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fix bugs in 'LineGap.subRight' (we were not passing nextIdx in recursion properly)

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Humza Shahid
2025-09-30 05:23:31 +01:00
parent 14bb447289
commit 265e6e1a90
1 changed files with 24 additions and 34 deletions
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58
src/line_gap.sml
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@@ -2263,42 +2263,32 @@ struct
end
fun subRight (findIdx, curIdx, hd, tl) =
if findIdx > curIdx + String.size hd - 1 then
case tl of
hd :: tl =>
if findIdx > curIdx + String.size hd - 1 then
subRight (findIdx, curIdx + String.size hd, hd, tl)
else
let val strIdx = findIdx - curIdx
in String.sub (hd, strIdx)
end
| [] => raise Fail "not found"
else
let val strIdx = findIdx - curIdx
in String.sub (hd, strIdx)
end
let
val nextIdx = curIdx + String.size hd
in
if findIdx > nextIdx - 1 then
case tl of
hd :: tl => subRight (findIdx, nextIdx, hd, tl)
| [] => raise Fail "not found"
else
let val strIdx = findIdx - curIdx
in String.sub (hd, strIdx)
end
end
fun subLeft (findIdx, curIdx, hd, tl) =
if findIdx < curIdx - String.size hd then
case tl of
hd :: tl =>
if findIdx < curIdx - String.size hd then
subLeft (findIdx, curIdx - String.size hd, hd, tl)
else
let
val prevIdx = curIdx - String.size hd
val strIdx = findIdx - prevIdx
in
String.sub (hd, strIdx)
end
| [] => raise Fail "not found"
else
let
val prevIdx = curIdx - String.size hd
val strIdx = findIdx - prevIdx
in
String.sub (hd, strIdx)
end
let
val prevIdx = curIdx - String.size hd
in
if findIdx < prevIdx then
case tl of
hd :: tl => subLeft (findIdx, prevIdx, hd, tl)
| [] => raise Fail "not found"
else
let val strIdx = findIdx - prevIdx
in String.sub (hd, strIdx)
end
end
fun sub (findIdx, buffer: t) =
if findIdx >= #idx buffer then