X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=discover%2Fgrub2%2Fparser.y;h=81856dfcaa5a2002fce07a78460a6e1ddb0015d6;hb=bda4feeab43ec0ef8bf2bf63d54d81ab54f3ba51;hp=550c3748df70c0ec1a3636a3f2fc0e242e19e9ef;hpb=d808f5d2ec8e232d736a5f811d647df91e2a5b43;p=petitboot

diff --git a/discover/grub2/parser.y b/discover/grub2/parser.y
index 550c374..81856df 100644
--- a/discover/grub2/parser.y
+++ b/discover/grub2/parser.y
@@ -39,6 +39,7 @@ static void yyerror(struct grub2_parser *, char const *s);
 %token	TOKEN_IN		"in"
 %token	TOKEN_MENUENTRY		"menuentry"
 %token	TOKEN_SELECT		"select"
+%token	TOKEN_SUBMENU		"submenu"
 %token	TOKEN_THEN		"then"
 %token	TOKEN_TIME		"time"
 %token	TOKEN_UTIL		"until"
@@ -46,6 +47,9 @@ static void yyerror(struct grub2_parser *, char const *s);
 
 %type <statement>	statement
 %type <statements>	statements
+%type <statement>	conditional
+%type <statement>	elif
+%type <statements>	elifs
 %type <argv>		words
 %type <word>		word
 
@@ -59,47 +63,66 @@ static void yyerror(struct grub2_parser *, char const *s);
 
 %%
 
-script: statements {
+script:	statements {
 		parser->script->statements = $1;
 	}
 
-statements: statement {
+statements: /* empty */ {
 		$$ = create_statements(parser);
-		statement_append($$, $1);
 	}
-	| statements statement {
+	| statements statement TOKEN_EOL {
 		statement_append($1, $2);
 		$$ = $1;
 	}
+	| statements TOKEN_EOL {
+		$$ = $1;
+	}
+
+conditional: statement TOKEN_EOL "then" TOKEN_EOL statements {
+		$$ = create_statement_conditional(parser, $1, $5);
+	}
 
-statement: TOKEN_EOL {
-		$$ = NULL;
+elif: "elif" TOKEN_DELIM conditional {
+		$$ = $3;
+      }
+
+elifs: /* empty */ {
+		$$ = create_statements(parser);
+	}
+	| elifs elif {
+		statement_append($1, $2);
+		$$ = $1;
 	}
-	| words TOKEN_EOL {
+
+statement:
+	words {
 		   $$ = create_statement_simple(parser, $1);
 	}
 	| '{' statements '}' {
 		$$ = create_statement_block(parser, $2);
 	}
-	| "if" TOKEN_DELIM statement
-		"then" TOKEN_EOL
-		statements
-		"fi" TOKEN_EOL {
-		$$ = create_statement_if(parser, $3, $6, NULL);
+	| "if" TOKEN_DELIM conditional elifs "fi" {
+		$$ = create_statement_if(parser, $3, $4, NULL);
 	}
-	| "if" TOKEN_DELIM statement
-		"then" TOKEN_EOL
-		statements
+	| "if" TOKEN_DELIM conditional
+		elifs
 		"else" TOKEN_EOL
 		statements
-		"fi" TOKEN_EOL {
-		$$ = create_statement_if(parser, $3, $6, $9);
+		"fi" {
+		$$ = create_statement_if(parser, $3, $4, $7);
+	}
+	| "function" TOKEN_DELIM word TOKEN_DELIM '{' statements '}' {
+		$$ = create_statement_function(parser, $3, $6);
 	}
 	| "menuentry" TOKEN_DELIM words TOKEN_DELIM
-		'{' statements '}'
-		TOKEN_EOL {
+		'{' statements '}' {
 		$$ = create_statement_menuentry(parser, $3, $6);
 	}
+	| "submenu" TOKEN_DELIM words TOKEN_DELIM
+		'{' statements '}' {
+		/* we just flatten everything */
+		$$ = create_statement_block(parser, $6);
+	}
 
 words:	word {
 		$$ = create_argv(parser);
@@ -155,18 +178,33 @@ struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
 	return &stmt->st;
 }
 
-struct grub2_statement *create_statement_if(struct grub2_parser *parser,
+struct grub2_statement *create_statement_conditional(
+		struct grub2_parser *parser,
 		struct grub2_statement *condition,
-		struct grub2_statements *true_case,
-		struct grub2_statements *false_case)
+		struct grub2_statements *statements)
+{
+	struct grub2_statement_conditional *stmt =
+		talloc(parser, struct grub2_statement_conditional);
+	stmt->st.type = STMT_TYPE_CONDITIONAL;
+	stmt->condition = condition;
+	stmt->statements = statements;
+	return &stmt->st;
+}
+
+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_if *stmt =
 		talloc(parser, struct grub2_statement_if);
+
+	list_add(&elifs->list, &conditional->list);
+
 	stmt->st.type = STMT_TYPE_IF;
 	stmt->st.exec = statement_if_execute;
-	stmt->condition = condition;
-	stmt->true_case = true_case;
-	stmt->false_case = false_case;
+	stmt->conditionals = elifs;
+	stmt->else_case = else_case;
 	return &stmt->st;
 }
 
@@ -181,6 +219,17 @@ struct grub2_statement *create_statement_block(struct grub2_parser *parser,
 	return &stmt->st;
 }
 
+struct grub2_statement *create_statement_function(struct grub2_parser *parser,
+		struct grub2_word *name, struct grub2_statements *body)
+{
+	struct grub2_statement_function *stmt =
+		talloc(parser, struct grub2_statement_function);
+	stmt->st.exec = statement_function_execute;
+	stmt->name = name;
+	stmt->body = body;
+	return &stmt->st;
+}
+
 void statement_append(struct grub2_statements *stmts,
 		struct grub2_statement *stmt)
 {