The OptExactInfo.java Java example source code
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package jdk.nashorn.internal.runtime.regexp.joni;
final class OptExactInfo {
static final int OPT_EXACT_MAXLEN = 24;
final MinMaxLen mmd = new MinMaxLen();
final OptAnchorInfo anchor = new OptAnchorInfo();
boolean reachEnd;
boolean ignoreCase;
final char chars[] = new char[OPT_EXACT_MAXLEN];
int length;
boolean isFull() {
return length >= OPT_EXACT_MAXLEN;
}
void clear() {
mmd.clear();
anchor.clear();
reachEnd = false;
ignoreCase = false;
length = 0;
}
void copy(OptExactInfo other) {
mmd.copy(other.mmd);
anchor.copy(other.anchor);
reachEnd = other.reachEnd;
ignoreCase = other.ignoreCase;
length = other.length;
System.arraycopy(other.chars, 0, chars, 0, OPT_EXACT_MAXLEN);
}
void concat(OptExactInfo other) {
if (!ignoreCase && other.ignoreCase) {
if (length >= other.length) return; /* avoid */
ignoreCase = true;
}
int p = 0; // add->s;
int end = p + other.length;
int i;
for (i = length; p < end;) {
if (i + 1 > OPT_EXACT_MAXLEN) break;
chars[i++] = other.chars[p++];
}
length = i;
reachEnd = (p == end ? other.reachEnd : false);
OptAnchorInfo tmp = new OptAnchorInfo();
tmp.concat(anchor, other.anchor, 1, 1);
if (!other.reachEnd) tmp.rightAnchor = 0;
anchor.copy(tmp);
}
// ?? raw is not used here
void concatStr(char[] lchars, int p, int end, boolean raw) {
int i;
for (i = length; p < end && i < OPT_EXACT_MAXLEN;) {
if (i + 1 > OPT_EXACT_MAXLEN) break;
chars[i++] = lchars[p++];
}
length = i;
}
void altMerge(OptExactInfo other, OptEnvironment env) {
if (other.length == 0 || length == 0) {
clear();
return;
}
if (!mmd.equal(other.mmd)) {
clear();
return;
}
int i;
for (i = 0; i < length && i < other.length; i++) {
if (chars[i] != other.chars[i]) break;
}
if (!other.reachEnd || i<other.length || i
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