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itree.[ch]: Add sanity checks, comments, and minor tweaks

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* src/alloc.c (mark_overlay): Add sanity check.

* src/buffer.c (next_overlay_change, previous_overlay_change):
Tweak code to keep the same vars for the bounds.

* src/itree.c (interval_tree_clear, interval_tree_insert)
(interval_tree_remove, interval_tree_insert_fix, interval_tree_remove_fix):
Adjust to the `color` -> `red` change.
(interval_tree_clear): Prefer `true/false` for booleans.
(interval_generator_create): Use an actual `interval_tree_order` value
rather than 0.
(interval_generator_next): Simplify a tiny bit.  Add comment.
(interval_generator_narrow): Add sanity check.

* src/itree.h (struct interval_node): Replace `color` field with
boolean `red` field.
(enum interval_tree_order): Remove unused `ITREE_DEFLT_ORDER` value.

* src/pdumper.c (dump_interval_node): Adjust to the
`color` -> `red` change.
This commit is contained in:
Stefan Monnier 2022-09-28 19:05:16 -04:00
parent 800ecd4767
commit ea8daec9bb
5 changed files with 89 additions and 61 deletions
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3
src/alloc.c
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@ -6505,6 +6505,9 @@ mark_char_table (struct Lisp_Vector *ptr, enum pvec_type pvectype)
static void
mark_overlay (struct Lisp_Overlay *ov)
{
/* We don't mark the `interval_node` object, because it is managed manually
rather than by the GC. */
eassert (BASE_EQ (ov->interval->data, make_lisp_ptr (ov, Lisp_Vectorlike)));
set_vectorlike_marked (&ov->header);
mark_object (ov->plist);
}