[PATCH] support for 'range'

The 'range' keyword allows to define a lower and upper limit for integer
and hex symbols.

scripts/kconfig/confdata.c

@@ -224,6 +224,20 @@ int conf_read(const char *name)
 	fclose(in);
 
 	for_all_symbols(i, sym) {
+		sym_calc_value(sym);
+		if (sym_has_value(sym)) {
+			if (sym->visible == no)
+				sym->flags |= SYMBOL_NEW;
+			switch (sym->type) {
+			case S_STRING:
+			case S_INT:
+			case S_HEX:
+				if (!sym_string_within_range(sym, sym->user.val))
+					sym->flags |= SYMBOL_NEW;
+			default:
+				break;
+			}
+		}
 		if (!sym_is_choice(sym))
 			continue;
 		prop = sym_get_choice_prop(sym);

scripts/kconfig/expr.c

@@ -215,6 +215,7 @@ int expr_eq(struct expr *e1, struct expr *e2)
 		trans_count = old_count;
 		return res;
 	case E_CHOICE:
+	case E_RANGE:
 	case E_NONE:
 		/* panic */;
 	}
@@ -917,6 +918,7 @@ struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symb
 	case E_SYMBOL:
 		return expr_alloc_comp(type, e->left.sym, sym);
 	case E_CHOICE:
+	case E_RANGE:
 	case E_NONE:
 		/* panic */;
 	}
@@ -1043,6 +1045,13 @@ void expr_print(struct expr *e, void (*fn)(void *, const char *), void *data, in
 			expr_print(e->left.expr, fn, data, E_CHOICE);
 		}
 		break;
+	case E_RANGE:
+		fn(data, "[");
+		fn(data, e->left.sym->name);
+		fn(data, " ");
+		fn(data, e->right.sym->name);
+		fn(data, "]");
+		break;
 	default:
 	  {
 		char buf[32];

scripts/kconfig/expr.h

@@ -32,7 +32,7 @@ typedef enum tristate {
 } tristate;
 
 enum expr_type {
-	E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL
+	E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
 };
 
 union expr_data {
@@ -98,7 +98,7 @@ struct symbol {
 #define SYMBOL_HASHMASK		0xff
 
 enum prop_type {
-	P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT
+	P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
 };
 
 struct property {

scripts/kconfig/lkc_proto.h

@@ -25,6 +25,7 @@ P(sym_tristate_within_range,bool,(struct symbol *sym,tristate tri));
 P(sym_set_tristate_value,bool,(struct symbol *sym,tristate tri));
 P(sym_toggle_tristate_value,tristate,(struct symbol *sym));
 P(sym_string_valid,bool,(struct symbol *sym, const char *newval));
+P(sym_string_within_range,bool,(struct symbol *sym, const char *str));
 P(sym_set_string_value,bool,(struct symbol *sym, const char *newval));
 P(sym_is_changable,bool,(struct symbol *sym));
 P(sym_get_choice_prop,struct property *,(struct symbol *sym));

scripts/kconfig/symbol.c

@@ -130,6 +130,18 @@ struct property *sym_get_default_prop(struct symbol *sym)
 	return NULL;
 }
 
+struct property *sym_get_range_prop(struct symbol *sym)
+{
+	struct property *prop;
+
+	for_all_properties(sym, prop, P_RANGE) {
+		prop->visible.tri = expr_calc_value(prop->visible.expr);
+		if (prop->visible.tri != no)
+			return prop;
+	}
+	return NULL;
+}
+
 static void sym_calc_visibility(struct symbol *sym)
 {
 	struct property *prop;
@@ -432,6 +444,46 @@ bool sym_string_valid(struct symbol *sym, const char *str)
 		} while ((ch = *str++));
 		return true;
 	case S_BOOLEAN:
+	case S_TRISTATE:
+		switch (str[0]) {
+		case 'y': case 'Y':
+		case 'm': case 'M':
+		case 'n': case 'N':
+			return true;
+		}
+		return false;
+	default:
+		return false;
+	}
+}
+
+bool sym_string_within_range(struct symbol *sym, const char *str)
+{
+	struct property *prop;
+	int val;
+
+	switch (sym->type) {
+	case S_STRING:
+		return sym_string_valid(sym, str);
+	case S_INT:
+		if (!sym_string_valid(sym, str))
+			return false;
+		prop = sym_get_range_prop(sym);
+		if (!prop)
+			return true;
+		val = strtol(str, NULL, 10);
+		return val >= strtol(prop->expr->left.sym->name, NULL, 10) &&
+		       val <= strtol(prop->expr->right.sym->name, NULL, 10);
+	case S_HEX:
+		if (!sym_string_valid(sym, str))
+			return false;
+		prop = sym_get_range_prop(sym);
+		if (!prop)
+			return true;
+		val = strtol(str, NULL, 16);
+		return val >= strtol(prop->expr->left.sym->name, NULL, 16) &&
+		       val <= strtol(prop->expr->right.sym->name, NULL, 16);
+	case S_BOOLEAN:
 	case S_TRISTATE:
 		switch (str[0]) {
 		case 'y': case 'Y':
@@ -469,7 +521,7 @@ bool sym_set_string_value(struct symbol *sym, const char *newval)
 		;
 	}
 
-	if (!sym_string_valid(sym, newval))
+	if (!sym_string_within_range(sym, newval))
 		return false;
 
 	if (sym->flags & SYMBOL_NEW) {
@@ -644,6 +696,8 @@ const char *prop_get_type_name(enum prop_type type)
 		return "choice";
 	case P_SELECT:
 		return "select";
+	case P_RANGE:
+		return "range";
 	case P_UNKNOWN:
 		break;
 	}

scripts/kconfig/zconf.tab.c_shipped

@@ -1414,6 +1414,7 @@ yyreduce:
   case 37:
 
     {
+	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,yyvsp[-3].symbol, yyvsp[-2].symbol), yyvsp[-1].expr);
 	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 ;}
     break;

scripts/kconfig/zconf.y

@@ -221,6 +221,7 @@ config_option: T_SELECT T_WORD if_expr T_EOL
 
 config_option: T_RANGE symbol symbol if_expr T_EOL
 {
+	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
 	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 };