prevStarter=srcIndex;
ccOrQCMask=CC_MASK|qcMask;
/*destIndex=*/reorderStartIndex=0;/* ####TODO#### check this **/
prevCC=0;
/* avoid compiler warnings */
norm32=0;
c=0;
for(;;) {
/* count code units below the minimum or with irrelevant data for
* the quick check */
prevSrc=srcIndex;
while(srcIndex!=srcLimit && ((c=src[srcIndex])<minNoMaybe ||
((norm32=getNorm32(c))&ccOrQCMask)==0)) {
prevCC=0;
++srcIndex;
}
/* copy these code units all at once */
if(srcIndex!=prevSrc) {
length=srcIndex-prevSrc;
if((destIndex+length)<=destLimit) {
System.arraycopy(src,prevSrc,dest,destIndex,length);
}
destIndex+=length;
reorderStartIndex=destIndex;
/* set prevStarter to the last character in the quick check
* loop */
prevStarter=srcIndex-1;
if(UTF16.isTrailSurrogate(src[prevStarter]) &&
prevSrc<prevStarter &&
UTF16.isLeadSurrogate(src[(prevStarter-1)])) {
--prevStarter;
}
prevSrc=srcIndex;
}
/* end of source reached? */
if(srcIndex==srcLimit) {
break;
}
/* c already contains *src and norm32 is set for it, increment src*/
++srcIndex;
/*
* source buffer pointers:
*
* all done quick check current char not yet
* "yes" but (c, c2) processed
* may combine
* forward
* [-------------[-------------[-------------[-------------[
* | | | | |
* start prevStarter prevSrc src limit
*
*
* destination buffer pointers and indexes:
*
* all done might take not filled yet
* characters for
* reordering
* [-------------[-------------[-------------[
* | | | |
* dest reorderStartIndex destIndex destCapacity
*/
/* check one above-minimum, relevant code unit */
/*
* norm32 is for c=*(src-1), and the quick check flag is "no" or
* "maybe", and/or cc!=0
* check for Jamo V/T, then for surrogates and regular characters
* c is not a Hangul syllable or Jamo L because
* they are not marked with no/maybe for NFC & NFKC(and their cc==0)
*/
if(isNorm32HangulOrJamo(norm32)) {
/*
* c is a Jamo V/T:
* try to compose with the previous character, Jamo V also with
* a following Jamo T, and set values here right now in case we
* just continue with the main loop
*/
prevCC=cc=0;
reorderStartIndex=destIndex;
ioIndex[0]=srcIndex;
if(
destIndex>0 &&
composeHangul(src[(prevSrc-1)], c, norm32,src, ioIndex,
srcLimit, (options&OPTIONS_COMPAT)!=0, dest,
destIndex<=destLimit ? destIndex-1: 0,
nx)
) {
srcIndex=ioIndex[0];
prevStarter=srcIndex;
continue;
}
srcIndex = ioIndex[0];
/* the Jamo V/T did not compose into a Hangul syllable, just
* append to dest */
c2=0;
length=1;
prevStarter=prevSrc;
} else {
if(isNorm32Regular(norm32)) {
c2=0;
length=1;
} else {
/* c is a lead surrogate, get the real norm32 */
if(srcIndex!=srcLimit &&
UTF16.isTrailSurrogate(c2=src[srcIndex])) {
++srcIndex;
length=2;
norm32=getNorm32FromSurrogatePair(norm32, c2);
} else {
/* c is an unpaired lead surrogate, nothing to do */
c2=0;
length=1;
norm32=0;
}
}
ComposePartArgs args =new ComposePartArgs();
/* we are looking at the character (c, c2) at [prevSrc..src[ */
if(nx_contains(nx, c, c2)) {
/* excluded: norm32==0 */
cc=0;
} else if((norm32&qcMask)==0) {
cc=(int)((UNSIGNED_BYTE_MASK)&(norm32>>CC_SHIFT));
} else {
char[] p;
/*
* find appropriate boundaries around this character,
* decompose the source text from between the boundaries,
* and recompose it
*
* this puts the intermediate text into the side buffer because
* it might be longer than the recomposition end result,
