kconfig: allow multiple default values per symbol

Extend struct symbol to allow storing multiple default values, which can be
used to hold multiple configurations.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

3 files changed, 31 insertions, 26 deletions

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 2da4a8d775a..54ca1a786d2 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -134,11 +134,11 @@ load:
                 case S_INT:
                 case S_HEX:
                 case S_STRING:
-                        if (sym->user.val)
-                                free(sym->user.val);
+                        if (sym->def[S_DEF_USER].val)
+                                free(sym->def[S_DEF_USER].val);
                 default:
-                        sym->user.val = NULL;
-                        sym->user.tri = no;
+                        sym->def[S_DEF_USER].val = NULL;
+                        sym->def[S_DEF_USER].tri = no;
                 }
         }
 
@@ -166,7 +166,7 @@ load:
                         switch (sym->type) {
                         case S_BOOLEAN:
                         case S_TRISTATE:
-                                sym->user.tri = no;
+                                sym->def[S_DEF_USER].tri = no;
                                 sym->flags &= ~SYMBOL_NEW;
                                 break;
                         default:
@@ -196,18 +196,18 @@ load:
                         switch (sym->type) {
                         case S_TRISTATE:
                                 if (p[0] == 'm') {
-                                        sym->user.tri = mod;
+                                        sym->def[S_DEF_USER].tri = mod;
                                         sym->flags &= ~SYMBOL_NEW;
                                         break;
                                 }
                         case S_BOOLEAN:
                                 if (p[0] == 'y') {
-                                        sym->user.tri = yes;
+                                        sym->def[S_DEF_USER].tri = yes;
                                         sym->flags &= ~SYMBOL_NEW;
                                         break;
                                 }
                                 if (p[0] == 'n') {
-                                        sym->user.tri = no;
+                                        sym->def[S_DEF_USER].tri = no;
                                         sym->flags &= ~SYMBOL_NEW;
                                         break;
                                 }
@@ -230,7 +230,7 @@ load:
                         case S_INT:
                         case S_HEX:
                                 if (sym_string_valid(sym, p)) {
-                                        sym->user.val = strdup(p);
+                                        sym->def[S_DEF_USER].val = strdup(p);
                                         sym->flags &= ~SYMBOL_NEW;
                                 } else {
                                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
@@ -249,24 +249,24 @@ load:
                 }
                 if (sym && sym_is_choice_value(sym)) {
                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
-                        switch (sym->user.tri) {
+                        switch (sym->def[S_DEF_USER].tri) {
                         case no:
                                 break;
                         case mod:
-                                if (cs->user.tri == yes) {
+                                if (cs->def[S_DEF_USER].tri == yes) {
                                         conf_warning("%s creates inconsistent choice state", sym->name);
                                         cs->flags |= SYMBOL_NEW;
                                 }
                                 break;
                         case yes:
-                                if (cs->user.tri != no) {
+                                if (cs->def[S_DEF_USER].tri != no) {
                                         conf_warning("%s creates inconsistent choice state", sym->name);
                                         cs->flags |= SYMBOL_NEW;
                                 } else
-                                        cs->user.val = sym;
+                                        cs->def[S_DEF_USER].val = sym;
                                 break;
                         }
-                        cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
+                        cs->def[S_DEF_USER].tri = E_OR(cs->def[S_DEF_USER].tri, sym->def[S_DEF_USER].tri);
                 }
         }
         fclose(in);
@@ -297,12 +297,12 @@ int conf_read(const char *name)
                         switch (sym->type) {
                         case S_BOOLEAN:
                         case S_TRISTATE:
-                                if (sym->user.tri != sym_get_tristate_value(sym))
+                                if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
                                         break;
                                 if (!sym_is_choice(sym))
                                         goto sym_ok;
                         default:
-                                if (!strcmp(sym->curr.val, sym->user.val))
+                                if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
                                         goto sym_ok;
                                 break;
                         }
@@ -319,7 +319,7 @@ int conf_read(const char *name)
                         case S_STRING:
                         case S_INT:
                         case S_HEX:
-                                if (!sym_string_within_range(sym, sym->user.val)) {
+                                if (!sym_string_within_range(sym, sym->def[S_DEF_USER].val)) {
                                         sym->flags |= SYMBOL_NEW;
                                         sym->flags &= ~SYMBOL_VALID;
                                 }
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 52ea4df8e34..043859d426d 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -63,12 +63,17 @@ enum symbol_type {
         S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
 };
 
+enum {
+        S_DEF_USER,             /* main user value */
+};
+
 struct symbol {
         struct symbol *next;
         char *name;
         char *help;
         enum symbol_type type;
-        struct symbol_value curr, user;
+        struct symbol_value curr;
+        struct symbol_value def[4];
         tristate visible;
         int flags;
         struct property *prop;
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index a0a467a4387..4ea0050dcb1 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -227,7 +227,7 @@ static struct symbol *sym_calc_choice(struct symbol *sym)
         struct expr *e;
 
         /* is the user choice visible? */
-        def_sym = sym->user.val;
+        def_sym = sym->def[S_DEF_USER].val;
         if (def_sym) {
                 sym_calc_visibility(def_sym);
                 if (def_sym->visible != no)
@@ -306,7 +306,7 @@ void sym_calc_value(struct symbol *sym)
                 } else if (E_OR(sym->visible, sym->rev_dep.tri) != no) {
                         sym->flags |= SYMBOL_WRITE;
                         if (sym_has_value(sym))
-                                newval.tri = sym->user.tri;
+                                newval.tri = sym->def[S_DEF_USER].tri;
                         else if (!sym_is_choice(sym)) {
                                 prop = sym_get_default_prop(sym);
                                 if (prop)
@@ -329,7 +329,7 @@ void sym_calc_value(struct symbol *sym)
                 if (sym->visible != no) {
                         sym->flags |= SYMBOL_WRITE;
                         if (sym_has_value(sym)) {
-                                newval.val = sym->user.val;
+                                newval.val = sym->def[S_DEF_USER].val;
                                 break;
                         }
                 }
@@ -439,7 +439,7 @@ bool sym_set_tristate_value(struct symbol *sym, tristate val)
                 struct property *prop;
                 struct expr *e;
 
-                cs->user.val = sym;
+                cs->def[S_DEF_USER].val = sym;
                 cs->flags &= ~SYMBOL_NEW;
                 prop = sym_get_choice_prop(cs);
                 for (e = prop->expr; e; e = e->left.expr) {
@@ -448,7 +448,7 @@ bool sym_set_tristate_value(struct symbol *sym, tristate val)
                 }
         }
 
-        sym->user.tri = val;
+        sym->def[S_DEF_USER].tri = val;
         if (oldval != val) {
                 sym_clear_all_valid();
                 if (sym == modules_sym)
@@ -596,15 +596,15 @@ bool sym_set_string_value(struct symbol *sym, const char *newval)
                 sym_set_changed(sym);
         }
 
-        oldval = sym->user.val;
+        oldval = sym->def[S_DEF_USER].val;
         size = strlen(newval) + 1;
         if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
                 size += 2;
-                sym->user.val = val = malloc(size);
+                sym->def[S_DEF_USER].val = val = malloc(size);
                 *val++ = '0';
                 *val++ = 'x';
         } else if (!oldval || strcmp(oldval, newval))
-                sym->user.val = val = malloc(size);
+                sym->def[S_DEF_USER].val = val = malloc(size);
         else
                 return true;