Use C string instead of chunk for literal text

Use zero-terminated C strings and a separate length field instead of
cmark_chunks. Literal inline text will now be copied from the parent
block's content buffer, slowing the benchmark down by 10-15%.

The node struct never references memory of other nodes now, fixing #309.
Node accessors don't have to check for delayed creation of C strings,
so parsing and iterating all literals using the public API should
actually be faster than before.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/iterator.c b/src/iterator.c
index f5cd802..cd7db8e 100644
--- a/src/iterator.c
+++ b/src/iterator.c
@@ -111,8 +111,9 @@ void cmark_consolidate_text_nodes(cmark_node *root) {
         cmark_node_free(tmp);
         tmp = next;
       }
-      cmark_chunk_free(iter->mem, &cur->as.literal);
-      cur->as.literal = cmark_chunk_buf_detach(&buf);
+      iter->mem->free(cur->as.literal.data);
+      cur->as.literal.len = buf.size;
+      cur->as.literal.data = cmark_strbuf_detach(&buf);
     }
   }