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* conditions and the following disclaimer.
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
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package com.oracle.truffle.llvm.parser.listeners;
import com.oracle.truffle.llvm.parser.model.ValueSymbol;
import com.oracle.truffle.llvm.parser.scanner.RecordBuffer;
import java.util.ArrayList;
import java.util.List;
final class StringTable implements ParserListener {
private static final long BYTE_MASK = 0xffL;
private final List<NameRequest> requests = new ArrayList<>();
private String table = null;
StringTable() {
}
@Override
public void record(RecordBuffer buffer) {
byte[] bytes = new byte[buffer.size() * Long.BYTES];
int curByte = 0;
while (buffer.remaining() > 0) {
long l = buffer.read();
for (int j = 0; j < Long.BYTES; j++) {
bytes[curByte++] = (byte) (l & BYTE_MASK);
l >>>= Byte.SIZE;
}
}
table = new String(bytes);
}
@Override
public void exit() {
for (NameRequest request : requests) {
request.resolve();
}
requests.clear();
}
void requestName(int offset, int length, ValueSymbol target) {
if (length <= 0 || offset < 0) {
return;
}
// the STRTAB block's content may be forward referenced
if (table != null) {
target.setName(get(offset, length));
} else {
requests.add(new NameRequest(offset, length, target));
}
}
private String get(int offset, int size) {
if (offset + size < table.length()) {
return table.substring(offset, offset + size);
} else {
return "";
}
}
private final class NameRequest {
private final int offset;
private final int length;
private final ValueSymbol target;
private NameRequest(int offset, int length, ValueSymbol target) {
this.offset = offset;
this.length = length;
this.target = target;
}
void resolve() {
target.setName(get(offset, length));
}
}
}