API improvements: cmark_event_type parameter for walk handlers.

Added cmark_event_type enum, which is used as the second
parameter of the handler passed to cmark_walk.

See #224.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/cmark.h b/src/cmark.h
index 224ef3a..a43703a 100644
--- a/src/cmark.h
+++ b/src/cmark.h
@@ -85,7 +85,14 @@ typedef enum {
 typedef struct cmark_node cmark_node;
 typedef struct cmark_parser cmark_parser;
 
-typedef int (*cmark_node_handler)(cmark_node*, int, void*);
+typedef enum {
+	CMARK_EVENT_DONE,
+	CMARK_EVENT_ENTER,
+	CMARK_EVENT_EXIT
+} cmark_event_type;
+
+typedef int (*cmark_node_handler)(cmark_node *node, cmark_event_type ev_type,
+				  void *state);
 
 /**
  * .SH CREATING AND DESTROYING NODES
@@ -311,7 +318,7 @@ char *cmark_render_html(cmark_node *root);
 /** Walks the tree starting from root, applying handler to each node.
  * Nodes that can have children are visited twice, once on the way in
  * and once on the way out.  handler is a function that takes a node
- * pointer, an integer direction (1 for entering, 0 for leaving),
+ * pointer, a cmark_event_type,
  * and a pointer to a state structure that can be consulted and
  * updated by the handler.  The handler should return 1 on success,
  * 0 on failure.  cmark_walk returns 1 if it traversed the entire