* or the destination buffer may be too short or missing
*
* note that destIndex may be adjusted backwards to account
* for source text that passed the quick check but needed to
* take part in the recomposition
*/
int decompQCMask=(qcMask<<2)&0xf; /* decomposition quick check mask */
/*
* find the last true starter in [prevStarter..src[
* it is either the decomposition of the current character (at prevSrc),
* or prevStarter
*/
if(isTrueStarter(norm32, CC_MASK|qcMask, decompQCMask)) {
prevStarter=prevSrc;
} else {
/* adjust destIndex: back out what had been copied with qc "yes" */
destIndex-=prevSrc-prevStarter;
}
/* find the next true starter in [src..limit[ */
srcIndex=findNextStarter(src, srcIndex,srcLimit, qcMask,
decompQCMask, minNoMaybe);
//args.prevStarter = prevStarter;
args.prevCC = prevCC;
//args.destIndex = destIndex;
args.length = length;
p=composePart(args,prevStarter,src,srcIndex,srcLimit,options,nx);
if(p==null) {
/* an error occurred (out of memory) */
break;
}
prevCC = args.prevCC;
length = args.length;
/* append the recomposed buffer contents to the destination
* buffer */
if((destIndex+args.length)<=destLimit) {
int i=0;
while(i<args.length) {
dest[destIndex++]=p[i++];
--length;
}
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
destIndex+=length;
}
prevStarter=srcIndex;
continue;
}
}
/* append the single code point (c, c2) to the destination buffer */
if((destIndex+length)<=destLimit) {
if(cc!=0 && cc<prevCC) {
/* (c, c2) is out of order with respect to the preceding
* text */
int reorderSplit= destIndex;
destIndex+=length;
prevCC=insertOrdered(dest,reorderStartIndex, reorderSplit,
destIndex, c, c2, cc);
} else {
/* just append (c, c2) */
dest[destIndex++]=c;
if(c2!=0) {
dest[destIndex++]=c2;
}
prevCC=cc;
}
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
destIndex+=length;
prevCC=cc;
}
}
return destIndex - destStart;
}
public static int getCombiningClass(int c) {
long norm32;
norm32=getNorm32(c);
return (int)((norm32>>CC_SHIFT)&0xFF);
}
public static boolean isFullCompositionExclusion(int c) {
if(isFormatVersion_2_1) {
int aux =AuxTrieImpl.auxTrie.getCodePointValue(c);
return (aux & AUX_COMP_EX_MASK)!=0;
} else {
return false;
}
}
public static boolean isCanonSafeStart(int c) {
if(isFormatVersion_2_1) {
int aux = AuxTrieImpl.auxTrie.getCodePointValue(c);
return (aux & AUX_UNSAFE_MASK)==0;
} else {
return false;
}
}
/* Is c an NF<mode>-skippable code point? See unormimp.h. */
public static boolean isNFSkippable(int c, NormalizerBase.Mode mode, long mask) {
long /*unsigned int*/ norm32;
mask = mask & UNSIGNED_INT_MASK;
char aux;
/* check conditions (a)..(e), see unormimp.h */
norm32 = getNorm32(c);
if((norm32&mask)!=0) {
return false; /* fails (a)..(e), not skippable */
}
if(mode == NormalizerBase.NFD || mode == NormalizerBase.NFKD || mode == NormalizerBase.NONE){
return true; /* NF*D, passed (a)..(c), is skippable */
}
/* check conditions (a)..(e), see unormimp.h */
/* NF*C/FCC, passed (a)..(e) */
if((norm32& QC_NFD)==0) {
return true; /* no canonical decomposition, is skippable */
}
/* check Hangul syllables algorithmically */
if(isNorm32HangulOrJamo(norm32)) {
/* Jamo passed (a)..(e) above, must be Hangul */
return !isHangulWithoutJamoT((char)c); /* LVT are skippable, LV are not */
}
/* if(mode<=UNORM_NFKC) { -- enable when implementing FCC */
/* NF*C, test (f) flag */
