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ui: fix problem with sattr_T overflow

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sattr_T was defined as uint16_t. But this is not enough to handle the
24-bit colors of the terminal. To solve this problem, change it to int.
In 32bit, int may overflow. So, if it overflows, change it to ignore it
without adding more attr_entries.

fixes #12366
This commit is contained in:
erw7 2020-08-01 01:52:15 +09:00
parent 1153ac9036
commit 872ecf65d1
2 changed files with 7 additions and 2 deletions
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2
src/nvim/grid_defs.h
View File

@ -11,7 +11,7 @@
// The characters and attributes drawn on grids.
typedef char_u schar_T[(MAX_MCO+1) * 4 + 1];
typedef int16_t sattr_T;
typedef int sattr_T;
/// ScreenGrid represents a resizable rectuangular grid displayed by UI clients.
///

7
src/nvim/highlight.c
View File

@ -90,7 +90,12 @@ static int get_attr_entry(HlEntry entry)
}
}
id = (int)kv_size(attr_entries);
size_t next_id = kv_size(attr_entries);
if (next_id > INT_MAX) {
ELOG("The index on attr_entries has overflowed");
return 0;
}
id = (int)next_id;
kv_push(attr_entries, entry);
map_put(HlEntry, int)(attr_entry_ids, entry, id);