mirror of https://github.com/status-im/nim-eth.git
39 lines
1.1 KiB
Nim
39 lines
1.1 KiB
Nim
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# Copyright (c) 2021 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [Defect].}
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import
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chronos
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# compare if lhs is less than rhs, taking wrapping
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# into account. i.e high(lhs) < 0 == true
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proc wrapCompareLess*(lhs: uint32, rhs: uint32): bool =
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let distDown = (lhs - rhs)
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let distUp = (rhs - lhs)
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# if the distance walking up is shorter, lhs
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# is less than rhs. If the distance walking down
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# is shorter, then rhs is less than lhs
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return distUp < distDown
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proc wrapCompareLess*(lhs: uint16, rhs: uint16): bool =
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let distDown = (lhs - rhs)
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let distUp = (rhs - lhs)
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return distUp < distDown
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proc max*(a, b: Duration): Duration =
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if (a > b):
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a
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else:
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b
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proc min*(a, b: Duration): Duration =
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if (a < b):
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a
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else:
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b
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