LSCUXT3235I5ZZPZM2MMGLECHU2LAX2TKLRHDULONDAS5JEWTB7QC A6E5SE5JPWUJJYIUS4CF7NMB5GM2SIIUXUZASSOVD467YWI5SCQQC KJLCU4X5Z3CZM4AORMWIKOPBWPVTDMLK4LYH7UXBJFUGL7AUQCSQC 5SFTBD4FW6GQPKRUJBAII5R2EZPDYG6CH57BIJD4IVZBE6JZB2ZQC 6W6OJAUT3KLOXXKYR4GA3MG4ACLO2T4KX3SGD2KZDX6MYEZYTPHAC TIAIRD7L5GWH22TOLDAGCIDCJDZ53YWK3KHQOH3EIU7RZEOEP32AC CNJGJCJZ6LRHHIRSRATSE3D3Z5OQGSSTDMXCPVXSKRQLYJFME6IAC GUD2J453E3UTRJZIEEUUJ3ZIGL72ETUXTO57XQIZ2Y3ZU3C2R55QC ZL7ZSOEOGP2E24UEFC5VVPN5GTL3EUL34FA7F47WWWFPHJH2RS2AC 32SDOYNGPOAAMEQMZLZUE3XE6D5CFSZU6M3JDRERUVPAB4TLZOOAC KFKFELOTH4NL4DMXXWJ36OK62HWNJ7JJTHWA76CYHWGTGXMRGYFQC XCVPXP4UBFU25NF6VQC3MEYHHH45RL2UXM5TA6O23NA64FPCCCJQC /-- Construct from bytes -/def PieceTable.fromByteArray (bytes : ByteArray) (buildLeafBits : Bool := true) : PieceTable :=
/-- Construct from bytes. `buildOnEdit` controls bloom rebuilding during subsequent edits. -/def PieceTable.fromByteArray (bytes : ByteArray) (buildLeafBits : Bool := true) (buildOnEdit : Bool := false) : PieceTable :=
original := bytes, addBuffers := #[], tree := PieceTree.empty, bloomBuildLeafBits := buildLeafBits,
-- Build bloom bits during initial load if enabled, regardless of edit policy.original := bytes, addBuffers := #[], tree := PieceTree.empty, bloomBuildLeafBits := buildLeafBits, bloomBuildOnEdit := true,
/-- Construct from initial string -/def PieceTable.fromString (s : String) (buildLeafBits : Bool := true) : PieceTable :=PieceTable.fromByteArray s.toUTF8 buildLeafBits
/-- Construct from initial string. -/def PieceTable.fromString (s : String) (buildLeafBits : Bool := true) (buildOnEdit : Bool := false) : PieceTable :=PieceTable.fromByteArray s.toUTF8 buildLeafBits buildOnEdit
/-- Rolling update for 3-byte polynomial hash:h' = ((h - out*base^2) * base + in) mod BloomBits. -/private def rollHash3 (h : Nat) (outB inB : UInt8) (base baseSq : Nat) : Nat :=let m := ViE.BloomBitslet remove := (outB.toNat * baseSq) % mlet trimmed := if h >= remove then h - remove else h + m - remove((trimmed * base) + inB.toNat) % m
out := addTrigramToBloom out arr[i]! arr[i + 1]! arr[i + 2]!return out
let b0 := arr[i]!let b1 := arr[i + 1]!let b2 := arr[i + 2]!let h1 := hash1 b0 b1 b2let h2 := hash2 b0 b1 b2mask := setMaskBit mask h1mask := setMaskBit mask h2return applyMaskToBloom bloom mask
def addBytesToBloom (bloom : ByteArray) (carry : Array UInt8) (bytes : ByteArray) : (ByteArray × Array UInt8) :=let arr := carry ++ bytes.datalet bloom' := addTrigramsFromArray bloom arrlet carry' := takeLastBytes arr 2(bloom', carry')
def addBytesToBloom (bloom : ByteArray) (carry : Array UInt8) (bytes : ByteArray) : (ByteArray × Array UInt8) := Id.run dolet total := carry.size + bytes.sizelet carry' :=if total <= 2 thentakeLastBytes (carry ++ bytes.data) 2elselet start := total - 2let b0 :=if start < carry.size thencarry[start]!elsebytes[start - carry.size]!let b1 :=if start + 1 < carry.size thencarry[start + 1]!elsebytes[start + 1 - carry.size]!#[b0, b1]if total < 3 || bloom.size == 0 thenreturn (bloom, carry')let limit := total - 2let getAt (i : Nat) : UInt8 :=if i < carry.size then carry[i]! else bytes[i - carry.size]!let mut h1 := hash1 (getAt 0) (getAt 1) (getAt 2)let mut h2 := hash2 (getAt 0) (getAt 1) (getAt 2)let mut mask : ByteArray := ByteArray.mk (Array.replicate bloom.size (0 : UInt8))for i in [0:limit] domask := setMaskBit mask h1mask := setMaskBit mask h2if i + 3 < total thenlet outB := getAt ilet inB := getAt (i + 3)h1 := rollHash3 h1 outB inB 31 961h2 := rollHash3 h2 outB inB 131 17161return (applyMaskToBloom bloom mask, carry')