package/config/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 #define FILE_PRINTED            0x0004
  29
  30 typedef enum tristate {
  31         no, mod, yes
  32 } tristate;
  33
  34 enum expr_type {
  35         E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
  36 };
  37
  38 union expr_data {
  39         struct expr *expr;
  40         struct symbol *sym;
  41 };
  42
  43 struct expr {
  44         enum expr_type type;
  45         union expr_data left, right;
  46 };
  47
  48 #define E_OR(dep1, dep2)        (((dep1)>(dep2))?(dep1):(dep2))
  49 #define E_AND(dep1, dep2)       (((dep1)<(dep2))?(dep1):(dep2))
  50 #define E_NOT(dep)              (2-(dep))
  51
  52 struct expr_value {
  53         struct expr *expr;
  54         tristate tri;
  55 };
  56
  57 struct symbol_value {
  58         void *val;
  59         tristate tri;
  60 };
  61
  62 enum symbol_type {
  63         S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
  64 };
  65
  66 enum {
  67         S_DEF_USER,             /* main user value */
  68         S_DEF_AUTO
  69 };
  70
  71 struct symbol {
  72         struct symbol *next;
  73         char *name;
  74         enum symbol_type type;
  75         struct symbol_value curr;
  76         struct symbol_value def[4];
  77         tristate visible;
  78         int flags;
  79         struct property *prop;
  80         struct expr_value rev_dep;
  81 };
  82
  83 #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)
  84
  85 #define SYMBOL_CONST            0x0001
  86 #define SYMBOL_CHECK            0x0008
  87 #define SYMBOL_CHOICE           0x0010
  88 #define SYMBOL_CHOICEVAL        0x0020
  89 #define SYMBOL_PRINTED          0x0040
  90 #define SYMBOL_VALID            0x0080
  91 #define SYMBOL_OPTIONAL         0x0100
  92 #define SYMBOL_WRITE            0x0200
  93 #define SYMBOL_CHANGED          0x0400
  94 #define SYMBOL_AUTO             0x1000
  95 #define SYMBOL_CHECKED          0x2000
  96 #define SYMBOL_WARNED           0x8000
  97 #define SYMBOL_DEF              0x10000
  98 #define SYMBOL_DEF_USER         0x10000
  99 #define SYMBOL_DEF_AUTO         0x20000
 100 #define SYMBOL_DEF3             0x40000
 101 #define SYMBOL_DEF4             0x80000
 102
 103 #define SYMBOL_MAXLENGTH        256
 104 #define SYMBOL_HASHSIZE         257
 105 #define SYMBOL_HASHMASK         0xff
 106
 107 enum prop_type {
 108         P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
 109 };
 110
 111 struct property {
 112         struct property *next;
 113         struct symbol *sym;
 114         enum prop_type type;
 115         const char *text;
 116         struct expr_value visible;
 117         struct expr *expr;
 118         struct menu *menu;
 119         struct file *file;
 120         int lineno;
 121 };
 122
 123 #define for_all_properties(sym, st, tok) \
 124         for (st = sym->prop; st; st = st->next) \
 125                 if (st->type == (tok))
 126 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
 127 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
 128 #define for_all_prompts(sym, st) \
 129         for (st = sym->prop; st; st = st->next) \
 130                 if (st->text)
 131
 132 struct menu {
 133         struct menu *next;
 134         struct menu *parent;
 135         struct menu *list;
 136         struct symbol *sym;
 137         struct property *prompt;
 138         struct expr *dep;
 139         unsigned int flags;
 140         char *help;
 141         struct file *file;
 142         int lineno;
 143         void *data;
 144 };
 145
 146 #define MENU_CHANGED            0x0001
 147 #define MENU_ROOT               0x0002
 148
 149 #ifndef SWIG
 150
 151 extern struct file *file_list;
 152 extern struct file *current_file;
 153 struct file *lookup_file(const char *name);
 154
 155 extern struct symbol symbol_yes, symbol_no, symbol_mod;
 156 extern struct symbol *modules_sym;
 157 extern struct symbol *sym_defconfig_list;
 158 extern int cdebug;
 159 struct expr *expr_alloc_symbol(struct symbol *sym);
 160 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
 161 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
 162 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
 163 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
 164 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
 165 struct expr *expr_copy(struct expr *org);
 166 void expr_free(struct expr *e);
 167 int expr_eq(struct expr *e1, struct expr *e2);
 168 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
 169 tristate expr_calc_value(struct expr *e);
 170 struct expr *expr_eliminate_yn(struct expr *e);
 171 struct expr *expr_trans_bool(struct expr *e);
 172 struct expr *expr_eliminate_dups(struct expr *e);
 173 struct expr *expr_transform(struct expr *e);
 174 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
 175 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
 176 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
 177 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
 178 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
 179 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
 180
 181 void expr_fprint(struct expr *e, FILE *out);
 182 struct gstr; /* forward */
 183 void expr_gstr_print(struct expr *e, struct gstr *gs);
 184
 185 static inline int expr_is_yes(struct expr *e)
 186 {
 187         return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
 188 }
 189
 190 static inline int expr_is_no(struct expr *e)
 191 {
 192         return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
 193 }
 194 #endif
 195
 196 #ifdef __cplusplus
 197 }
 198 #endif
 199
 200 #endif /* EXPR_H */