// Parse backtick code section or raw backticks, return an inline.
// Assumes that the subject has a backtick at the current position.
static cmark_node* handle_backticks(subject *subj)
{
cmark_chunk openticks = take_while(subj, isbacktick);
int startpos = subj->pos;
int endpos = scan_to_closing_backticks(subj, openticks.len);
if (endpos == 0) { // not found
subj->pos = startpos; // rewind
return make_str(openticks);
} else {
cmark_strbuf buf = GH_BUF_INIT;
cmark_strbuf_set(&buf, subj->input.data + startpos, endpos - startpos - openticks.len);
cmark_strbuf_trim(&buf);
cmark_strbuf_normalize_whitespace(&buf);
return make_code(cmark_chunk_buf_detach(&buf));
}
}
// normalize reference: collapse internal whitespace to single space,
// remove leading/trailing whitespace, case fold
// Return NULL if the reference name is actually empty (i.e. composed
// solely from whitespace)
static unsigned char *normalize_reference(cmark_mem *mem, cmark_chunk *ref) {
cmark_strbuf normalized = CMARK_BUF_INIT(mem);
unsigned char *result;
if (ref == NULL)
return NULL;
if (ref->len == 0)
return NULL;
cmark_utf8proc_case_fold(&normalized, ref->data, ref->len);
cmark_strbuf_trim(&normalized);
cmark_strbuf_normalize_whitespace(&normalized);
result = cmark_strbuf_detach(&normalized);
assert(result);
if (result[0] == '\0') {
free(result);
return NULL;
}
return result;
}
