package org.joni;
import org.joni.constants.internal.AnchorType;
final class OptAnchorInfo implements AnchorType {
int leftAnchor;
int rightAnchor;
void clear() {
leftAnchor = rightAnchor = 0;
}
void copy(OptAnchorInfo other) {
leftAnchor = other.leftAnchor;
rightAnchor = other.rightAnchor;
}
void concat(OptAnchorInfo left, OptAnchorInfo right, int leftLength, int rightLength) {
leftAnchor = left.leftAnchor;
if (leftLength == 0) leftAnchor |= right.leftAnchor;
rightAnchor = right.rightAnchor;
if (rightLength == 0) {
rightAnchor |= left.rightAnchor;
} else {
rightAnchor |= left.rightAnchor & AnchorType.PREC_READ_NOT;
}
}
boolean isSet(int anchor) {
if ((leftAnchor & anchor) != 0) return true;
return (rightAnchor & anchor) != 0;
}
void add(int anchor) {
if (isLeftAnchor(anchor)) {
leftAnchor |= anchor;
} else {
rightAnchor |= anchor;
}
}
void remove(int anchor) {
if (isLeftAnchor(anchor)) {
leftAnchor &= ~anchor;
} else {
rightAnchor &= ~anchor;
}
}
void altMerge(OptAnchorInfo other) {
leftAnchor &= other.leftAnchor;
rightAnchor &= other.rightAnchor;
}
static boolean isLeftAnchor(int anchor) {
return !(anchor == END_BUF || anchor == SEMI_END_BUF ||
anchor == END_LINE || anchor == PREC_READ ||
anchor == PREC_READ_NOT);
}
static String anchorToString(int anchor) {
StringBuffer s = new StringBuffer("[");
if ((anchor & AnchorType.BEGIN_BUF) !=0 ) s.append("begin-buf ");
if ((anchor & AnchorType.BEGIN_LINE) !=0 ) s.append("begin-line ");
if ((anchor & AnchorType.BEGIN_POSITION) !=0 ) s.append("begin-pos ");
if ((anchor & AnchorType.END_BUF) !=0 ) s.append("end-buf ");
if ((anchor & AnchorType.SEMI_END_BUF) !=0 ) s.append("semi-end-buf ");
if ((anchor & AnchorType.END_LINE) !=0 ) s.append("end-line ");
if ((anchor & AnchorType.ANYCHAR_STAR) !=0 ) s.append("anychar-star ");
if ((anchor & AnchorType.ANYCHAR_STAR_ML) !=0 ) s.append("anychar-star-pl ");
s.append("]");
return s.toString();
}
}