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com.groupbyinc.common.jregex.CharacterClass Maven / Gradle / Ivy
/**
* Copyright (c) 2001, Sergey A. Samokhodkin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form
* must reproduce the above copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of jregex nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @version 1.2_01
*/
package jregex;
import java.util.*;
class CharacterClass extends Term implements UnicodeConstants{
static final Bitset DIGIT=new Bitset();
static final Bitset WORDCHAR=new Bitset();
static final Bitset SPACE=new Bitset();
static final Bitset UDIGIT=new Bitset();
static final Bitset UWORDCHAR=new Bitset();
static final Bitset USPACE=new Bitset();
static final Bitset NONDIGIT=new Bitset();
static final Bitset NONWORDCHAR=new Bitset();
static final Bitset NONSPACE=new Bitset();
static final Bitset UNONDIGIT=new Bitset();
static final Bitset UNONWORDCHAR=new Bitset();
static final Bitset UNONSPACE=new Bitset();
private static boolean namesInitialized=false;
static final Hashtable namedClasses=new Hashtable();
static final Vector unicodeBlocks=new Vector();
static final Vector posixClasses=new Vector();
static final Vector unicodeCategories=new Vector();
//modes; used in parseGroup(()
private final static int ADD=1;
private final static int SUBTRACT=2;
private final static int INTERSECT=3;
private static final String blockData=
"0000..007F:InBasicLatin;0080..00FF:InLatin-1Supplement;0100..017F:InLatinExtended-A;"
+"0180..024F:InLatinExtended-B;0250..02AF:InIPAExtensions;02B0..02FF:InSpacingModifierLetters;"
+"0300..036F:InCombiningDiacriticalMarks;0370..03FF:InGreek;0400..04FF:InCyrillic;0530..058F:InArmenian;"
+"0590..05FF:InHebrew;0600..06FF:InArabic;0700..074F:InSyriac;0780..07BF:InThaana;0900..097F:InDevanagari;"
+"0980..09FF:InBengali;0A00..0A7F:InGurmukhi;0A80..0AFF:InGujarati;0B00..0B7F:InOriya;0B80..0BFF:InTamil;"
+"0C00..0C7F:InTelugu;0C80..0CFF:InKannada;0D00..0D7F:InMalayalam;0D80..0DFF:InSinhala;0E00..0E7F:InThai;"
+"0E80..0EFF:InLao;0F00..0FFF:InTibetan;1000..109F:InMyanmar;10A0..10FF:InGeorgian;1100..11FF:InHangulJamo;"
+"1200..137F:InEthiopic;13A0..13FF:InCherokee;1400..167F:InUnifiedCanadianAboriginalSyllabics;"
+"1680..169F:InOgham;16A0..16FF:InRunic;1780..17FF:InKhmer;1800..18AF:InMongolian;"
+"1E00..1EFF:InLatinExtendedAdditional;1F00..1FFF:InGreekExtended;2000..206F:InGeneralPunctuation;"
+"2070..209F:InSuperscriptsAndSubscripts;20A0..20CF:InCurrencySymbols;"
+"20D0..20FF:InCombiningMarksForSymbols;2100..214F:InLetterLikeSymbols;2150..218F:InNumberForms;"
+"2190..21FF:InArrows;2200..22FF:InMathematicalOperators;2300..23FF:InMiscellaneousTechnical;"
+"2400..243F:InControlPictures;2440..245F:InOpticalCharacterRecognition;"
+"2460..24FF:InEnclosedAlphanumerics;2500..257F:InBoxDrawing;2580..259F:InBlockElements;"