if(!isFormatVersion_2_2) {
return false; /* no (f) data, say not skippable to be safe */
}
aux = AuxTrieImpl.auxTrie.getCodePointValue(c);
return (aux&AUX_NFC_SKIP_F_MASK)==0; /* TRUE=skippable if the (f) flag is not set */
/* } else { FCC, test fcd<=1 instead of the above } */
}
public static UnicodeSet addPropertyStarts(UnicodeSet set) {
int c;
/* add the start code point of each same-value range of each trie */
//utrie_enum(&normTrie, NULL, _enumPropertyStartsRange, set);
TrieIterator normIter = new TrieIterator(NormTrieImpl.normTrie);
RangeValueIterator.Element normResult = new RangeValueIterator.Element();
while(normIter.next(normResult)){
set.add(normResult.start);
}
//utrie_enum(&fcdTrie, NULL, _enumPropertyStartsRange, set);
TrieIterator fcdIter = new TrieIterator(FCDTrieImpl.fcdTrie);
RangeValueIterator.Element fcdResult = new RangeValueIterator.Element();
while(fcdIter.next(fcdResult)){
set.add(fcdResult.start);
}
if(isFormatVersion_2_1){
//utrie_enum(&auxTrie, NULL, _enumPropertyStartsRange, set);
TrieIterator auxIter = new TrieIterator(AuxTrieImpl.auxTrie);
RangeValueIterator.Element auxResult = new RangeValueIterator.Element();
while(auxIter.next(auxResult)){
set.add(auxResult.start);
}
}
/* add Hangul LV syllables and LV+1 because of skippables */
for(c=HANGUL_BASE; c<HANGUL_BASE+HANGUL_COUNT; c+=JAMO_T_COUNT) {
set.add(c);
set.add(c+1);
}
set.add(HANGUL_BASE+HANGUL_COUNT); /* add Hangul+1 to continue with other properties */
return set; // for chaining
}
/**
* Internal API, used in UCharacter.getIntPropertyValue().
* @internal
* @param c code point
* @param modeValue numeric value compatible with Mode
* @return numeric value compatible with QuickCheck
*/
public static final int quickCheck(int c, int modeValue) {
final int qcMask[/*UNORM_MODE_COUNT*/]={
0, 0, QC_NFD, QC_NFKD, QC_NFC, QC_NFKC
};
int norm32=(int)getNorm32(c)&qcMask[modeValue];
if(norm32==0) {
return 1; // YES
} else if((norm32&QC_ANY_NO)!=0) {
return 0; // NO
} else /* _NORM_QC_ANY_MAYBE */ {
return 2; // MAYBE;
}
}
private static int strCompare(char[] s1, int s1Start, int s1Limit,
char[] s2, int s2Start, int s2Limit,
boolean codePointOrder) {
int start1, start2, limit1, limit2;
char c1, c2;
/* setup for fix-up */
start1=s1Start;
start2=s2Start;
int length1, length2;
length1 = s1Limit - s1Start;
length2 = s2Limit - s2Start;
int lengthResult;
if(length1<length2) {
lengthResult=-1;
limit1=start1+length1;
} else if(length1==length2) {
lengthResult=0;
limit1=start1+length1;
} else /* length1>length2 */ {
lengthResult=1;
limit1=start1+length2;
}
if(s1==s2) {
return lengthResult;
}
for(;;) {
/* check pseudo-limit */
if(s1Start==limit1) {
return lengthResult;
}
c1=s1[s1Start];
c2=s2[s2Start];
if(c1!=c2) {
break;
}
++s1Start;
++s2Start;
}
/* setup for fix-up */
limit1=start1+length1;
limit2=start2+length2;
/* if both values are in or above the surrogate range, fix them up */
if(c1>=0xd800 && c2>=0xd800 && codePointOrder) {
/* subtract 0x2800 from BMP code points to make them smaller than
* supplementary ones */
if(
( c1<=0xdbff && (s1Start+1)!=limit1 &&
UTF16.isTrailSurrogate(s1[(s1Start+1)])
) ||
( UTF16.isTrailSurrogate(c1) && start1!=s1Start &&
UTF16.isLeadSurrogate(s1[(s1Start-1)])
)
) {
/* part of a surrogate pair, leave >=d800 */
} else {
/* BMP code point - may be surrogate code point - make <d800 */
c1-=0x2800;
}
if(
