Fix ge() fringe case (#135)
why: The point `high(P)` is treated separately and added to the top adjacent interval or is treated as a sigle point interval.
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@ -779,7 +779,9 @@ proc ge*[P,S](ds: IntervalSetRef[P,S]; minPt: P): IntervalRc[P,S] =
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return ok(Interval[P,S].new(rc.value.left, high(P)))
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return ok(Interval[P,S].new(rc.value))
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if ds.lastHigh:
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return ok(Interval[P,S].new(high(P),high(P)))
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const preHigh = high(P) - scalarOne
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if ds.covered(preHigh,preHigh) == scalarZero:
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return ok(Interval[P,S].new(high(P),high(P)))
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err()
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proc ge*[P,S](ds: IntervalSetRef[P,S]): IntervalRc[P,S] =
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@ -793,13 +795,18 @@ proc le*[P,S](ds: IntervalSetRef[P,S]; maxPt: P): IntervalRc[P,S] =
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if rc.isOk:
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# only the left end of segment [left,right) is guaranteed to be <= maxPt
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if rc.value.right - scalarOne <= maxPt:
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if high(P) <= maxPt and ds.lastHigh:
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# Check for fringe case intervals [a,b] gap [high(P),high(P)] <= maxPt
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if rc.value.right < high(P):
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return ok(Interval[P,S].new(high(P),high(P)))
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# Check for fringe case intervals [a,b] + [high(P),high(P)] <= maxPt
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if ds.lastHigh:
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if high(P) <= maxPt:
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# Check for fringe case intervals [a,b] gap [high(P),high(P)] <= maxPt
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if rc.value.right < high(P):
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return ok(Interval[P,S].new(high(P),high(P)))
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# Check for fringe case intervals [a,b] + [high(P),high(P)] <= maxPt
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if high(P) <= rc.value.right:
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return ok(Interval[P,S].new(rc.value.left,high(P)))
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# So maxPt < high(P)
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if high(P) <= rc.value.right:
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return ok(Interval[P,S].new(rc.value.left,high(P)))
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# Now `maxPt` is fully within the inner part of `[left,high(P)]`
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return err()
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return ok(Interval[P,S].new(rc.value))
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# find the next smaller one
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let xc = ds.leftPos.lt(rc.value.key)
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@ -177,6 +177,7 @@ suite "IntervalSet: Intervals of FancyPoint entries over FancyScalar":
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check br.total.truncate(uint64) == (uHigh - 10000000) + 1
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check br.verify.isOk
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test "More edge cases detected and fixed":
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br.clear()
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check br.total == 0 and br.chunks == 0
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check br.merge(uHigh,uHigh) == 1
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@ -187,7 +188,6 @@ suite "IntervalSet: Intervals of FancyPoint entries over FancyScalar":
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check ivSet == false
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(ivVal, ivSet) = (iv, true)
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check ivVal == iv(uHigh,uHigh)
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block:
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var (ivVal, ivSet) = (iv(0,0), false)
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for iv in br.decreasing:
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@ -200,6 +200,25 @@ suite "IntervalSet: Intervals of FancyPoint entries over FancyScalar":
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check br.merge(1477152,uHigh) == uHigh - 1477151
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check br.merge(1477151,1477151) == 1
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br.clear() # from blockchain snap sync odd behaviour
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check br.merge(0,uHigh) == 0
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check br.chunks == 1
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check br.total == 0
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check br.ge(1000) == ivError
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check 0 < br.reduce(99999,uHigh-1)
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check br.ge(1000) == iv(uHigh,uHigh)
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br.clear()
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check br.merge(0,uHigh) == 0
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check br.chunks == 1
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check br.total == 0
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check br.le(uHigh) == iv(0,uHigh)
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check br.le(uHigh-1) == ivError
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check 0 < br.reduce(99999,uHigh-1)
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check br.le(uHigh) == iv(uHigh,uHigh)
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check br.le(uHigh-1) == iv(0,99998)
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check br.le(uHigh-2) == iv(0,99998)
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test "Merge disjunct intervals on 1st set":
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br.clear()
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check br.merge( 0, 99) == 100
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