kconfig: refactor scanning and parsing "option" properties

For the keywords "modules", "defconfig_list", and "allnoconfig_y",
the lexer should pass specific tokens instead of generic T_WORD.

This simplifies both the lexer and the parser.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

scripts/kconfig/kconf_id.c

@@ -30,9 +30,6 @@ static struct kconf_id kconf_id_array[] = {
 	{ "visible",		T_VISIBLE,		TF_COMMAND },
 	{ "option",		T_OPTION,		TF_COMMAND },
 	{ "on",			T_ON,			TF_PARAM },
-	{ "modules",		T_OPT_MODULES,		TF_OPTION },
-	{ "defconfig_list",	T_OPT_DEFCONFIG_LIST,	TF_OPTION },
-	{ "allnoconfig_y",	T_OPT_ALLNOCONFIG_Y,	TF_OPTION },
 };
 
 #define KCONF_ID_ARRAY_SIZE (sizeof(kconf_id_array)/sizeof(struct kconf_id))

scripts/kconfig/lkc.h

@@ -32,7 +32,6 @@ static inline const char *CONFIG_prefix(void)
 
 #define TF_COMMAND	0x0001
 #define TF_PARAM	0x0002
-#define TF_OPTION	0x0004
 
 enum conf_def_mode {
 	def_default,
@@ -42,10 +41,6 @@ enum conf_def_mode {
 	def_random
 };
 
-#define T_OPT_MODULES		1
-#define T_OPT_DEFCONFIG_LIST	2
-#define T_OPT_ALLNOCONFIG_Y	4
-
 struct kconf_id {
 	const char *name;
 	int token;
@@ -90,7 +85,9 @@ void menu_add_visibility(struct expr *dep);
 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep);
 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep);
-void menu_add_option(int token, char *arg);
+void menu_add_option_modules(void);
+void menu_add_option_defconfig_list(void);
+void menu_add_option_allnoconfig_y(void);
 void menu_finalize(struct menu *parent);
 void menu_set_type(int type);
 

scripts/kconfig/menu.c

@@ -195,29 +195,26 @@ void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 }
 
-void menu_add_option(int token, char *arg)
-{
-	switch (token) {
-	case T_OPT_MODULES:
-		if (modules_sym)
-			zconf_error("symbol '%s' redefines option 'modules'"
-				    " already defined by symbol '%s'",
-				    current_entry->sym->name,
-				    modules_sym->name
-				    );
-		modules_sym = current_entry->sym;
-		break;
-	case T_OPT_DEFCONFIG_LIST:
-		if (!sym_defconfig_list)
-			sym_defconfig_list = current_entry->sym;
-		else if (sym_defconfig_list != current_entry->sym)
-			zconf_error("trying to redefine defconfig symbol");
-		sym_defconfig_list->flags |= SYMBOL_NO_WRITE;
-		break;
-	case T_OPT_ALLNOCONFIG_Y:
-		current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
-		break;
-	}
+void menu_add_option_modules(void)
+{
+	if (modules_sym)
+		zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
+			    current_entry->sym->name, modules_sym->name);
+	modules_sym = current_entry->sym;
+}
+
+void menu_add_option_defconfig_list(void)
+{
+	if (!sym_defconfig_list)
+		sym_defconfig_list = current_entry->sym;
+	else if (sym_defconfig_list != current_entry->sym)
+		zconf_error("trying to redefine defconfig symbol");
+	sym_defconfig_list->flags |= SYMBOL_NO_WRITE;
+}
+
+void menu_add_option_allnoconfig_y(void)
+{
+	current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
 }
 
 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)

scripts/kconfig/zconf.l

@@ -140,6 +140,9 @@ n	[A-Za-z0-9_-]
 }
 
 <PARAM>{
+	"modules"		return T_MODULES;
+	"defconfig_list"	return T_DEFCONFIG_LIST;
+	"allnoconfig_y"		return T_ALLNOCONFIG_Y;
 	"&&"	return T_AND;
 	"||"	return T_OR;
 	"("	return T_OPEN_PAREN;

scripts/kconfig/zconf.y

@@ -64,18 +64,21 @@ static struct menu *current_menu, *current_entry;
 %token <id>T_IMPLY
 %token <id>T_RANGE
 %token <id>T_VISIBLE
-%token <id>T_OPTION
 %token <id>T_ON
 %token <string> T_WORD
 %token <string> T_WORD_QUOTE
+%token T_ALLNOCONFIG_Y
 %token T_BOOL
 %token T_CLOSE_PAREN
 %token T_DEFAULT
+%token T_DEFCONFIG_LIST
 %token T_DEF_BOOL
 %token T_DEF_TRISTATE
 %token T_HEX
 %token T_INT
+%token T_MODULES
 %token T_OPEN_PAREN
+%token T_OPTION
 %token T_STRING
 %token T_TRISTATE
 %token T_EOL
@@ -97,7 +100,7 @@ static struct menu *current_menu, *current_entry;
 %type <expr> if_expr
 %type <id> end
 %type <menu> if_entry menu_entry choice_entry
-%type <string> symbol_option_arg word_opt assign_val
+%type <string> word_opt assign_val
 
 %destructor {
 	fprintf(stderr, "%s:%d: missing end statement for this entry\n",
@@ -172,7 +175,6 @@ menuconfig_stmt: menuconfig_entry_start config_option_list
 config_option_list:
 	  /* empty */
 	| config_option_list config_option
-	| config_option_list symbol_option
 	| config_option_list depends
 	| config_option_list help
 ;
@@ -219,27 +221,20 @@ config_option: T_RANGE symbol symbol if_expr T_EOL
 	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 };
 
-symbol_option: T_OPTION symbol_option_list T_EOL
-;
+config_option: T_OPTION T_MODULES T_EOL
+{
+	menu_add_option_modules();
+};
 
-symbol_option_list:
-	  /* empty */
-	| symbol_option_list T_WORD symbol_option_arg
+config_option: T_OPTION T_DEFCONFIG_LIST T_EOL
 {
-	const struct kconf_id *id = kconf_id_lookup($2, strlen($2));
-	if (id && id->flags & TF_OPTION) {
-		menu_add_option(id->token, $3);
-		free($3);
-	}
-	else
-		zconfprint("warning: ignoring unknown option %s", $2);
-	free($2);
+	menu_add_option_defconfig_list();
 };
 
-symbol_option_arg:
-	  /* empty */		{ $$ = NULL; }
-	| T_EQUAL prompt	{ $$ = $2; }
-;
+config_option: T_OPTION T_ALLNOCONFIG_Y T_EOL
+{
+	menu_add_option_allnoconfig_y();
+};
 
 /* choice entry */