mirror of
https://github.com/logos-storage/nim-groth16.git
synced 2026-07-22 16:39:48 +00:00
65 lines
1.5 KiB
Nim
65 lines
1.5 KiB
Nim
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#
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# miscellaneous routines
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#
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import strformat
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import times, strutils
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#-------------------------------------------------------------------------------
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func seconds*(x: float): string = fmt"{x:.4f} seconds"
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func quoted*(s: string): string = fmt"`{s:s}`"
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#-------------------------------------------------------------------------------
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template withMeasureTime*(doPrint: bool, text: string, code: untyped) =
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block:
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if doPrint:
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let t0 = epochTime()
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code
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let elapsed = epochTime() - t0
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let elapsedStr = elapsed.formatFloat(format = ffDecimal, precision = 4)
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echo ( text & " took " & elapsedStr & " seconds" )
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else:
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code
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#-------------------------------------------------------------------------------
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func delta*(i, j: int) : int =
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return (if (i == j): 1 else: 0)
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#-------------------------------------------------------------------------------
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func floorLog2* (x : int) : int =
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var k = -1
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var y = x
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while (y > 0):
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k += 1
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y = y shr 1
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return k
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func ceilingLog2* (x : int) : int =
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if (x==0):
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return -1
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else:
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return (floorLog2(x-1) + 1)
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func isPowerOfTwo*( N: int): bool =
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let reN = (1 shl ceilingLog2(N))
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return ( N == reN )
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#-------------------------------------------------------------------------------
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#[
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func rotateSeq[T](xs: seq[T], ofs: int): seq[T] =
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let n = xs.len
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var ys : seq[T]
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for i in (0..<n):
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ys.add( xs[ (i+n+ofs) mod n ] )
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return ys
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]#
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#-------------------------------------------------------------------------------
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