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franz1981/brenchless_fun.java

Last active October 23, 2018 14:07
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brenchless_fun.java
private static long minusOneIfNotLongMax(long value) {
final long valueMinusOne = value - 1;
final long diffFromValue = value - Long.MAX_VALUE;
final long tmp = (diffFromValue - 1) >> 63;
final long mask = ((diffFromValue >> 63) ^ tmp) & tmp;
return (value & mask) | (valueMinusOne & (~mask));
}
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