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Subject[PATCH 1/3] explicitly introduce expression list

Rename E_CHOICE to E_LIST to explicitly add support for expression
lists. Add a helper macro expr_list_for_each_sym to more easily iterate
over the list.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>

---
scripts/kconfig/confdata.c | 8 ++++----
scripts/kconfig/expr.c | 16 ++++++++--------
scripts/kconfig/expr.h | 5 ++++-
scripts/kconfig/menu.c | 2 +-
scripts/kconfig/symbol.c | 13 +++++++------
5 files changed, 24 insertions(+), 20 deletions(-)
Index: linux-2.6/scripts/kconfig/confdata.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/confdata.c
+++ linux-2.6/scripts/kconfig/confdata.c
@@ -316,7 +316,7 @@ load:

int conf_read(const char *name)
{
- struct symbol *sym;
+ struct symbol *sym, *choice_sym;
struct property *prop;
struct expr *e;
int i, flags;
@@ -357,9 +357,9 @@ int conf_read(const char *name)
*/
prop = sym_get_choice_prop(sym);
flags = sym->flags;
- for (e = prop->expr; e; e = e->left.expr)
- if (e->right.sym->visible != no)
- flags &= e->right.sym->flags;
+ expr_list_for_each_sym(prop->expr, e, choice_sym)
+ if (choice_sym->visible != no)
+ flags &= choice_sym->flags;
sym->flags &= flags | ~SYMBOL_DEF_USER;
}

Index: linux-2.6/scripts/kconfig/expr.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/expr.c
+++ linux-2.6/scripts/kconfig/expr.c
@@ -87,7 +87,7 @@ struct expr *expr_copy(struct expr *org)
break;
case E_AND:
case E_OR:
- case E_CHOICE:
+ case E_LIST:
e->left.expr = expr_copy(org->left.expr);
e->right.expr = expr_copy(org->right.expr);
break;
@@ -217,7 +217,7 @@ int expr_eq(struct expr *e1, struct expr
expr_free(e2);
trans_count = old_count;
return res;
- case E_CHOICE:
+ case E_LIST:
case E_RANGE:
case E_NONE:
/* panic */;
@@ -648,7 +648,7 @@ struct expr *expr_transform(struct expr
case E_EQUAL:
case E_UNEQUAL:
case E_SYMBOL:
- case E_CHOICE:
+ case E_LIST:
break;
default:
e->left.expr = expr_transform(e->left.expr);
@@ -932,7 +932,7 @@ struct expr *expr_trans_compare(struct e
break;
case E_SYMBOL:
return expr_alloc_comp(type, e->left.sym, sym);
- case E_CHOICE:
+ case E_LIST:
case E_RANGE:
case E_NONE:
/* panic */;
@@ -1000,9 +1000,9 @@ int expr_compare_type(enum expr_type t1,
if (t2 == E_OR)
return 1;
case E_OR:
- if (t2 == E_CHOICE)
+ if (t2 == E_LIST)
return 1;
- case E_CHOICE:
+ case E_LIST:
if (t2 == 0)
return 1;
default:
@@ -1053,11 +1053,11 @@ void expr_print(struct expr *e, void (*f
fn(data, NULL, " && ");
expr_print(e->right.expr, fn, data, E_AND);
break;
- case E_CHOICE:
+ case E_LIST:
fn(data, e->right.sym, e->right.sym->name);
if (e->left.expr) {
fn(data, NULL, " ^ ");
- expr_print(e->left.expr, fn, data, E_CHOICE);
+ expr_print(e->left.expr, fn, data, E_LIST);
}
break;
case E_RANGE:
Index: linux-2.6/scripts/kconfig/expr.h
===================================================================
--- linux-2.6.orig/scripts/kconfig/expr.h
+++ linux-2.6/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_RANGE
+ E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
};

union expr_data {
@@ -49,6 +49,9 @@ struct expr {
#define E_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
#define E_NOT(dep) (2-(dep))

+#define expr_list_for_each_sym(l, e, s) \
+ for (e = (l); e && (s = e->right.sym); e = e->left.expr)
+
struct expr_value {
struct expr *expr;
tristate tri;
Index: linux-2.6/scripts/kconfig/menu.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/menu.c
+++ linux-2.6/scripts/kconfig/menu.c
@@ -331,7 +331,7 @@ void menu_finalize(struct menu *parent)
prop = sym_get_choice_prop(sym);
for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
;
- *ep = expr_alloc_one(E_CHOICE, NULL);
+ *ep = expr_alloc_one(E_LIST, NULL);
(*ep)->right.sym = menu->sym;
}
if (menu->list && (!menu->prompt || !menu->prompt->text)) {
Index: linux-2.6/scripts/kconfig/symbol.c
===================================================================
--- linux-2.6.orig/scripts/kconfig/symbol.c
+++ linux-2.6/scripts/kconfig/symbol.c
@@ -247,8 +247,7 @@ static struct symbol *sym_calc_choice(st

/* just get the first visible value */
prop = sym_get_choice_prop(sym);
- for (e = prop->expr; e; e = e->left.expr) {
- def_sym = e->right.sym;
+ expr_list_for_each_sym(prop->expr, e, def_sym) {
sym_calc_visibility(def_sym);
if (def_sym->visible != no)
return def_sym;
@@ -361,12 +360,14 @@ void sym_calc_value(struct symbol *sym)
}

if (sym_is_choice(sym)) {
+ struct symbol *choice_sym;
int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE);
+
prop = sym_get_choice_prop(sym);
- for (e = prop->expr; e; e = e->left.expr) {
- e->right.sym->flags |= flags;
+ expr_list_for_each_sym(prop->expr, e, choice_sym) {
+ choice_sym->flags |= flags;
if (flags & SYMBOL_CHANGED)
- sym_set_changed(e->right.sym);
+ sym_set_changed(choice_sym);
}
}
}
@@ -849,7 +850,7 @@ struct property *prop_alloc(enum prop_ty
struct symbol *prop_get_symbol(struct property *prop)
{
if (prop->expr && (prop->expr->type == E_SYMBOL ||
- prop->expr->type == E_CHOICE))
+ prop->expr->type == E_LIST))
return prop->expr->left.sym;
return NULL;
}

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