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80
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1 #{
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2 hash <- {
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3 empty <- #{
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4 empty? <- { true }
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5 }
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6 #{
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7 buckets <- #[empty empty empty empty]
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8 contains? <- :object {
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9 hv <- object hash
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10
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11 notdone <- true
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12 hashes <- #[hv (hv + 1) (hv - 1)]
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13 i <- 0
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14 ret <- false
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15 while: { if: notdone { i < 3 } } do: {
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16 hv <- hashes get: i
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17 trunc <- hv % (buckets length)
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18 if: trunc < 0 { trunc <- 0 - trunc }
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19 bucketval <- (buckets get: trunc)
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20 if: (bucketval empty?) {
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21 notdone <- false
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22 } else: {
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23 if: (bucketval eq: hv) {
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24 ret <- true
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25 notdone <- false
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26 }
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27 }
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28 i <- i + 1
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29 }
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30 ret
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31 }
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32 add <- :object {
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33 addHash: (object hash)
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34 }
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35 addHash <- :hv {
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36 makeBucket <- :hv {
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37 #{
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38 empty? <- { false }
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39 v <- hv
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40 eq <- :other { v = other }
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41 }
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42 }
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43 notdone <- true
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44 hashes <- #[hv (hv + 1) (hv - 1)]
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45 i <- 0
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46 while: { if: notdone { i < 3 } } do: {
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47 hv <- hashes get: i
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48 trunc <- hv % (buckets length)
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49 if: trunc < 0 { trunc <- 0 - trunc }
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50 bucketval <- (buckets get: trunc)
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51 if: (bucketval empty?) {
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52 buckets set: trunc (makeBucket: hv)
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53 notdone <- false
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54 } else: {
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55 if: (bucketval eq: hv) {
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56 notdone <- false
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57 }
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58 }
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59 i <- i + 1
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60 }
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61 if: notdone {
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62 newsize <- (buckets length) * 3
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63 newbucks <- #[]
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64 while: { (newbucks length) < newsize } do: {
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65 newbucks append: empty
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66 }
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67 oldbucks <- buckets
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68 buckets <- newbucks
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69 foreach: oldbucks :idx el {
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70 if: (not: (el empty?)) {
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71 addHash: (el v)
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72 }
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73 }
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74 addHash: hv
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75 }
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76 self
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77 }
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78 }
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79 }
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80 }
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