blob: 973b6f73336829a6290a0d2bb15a841086d9a18c [file] [log] [blame]
* Copyright (C) 2002 Roman Zippel <>
* Released under the terms of the GNU GPL v2.0.
#ifndef EXPR_H
#define EXPR_H
#ifdef __cplusplus
extern "C" {
#include <assert.h>
#include <stdio.h>
#include "list.h"
#ifndef __cplusplus
#include <stdbool.h>
struct file {
struct file *next;
struct file *parent;
const char *name;
int lineno;
typedef enum tristate {
no, mod, yes
} tristate;
enum expr_type {
union expr_data {
struct expr *expr;
struct symbol *sym;
struct expr {
enum expr_type type;
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))
#define expr_list_for_each_sym(l, e, s) \
for (e = (l); e && (s = e->right.sym); e = e->left.expr)
struct expr_value {
struct expr *expr;
tristate tri;
struct symbol_value {
void *val;
tristate tri;
enum symbol_type {
/* 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 */
struct symbol {
struct symbol *next;
char *name;
enum symbol_type type;
struct symbol_value curr;
struct symbol_value def[S_DEF_COUNT];
tristate visible;
int flags;
struct property *prop;
struct expr_value dir_dep;
struct expr_value rev_dep;
#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 SYMBOL_CONST 0x0001 /* symbol is const */
#define SYMBOL_CHECK 0x0008 /* used during dependency checking */
#define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
#define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
#define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
#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_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 */
/* choice values need to be set before calculating this symbol value */
/* Set symbol to y if allnoconfig; used for symbols that hide others */
#define SYMBOL_ALLNOCONFIG_Y 0x200000
#define SYMBOL_HASHSIZE 9973
/* 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
enum prop_type {
P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
P_COMMENT, /* text associated with a comment */
P_MENU, /* prompt associated with a menuconfig option */
P_DEFAULT, /* default y */
P_CHOICE, /* choice value */
P_SELECT, /* select BAR */
P_RANGE, /* range 7..100 (for a symbol) */
P_ENV, /* value from environment variable */
P_SYMBOL, /* where a symbol is defined */
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;
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_CHOICE,
struct file *file; /* 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_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
#define for_all_prompts(sym, st) \
for (st = sym->prop; st; st = st->next) \
if (st->text)
struct menu {
struct menu *next;
struct menu *parent;
struct menu *list;
struct symbol *sym;
struct property *prompt;
struct expr *visibility;
struct expr *dep;
unsigned int flags;
char *help;
struct file *file;
int lineno;
void *data;
#define MENU_CHANGED 0x0001
#define MENU_ROOT 0x0002
struct jump_key {
struct list_head entries;
size_t offset;
struct menu *target;
int index;
#define JUMP_NB 9
extern struct file *file_list;
extern struct file *current_file;
struct file *lookup_file(const char *name);
extern struct symbol symbol_yes, symbol_no, symbol_mod;
extern struct symbol *modules_sym;
extern struct symbol *sym_defconfig_list;
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);
struct expr *expr_copy(const struct expr *org);
void expr_free(struct expr *e);
void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
tristate expr_calc_value(struct expr *e);
struct expr *expr_trans_bool(struct expr *e);
struct expr *expr_eliminate_dups(struct expr *e);
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);
static inline int expr_is_yes(struct expr *e)
return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
static inline int expr_is_no(struct expr *e)
return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
#ifdef __cplusplus
#endif /* EXPR_H */