more macros

ast.c

@@ -9,6 +9,32 @@
 
 #define N 1024
 
+void astNodeListEnsureCapacity(AstNodeList* list, uint32_t additional)
+{
+    const uint32_t new_len = list->len + additional;
+    if (new_len <= list->cap) {
+        return;
+    }
+
+    const uint32_t new_cap = new_len > list->cap * 2 ? new_len : list->cap * 2;
+    list->tags = realloc(list->tags, new_cap * sizeof(AstNodeTag));
+    list->main_tokens = realloc(list->main_tokens, new_cap * sizeof(AstTokenIndex));
+    list->datas = realloc(list->datas, new_cap * sizeof(AstData));
+    if (!list->tags || !list->main_tokens || !list->datas)
+        exit(1);
+    list->cap = new_cap;
+}
+
+void astNodeListAppend(AstNodeList* list, AstNodeTag tag,
+    AstTokenIndex main_token, AstData data)
+{
+    astNodeListEnsureCapacity(list, 1);
+    list->tags[list->len] = tag;
+    list->main_tokens[list->len] = main_token;
+    list->datas[list->len] = data;
+    list->len++;
+}
+
 Ast astParse(const char* source, const uint32_t len)
 {
     uint32_t estimated_token_count = len / 8;