/*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.joni.ast;
import org.joni.ScanEnvironment;
import org.joni.exception.ErrorMessages;
import org.joni.exception.ValueException;
public final class BackRefNode extends StateNode {
//private static int NODE_BACKREFS_SIZE = 6;
//int state;
public int backNum;
public int back[];
public int nestLevel;
public BackRefNode(int backNum, int[]backRefs, boolean byName, ScanEnvironment env) {
this.backNum = backNum;
if (byName) setNameRef();
for (int i=0; i<backNum; i++) {
if (backRefs[i] <= env.numMem && env.memNodes[backRefs[i]] == null) {
setRecursion(); /* /...(\1).../ */
break;
}
}
back = new int[backNum];
System.arraycopy(backRefs, 0, back, 0, backNum); // shall we really dup it ???
}
// #ifdef USE_BACKREF_AT_LEVEL
public BackRefNode(int backNum, int[]backRefs, boolean byName, boolean existLevel, int nestLevel, ScanEnvironment env) {
this(backNum, backRefs, byName, env);
if (existLevel) {
//state |= NST_NEST_LEVEL;
setNestLevel();
this.nestLevel = nestLevel;
}
}
@Override
public int getType() {
return BREF;
}
@Override
public String getName() {
return "Back Ref";
}
@Override
public String toString(int level) {
StringBuilder value = new StringBuilder(super.toString(level));
value.append("\n backNum: " + backNum);
String backs = "";
for (int i=0; i<back.length; i++) backs += back[i] + ", ";
value.append("\n back: " + backs);
value.append("\n nextLevel: " + nestLevel);
return value.toString();
}
public void renumber(int[]map) {
if (!isNameRef()) throw new ValueException(ErrorMessages.ERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED);
int oldNum = backNum;
int pos = 0;
for (int i=0; i<oldNum; i++) {
int n = map[back[i]];
if (n > 0) {
back[pos] = n;
pos++;
}
}
backNum = pos;
}
}