+"25A0..25FF:InGeometricShapes;2600..26FF:InMiscellaneousSymbols;2700..27BF:InDingbats;"
+"2800..28FF:InBraillePatterns;2E80..2EFF:InCJKRadicalsSupplement;2F00..2FDF:InKangxiRadicals;"
+"2FF0..2FFF:InIdeographicDescriptionCharacters;3000..303F:InCJKSymbolsAndPunctuation;"
+"3040..309F:InHiragana;30A0..30FF:InKatakana;3100..312F:InBopomofo;3130..318F:InHangulCompatibilityJamo;"
+"3190..319F:InKanbun;31A0..31BF:InBopomofoExtended;3200..32FF:InEnclosedCJKLettersAndMonths;"
+"3300..33FF:InCJKCompatibility;3400..4DB5:InCJKUnifiedIdeographsExtensionA;"
+"4E00..9FFF:InCJKUnifiedIdeographs;A000..A48F:InYiSyllables;A490..A4CF:InYiRadicals;"
+"AC00..D7A3:InHangulSyllables;D800..DB7F:InHighSurrogates;DB80..DBFF:InHighPrivateUseSurrogates;"
+"DC00..DFFF:InLowSurrogates;E000..F8FF:InPrivateUse;F900..FAFF:InCJKCompatibilityIdeographs;"
+"FB00..FB4F:InAlphabeticPresentationForms;FB50..FDFF:InArabicPresentationForms-A;"
+"FE20..FE2F:InCombiningHalfMarks;FE30..FE4F:InCJKCompatibilityForms;FE50..FE6F:InSmallFormVariants;"
+"FE70..FEFE:InArabicPresentationForms-B;FEFF..FEFF:InSpecials;FF00..FFEF:InHalfWidthAndFullWidthForms;"
+"FFF0..FFFD:InSpecials";
static{
//*
DIGIT.setDigit(false);
WORDCHAR.setWordChar(false);
SPACE.setSpace(false);
UDIGIT.setDigit(true);
UWORDCHAR.setWordChar(true);
USPACE.setSpace(true);
NONDIGIT.setDigit(false); NONDIGIT.setPositive(false);
NONWORDCHAR.setWordChar(false); NONWORDCHAR.setPositive(false);
NONSPACE.setSpace(false); NONSPACE.setPositive(false);
UNONDIGIT.setDigit(true); UNONDIGIT.setPositive(false);
UNONWORDCHAR.setWordChar(true); UNONWORDCHAR.setPositive(false);
UNONSPACE.setSpace(true); UNONSPACE.setPositive(false);
initPosixClasses();
}
private static void registerClass(String name,Bitset cls,Vector realm){
namedClasses.put(name,cls);
if(!realm.contains(name))realm.addElement(name);
}
private static void initPosixClasses(){
Bitset lower=new Bitset();
lower.setRange('a','z');
registerClass("Lower",lower,posixClasses);
Bitset upper=new Bitset();
upper.setRange('A','Z');
registerClass("Upper",upper,posixClasses);
Bitset ascii=new Bitset();
ascii.setRange((char)0,(char)0x7f);
registerClass("ASCII",ascii,posixClasses);
Bitset alpha=new Bitset();
alpha.add(lower);
alpha.add(upper);
registerClass("Alpha",alpha,posixClasses);
Bitset digit=new Bitset();
digit.setRange('0','9');
registerClass("Digit",digit,posixClasses);
Bitset alnum=new Bitset();
alnum.add(alpha);
alnum.add(digit);
registerClass("Alnum",alnum,posixClasses);
Bitset punct=new Bitset();
punct.setChars("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~");
registerClass("Punct",punct,posixClasses);
Bitset graph=new Bitset();
graph.add(alnum);
graph.add(punct);
registerClass("Graph",graph,posixClasses);
registerClass("Print",graph,posixClasses);
Bitset blank=new Bitset();
blank.setChars(" \t");
registerClass("Blank",blank,posixClasses);
Bitset cntrl=new Bitset();
