+/* type for builtin functions */
+typedef int (*grub2_function)(struct grub2_script *script, void *data,
+ int argc, char *argv[]);
+
+struct grub2_statements *create_statements(struct grub2_parser *parser);
+
+struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
+ struct grub2_argv *argv);
+
+struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
+ struct grub2_argv *argv, struct grub2_statements *stmts);
+
+struct grub2_statement *create_statement_conditional(
+ struct grub2_parser *parser, struct grub2_statement *condition,
+ struct grub2_statements *statements);
+
+struct grub2_statement *create_statement_if(struct grub2_parser *parser,
+ struct grub2_statement *conditional,
+ struct grub2_statements *elifs,
+ struct grub2_statements *else_case);
+
+struct grub2_statement *create_statement_block(struct grub2_parser *parser,
+ struct grub2_statements *stmts);
+
+struct grub2_statement *create_statement_function(struct grub2_parser *parser,
+ struct grub2_word *name, struct grub2_statements *body);
+
+struct grub2_statement *create_statement_for(struct grub2_parser *parser,
+ struct grub2_word *var, struct grub2_argv *list,
+ struct grub2_statements *body);
+
+struct grub2_word *create_word_text(struct grub2_parser *parser,
+ const char *text);
+
+struct grub2_word *create_word_var(struct grub2_parser *parser,
+ const char *name, bool split);
+
+struct grub2_argv *create_argv(struct grub2_parser *parser);
+
+void statement_append(struct grub2_statements *stmts,
+ struct grub2_statement *stmt);
+
+void argv_append(struct grub2_argv *argv, struct grub2_word *word);
+
+void word_append(struct grub2_word *w1, struct grub2_word *w2);
+
+/* script interface */
+void script_execute(struct grub2_script *script);
+
+int statement_simple_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
+int statement_block_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
+int statement_if_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
+int statement_menuentry_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
+int statement_function_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
+int statement_for_execute(struct grub2_script *script,
+ struct grub2_statement *statement);
+
+struct grub2_script *create_script(struct grub2_parser *parser,
+ struct discover_context *ctx);
+
+const char *script_env_get(struct grub2_script *script, const char *name);
+
+void script_env_set(struct grub2_script *script,
+ const char *name, const char *value);
+
+void script_register_function(struct grub2_script *script,
+ const char *name, grub2_function fn, void *data);
+
+void register_builtins(struct grub2_script *script);
+
+/* resources */
+struct resource *create_grub2_resource(struct discover_boot_option *opt,
+ struct discover_device *orig_device,
+ const char *root, const char *path);
+
+bool resolve_grub2_resource(struct device_handler *handler,
+ struct resource *res);