diff options
| -rw-r--r-- | src/document.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/document.c b/src/document.c index 3ab7c22..f2ce139 100644 --- a/src/document.c +++ b/src/document.c @@ -2671,13 +2671,22 @@ is_ref(const uint8_t *data, size_t beg, size_t end, size_t *last, struct link_re static void expand_tabs(hoedown_buffer *ob, const uint8_t *line, size_t size) { + /* This code makes two assumptions: + * - Input is valid UTF-8. (Any byte with top two bits 10 is skipped, + * whether or not it is a valid UTF-8 continuation byte.) + * - Input contains no combining characters. (Combining characters + * should be skipped but are not.) + */ size_t i = 0, tab = 0; while (i < size) { size_t org = i; while (i < size && line[i] != '\t') { - i++; tab++; + i++; + /* ignore UTF-8 continuation bytes */ + if ((line[i] & 0xc0) != 0x80) + tab++; } if (i > org) |