[PATCH v3 1/4] srcpos: Define srcpos_free

srcpos can be chained together using srcpos_extend. However, in such
cases, we need to free all the chained nodes.

srcpos_free is a helper to recursively free all the linked srcpos.

Signed-off-by: Ayush Singh <[email protected]>
---
 livetree.c |  2 +-
 srcpos.c   | 11 +++++++++++
 srcpos.h   |  1 +
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/livetree.c b/livetree.c
index 93c77d95a320ec05aa355e12920cef9e1c91c26a..d51d05830b181476ddbab878ef8b556230b58e2b 100644
--- a/livetree.c
+++ b/livetree.c
@@ -174,7 +174,7 @@ struct node *merge_nodes(struct node *old_node, struct node *new_node)
 
 				old_prop->val = new_prop->val;
 				old_prop->deleted = 0;
-				free(old_prop->srcpos);
+				srcpos_free(old_prop->srcpos);
 				old_prop->srcpos = new_prop->srcpos;
 				free(new_prop);
 				new_prop = NULL;
diff --git a/srcpos.c b/srcpos.c
index 5e2f7dd299184ff86b00b280dc31498cb9830e28..5bb57bf6856c6ff6b8eb993aff5d216c63bf5ecb 100644
--- a/srcpos.c
+++ b/srcpos.c
@@ -287,6 +287,17 @@ struct srcpos *srcpos_extend(struct srcpos *pos, struct srcpos *newtail)
 	return pos;
 }
 
+void srcpos_free(struct srcpos *pos)
+{
+	struct srcpos *p_next;
+
+	while (pos) {
+		p_next = pos->next;
+		free(pos);
+		pos = p_next;
+	}
+}
+
 char *
 srcpos_string(struct srcpos *pos)
 {
diff --git a/srcpos.h b/srcpos.h
index 4318d7ad34d91d2ada1a5d7f92d2c84148fec366..4d60b50e31197c2da6a7fa8851c5e5a6717d78a6 100644
--- a/srcpos.h
+++ b/srcpos.h
@@ -88,6 +88,7 @@ extern void srcpos_update(struct srcpos *pos, const char *text, int len);
 extern struct srcpos *srcpos_copy(struct srcpos *pos);
 extern struct srcpos *srcpos_extend(struct srcpos *new_srcpos,
 				    struct srcpos *old_srcpos);
+extern void srcpos_free(struct srcpos *pos);
 extern char *srcpos_string(struct srcpos *pos);
 extern char *srcpos_string_first(struct srcpos *pos, int level);
 extern char *srcpos_string_last(struct srcpos *pos, int level);

-- 
2.49.0