cntrl.setRange((char)0,(char)0x1f);
cntrl.setChar((char)0x7f);
registerClass("Cntrl",cntrl,posixClasses);
Bitset xdigit=new Bitset();
xdigit.setRange('0','9');
xdigit.setRange('a','f');
xdigit.setRange('A','F');
registerClass("XDigit",xdigit,posixClasses);
Bitset space=new Bitset();
space.setChars(" \t\n\r\f\u000b");
registerClass("Space",space,posixClasses);
}
private static void initNames(){
initNamedCategory("C",new int[]{Cn,Cc,Cf,Co,Cs});
initNamedCategory("Cn",Cn);
initNamedCategory("Cc",Cc);
initNamedCategory("Cf",Cf);
initNamedCategory("Co",Co);
initNamedCategory("Cs",Cs);
initNamedCategory("L",new int[]{Lu,Ll,Lt,Lm,Lo});
initNamedCategory("Lu",Lu);
initNamedCategory("Ll",Ll);
initNamedCategory("Lt",Lt);
initNamedCategory("Lm",Lm);
initNamedCategory("Lo",Lo);
initNamedCategory("M",new int[]{Mn,Me,Mc});
initNamedCategory("Mn",Mn);
initNamedCategory("Me",Me);
initNamedCategory("Mc",Mc);
initNamedCategory("N",new int[]{Nd,Nl,No});
initNamedCategory("Nd",Nd);
initNamedCategory("Nl",Nl);
initNamedCategory("No",No);
initNamedCategory("Z",new int[]{Zs,Zl,Zp});
initNamedCategory("Zs",Zs);
initNamedCategory("Zl",Zl);
initNamedCategory("Zp",Zp);
initNamedCategory("P",new int[]{Pd,Ps,Pi,Pe,Pf,Pc,Po});
initNamedCategory("Pd",Pd);
initNamedCategory("Ps",Ps);
initNamedCategory("Pi",Pi);
initNamedCategory("Pe",Pe);
initNamedCategory("Pf",Pf);
initNamedCategory("Pc",Pc);
initNamedCategory("Po",Po);
initNamedCategory("S",new int[]{Sm,Sc,Sk,So});
initNamedCategory("Sm",Sm);
initNamedCategory("Sc",Sc);
initNamedCategory("Sk",Sk);
initNamedCategory("So",So);
Bitset bs=new Bitset();
bs.setCategory(Cn);
registerClass("UNASSIGNED",bs,unicodeCategories);
bs=new Bitset();
bs.setCategory(Cn);
bs.setPositive(false);
registerClass("ASSIGNED",bs,unicodeCategories);
StringTokenizer st=new StringTokenizer(blockData,".,:;");
while(st.hasMoreTokens()){
try{
int first=Integer.parseInt(st.nextToken(),16);
int last=Integer.parseInt(st.nextToken(),16);
String name=st.nextToken();
initNamedBlock(name,first,last);
}
catch(Exception e){
e.printStackTrace();
}
}
initNamedBlock("ALL",0,0xffff);
namesInitialized=true;
//*/
}
private static void initNamedBlock(String name,int first,int last){
if(firstCharacter.MAX_VALUE) throw new IllegalArgumentException("wrong start code ("+first+") in block "+name);
if(lastCharacter.MAX_VALUE) throw new IllegalArgumentException("wrong end code ("+last+") in block "+name);
if(last=0){
char c1=(char)prev;
if(icase){
bs.setChar(Character.toLowerCase(c1));
bs.setChar(Character.toUpperCase(c1));
bs.setChar(Character.toTitleCase(c1));
}
else bs.setChar(c1);
}
return i;
case '-':
if(isFirst) break;
//if(isFirst) throw new PatternSyntaxException("[-...] is illegal");
if(inRange) break;
//if(inRange) throw new PatternSyntaxException("[...--...] is illegal");
inRange=true;
continue;
case '[':
if(inRange && xml){ //[..-[..]]
