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Bug 355991. Duplicate name detection based on {fileLocation, linkage,

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fileOffset} tuple.
This commit is contained in:
Sergey Prigogin 2011-11-10 18:12:07 -08:00
parent 551220367b
commit 5a1f9d47a9
1 changed files with 47 additions and 35 deletions
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82
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/CIndex.java
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@ -20,6 +20,7 @@ import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
@ -179,47 +180,18 @@ public class CIndex implements IIndex {
binding= bindings[0];
}
// Maps a file location to -1 if the file belongs to an earlier index fragment,
// or to the index of the last checked index fragment plus one, if the file doesn't belong
// to any of the index fragments up to the last checked one.
HashMap<IIndexFileLocation, Integer> fileCheckCache = new HashMap<IIndexFileLocation, Integer>();
// Collect the names from all fragments. Since the same file may be represented by multiple
// variants in one or more index fragments, we need to filter out duplicate names.
// See bug 192352.
HashSet<NameKey> encounteredNames = new HashSet<NameKey>();
for (int i = 0; i < fPrimaryFragmentCount; i++) {
IIndexFragment fragment = fFragments[i];
final IIndexFragmentName[] names = fragment.findNames(binding, flags);
final IIndexFragmentName[] names = fFragments[i].findNames(binding, flags);
for (IIndexFragmentName name : names) {
IIndexFileLocation location = name.getFile().getLocation();
Integer checkState = fileCheckCache.get(location);
int checkOffset = checkState == null ? 0 : checkState.intValue();
if (checkOffset >= 0) {
for (; checkOffset < i; checkOffset++) {
IIndexFragment fragment2 = fFragments[checkOffset];
if (fragment2.getFiles(location).length != 0) {
checkOffset = -1;
break;
}
}
fileCheckCache.put(location, Integer.valueOf(checkOffset));
}
if (checkOffset == i) {
if (encounteredNames.add(new NameKey(name))) {
result.add(name);
}
}
}
// // bug 192352, files can reside in multiple fragments, remove duplicates
// if (fragCount > 1 || (flags & IIndex.SEARCH_ACROSS_LANGUAGE_BOUNDARIES) != 0) {
// HashMap<String, IIndexFile> fileMap= new HashMap<String, IIndexFile>();
// for (Iterator<IIndexFragmentName> iterator = result.iterator(); iterator.hasNext();) {
// final IIndexFragmentName name = iterator.next();
// final IIndexFile file= name.getFile();
// final String fileKey= name.getFile().getLocation().getURI().toString();
// final IIndexFile otherFile= fileMap.get(fileKey);
// if (otherFile == null) {
// fileMap.put(fileKey, file);
// } else if (!otherFile.equals(file)) { // same file in another fragment
// iterator.remove();
// }
// }
// }
return result.toArray(new IIndexName[result.size()]);
}
@ -775,4 +747,44 @@ public class CIndex implements IIndex {
}
return result;
}
/**
* A key used to uniquely identify an IIndexFragmentName object. Uniqueness is guaranteed only
* for names corresponding to the same binding.
*/
private static final class NameKey {
private final IIndexFileLocation location;
private final int linkageID;
private final int offset;
NameKey(IIndexFragmentName name) throws CoreException {
IIndexFile file = name.getFile();
location = file.getLocation();
linkageID = file.getLinkageID();
offset = name.getNodeOffset();
}
@Override
public int hashCode() {
return (location.hashCode() * 31 + linkageID) * 31 + offset;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
NameKey other = (NameKey) obj;
if (offset != other.offset)
return false;
if (linkageID != other.linkageID)
return false;
if (!location.equals(other.location))
return false;
return true;
}
}
}