Add hash map

1 files changed, 4 insertions, 3 deletions

diff --git a/src/std/buffer.c b/src/std/buffer.c
index 1fdcfd4..e631153 100644
--- a/src/std/buffer.c
+++ b/src/std/buffer.c
@@ -39,9 +39,10 @@ static CHECK_RESULT int buffer_ensure_capacity(Buffer *self, usize new_capacity)
     return BUFFER_OK;
 }
 
-int buffer_append(Buffer *self, void *data, usize size) {
+int buffer_append(Buffer *self, const void *data, usize size) {
     return_if_error(buffer_ensure_capacity(self, self->size + size));
-    am_memcpy(self->data + self->size, data, size);
+    if(data)
+        am_memcpy(self->data + self->size, data, size);
     self->size += size;
     return BUFFER_OK; 
 }
@@ -72,4 +73,4 @@ void *buffer_end(Buffer *self) {
 usize __buffer_get_size(Buffer *self, usize type_size) {
     assert(type_size != 0);
     return self->size / type_size;
-}
\ No newline at end of file
+}