LXR linux/scripts/kconfig/expr.h

   1/*
   2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   3 * Released under the terms of the GNU GPL v2.0.
   4 */
   5
   6#ifndef EXPR_H
   7#define EXPR_H
   8
   9#ifdef __cplusplus
  10extern "C" {
  11#endif
  12
  13#include <stdio.h>
  14#ifndef __cplusplus
  15#include <stdbool.h>
  16#endif
  17
  18struct file {
  19        struct file *next;
  20        struct file *parent;
  21        char *name;
  22        int lineno;
  23        int flags;
  24};
  25
  26#define FILE_BUSY               0x0001
  27#define FILE_SCANNED            0x0002
  28
  29typedef enum tristate {
  30        no, mod, yes
  31} tristate;
  32
  33enum expr_type {
  34        E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
  35};
  36
  37union expr_data {
  38        struct expr *expr;
  39        struct symbol *sym;
  40};
  41
  42struct expr {
  43        enum expr_type type;
  44        union expr_data left, right;
  45};
  46
  47#define EXPR_OR(dep1, dep2)     (((dep1)>(dep2))?(dep1):(dep2))
  48#define EXPR_AND(dep1, dep2)    (((dep1)<(dep2))?(dep1):(dep2))
  49#define EXPR_NOT(dep)           (2-(dep))
  50
  51#define expr_list_for_each_sym(l, e, s) \
  52        for (e = (l); e && (s = e->right.sym); e = e->left.expr)
  53
  54struct expr_value {
  55        struct expr *expr;
  56        tristate tri;
  57};
  58
  59struct symbol_value {
  60        void *val;
  61        tristate tri;
  62};
  63
  64enum symbol_type {
  65        S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
  66};
  67
  68/* enum values are used as index to symbol.def[] */
  69enum {
  70        S_DEF_USER,             /* main user value */
  71        S_DEF_AUTO,             /* values read from auto.conf */
  72        S_DEF_DEF3,             /* Reserved for UI usage */
  73        S_DEF_DEF4,             /* Reserved for UI usage */
  74        S_DEF_COUNT
  75};
  76
  77struct symbol {
  78        struct symbol *next;
  79        char *name;
  80        enum symbol_type type;
  81        struct symbol_value curr;
  82        struct symbol_value def[S_DEF_COUNT];
  83        tristate visible;
  84        int flags;
  85        struct property *prop;
  86        struct expr_value rev_dep;
  87};
  88
  89#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)
  90
  91#define SYMBOL_CONST      0x0001  /* symbol is const */
  92#define SYMBOL_CHECK      0x0008  /* used during dependency checking */
  93#define SYMBOL_CHOICE     0x0010  /* start of a choice block (null name) */
  94#define SYMBOL_CHOICEVAL  0x0020  /* used as a value in a choice block */
  95#define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */
  96#define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
  97#define SYMBOL_WRITE      0x0200  /* ? */
  98#define SYMBOL_CHANGED    0x0400  /* ? */
  99#define SYMBOL_AUTO       0x1000  /* value from environment variable */
 100#define SYMBOL_CHECKED    0x2000  /* used during dependency checking */
 101#define SYMBOL_WARNED     0x8000  /* warning has been issued */
 102
 103/* Set when symbol.def[] is used */
 104#define SYMBOL_DEF        0x10000  /* First bit of SYMBOL_DEF */
 105#define SYMBOL_DEF_USER   0x10000  /* symbol.def[S_DEF_USER] is valid */
 106#define SYMBOL_DEF_AUTO   0x20000  /* symbol.def[S_DEF_AUTO] is valid */
 107#define SYMBOL_DEF3       0x40000  /* symbol.def[S_DEF_3] is valid */
 108#define SYMBOL_DEF4       0x80000  /* symbol.def[S_DEF_4] is valid */
 109
 110#define SYMBOL_MAXLENGTH        256
 111#define SYMBOL_HASHSIZE         257
 112#define SYMBOL_HASHMASK         0xff
 113
 114/* A property represent the config options that can be associated
 115 * with a config "symbol".