( c2<=0xdbff && (s2Start+1)!=limit2 &&
UTF16.isTrailSurrogate(s2[(s2Start+1)])
) ||
( UTF16.isTrailSurrogate(c2) && start2!=s2Start &&
UTF16.isLeadSurrogate(s2[(s2Start-1)])
)
) {
/* part of a surrogate pair, leave >=d800 */
} else {
/* BMP code point - may be surrogate code point - make <d800 */
c2-=0x2800;
}
}
/* now c1 and c2 are in UTF-32-compatible order */
return (int)c1-(int)c2;
}
/*
* Status of tailored normalization
*
* This was done initially for investigation on Unicode public review issue 7
* (http://www.unicode.org/review/). See Jitterbug 2481.
* While the UTC at meeting #94 (2003mar) did not take up the issue, this is
* a permanent feature in ICU 2.6 in support of IDNA which requires true
* Unicode 3.2 normalization.
* (NormalizationCorrections are rolled into IDNA mapping tables.)
*
* Tailored normalization as implemented here allows to "normalize less"
* than full Unicode normalization would.
* Based internally on a UnicodeSet of code points that are
* "excluded from normalization", the normalization functions leave those
* code points alone ("inert"). This means that tailored normalization
* still transforms text into a canonically equivalent form.
* It does not add decompositions to code points that do not have any or
* change decomposition results.
*
* Any function that searches for a safe boundary has not been touched,
* which means that these functions will be over-pessimistic when
* exclusions are applied.
* This should not matter because subsequent checks and normalizations
* do apply the exclusions; only a little more of the text may be processed
* than necessary under exclusions.
*
* Normalization exclusions have the following effect on excluded code points c:
* - c is not decomposed
* - c is not a composition target
* - c does not combine forward or backward for composition
* except that this is not implemented for Jamo
* - c is treated as having a combining class of 0
*/
/*
* Constants for the bit fields in the options bit set parameter.
* These need not be public.
* A user only needs to know the currently assigned values.
* The number and positions of reserved bits per field can remain private.
*/
private static final int OPTIONS_NX_MASK=0x1f;
private static final int OPTIONS_UNICODE_MASK=0xe0;
public static final int OPTIONS_SETS_MASK=0xff;
// private static final int OPTIONS_UNICODE_SHIFT=5;
private static final UnicodeSet[] nxCache = new UnicodeSet[OPTIONS_SETS_MASK+1];
/* Constants for options flags for normalization.*/
/**
* Options bit 0, do not decompose Hangul syllables.
* @draft ICU 2.6
*/
private static final int NX_HANGUL = 1;
/**
* Options bit 1, do not decompose CJK compatibility characters.
* @draft ICU 2.6
*/
private static final int NX_CJK_COMPAT=2;
/**
* Options bit 8, use buggy recomposition described in
* Unicode Public Review Issue #29
* at http://www.unicode.org/review/resolved-pri.html#pri29
*
* Used in IDNA implementation according to strict interpretation
* of IDNA definition based on Unicode 3.2 which predates PRI #29.
*
* See ICU4C unormimp.h
*
* @draft ICU 3.2
*/
public static final int BEFORE_PRI_29=0x100;
/*
* The following options are used only in some composition functions.
* They use bits 12 and up to preserve lower bits for the available options
* space in unorm_compare() -
* see documentation for UNORM_COMPARE_NORM_OPTIONS_SHIFT.
