/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> */ #ifndef EXPR_H#define EXPR_H #ifdef __cplusplusextern "C" {#endif #include <assert.h>#include <stdio.h>#ifndef __cplusplus#include <stdbool.h>#endif #include <list_types.h> typedef enum tristate {	no, mod, yes} tristate; enum expr_type {	E_NONE, E_OR, E_AND, E_NOT,	E_EQUAL, E_UNEQUAL, E_LTH, E_LEQ, E_GTH, E_GEQ,	E_SYMBOL, E_RANGE}; union expr_data {	struct expr * const expr;	struct symbol * const sym;	void *_initdata;}; /** * struct expr - expression * * @node:  link node for the hash table * @type:  expressoin type * @val: calculated tristate value * @val_is_valid: indicate whether the value is valid * @left:  left node * @right: right node */struct expr {	struct hlist_node node;	enum expr_type type;	tristate val;	bool val_is_valid;	union expr_data left, right;}; #define EXPR_OR(dep1, dep2)	(((dep1)>(dep2))?(dep1):(dep2))#define EXPR_AND(dep1, dep2)	(((dep1)<(dep2))?(dep1):(dep2))#define EXPR_NOT(dep)		(2-(dep)) struct expr_value {	struct expr *expr;	tristate tri;}; struct symbol_value {	void *val;	tristate tri;}; enum symbol_type {	S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING}; /* enum values are used as index to symbol.def[] */enum {	S_DEF_USER,		/* main user value */	S_DEF_AUTO,		/* values read from auto.conf */	S_DEF_DEF3,		/* Reserved for UI usage */	S_DEF_DEF4,		/* Reserved for UI usage */	S_DEF_COUNT}; /* * Represents a configuration symbol. * * Choices are represented as a special kind of symbol with null name. * * @choice_link: linked to menu::choice_members */struct symbol {	/* link node for the hash table */	struct hlist_node node; 	/* 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; 	/* config entries associated with this symbol */	struct list_head menus; 	struct list_head choice_link; 	/* 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 SYMBOL_CONST      0x0001  /* symbol is const */#define SYMBOL_CHECK      0x0008  /* used during dependency checking */#define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */#define SYMBOL_WRITE      0x0200  /* write symbol to file (KCONFIG_CONFIG) */#define SYMBOL_WRITTEN    0x0800  /* track info to avoid double-write to .config */#define SYMBOL_CHECKED    0x2000  /* used during dependency checking */#define SYMBOL_WARNED     0x8000  /* warning has been issued */ /* Set when symbol.def[] is used */#define SYMBOL_DEF        0x10000  /* First bit of SYMBOL_DEF */#define SYMBOL_DEF_USER   0x10000  /* symbol.def[S_DEF_USER] is valid */#define SYMBOL_DEF_AUTO   0x20000  /* symbol.def[S_DEF_AUTO] is valid */#define SYMBOL_DEF3       0x40000  /* symbol.def[S_DEF_3] is valid */#define SYMBOL_DEF4       0x80000  /* symbol.def[S_DEF_4] is valid */ #define SYMBOL_MAXLENGTH	256 /* A property represent the config options that can be associated * with a config "symbol". * Sample: * config FOO *         default y *         prompt "foo prompt" *         select BAR * 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 menu or menuconfig symbol */	P_DEFAULT,  /* default y */	P_SELECT,   /* select BAR */	P_IMPLY,    /* imply BAR */	P_RANGE,    /* range 7..100 (for a symbol) */}; struct property {	struct property *next;     /* next property - null if last */	enum prop_type type;       /* type of property */	const char *text;          /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */	struct expr_value visible;	struct expr *expr;         /* the optional conditional part of the property */	struct menu *menu;         /* the menu the property are associated with	                            * valid for: P_SELECT, P_RANGE,	                            * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */	const char *filename;      /* what file was this property defined */	int lineno;                /* what lineno was this property defined */}; #define for_all_properties(sym, st, tok) \	for (st = sym->prop; st; st = st->next) \		if (st->type == (tok))#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)#define for_all_prompts(sym, st) \	for (st = sym->prop; st; st = st->next) \		if (st->text) enum menu_type {	M_CHOICE,  // "choice"	M_COMMENT, // "comment"	M_IF,      // "if"	M_MENU,    // "mainmenu", "menu", "menuconfig"	M_NORMAL,  // others, i.e., "config"}; /* * 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. * * @type: type of the menu entry * @choice_members: list of choice members with priority. */struct menu {	enum menu_type type; 	/* 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; 	struct list_head link;	/* link to symbol::menus */ 	struct list_head choice_members; 	/*	 * 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 */	const char *filename;	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 list_head entries;	size_t offset;	struct menu *target;}; extern struct symbol symbol_yes, symbol_no, symbol_mod;extern struct symbol *modules_sym;extern int cdebug;struct expr *expr_alloc_symbol(struct symbol *sym);struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);bool expr_eq(struct expr *e1, struct expr *e2);tristate expr_calc_value(struct expr *e);struct expr *expr_eliminate_dups(struct expr *e);struct expr *expr_transform(struct expr *e);bool 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); void expr_fprint(struct expr *e, FILE *out);struct gstr; /* forward */void expr_gstr_print(const 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 bool expr_is_yes(const struct expr *e){	return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);} #ifdef __cplusplus}#endif #endif /* EXPR_H */