discover/grub2: Implement statement blocks
[petitboot] / discover / grub2 / parser.y
index dbdde51fe57fbc7377de1c7132f97d831aeee4e6..d57c732a8382152c690fbabad381b5b266c0f509 100644 (file)
@@ -14,11 +14,10 @@ static void yyerror(struct grub2_parser *, char const *s);
 %}
 
 %union {
-       struct {
-               char    *strval;
-               int     expand;
-               int     split;
-       };
+       struct grub2_word       *word;
+       struct grub2_argv       *argv;
+       struct grub2_statement  *statement;
+       struct grub2_statements *statements;
 }
 
 /* reserved words */
@@ -41,42 +40,68 @@ static void yyerror(struct grub2_parser *, char const *s);
 %token TOKEN_UTIL              "until"
 %token TOKEN_WHILE             "while"
 
+%type <statement>      statement
+%type <statements>     statements
+%type <argv>           words
+%type <word>           word
+
 /* syntax */
 %token TOKEN_EOL
 %token TOKEN_DELIM
-%token TOKEN_WORD
+%token <word> TOKEN_WORD
 
 %start script
 %debug
 
 %%
 
-script: statements
-       ;
+script: statements {
+               parser->statements = $1;
+       }
 
-statements: statement
-       | statements statement
-       ;
+statements: statement {
+               $$ = create_statements(parser);
+               statement_append($$, $1);
+       }
+       | statements statement {
+               statement_append($1, $2);
+       }
 
-statement: TOKEN_EOL
-       | words TOKEN_EOL
-       | '{' statements '}'
+statement: TOKEN_EOL {
+               $$ = NULL;
+       }
+       | words TOKEN_EOL {
+                  $$ = create_statement_simple(parser, $1);
+       }
+       | '{' statements '}' {
+               $$ = create_statement_block(parser, $2);
+       }
        | "if" TOKEN_DELIM statement
                "then" TOKEN_EOL
                statements
-               "fi" TOKEN_EOL
+               "fi" TOKEN_EOL {
+               $$ = create_statement_if(parser, $3, $6, NULL);
+       }
        | "menuentry" TOKEN_DELIM words TOKEN_DELIM
                '{' statements '}'
-               TOKEN_EOL
-       ;
+               TOKEN_EOL {
+               $$ = create_statement_menuentry(parser, $3, $6);
+       }
 
-words: | word
-       | words TOKEN_DELIM word
-       ;
+words: word {
+               $$ = create_argv(parser);
+               argv_append($$, $1);
+       }
+       | words TOKEN_DELIM word {
+               argv_append($1, $3);
+               $$ = $1;
+       }
 
 word:  TOKEN_WORD
-       | word TOKEN_WORD
-       ;
+       | word TOKEN_WORD {
+               word_append($1, $2);
+               $$ = $1;
+       }
 
 %%
 void yyerror(struct grub2_parser *parser, char const *s)