busybox

/*

 * 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

};

​

struct symbol {

    struct symbol *next;

    char *name;

    char *help;

    enum symbol_type type;

    struct symbol_value curr, user;

    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_YES      0x0001

#define SYMBOL_MOD      0x0002

#define SYMBOL_NO       0x0004

#define SYMBOL_CONST        0x0007

#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