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Fix bug in mono-buffer.fun introduced by 8d5681c #36

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Fix bug in mono-buffer.fun introduced by 8d5681c #36

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8 changes: 4 additions & 4 deletions Code/2018/001/mono-buffer.fun
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Original file line number Diff line number Diff line change
Expand Up @@ -95,12 +95,12 @@ functor MonoBufferFn (
(* ensure that the content array has space for amt elements *)
fun ensureCapacity (content, len, amt) = let
val curCap = A.length(!content)
val amt = Int.max(curCap - len + curCap, amt)
val capacity = (len + amt) handle Overflow => maxLen
val ensCap = (len + amt) handle Overflow => maxLen
in
if (curCap < capacity)
if (curCap < ensCap)
then let
val newArr = A.array(capacity, defaultElem)
val newCap = Int.max(2 * curCap handle Overflow => maxLen, ensCap)
val newArr = A.array(newCap, defaultElem)
in
AS.copy{dst = newArr, di = 0, src = AS.slice(!content, 0, SOME len)};
content := newArr
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