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Merge "Fix a bug where a node size would be seen as increasing."

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Jean Chalard 2012-04-23 22:19:19 -07:00 committed by Android (Google) Code Review
commit cbebbaf065
1 changed files with 25 additions and 5 deletions
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30
java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
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@ -174,6 +174,13 @@ public class BinaryDictInputOutput {
private static final int MAX_TERMINAL_FREQUENCY = 255;
// Arbitrary limit to how much passes we consider address size compression should
// terminate in. At the time of this writing, our largest dictionary completes
// compression in five passes.
// If the number of passes exceeds this number, makedict bails with an exception on
// suspicion that a bug might be causing an infinite loop.
private static final int MAX_PASSES = 24;
/**
* A class grouping utility function for our specific character encoding.
*/
@ -510,14 +517,22 @@ public class BinaryDictInputOutput {
* Each node stores its tentative address. During dictionary address computing, these
* are not final, but they can be used to compute the node size (the node size depends
* on the address of the children because the number of bytes necessary to store an
* address depends on its numeric value.
* address depends on its numeric value. The return value indicates whether the node
* contents (as in, any of the addresses stored in the cache fields) have changed with
* respect to their previous value.
*
* @param node the node to compute the size of.
* @param dict the dictionary in which the word/attributes are to be found.
* @return false if none of the cached addresses inside the node changed, true otherwise.
*/
private static void computeActualNodeSize(Node node, FusionDictionary dict) {
private static boolean computeActualNodeSize(Node node, FusionDictionary dict) {
boolean changed = false;
int size = getGroupCountSize(node);
for (CharGroup group : node.mData) {
if (group.mCachedAddress != node.mCachedAddress + size) {
changed = true;
group.mCachedAddress = node.mCachedAddress + size;
}
int groupSize = GROUP_FLAGS_SIZE + getGroupCharactersSize(group);
if (group.isTerminal()) groupSize += GROUP_FREQUENCY_SIZE;
if (null != group.mChildren) {
@ -538,7 +553,11 @@ public class BinaryDictInputOutput {
group.mCachedSize = groupSize;
size += groupSize;
}
node.mCachedSize = size;
if (node.mCachedSize != size) {
node.mCachedSize = size;
changed = true;
}
return changed;
}
/**
@ -594,13 +613,14 @@ public class BinaryDictInputOutput {
changesDone = false;
for (Node n : flatNodes) {
final int oldNodeSize = n.mCachedSize;
computeActualNodeSize(n, dict);
final boolean changed = computeActualNodeSize(n, dict);
final int newNodeSize = n.mCachedSize;
if (oldNodeSize < newNodeSize) throw new RuntimeException("Increased size ?!");
if (oldNodeSize != newNodeSize) changesDone = true;
changesDone |= changed;
}
stackNodes(flatNodes);
++passes;
if (passes > MAX_PASSES) throw new RuntimeException("Too many passes - probably a bug");
} while (changesDone);
final Node lastNode = flatNodes.get(flatNodes.size() - 1);