if(prev>=0) bs.setChar((char)prev);
if(bs1==null) bs1=new Bitset();
else bs1.reset();
i=parseClass(data,i,out,bs1,icase,skipspaces,unicode,xml);
//System.out.println(" i="+i);
bs.subtract(bs1);
inRange=false;
prev=-1;
continue;
}
else break handle_special;
case '^':
//if(!isFirst) throw new PatternSyntaxException("'^' isn't a first char in a class def");
//bs.setPositive(false);
//setFirst=true;
//continue;
if(isFirst){
bs.setPositive(false);
setFirst=true;
continue;
}
//treat as normal char
break;
case ' ':
case '\r':
case '\n':
case '\t':
case '\f':
if(skipspaces) continue;
else break handle_special;
case '\\':
Bitset negatigeClass=null;
boolean inv=false;
handle_escape: switch(c=data[i++]){
case 'r':
c='\r';
break handle_special;
case 'n':
c='\n';
break handle_special;
case 't':
c='\t';
break handle_special;
case 'f':
c='\f';
break handle_special;
case 'u':
if(i>=out-4) throw new PatternSyntaxException("incomplete escape sequence \\uXXXX");
c=(char)((toHexDigit(c)<<12)
+(toHexDigit(data[i++])<<8)
+(toHexDigit(data[i++])<<4)
+toHexDigit(data[i++]));
break handle_special;
case 'v':
c=(char)((toHexDigit(c)<<24)+
(toHexDigit(data[i++])<<16)+
(toHexDigit(data[i++])<<12)+
(toHexDigit(data[i++])<<8)+
(toHexDigit(data[i++])<<4)+
toHexDigit(data[i++]));
break handle_special;
case 'b':
c=8; // backspace
break handle_special;
case 'x':{ // hex 2-digit number
int hex=0;
char d;
if((d=data[i++])=='{'){
while((d=data[i++])!='}'){
hex=(hex<<4)+toHexDigit(d);
}
if(hex>0xffff) throw new PatternSyntaxException("\\x{}");
}
else{
hex=(toHexDigit(d)<<4)+toHexDigit(data[i++]);
}
c=(char)hex;
break handle_special;
}
case 'o': // oct 2- or 3-digit number
int oct=0;
for(;;){
char d=data[i++];
if(d>='0' && d<='7'){
oct*=8;
oct+=d-'0';
if(oct>0xffff) break;
}
else break;
}
c=(char)oct;
break handle_special;
case 'm': // decimal number -> char
int dec=0;
for(;;){
char d=data[i++];
if(d>='0' && d<='9'){
dec*=10;
dec+=d-'0';
if(dec>0xffff) break;
}
else break;
}
c=(char)dec;
break handle_special;
case 'c': // ctrl-char
c=(char)(data[i++]&0x1f);
break handle_special;
//classes;
//
case 'D': // non-digit
negatigeClass=unicode? UNONDIGIT: NONDIGIT;
break handle_escape;
case 'S': // space
negatigeClass=unicode? UNONSPACE: NONSPACE;
break handle_escape;
case 'W': // space
negatigeClass=unicode? UNONWORDCHAR: NONWORDCHAR;
break handle_escape;
case 'd': // digit
if(inRange) throw new PatternSyntaxException("illegal range: [..."+prev+"-\\d...]");
bs.setDigit(unicode);
continue;
case 's': // digit
if(inRange) throw new PatternSyntaxException("illegal range: [..."+prev+"-\\s...]");
bs.setSpace(unicode);
continue;
case 'w': // digit
if(inRange) throw new PatternSyntaxException("illegal range: [..."+prev+"-\\w...]");
bs.setWordChar(unicode);
continue;
case 'P': // \\P{..}
inv=true;
case 'p': // \\p{..}
if(inRange) throw new PatternSyntaxException("illegal range: [..."+prev+"-\\w...]");
if(sb==null) sb=new StringBuffer();
else sb.setLength(0);
i=parseName(data,i,out,sb,skipspaces);
Bitset nc=getNamedClass(sb.toString());
if(nc==null) throw new PatternSyntaxException("unknown named class: {"+sb+"}");
bs.add(nc,inv);
continue;
default:
//other escaped treat as normal
break handle_special;
}
//negatigeClass;
//\S,\D,\W
