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wip fixes

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This commit is contained in:
carm 2015-02-11 11:09:19 -05:00
parent 472aaa83a2
commit 8fec7b005e
1 changed files with 18 additions and 28 deletions
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46
src/data/CCBufferIO.ml
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@ -40,7 +40,7 @@ let copy b =
{ b with buf=Array.copy b.buf; }
let capacity b = b.size
let capacity b = Array.length b.buf
let length b =
if b.stop >= b.start
@ -65,34 +65,20 @@ let resize b cap elem =
end
in
b.buf <- buf';
b.start <- 0;
b.stop <- len;
()
let blit_from b from_buf o len =
if (Array.length from_buf) = 0 then () else
let cap = capacity b - length b in
(* resize if needed, with a constant to amortize *)
if (Array.length from_buf) = 0 then () else
if cap < len then
resize b (Array.length b.buf + len + 24) from_buf.(0);
assert (capacity b - length b >= len);
if b.stop >= b.start
then (* [_______ start xxxxxxxxx stop ______] *)
let len_end = Array.length b.buf - b.stop in
if len_end >= len
then (Array.blit from_buf o b.buf b.stop len;
b.stop <- b.stop + len)
else (Array.blit from_buf o b.buf b.stop len_end;
Array.blit from_buf (o+len_end) b.buf 0 (len-len_end);
b.stop <- len-len_end)
else begin (* [xxxxx stop ____________ start xxxxxx] *)
let len_middle = b.start - b.stop in
assert (len_middle >= len);
Array.blit from_buf 0 b.buf b.stop len;
b.stop <- b.stop + len
end;
()
if capacity b < b.size then
resize b b.size from_buf.(0);
let sub = Array.sub from_buf o len in
let iter i x =
b.start <- i mod capacity b;
Array.set b.buf x b.start in
Array.iteri iter sub
let blit_into b to_buf o len =
if o+len > Array.length to_buf
then raise (Invalid_argument "BufferIO.blit_into");
@ -128,9 +114,7 @@ let clear b =
let reset b =
clear b;
if capacity b > 64
then b.buf <- Array.sub b.buf 0 64;
()
b.buf <- Array.of_list []
let is_empty b = b.start = b.stop
@ -199,4 +183,10 @@ let get b i =
else b.buf.(i - len_end)
let to_list b =
Array.to_list (Array.sub b.buf b.start b.stop)
if (b.stop >= b.start)
then Array.to_list (Array.sub b.buf b.start b.stop)
else List.append
(Array.to_list (Array.sub b.buf b.start (Array.length b.buf)))
(Array.to_list (Array.sub b.buf 0 b.stop))