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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#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_TRANS 0x0100 /* symbol is transitional only (not visible)*/#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 */