Add list_empty and list_push

1 files changed, 20 insertions, 0 deletions

diff --git a/list/include/list.h b/list/include/list.h
index aadcb88..92f30f7 100644
--- a/list/include/list.h
+++ b/list/include/list.h
@@ -34,6 +34,9 @@ static inline void* alloc(size_t size) {
   }                                                     \
   list.head = nullptr;
 
+/// Whether the list is empty.
+#define list_empty(list) (!list.head)
+
 /// Prepend a value to the list.
 #define list_add(list, value)                               \
   {                                                         \
@@ -46,6 +49,23 @@ static inline void* alloc(size_t size) {
     list.head = node;                                       \
   }
 
+/// Append a value to the list.
+#define list_push(list, value)                              \
+  {                                                         \
+    __typeof__(list.head) node = alloc(sizeof(*list.head)); \
+    node->val                  = value;                     \
+    node->next                 = 0;                         \
+    if (!list.head) {                                       \
+      list.head = node;                                     \
+    } else {                                                \
+      __typeof__(list.head) next = list.head;               \
+      while (next && next->next) {                          \
+        next = next->next;                                  \
+      }                                                     \
+      next->next = node;                                    \
+    }                                                       \
+  }
+
 /// Delete the first occurrence of the value from the list.
 #define list_remove(list, search_value)                                   \
   for (__typeof__(list.head) iter = list.head; iter; iter = iter->next) { \