/*
* 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;
import static org.joni.BitStatus.bsClear;
import org.jcodings.Encoding;
import org.joni.ast.Node;
import org.joni.exception.ErrorMessages;
import org.joni.exception.InternalException;
public final class ScanEnvironment {
private static final int SCANENV_MEMNODES_SIZE = 8;
int option;
final int caseFoldFlag;
final public Encoding enc;
final public Syntax syntax;
int captureHistory;
int btMemStart;
int btMemEnd;
int backrefedMem;
final public Regex reg;
int numCall;
UnsetAddrList unsetAddrList; // USE_SUBEXP_CALL
public int numMem;
int numNamed; // USE_NAMED_GROUP
public Node memNodes[];
// USE_COMBINATION_EXPLOSION_CHECK
int numCombExpCheck;
int combExpMaxRegNum;
int currMaxRegNum;
boolean hasRecursion;
int numPrecReadNotNodes;
Node precReadNotNodes[];
public ScanEnvironment(Regex regex, Syntax syntax) {
this.reg = regex;
option = regex.options;
caseFoldFlag = regex.caseFoldFlag;
enc = regex.enc;
this.syntax = syntax;
}
public void clear() {
captureHistory = bsClear();
btMemStart = bsClear();
btMemEnd = bsClear();
backrefedMem = bsClear();
numCall = 0;
numMem = 0;
numNamed = 0;
memNodes = null;
numCombExpCheck = 0;
combExpMaxRegNum = 0;
currMaxRegNum = 0;
hasRecursion = false;
numPrecReadNotNodes = 0;
precReadNotNodes = null;
}
public int addMemEntry() {
if (numMem++ == 0) {
memNodes = new Node[SCANENV_MEMNODES_SIZE];
} else if (numMem >= memNodes.length) {
Node[]tmp = new Node[memNodes.length << 1];
System.arraycopy(memNodes, 0, tmp, 0, memNodes.length);
memNodes = tmp;
}
return numMem;
}
public void setMemNode(int num, Node node) {
if (numMem >= num) {
memNodes[num] = node;
} else {
throw new InternalException(ErrorMessages.ERR_PARSER_BUG);
}
}
public void pushPrecReadNotNode(Node node) {
numPrecReadNotNodes++;
if (precReadNotNodes == null) {
precReadNotNodes = new Node[SCANENV_MEMNODES_SIZE];
} else if (numPrecReadNotNodes >= precReadNotNodes.length) {
Node[]tmp = new Node[precReadNotNodes.length << 1];
System.arraycopy(precReadNotNodes, 0, tmp, 0, precReadNotNodes.length);
precReadNotNodes = tmp;
}
precReadNotNodes[numPrecReadNotNodes - 1] = node;
}
public void popPrecReadNotNode(Node node) {
if (precReadNotNodes != null && precReadNotNodes[numPrecReadNotNodes - 1] == node) {
precReadNotNodes[numPrecReadNotNodes - 1] = null;
numPrecReadNotNodes--;
}
}
public Node currentPrecReadNotNode() {
if (numPrecReadNotNodes > 0) {
return precReadNotNodes[numPrecReadNotNodes - 1];
}
return null;
}
public int convertBackslashValue(int c) {
if (syntax.opEscControlChars()) {
switch (c) {
case 'n': return '\n';
case 't': return '\t';
case 'r': return '\r';
case 'f': return '\f';
case 'a': return '\007';
case 'b': return '\010';
case 'e': return '\033';
case 'v':
if (syntax.op2EscVVtab()) return 11; // ???
break;
default:
break;
}
}
return c;
}
void ccEscWarn(String s) {
if (Config.USE_WARN) {
if (syntax.warnCCOpNotEscaped() && syntax.backSlashEscapeInCC()) {
reg.warnings.warn("character class has '" + s + "' without escape");
}
}
}
void closeBracketWithoutEscapeWarn(String s) {
if (Config.USE_WARN) {
if (syntax.warnCCOpNotEscaped()) {
reg.warnings.warn("regular expression has '" + s + "' without escape");
}
}
}
}