X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fgrub2%2Fgrub2.h;h=4d083ae9ed18f8f8bb6cfc2d5d9582ed54a5c78e;hp=0643a7293d8aba9025e742d5c822f7ff8901d6fc;hb=a33e7992485e95a60add27af37327dc9f0eb3a34;hpb=c0b2be44ee953f9f50737b959e0def6e2df24629

diff --git a/discover/grub2/grub2.h b/discover/grub2/grub2.h
index 0643a72..4d083ae 100644
--- a/discover/grub2/grub2.h
+++ b/discover/grub2/grub2.h
@@ -1,21 +1,35 @@
 #ifndef GRUB2_H
 #define GRUB2_H
 
+#include <discover/device-handler.h>
+
 #include <stdbool.h>
 #include <list/list.h>
 
-struct grub2_parser;
+struct grub2_script;
 
 struct grub2_word {
-	const char		*text;
-	bool			expand;
+	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 {
@@ -29,7 +43,10 @@ struct grub2_statement {
 		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 {
@@ -43,11 +60,16 @@ struct grub2_statement_menuentry {
 	struct grub2_statements	*statements;
 };
 
-struct grub2_statement_if {
+struct grub2_statement_conditional {
 	struct grub2_statement	st;
 	struct grub2_statement	*condition;
-	struct grub2_statements	*true_case;
-	struct grub2_statements	*false_case;
+	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 {
@@ -55,11 +77,29 @@ struct grub2_statement_block {
 	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;
-	struct grub2_statements	*statements;
+	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,
@@ -68,16 +108,26 @@ struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
 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 *condition,
-		struct grub2_statements *true_case,
-		struct grub2_statements *false_case);
+		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_word *create_word(struct grub2_parser *parser, const char *text,
-		bool expand, bool split);
+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);
 
@@ -88,5 +138,43 @@ 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);
+
+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 */