*/
/** Options bit 12, for compatibility vs. canonical decomposition. */
public static final int OPTIONS_COMPAT=0x1000;
/** Options bit 13, no discontiguous composition (FCC vs. NFC). */
public static final int OPTIONS_COMPOSE_CONTIGUOUS=0x2000;
/* normalization exclusion sets --------------------------------------------- */
/*
* Normalization exclusion UnicodeSets are used for tailored normalization;
* see the comment near the beginning of this file.
*
* By specifying one or several sets of code points,
* those code points become inert for normalization.
*/
private static final synchronized UnicodeSet internalGetNXHangul() {
/* internal function, does not check for incoming U_FAILURE */
if(nxCache[NX_HANGUL]==null) {
nxCache[NX_HANGUL]=new UnicodeSet(0xac00, 0xd7a3);
}
return nxCache[NX_HANGUL];
}
private static final synchronized UnicodeSet internalGetNXCJKCompat() {
/* internal function, does not check for incoming U_FAILURE */
if(nxCache[NX_CJK_COMPAT]==null) {
/* build a set from [CJK Ideographs]&[has canonical decomposition] */
UnicodeSet set, hasDecomp;
set=new UnicodeSet("[:Ideographic:]");
/* start with an empty set for [has canonical decomposition] */
hasDecomp=new UnicodeSet();
/* iterate over all ideographs and remember which canonically decompose */
UnicodeSetIterator it = new UnicodeSetIterator(set);
int start, end;
long norm32;
while(it.nextRange() && (it.codepoint != UnicodeSetIterator.IS_STRING)) {
start=it.codepoint;
end=it.codepointEnd;
while(start<=end) {
norm32 = getNorm32(start);
if((norm32 & QC_NFD)>0) {
hasDecomp.add(start);
}
++start;
}
}
/* hasDecomp now contains all ideographs that decompose canonically */
nxCache[NX_CJK_COMPAT]=hasDecomp;
}
return nxCache[NX_CJK_COMPAT];
}
private static final synchronized UnicodeSet internalGetNXUnicode(int options) {
options &= OPTIONS_UNICODE_MASK;
if(options==0) {
return null;
}
if(nxCache[options]==null) {
/* build a set with all code points that were not designated by the specified Unicode version */
UnicodeSet set = new UnicodeSet();
switch(options) {
case NormalizerBase.UNICODE_3_2:
set.applyPattern("[:^Age=3.2:]");
break;
default:
return null;
}
nxCache[options]=set;
}
return nxCache[options];
}
/* Get a decomposition exclusion set. The data must be loaded. */
private static final synchronized UnicodeSet internalGetNX(int options) {
options&=OPTIONS_SETS_MASK;
if(nxCache[options]==null) {
/* return basic sets */
if(options==NX_HANGUL) {
return internalGetNXHangul();
}
if(options==NX_CJK_COMPAT) {
return internalGetNXCJKCompat();
}
if((options & OPTIONS_UNICODE_MASK)!=0 && (options & OPTIONS_NX_MASK)==0) {
return internalGetNXUnicode(options);
}
/* build a set from multiple subsets */
UnicodeSet set;
UnicodeSet other;
set=new UnicodeSet();
if((options & NX_HANGUL)!=0 && null!=(other=internalGetNXHangul())) {
set.addAll(other);
}
if((options&NX_CJK_COMPAT)!=0 && null!=(other=internalGetNXCJKCompat())) {
set.addAll(other);
}
if((options&OPTIONS_UNICODE_MASK)!=0 && null!=(other=internalGetNXUnicode(options))) {
set.addAll(other);
}
nxCache[options]=set;
}
return nxCache[options];
}
public static final UnicodeSet getNX(int options) {
if((options&=OPTIONS_SETS_MASK)==0) {
/* incoming failure, or no decomposition exclusions requested */
return null;
} else {
return internalGetNX(options);
}
}
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