Moved cmark_free_inlines from inlines to ast.

1 files changed, 52 insertions, 1 deletions

diff --git a/src/ast.c b/src/ast.c
index 8ccf184..2a9ca8f 100644
--- a/src/ast.c
+++ b/src/ast.c
@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include "buffer.h"
 #include "ast.h"
-#include "inlines.h"
 #include "references.h"
 
 // Free a node_block list and any children.
@@ -28,3 +27,55 @@ void cmark_free_blocks(node_block *e)
 	}
 }
 
+// Utility function used by free_inlines
+static void splice_into_list(node_inl* e, node_inl* children) {
+	node_inl * tmp;
+	if (children) {
+		tmp = children;
+		// Find last child
+		while (tmp->next) {
+			tmp = tmp->next;
+		}
+		// Splice children into list
+		tmp->next = e->next;
+		e->next = children;
+	}
+	return ;
+}
+
+// Free an inline list.  Avoid recursion to prevent stack overflows
+// on deeply nested structures.
+extern void free_inlines(node_inl* e)
+{
+	node_inl * next;
+
+	while (e != NULL) {
+		switch (e->tag){
+		case INL_STRING:
+		case INL_RAW_HTML:
+		case INL_CODE:
+			chunk_free(&e->content.literal);
+			break;
+		case INL_LINEBREAK:
+		case INL_SOFTBREAK:
+			break;
+		case INL_LINK:
+		case INL_IMAGE:
+			free(e->content.linkable.url);
+			free(e->content.linkable.title);
+			splice_into_list(e, e->content.linkable.label);
+			break;
+		case INL_EMPH:
+		case INL_STRONG:
+		        splice_into_list(e, e->content.inlines);
+			break;
+		default:
+		        fprintf(stderr, "[WARN] (%s:%d) Unknown inline tag %d",
+				__FILE__, __LINE__, e->tag);
+			break;
+		}
+		next = e->next;
+		free(e);
+		e = next;
+	}
+}