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am 2aea34fb: Add updateParentAddress.

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* commit '2aea34fb31f1a8a5fe24cccd1b9aab4908f2f8e2':
  Add updateParentAddress.
This commit is contained in:
Yuichiro Hanada 2012-09-26 01:33:01 -07:00 committed by Android Git Automerger
commit 77d67586d1
1 changed files with 30 additions and 0 deletions
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30
java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
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@ -246,4 +246,34 @@ public class BinaryDictIOUtils {
buffer.position(wordPosition);
buffer.put((byte)newFlags);
}
private static void putSInt24(final FusionDictionaryBufferInterface buffer,
final int value) {
final int absValue = Math.abs(value);
buffer.put((byte)(((value < 0 ? 0x80 : 0) | (absValue >> 16)) & 0xFF));
buffer.put((byte)((absValue >> 8) & 0xFF));
buffer.put((byte)(absValue & 0xFF));
}
/**
* Update a parent address in a CharGroup that is addressed by groupOriginAddress.
*
* @param buffer the buffer to write.
* @param groupOriginAddress the address of the group.
* @param newParentAddress the absolute address of the parent.
* @param formatOptions file format options.
*/
public static void updateParentAddress(final FusionDictionaryBufferInterface buffer,
final int groupOriginAddress, final int newParentAddress,
final FormatOptions formatOptions) {
final int originalPosition = buffer.position();
buffer.position(groupOriginAddress);
if (!formatOptions.mSupportsDynamicUpdate) {
throw new RuntimeException("this file format does not support parent addresses");
}
final int flags = buffer.readUnsignedByte();
final int parentOffset = newParentAddress - groupOriginAddress;
putSInt24(buffer, parentOffset);
buffer.position(originalPosition);
}
}