BLI_string_utf8: add buffer size arg to BLI_str_utf8_from_unicode

Besides helping to avoid buffer overflow errors this reduces complexity
of BLI_str_utf32_as_utf8 which needed a special loop for the last 6
characters to avoid writing past the buffer bounds.

Also add BLI_str_utf8_from_unicode_len which only returns the length.

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/editors/space_text/text_ops.c b/source/blender/editors/space_text/text_ops.c
index b7185766224..c3bc474b98a 100644
--- a/source/blender/editors/space_text/text_ops.c
+++ b/source/blender/editors/space_text/text_ops.c
@@ -3486,7 +3486,7 @@ static int text_insert_invoke(bContext *C, wmOperator *op, const wmEvent *event)
     }
     else {
       /* in theory, ghost can set value to extended ascii here */
-      len = BLI_str_utf8_from_unicode(event->ascii, str);
+      len = BLI_str_utf8_from_unicode(event->ascii, str, sizeof(str) - 1);
     }
     str[len] = '\0';
     RNA_string_set(op->ptr, "text", str);