+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
- * Released under the terms of the GNU GPL v2.0.
*/
#ifndef EXPR_H
};
enum symbol_type {
- S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
+ S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING
};
/* enum values are used as index to symbol.def[] */
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;
};
-#define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
+#define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next)
#define SYMBOL_CONST 0x0001 /* symbol is const */
#define SYMBOL_CHECK 0x0008 /* used during dependency checking */
#define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
#define SYMBOL_WRITE 0x0200 /* write symbol to file (KCONFIG_CONFIG) */
#define SYMBOL_CHANGED 0x0400 /* ? */
-#define SYMBOL_AUTO 0x1000 /* value from environment variable */
+#define SYMBOL_WRITTEN 0x0800 /* track info to avoid double-write to .config */
+#define SYMBOL_NO_WRITE 0x1000 /* Symbol for internal use only; it will not be written */
#define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
#define SYMBOL_WARNED 0x8000 /* warning has been issued */
* config BAZ
* int "BAZ Value"
* range 1..255
+ *
+ * Please, also check parser.y:print_symbol() when modifying the
+ * list of property types!
*/
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 */
+ P_IMPLY, /* imply BAR */
P_RANGE, /* range 7..100 (for a symbol) */
- P_ENV, /* value from environment variable */
P_SYMBOL, /* where a symbol is defined */
P_RESET, /* reset to defaults condition */
};
struct property {
struct property *next; /* next property - null if last */
- struct symbol *sym; /* the symbol for which the property is associated */
enum prop_type type; /* type of property */
const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
struct expr_value visible;
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 {
struct expr *expr_copy(const struct expr *org);
void expr_free(struct expr *e);
void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
+int expr_eq(struct expr *e1, struct expr *e2);
tristate expr_calc_value(struct expr *e);
struct expr *expr_trans_bool(struct expr *e);
struct expr *expr_eliminate_dups(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)
{
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