if(inRange) throw new PatternSyntaxException("illegal range: [..."+prev+"-\\"+c+"...]");
bs.add(negatigeClass);
continue;
case '{': //
if(inRange) throw new PatternSyntaxException("illegal range: [..."+prev+"-\\w...]");
if(sb==null) sb=new StringBuffer();
else sb.setLength(0);
i=parseName(data,i-1,out,sb,skipspaces);
Bitset nc=getNamedClass(sb.toString());
if(nc==null) throw new PatternSyntaxException("unknown named class: {"+sb+"}");
bs.add(nc,false);
continue;
default:
}
//c is a normal char
//System.out.println(" normal c="+c+", inRange="+inRange+", prev="+(char)prev);
if(prev<0){
prev=c;
inRange=false;
continue;
}
if(!inRange){
char c1=(char)prev;
if(icase){
bs.setChar(Character.toLowerCase(c1));
bs.setChar(Character.toUpperCase(c1));
bs.setChar(Character.toTitleCase(c1));
}
else bs.setChar(c1);
prev=c;
}
else{
if(prev>c) throw new PatternSyntaxException("illegal range: "+prev+">"+c);
char c0=(char)prev;
inRange=false;
prev=-1;
if(icase){
bs.setRange(Character.toLowerCase(c0),Character.toLowerCase(c));
bs.setRange(Character.toUpperCase(c0),Character.toUpperCase(c));
bs.setRange(Character.toTitleCase(c0),Character.toTitleCase(c));
}
else bs.setRange(c0,c);
}
}
throw new PatternSyntaxException("unbalanced brackets in a class def");
}
final static int parseName(char[] data,int i,int out,StringBuffer sb,
boolean skipspaces) throws PatternSyntaxException{
char c;
int start=-1;
while(i=0xff) break loop;
}
int first=c;
while(arr[c]){
//System.out.println(c+": "+arr[c]);
c++;
if(c>0xff) break;
}
int last=c-1;
if(last==first) b.append(stringValue(last));
else{
b.append(stringValue(first));
b.append('-');
b.append(stringValue(last));
}
if(c>0xff) break;
}
return b.toString();
}
/* Mmm.. what is it?
static String stringValueC(boolean[] categories){
StringBuffer sb=new StringBuffer();
for(int i=0;i>8];
if(marks!=null && marks[c&255]) break;
c++;
if(c>0xffff) break loop;
}
int first=c;
for(;c<=0xffff;){
boolean[] marks=arr[c>>8];
if(marks==null || !marks[c&255]) break;
c++;
}
int last=c-1;
if(last==first) b.append(stringValue(last));
else{
b.append(stringValue(first));
b.append('-');
b.append(stringValue(last));
}
if(c>0xffff) break;
}
return b.toString();
}
static String stringValue(int c){
StringBuffer b=new StringBuffer(5);
if(c<32){
switch(c){
case '\r':
b.append("\\r");
break;
case '\n':
b.append("\\n");
break;
case '\t':
b.append("\\t");
break;
case '\f':
b.append("\\f");
break;
default:
b.append('(');
b.append((int)c);
b.append(')');
}
}
else if(c<256){
b.append((char)c);
}
else{
b.append('\\');
b.append('x');
b.append(Integer.toHexString(c));
}
return b.toString();
}
static int toHexDigit(char d) throws PatternSyntaxException{
int val=0;
if(d>='0' && d<='9') val=d-'0';
else if(d>='a' && d<='f') val=10+d-'a';
else if(d>='A' && d<='F') val=10+d-'A';
else throw new PatternSyntaxException("hexadecimal digit expected: "+d);
return val;
}
public static void main(String[] args){
if(!namesInitialized)initNames();
if(args.length==0){
System.out.println("Class usage: \\p{Class},\\P{Class}");
printRealm(posixClasses,"Posix classes");
printRealm(unicodeCategories,"Unicode categories");
printRealm(unicodeBlocks,"Unicode blocks");
}
else{
for(int i=0;i>8)&0xff;
if(data[cat][b]==0){
data[cat][b]=1;
data[cat][BLOCK_SIZE+1]++;
}
}
for(int i=0;i
