/*

 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>

 * Released under the terms of the GNU GPL v2.0.

 */

#ifndef EXPR_H

#define EXPR_H

#ifdef __cplusplus

extern "C" {

#endif

#include <stdio.h>

#ifndef __cplusplus

#include <stdbool.h>

#endif

struct file {

	struct file *next;

	struct file *parent;

	char *name;

	int lineno;

	int flags;

};

#define FILE_BUSY		0x0001

#define FILE_SCANNED		0x0002

#define FILE_PRINTED		0x0004

typedef enum tristate {

	no, mod, yes

} tristate;

enum expr_type {

	E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE

};

union expr_data {

	struct expr *expr;

	struct symbol *sym;

};

struct expr {

	enum expr_type type;

	union expr_data left, right;

};

#define E_OR(dep1, dep2)	(((dep1)>(dep2))?(dep1):(dep2))

#define E_AND(dep1, dep2)	(((dep1)<(dep2))?(dep1):(dep2))

#define E_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, S_OTHER

};

enum {

	S_DEF_USER,		/* main user value */

	S_DEF_AUTO,

};

struct symbol {

	struct symbol *next;

	char *name;

	char *help;

	enum symbol_type type;

	struct symbol_value curr;

	struct symbol_value def[4];

	tristate visible;

	int flags;

	struct property *prop;

	struct expr *dep, *dep2;

	struct expr_value rev_dep;

};

#define for_all_symbols(i, sym) for (i = 0; i < 257; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)

#define SYMBOL_CONST		0x0001

#define SYMBOL_CHECK		0x0008

#define SYMBOL_CHOICE		0x0010

#define SYMBOL_CHOICEVAL	0x0020

#define SYMBOL_PRINTED		0x0040

#define SYMBOL_VALID		0x0080

#define SYMBOL_OPTIONAL		0x0100

#define SYMBOL_WRITE		0x0200

#define SYMBOL_CHANGED		0x0400

#define SYMBOL_AUTO		0x1000

#define SYMBOL_CHECKED		0x2000

#define SYMBOL_WARNED		0x8000

#define SYMBOL_DEF		0x10000

#define SYMBOL_DEF_USER		0x10000

#define SYMBOL_DEF_AUTO		0x20000

#define SYMBOL_DEF3		0x40000

#define SYMBOL_DEF4		0x80000

#define SYMBOL_MAXLENGTH	256

#define SYMBOL_HASHSIZE		257

#define SYMBOL_HASHMASK		0xff

enum prop_type {

	P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE

};

struct property {

	struct property *next;

	struct symbol *sym;

	enum prop_type type;

	const char *text;

	struct expr_value visible;

	struct expr *expr;

	struct menu *menu;

	struct file *file;

	int lineno;

};

#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 *dep;

	unsigned int flags;

	//char *help;

	struct file *file;

	int lineno;

	void *data;

};

#define MENU_CHANGED		0x0001

#define MENU_ROOT		0x0002

#ifndef SWIG

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(struct expr *org);

void expr_free(struct expr *e);

int expr_eq(struct expr *e1, struct expr *e2);

void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);

tristate expr_calc_value(struct expr *e);

struct expr *expr_eliminate_yn(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_extract_eq_and(struct expr **ep1, struct expr **ep2);

struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);

void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);

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(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);

}

#endif

#ifdef __cplusplus

}

#endif

#endif /* EXPR_H */