init basic

ccompiler/frontend/parser/ast/program.c

@@ -0,0 +1,29 @@
+#include "../parser.h"
+#include "ast.h"
+
+#ifndef PROG_MAX_NODE_SIZE
+#define PROG_MAX_NODE_SIZE (1024 * 4)
+#endif
+
+void parse_prog(struct Parser* parser) {
+    /**
+     * Program := (Declaration | Definition)*
+     * same as
+     * Program := Declaration* Definition*
+     */
+    int child_size = 0;
+    parser->root = new_ast_node();
+    struct ASTNode* node;
+    parser->root->root.children = xmalloc(sizeof(struct ASTNode*) * PROG_MAX_NODE_SIZE);
+    while (1) {
+        flushpeektok(parser);
+        if (peektoktype(parser) == TOKEN_EOF) {
+            break;
+        }
+        node = parse_decl(parser);
+        parser->root->root.children[child_size++] = node;
+    }
+    parser->root->type = NT_ROOT;
+    parser->root->root.child_size = child_size;
+    return;
+}