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Diffstat (limited to 'scripts/kconfig/expr.h')
-rw-r--r--scripts/kconfig/expr.h93
1 files changed, 91 insertions, 2 deletions
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index a73f762c48..94a383b21d 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -74,17 +74,60 @@ enum {
S_DEF_COUNT
};
+/*
+ * Represents a configuration symbol.
+ *
+ * Choices are represented as a special kind of symbol and have the
+ * SYMBOL_CHOICE bit set in 'flags'.
+ */
struct symbol {
+ /* The next symbol in the same bucket in the symbol hash table */
struct symbol *next;
+
+ /* The name of the symbol, e.g. "FOO" for 'config FOO' */
char *name;
+
+ /* S_BOOLEAN, S_TRISTATE, ... */
enum symbol_type type;
+
+ /*
+ * The calculated value of the symbol. The SYMBOL_VALID bit is set in
+ * 'flags' when this is up to date. Note that this value might differ
+ * from the user value set in e.g. a .config file, due to visibility.
+ */
struct symbol_value curr;
+
+ /*
+ * Values for the symbol provided from outside. def[S_DEF_USER] holds
+ * the .config value.
+ */
struct symbol_value def[S_DEF_COUNT];
+
+ /*
+ * An upper bound on the tristate value the user can set for the symbol
+ * if it is a boolean or tristate. Calculated from prompt dependencies,
+ * which also inherit dependencies from enclosing menus, choices, and
+ * ifs. If 'n', the user value will be ignored.
+ *
+ * Symbols lacking prompts always have visibility 'n'.
+ */
tristate visible;
+
+ /* SYMBOL_* flags */
int flags;
+
+ /* List of properties. See prop_type. */
struct property *prop;
+
+ /* Dependencies from enclosing menus, choices, and ifs */
struct expr_value dir_dep;
+
+ /* Reverse dependencies through being selected by other symbols */
struct expr_value rev_dep;
+
+ /*
+ * "Weak" reverse dependencies through being implied by other symbols
+ */
struct expr_value implied;
};
@@ -133,7 +176,7 @@ enum prop_type {
P_UNKNOWN,
P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
P_COMMENT, /* text associated with a comment */
- P_MENU, /* prompt associated with a menuconfig option */
+ P_MENU, /* prompt associated with a menu or menuconfig symbol */
P_DEFAULT, /* default y */
P_CHOICE, /* choice value */
P_SELECT, /* select BAR */
@@ -166,22 +209,67 @@ struct property {
for (st = sym->prop; st; st = st->next) \
if (st->text)
+/*
+ * Represents a node in the menu tree, as seen in e.g. menuconfig (though used
+ * for all front ends). Each symbol, menu, etc. defined in the Kconfig files
+ * gets a node. A symbol defined in multiple locations gets one node at each
+ * location.
+ */
struct menu {
+ /* The next menu node at the same level */
struct menu *next;
+
+ /* The parent menu node, corresponding to e.g. a menu or choice */
struct menu *parent;
+
+ /* The first child menu node, for e.g. menus and choices */
struct menu *list;
+
+ /*
+ * The symbol associated with the menu node. Choices are implemented as
+ * a special kind of symbol. NULL for menus, comments, and ifs.
+ */
struct symbol *sym;
+
+ /*
+ * The prompt associated with the node. This holds the prompt for a
+ * symbol as well as the text for a menu or comment, along with the
+ * type (P_PROMPT, P_MENU, etc.)
+ */
struct property *prompt;
+
+ /*
+ * 'visible if' dependencies. If more than one is given, they will be
+ * ANDed together.
+ */
struct expr *visibility;
+
+ /*
+ * Ordinary dependencies from e.g. 'depends on' and 'if', ANDed
+ * together
+ */
struct expr *dep;
+
+ /* MENU_* flags */
unsigned int flags;
+
+ /* Any help text associated with the node */
char *help;
+
+ /* The location where the menu node appears in the Kconfig files */
struct file *file;
int lineno;
+
+ /* For use by front ends that need to store auxiliary data */
void *data;
};
+/*
+ * Set on a menu node when the corresponding symbol changes state in some way.
+ * Can be checked by front ends.
+ */
#define MENU_CHANGED 0x0001
+
#define MENU_ROOT 0x0002
struct jump_key {
@@ -217,11 +305,12 @@ struct expr *expr_transform(struct expr *e);
int expr_contains_symbol(struct expr *dep, struct symbol *sym);
bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
-struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
void expr_fprint(struct expr *e, FILE *out);
struct gstr; /* forward */
void expr_gstr_print(struct expr *e, struct gstr *gs);
+void expr_gstr_print_revdep(struct expr *e, struct gstr *gs,
+ tristate pr_type, const char *title);
static inline int expr_is_yes(struct expr *e)
{