X-Git-Url: https://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fgrub2%2Fgrub2.h;h=c7f43de252e9623732e699005df535bf0327f583;hp=f2a780d385510317479085e4d29c092e82c28d20;hb=d39ae394911f945cd4a7789a8b210a5662852c46;hpb=0ac0cc8dbd8c3687880f3115ae41f9903e9f2333

diff --git a/discover/grub2/grub2.h b/discover/grub2/grub2.h
index f2a780d..c7f43de 100644
--- a/discover/grub2/grub2.h
+++ b/discover/grub2/grub2.h
@@ -1,10 +1,178 @@
 #ifndef GRUB2_H
 #define GRUB2_H
 
+#include <discover/device-handler.h>
+
+#include <stdbool.h>
+#include <list/list.h>
+
+struct grub2_script;
+
+struct grub2_word {
+	enum {
+		GRUB2_WORD_TEXT,
+		GRUB2_WORD_VAR,
+	} type;
+	union {
+		char		*text;
+		const char	*name;
+	};
+	bool			split;
+	struct grub2_word	*next;
+	struct grub2_word	*last;
+	struct list_item	argv_list;
+};
+
+struct grub2_argv {
+	struct list		words;
+
+	/* postprocessing (with process_expansions) populates these to hand to
+	 * the grub2_command callbacks */
+	char			**argv;
+	int			argc;
+};
+
+struct grub2_statements {
+	struct list		list;
+};
+
+struct grub2_statement {
+	struct list_item	list;
+	enum {
+		STMT_TYPE_SIMPLE,
+		STMT_TYPE_MENUENTRY,
+		STMT_TYPE_IF,
+		STMT_TYPE_BLOCK,
+		STMT_TYPE_CONDITIONAL,
+	} type;
+	int			(*exec)(struct grub2_script *,
+					struct grub2_statement *);
+};
+
+struct grub2_statement_simple {
+	struct grub2_statement	st;
+	struct grub2_argv	*argv;
+};
+
+struct grub2_statement_menuentry {
+	struct grub2_statement	st;
+	struct grub2_argv	*argv;
+	struct grub2_statements	*statements;
+};
+
+struct grub2_statement_conditional {
+	struct grub2_statement	st;
+	struct grub2_statement	*condition;
+	struct grub2_statements	*statements;
+};
+
+struct grub2_statement_if {
+	struct grub2_statement	st;
+	struct grub2_statements	*conditionals;
+	struct grub2_statements	*else_case;
+};
+
+struct grub2_statement_block {
+	struct grub2_statement	st;
+	struct grub2_statements	*statements;
+};
+
+struct grub2_statement_function {
+	struct grub2_statement	st;
+	struct grub2_word	*name;
+	struct grub2_statements	*body;
+};
+
+struct grub2_script {
+	struct grub2_statements		*statements;
+	struct list			environment;
+	struct list			symtab;
+	struct discover_context		*ctx;
+	struct discover_boot_option	*opt;
+};
+
 struct grub2_parser {
-	void	*scanner;
+	void			*scanner;
+	struct grub2_script	*script;
 };
 
+/* 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_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_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);
+
+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(void *ctx,
+		struct discover_device *orig_device,
+		const char *root, const char *path);
+
+bool resolve_grub2_resource(struct device_handler *handler,
+		struct resource *res);
 
+/* external parser api */
+struct grub2_parser *grub2_parser_create(struct discover_context *ctx);
+void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len);
 #endif /* GRUB2_H */