Author: knoaman
Date: Thu Jul 30 21:35:19 2009
New Revision: 799450
URL: http://svn.apache.org/viewvc?rev=799450&view=rev
Log:
Allow back references with multiple digits
Modified:
xerces/java/trunk/src/org/apache/xerces/impl/xpath/regex/RegexParser.java
Modified:
xerces/java/trunk/src/org/apache/xerces/impl/xpath/regex/RegexParser.java
URL:
http://svn.apache.org/viewvc/xerces/java/trunk/src/org/apache/xerces/impl/xpath/regex/RegexParser.java?rev=799450&r1=799449&r2=799450&view=diff
==============================================================================
--- xerces/java/trunk/src/org/apache/xerces/impl/xpath/regex/RegexParser.java
(original)
+++ xerces/java/trunk/src/org/apache/xerces/impl/xpath/regex/RegexParser.java
Thu Jul 30 21:35:19 2009
@@ -76,6 +76,7 @@
static protected final int S_INBRACKETS = 1;
static protected final int S_INXBRACKETS = 2;
int context = S_NORMAL;
+ int parenOpened = 1;
int parennumber = 1;
boolean hasBackReferences;
Vector references = null;
@@ -115,6 +116,7 @@
this.offset = 0;
this.setContext(S_NORMAL);
this.parennumber = 1;
+ this.parenOpened = 1;
this.hasBackReferences = false;
this.regex = regex;
if (this.isSet(RegularExpression.EXTENDED_COMMENT))
@@ -438,9 +440,10 @@
}
Token processParen() throws ParseException {
this.next();
- int p = this.parennumber++;
+ int p = this.parenOpened++;
Token tok = Token.createParen(this.parseRegex(), p);
if (this.read() != T_RPAREN) throw ex("parser.factor.1",
this.offset-1);
+ this.parennumber++;
this.next(); // Skips ')'
return tok;
}
@@ -460,9 +463,31 @@
int ch = this.regex.charAt(this.offset);
if ('1' <= ch && ch <= '9') {
refno = ch-'0';
+ int finalRefno = refno;
+
+ if (this.parennumber <= refno)
+ throw ex("parser.parse.2", this.offset);
+
+ while (this.offset + 1 < this.regexlen) {
+ ch = this.regex.charAt(this.offset + 1);
+ if ('1' <= ch && ch <= '9') {
+ refno = (refno * 10) + (ch - '0');
+ if (refno < this.parennumber) {
+ finalRefno= refno;
+ ++this.offset;
+ }
+ else {
+ break;
+ }
+ }
+ else {
+ break;
+ }
+ }
+
this.hasBackReferences = true;
if (this.references == null) this.references = new Vector();
- this.references.addElement(new ReferencePosition(refno,
this.offset));
+ this.references.addElement(new ReferencePosition(finalRefno,
this.offset));
this.offset ++;
if (this.regex.charAt(this.offset) != ')') throw
ex("parser.factor.1", this.offset);
this.offset ++;
@@ -571,10 +596,33 @@
}
Token processBackreference() throws ParseException {
int refnum = this.chardata-'0';
- Token tok = Token.createBackReference(refnum);
+ int finalRefnum = refnum;
+
+ if (this.parennumber <= refnum)
+ throw ex("parser.parse.2", this.offset-2);
+
+ while (this.offset < this.regexlen) {
+ final int ch = this.regex.charAt(this.offset);
+ if ('1' <= ch && ch <= '9') {
+ refnum = (refnum * 10) + (ch - '0');
+ if (refnum < this.parennumber) {
+ ++this.offset;
+ finalRefnum = refnum;
+ this.chardata = ch;
+ }
+ else {
+ break;
+ }
+ }
+ else {
+ break;
+ }
+ }
+
+ Token tok = Token.createBackReference(finalRefnum);
this.hasBackReferences = true;
if (this.references == null) this.references = new Vector();
- this.references.addElement(new ReferencePosition(refnum,
this.offset-2));
+ this.references.addElement(new ReferencePosition(finalRefnum,
this.offset-2));
this.next();
return tok;
}
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