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
  10 extern "C" {
  11 #endif
  12
  13 #include <stdio.h>
  14 #ifndef __cplusplus
  15 #include <stdbool.h>
  16 #endif
  17
  18 struct 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
  29 typedef enum tristate {
  30         no, mod, yes
  31 } tristate;
  32
  33 enum expr_type {
  34         E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
  35 };
  36
  37 union expr_data {
  38         struct expr *expr;
  39         struct symbol *sym;
  40 };
  41
  42 struct 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
  54 struct expr_value {
  55         struct expr *expr;
  56         tristate tri;
  57 };
  58
  59 struct symbol_value {
  60         void *val;
  61         tristate tri;
  62 };
  63
  64 enum symbol_type {
  65         S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
  66 };
  67
  68 enum {
  69         S_DEF_USER,             /* main user value */
  70         S_DEF_AUTO,
  71 };
  72
  73 struct symbol {
  74         struct symbol *next;
  75         char *name;
  76         enum symbol_type type;
  77         struct symbol_value curr;
  78         struct symbol_value def[4];
  79         tristate visible;
  80         int flags;
  81         struct property *prop;
  82         struct expr_value rev_dep;
  83 };
  84
  85 #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)
  86
  87 #define SYMBOL_CONST            0x0001
  88 #define SYMBOL_CHECK            0x0008
  89 #define SYMBOL_CHOICE           0x0010
  90 #define SYMBOL_CHOICEVAL        0x0020
  91 #define SYMBOL_VALID            0x0080
  92 #define SYMBOL_OPTIONAL         0x0100
  93 #define SYMBOL_WRITE            0x0200
  94 #define SYMBOL_CHANGED          0x0400
  95 #define SYMBOL_AUTO             0x1000
  96 #define SYMBOL_CHECKED          0x2000
  97 #define SYMBOL_WARNED           0x8000
  98 #define SYMBOL_DEF              0x10000
  99 #define SYMBOL_DEF_USER         0x10000
 100 #define SYMBOL_DEF_AUTO         0x20000
 101 #define SYMBOL_DEF3             0x40000
 102 #define SYMBOL_DEF4             0x80000
 103
 104 #define SYMBOL_MAXLENGTH        256
 105 #define SYMBOL_HASHSIZE         257
 106 #define SYMBOL_HASHMASK         0xff
 107
 108 enum prop_type {
 109         P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE,
 110         P_SELECT, P_RANGE, P_ENV
 111 };
 112
 113 struct property {
 114         struct property *next;
 115         struct symbol *sym;
 116         enum prop_type type;
 117         const char *text;
 118         struct expr_value visible;
 119         struct expr *expr;
 120         struct menu *menu;
 121         struct file *file;
 122         int lineno;
 123 };
 124
 125 #define for_all_properties(sym, st, tok) \
 126         for (st = sym->prop; st; st = st->next) \
 127                 if (st->type == (tok))
 128 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
 129 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
 130 #define for_all_prompts(sym, st) \
 131         for (st = sym->prop; st; st = st->next) \
 132                 if (st->text)
 133
 134 struct menu {
 135         struct menu *next;
 136         struct menu *parent;
 137         struct menu *list;
 138         struct symbol *sym;
 139         struct property *prompt;
 140         struct expr *dep;
 141         unsigned int flags;
 142         char *help;
 143         struct file *file;
 144         int lineno;
 145         void *data;
 146 };
 147
 148 #define MENU_CHANGED            0x0001
 149 #define MENU_ROOT               0x0002
 150
 151 #ifndef SWIG
 152
 153 extern struct file *file_list;
 154 extern struct file *current_file;
 155 struct file *lookup_file(const char *name);
 156
 157 extern struct symbol symbol_yes, symbol_no, symbol_mod;
 158 extern struct symbol *modules_sym;
 159 extern struct symbol *sym_defconfig_list;
 160 extern int cdebug;
 161 struct expr *expr_alloc_symbol(struct symbol *sym);
 162 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
 163 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
 164 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
 165 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
 166 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
 167 struct expr *expr_copy(struct expr *org);
 168 void expr_free(struct expr *e);
 169 int expr_eq(struct expr *e1, struct expr *e2);
 170 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
 171 tristate expr_calc_value(struct expr *e);
 172 struct expr *expr_eliminate_yn(struct expr *e);
 173 struct expr *expr_trans_bool(struct expr *e);
 174 struct expr *expr_eliminate_dups(struct expr *e);
 175 struct expr *expr_transform(struct expr *e);
 176 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
 177 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
 178 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
 179 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
 180 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
 181 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
 182
 183 void expr_fprint(struct expr *e, FILE *out);
 184 struct gstr; /* forward */
 185 void expr_gstr_print(struct expr *e, struct gstr *gs);
 186
 187 static inline int expr_is_yes(struct expr *e)
 188 {
 189         return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
 190 }
 191
 192 static inline int expr_is_no(struct expr *e)
 193 {
 194         return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
 195 }
 196 #endif
 197
 198 #ifdef __cplusplus
 199 }
 200 #endif
 201
 202 #endif /* EXPR_H */