 116 * Sample:
 117 * config FOO
 118 *         default y
 119 *         prompt "foo prompt"
 120 *         select BAR
 121 * config BAZ
 122 *         int "BAZ Value"
 123 *         range 1..255
 124 */
 125enum prop_type {
 126        P_UNKNOWN,
 127        P_PROMPT,   /* prompt "foo prompt" or "BAZ Value" */
 128        P_COMMENT,  /* text associated with a comment */
 129        P_MENU,     /* prompt associated with a menuconfig option */
 130        P_DEFAULT,  /* default y */
 131        P_CHOICE,   /* choice value */
 132        P_SELECT,   /* select BAR */
 133        P_RANGE,    /* range 7..100 (for a symbol) */
 134        P_ENV,      /* value from environment variable */
 135};
 136
 137struct property {
 138        struct property *next;     /* next property - null if last */
 139        struct symbol *sym;        /* the symbol for which the property is associated */
 140        enum prop_type type;       /* type of property */
 141        const char *text;          /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
 142        struct expr_value visible;
 143        struct expr *expr;         /* the optional conditional part of the property */
 144        struct menu *menu;         /* the menu the property are associated with
 145                                    * valid for: P_SELECT, P_RANGE, P_CHOICE,
 146                                    * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
 147        struct file *file;         /* what file was this property defined */
 148        int lineno;                /* what lineno was this property defined */
 149};
 150
 151#define for_all_properties(sym, st, tok) \
 152        for (st = sym->prop; st; st = st->next) \
 153                if (st->type == (tok))
 154#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
 155#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
 156#define for_all_prompts(sym, st) \
 157        for (st = sym->prop; st; st = st->next) \
 158                if (st->text)
 159
 160struct menu {
 161        struct menu *next;
 162        struct menu *parent;
 163        struct menu *list;
 164        struct symbol *sym;
 165        struct property *prompt;
 166        struct expr *dep;
 167        unsigned int flags;
 168        char *help;
 169        struct file *file;
 170        int lineno;
 171        void *data;
 172};
 173
 174#define MENU_CHANGED            0x0001
 175#define MENU_ROOT               0x0002
 176
 177#ifndef SWIG
 178
 179extern struct file *file_list;
 180extern struct file *current_file;
 181struct file *lookup_file(const char *name);
 182
 183extern struct symbol symbol_yes, symbol_no, symbol_mod;
 184extern struct symbol *modules_sym;
 185extern struct symbol *sym_defconfig_list;
 186extern int cdebug;
 187struct expr *expr_alloc_symbol(struct symbol *sym);
 188struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
 189struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
 190struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
 191struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
 192struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
 193struct expr *expr_copy(struct expr *org);
 194void expr_free(struct expr *e);
 195int expr_eq(struct expr *e1, struct expr *e2);
 196void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
 197tristate expr_calc_value(struct expr *e);
 198struct expr *expr_eliminate_yn(struct expr *e);
 199struct expr *expr_trans_bool(struct expr *e);
 200struct expr *expr_eliminate_dups(struct expr *e);
 201struct expr *expr_transform(struct expr *e);
 202int expr_contains_symbol(struct expr *dep, struct symbol *sym);
 203bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
 204struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
 205struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
 206void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
 207struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
 208
 209void expr_fprint(struct expr *e, FILE *out);
 210struct gstr; /* forward */
 211void expr_gstr_print(struct expr *e, struct gstr *gs);
 212
 213static inline int expr_is_yes(struct expr *e)
 214{
 215        return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
 216}
 217
 218static inline int expr_is_no(struct expr *e)
 219{
 220        return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
 221}
 222#endif
 223
 224#ifdef __cplusplus
 225}
 226#endif
 227
 228#endif /* EXPR_H */
 229