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-rw-r--r--src/inlines.c25
1 files changed, 22 insertions, 3 deletions
diff --git a/src/inlines.c b/src/inlines.c
index 2fe0caa..1ab1b29 100644
--- a/src/inlines.c
+++ b/src/inlines.c
@@ -121,10 +121,29 @@ inline static node_inl* make_simple(int t)
#define make_emph(contents) make_inlines(INL_EMPH, contents)
#define make_strong(contents) make_inlines(INL_STRONG, contents)
-// Free an inline list.
+// Utility function used by free_inlines
+void splice_into_list(node_inl* e, node_inl* children) {
+ node_inl * tmp;
+ tmp = children;
+ if (!tmp) {
+ return ;
+ }
+ // 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:
@@ -139,11 +158,11 @@ extern void free_inlines(node_inl* e)
case INL_IMAGE:
free(e->content.linkable.url);
free(e->content.linkable.title);
- free_inlines(e->content.linkable.label);
+ splice_into_list(e, e->content.linkable.label);
break;
case INL_EMPH:
case INL_STRONG:
- free_inlines(e->content.inlines);
+ splice_into_list(e, e->content.inlines);
break;
default:
break;