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csi: refactor CHT/CBT

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Eliminate the outer loop, so that when moving the cursor multiple
tab stops, we no longer iterate the tab stop list all over again.

This also fixes a DoS flaw when passing a very large value as
CHT/CBT argument, which may hang the terminal.

Closes #2360
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CismonX 2026-05-25 06:31:04 +08:00
parent 4bf60d0fbc
commit 814b7e1a48
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2 changed files with 24 additions and 18 deletions
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CHANGELOG.md
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@ -82,10 +82,13 @@
* DECCRA not clamping or verifying the destination rectangle
([#2352][2352]).
* Empty selection clearing the clipboard ([#2327][2327]).
* Passing a very large value as CHT/CBT argument hangs the terminal
([#2360][2360]).
[2353]: https://codeberg.org/dnkl/foot/issues/2353
[2352]: https://codeberg.org/dnkl/foot/issues/2352
[2327]: https://codeberg.org/dnkl/foot/issues/2327
[2360]: https://codeberg.org/dnkl/foot/issues/2360
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