96 lines
2.7 KiB
Java
96 lines
2.7 KiB
Java
package net.minecraft.util.parsing.packrat;
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import java.util.ArrayList;
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import java.util.List;
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import net.minecraft.Util;
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public interface ErrorCollector<S> {
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void store(int cursor, SuggestionSupplier<S> suggestions, Object reason);
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default void store(int cursor, Object reason) {
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this.store(cursor, SuggestionSupplier.empty(), reason);
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}
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void finish(int cursor);
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public static class LongestOnly<S> implements ErrorCollector<S> {
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private ErrorCollector.LongestOnly.MutableErrorEntry<S>[] entries = new ErrorCollector.LongestOnly.MutableErrorEntry[16];
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private int nextErrorEntry;
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private int lastCursor = -1;
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private void discardErrorsFromShorterParse(int cursor) {
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if (cursor > this.lastCursor) {
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this.lastCursor = cursor;
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this.nextErrorEntry = 0;
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}
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}
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@Override
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public void finish(int cursor) {
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this.discardErrorsFromShorterParse(cursor);
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}
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@Override
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public void store(int cursor, SuggestionSupplier<S> suggestions, Object reason) {
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this.discardErrorsFromShorterParse(cursor);
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if (cursor == this.lastCursor) {
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this.addErrorEntry(suggestions, reason);
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}
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}
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private void addErrorEntry(SuggestionSupplier<S> suggestions, Object reason) {
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int i = this.entries.length;
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if (this.nextErrorEntry >= i) {
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int j = Util.growByHalf(i, this.nextErrorEntry + 1);
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ErrorCollector.LongestOnly.MutableErrorEntry<S>[] mutableErrorEntrys = new ErrorCollector.LongestOnly.MutableErrorEntry[j];
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System.arraycopy(this.entries, 0, mutableErrorEntrys, 0, i);
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this.entries = mutableErrorEntrys;
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}
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int j = this.nextErrorEntry++;
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ErrorCollector.LongestOnly.MutableErrorEntry<S> mutableErrorEntry = this.entries[j];
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if (mutableErrorEntry == null) {
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mutableErrorEntry = new ErrorCollector.LongestOnly.MutableErrorEntry<>();
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this.entries[j] = mutableErrorEntry;
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}
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mutableErrorEntry.suggestions = suggestions;
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mutableErrorEntry.reason = reason;
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}
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public List<ErrorEntry<S>> entries() {
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int i = this.nextErrorEntry;
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if (i == 0) {
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return List.of();
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} else {
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List<ErrorEntry<S>> list = new ArrayList(i);
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for (int j = 0; j < i; j++) {
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ErrorCollector.LongestOnly.MutableErrorEntry<S> mutableErrorEntry = this.entries[j];
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list.add(new ErrorEntry<>(this.lastCursor, mutableErrorEntry.suggestions, mutableErrorEntry.reason));
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}
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return list;
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}
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}
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public int cursor() {
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return this.lastCursor;
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}
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static class MutableErrorEntry<S> {
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SuggestionSupplier<S> suggestions = SuggestionSupplier.empty();
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Object reason = "empty";
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}
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}
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public static class Nop<S> implements ErrorCollector<S> {
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@Override
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public void store(int cursor, SuggestionSupplier<S> suggestions, Object reason) {
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}
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@Override
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public void finish(int cursor) {
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}
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}
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}
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