/*
* 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 org.jcodings.ApplyAllCaseFoldFunction;
import org.jcodings.Encoding;
import org.joni.ast.CClassNode;
import org.joni.ast.ConsAltNode;
import org.joni.ast.StringNode;
final class ApplyCaseFold implements ApplyAllCaseFoldFunction {
// i_apply_case_fold
public void apply(int from, int[]to, int length, Object o) {
ApplyCaseFoldArg arg = (ApplyCaseFoldArg)o;
ScanEnvironment env = arg.env;
Encoding enc = env.enc;
CClassNode cc = arg.cc;
BitSet bs = cc.bs;
if (length == 1) {
boolean inCC = cc.isCodeInCC(enc, from);
if (Config.CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS) {
if ((inCC && !cc.isNot()) || (!inCC && cc.isNot())) {
if (enc.minLength() > 1 || to[0] >= BitSet.SINGLE_BYTE_SIZE) {
cc.addCodeRange(env, to[0], to[0]);
} else {
/* /(?i:[^A-C])/.match("a") ==> fail. */
bs.set(to[0]);
}
}
} else {
if (inCC) {
if (enc.minLength() > 1 || to[0] >= BitSet.SINGLE_BYTE_SIZE) {
if (cc.isNot()) cc.clearNotFlag(enc);
cc.addCodeRange(env, to[0], to[0]);
} else {
if (cc.isNot()) {
bs.clear(to[0]);
} else {
bs.set(to[0]);
}
}
}
} // CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS
} else {
if (cc.isCodeInCC(enc, from) && (!Config.CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS || !cc.isNot())) {
StringNode node = null;
for (int i=0; i<length; i++) {
if (i == 0) {
node = new StringNode();
/* char-class expanded multi-char only
compare with string folded at match time. */
node.setAmbig();
}
node.catCode(to[i], enc);
}
ConsAltNode alt = ConsAltNode.newAltNode(node, null);
if (arg.tail == null) {
arg.altRoot = alt;
} else {
arg.tail.setCdr(alt);
}
arg.tail = alt;
}
}
}
static final ApplyCaseFold INSTANCE = new ApplyCaseFold();
}