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use non empty lists as indexes in Fun_vec

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Simon Cruanes 2018-02-15 08:30:16 -06:00
parent 74d3b0f29f
commit bff1464560
1 changed files with 16 additions and 34 deletions
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50
src/data/CCFun_vec.ml
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@ -156,17 +156,8 @@ let length {size;_} = size
let return x = {leaves=A.return x; subs=A.empty; size=1}
type idx_l =
| L1 of int
| L2 of int * int
| L3 of int * int * int
| L4 of int * int * int * int
| L_cons of int * idx_l
let cons_idx x1 l = match l with
| L1 x2 -> L2 (x1,x2)
| L2 (x2,x3) -> L3 (x1,x2,x3)
| L3 (x2,x3,x4) -> L4 (x1,x2,x3,x4)
| L4 _ | L_cons _ -> L_cons (x1, l)
| I_one of int
| I_cons of int * idx_l
(* split an index into a low and high parts *)
let low_idx_ i = i land A.mask
@ -179,20 +170,17 @@ let combine_idx i j = (i lsl A.length_log) lor j
let split_idx i : idx_l =
let rec aux high low =
if high = 0 then low
else if high < A.max_length then cons_idx (high-1) low
else aux (high_idx_ high) (cons_idx (low_idx_ high) low)
else if high < A.max_length then I_cons (high-1, low)
else aux (high_idx_ high) (I_cons (low_idx_ high, low))
in
aux (high_idx_ i) (L1 (low_idx_ i))
aux (high_idx_ i) (I_one(low_idx_ i))
let get_ (i:int) (m:'a t) : 'a =
let rec aux l m = match l with
| L1 x1 ->
assert (x1 < A.length m.leaves);
A.get m.leaves x1
| L2 (x1,x2) -> aux (L1 x2) (A.get m.subs x1)
| L3 (x1,x2,x3) -> aux (L2 (x2,x3)) (A.get m.subs x1)
| L4 (x1,x2,x3,x4) -> aux (L3 (x2,x3,x4)) (A.get m.subs x1)
| L_cons (x1,x2) -> aux x2 (A.get m.subs x1)
| I_one x ->
assert (x < A.length m.leaves);
A.get m.leaves x
| I_cons (x, tl) -> aux tl (A.get m.subs x)
in
aux (split_idx i) m
@ -210,15 +198,12 @@ let get i v =
let push_ (i:int) (x:'a) (m:'a t) : 'a t =
let rec aux l m = match l with
| L1 x1 ->
assert (x1=A.length m.leaves);
| I_one i ->
assert (i=A.length m.leaves);
assert (A.length m.leaves < A.max_length);
assert (A.is_empty m.subs);
{m with size=m.size+1; leaves=A.push x m.leaves}
| L2 (x1,x2) -> aux_replace_sub (L1 x2) m x1
| L3 (x1,x2,x3) -> aux_replace_sub (L2 (x2,x3)) m x1
| L4 (x1,x2,x3,x4) -> aux_replace_sub (L3 (x2,x3,x4)) m x1
| L_cons (x1,x2) -> aux_replace_sub x2 m x1
| I_cons (i,tl) -> aux_replace_sub tl m i
and aux_replace_sub l m x =
assert (x <= A.length m.subs);
(* insert in subtree, possibly a new one *)
@ -234,14 +219,11 @@ let push x (v:_ t) : _ t = push_ v.size x v
let pop_ i (m:'a t) : 'a * 'a t =
let rec aux l m = match l with
| L1 x1 ->
assert (x1+1 = A.length m.leaves); (* last one *)
let x = A.get m.leaves x1 in
| I_one x ->
assert (x+1 = A.length m.leaves); (* last one *)
let x = A.get m.leaves x in
x, {m with size=m.size-1; leaves=A.pop m.leaves}
| L2 (x1,x2) -> aux_remove_sub (L1 x2) m x1
| L3 (x1,x2,x3) -> aux_remove_sub (L2 (x2,x3)) m x1
| L4 (x1,x2,x3,x4) -> aux_remove_sub (L3 (x2,x3,x4)) m x1
| L_cons (x1,x2) -> aux_remove_sub x2 m x1
| I_cons (x,tl) -> aux_remove_sub tl m x
and aux_remove_sub l m x =
let sub = A.get m.subs x in
let y, sub' = aux l sub in