X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fgrub2%2Fparser.y;h=859eba30479b93eeac8fa4a8c00d21d7916931d4;hp=0d02bc155aa6793134e25ee05bc607e68d68eaac;hb=a77e8d42cd7b983d9fa5746f07e66a6fe04b6a0d;hpb=5c6263a12dd7f859daa0feba8b58a0558f0ff21c

diff --git a/discover/grub2/parser.y b/discover/grub2/parser.y
index 0d02bc1..859eba3 100644
--- a/discover/grub2/parser.y
+++ b/discover/grub2/parser.y
@@ -2,6 +2,7 @@
 %pure-parser
 %lex-param { yyscan_t scanner }
 %parse-param { struct grub2_parser *parser }
+%error-verbose
 
 %{
 #include <talloc/talloc.h>
@@ -29,6 +30,7 @@ static void yyerror(struct grub2_parser *, char const *s);
 %token	TOKEN_DO		"do"
 %token	TOKEN_DONE		"done"
 %token	TOKEN_ELIF		"elif"
+%token	TOKEN_ELSE		"else"
 %token	TOKEN_ESAC		"esac"
 %token	TOKEN_FI		"fi"
 %token	TOKEN_FOR		"for"
@@ -37,6 +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"
@@ -85,11 +88,28 @@ statement: TOKEN_EOL {
 		"fi" TOKEN_EOL {
 		$$ = create_statement_if(parser, $3, $6, NULL);
 	}
+	| "if" TOKEN_DELIM statement
+		"then" TOKEN_EOL
+		statements
+		"else" TOKEN_EOL
+		statements
+		"fi" TOKEN_EOL {
+		$$ = create_statement_if(parser, $3, $6, $9);
+	}
+	| "function" TOKEN_DELIM word TOKEN_DELIM '{' statements '}' {
+		$$ = create_statement_function(parser, $3, $6);
+	}
 	| "menuentry" TOKEN_DELIM words TOKEN_DELIM
 		'{' statements '}'
 		TOKEN_EOL {
 		$$ = create_statement_menuentry(parser, $3, $6);
 	}
+	| "submenu" TOKEN_DELIM words TOKEN_DELIM
+		'{' statements '}'
+		TOKEN_EOL {
+		/* we just flatten everything */
+		$$ = create_statement_block(parser, $6);
+	}
 
 words:	word {
 		$$ = create_argv(parser);
@@ -171,6 +191,17 @@ 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)
 {
@@ -220,3 +251,30 @@ void word_append(struct grub2_word *w1, struct grub2_word *w2)
 	w1->last->next = w2;
 	w1->last = w2;
 }
+
+struct grub2_parser *grub2_parser_create(struct discover_context *ctx)
+{
+	struct grub2_parser *parser;
+
+	parser = talloc(ctx, struct grub2_parser);
+	yylex_init_extra(parser, &parser->scanner);
+	parser->script = create_script(parser, ctx);
+
+	return parser;
+}
+
+void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len)
+{
+	YY_BUFFER_STATE bufstate;
+	int rc;
+
+	bufstate = yy_scan_bytes(buf, len - 1, parser->scanner);
+
+	rc = yyparse(parser);
+
+	yy_delete_buffer(bufstate, parser->scanner);
+
+	if (!rc)
+		script_execute(parser->script);
+}
+