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  1. JDK
  2. JDK-8237514

Spec Clarification - ByteBuffer::alignmentOffset Spec

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    • b32
    • b35

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        As per the updated spec:
        https://download.java.net/java/early_access/jdk14/docs/api/java.base/java/nio/ByteBuffer.html#alignmentOffset(int,int)

        "Specifically, the index should either be decremented by the return value, or incremented by the unit size minus the return value. Therefore given

         int value = alignmentOffset(index, unitSize)
        then the identities
         alignmentOffset(index - value, unitSize) == 0
        and
         alignmentOffset(index + (unitSize - value), unitSize) == 0
        must hold."

        I see it' s a normative spec.

        But the mentioned statement is not valid for some values of index and unitSize.

        Please see the attached code snippet.
        It will pass some times and throws IllegalArgumentException sometimes.

        Can you please clarify this.

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                bpb Brian Burkhalter
                kganapureddy Krushnareddy Ganapureddy
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