release/src/router/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 #ifdef CML1
  22         struct statement *stmt;
  23         struct statement *last_stmt;
  24 #endif
  25         char *name;
  26         int lineno;
  27         int flags;
  28 };
  29
  30 #define FILE_BUSY               0x0001
  31 #define FILE_SCANNED            0x0002
  32 #define FILE_PRINTED            0x0004
  33
  34 typedef enum tristate {
  35         no, mod, yes
  36 } tristate;
  37
  38 enum expr_type {
  39         E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL
  40 };
  41
  42 union expr_data {
  43         struct expr *expr;
  44         struct symbol *sym;
  45 };
  46
  47 struct expr {
  48 #ifdef CML1
  49         int token;
  50 #else
  51         enum expr_type type;
  52 #endif
  53         union expr_data left, right;
  54 };
  55
  56 #define E_TRI(ev)       ((ev).tri)
  57 #define E_EXPR(ev)      ((ev).expr)
  58 #define E_CALC(ev)      (E_TRI(ev) = expr_calc_value(E_EXPR(ev)))
  59
  60 #define E_OR(dep1, dep2)        (((dep1)>(dep2))?(dep1):(dep2))
  61 #define E_AND(dep1, dep2)       (((dep1)<(dep2))?(dep1):(dep2))
  62 #define E_NOT(dep)              (2-(dep))
  63
  64 struct expr_value {
  65         struct expr *expr;
  66         tristate tri;
  67 };
  68
  69 #define S_VAL(sv)       ((sv).value)
  70 #define S_TRI(sv)       ((sv).tri)
  71 #define S_EQ(sv1, sv2)  (S_VAL(sv1) == S_VAL(sv2) || !strcmp(S_VAL(sv1), S_VAL(sv2)))
  72
  73 struct symbol_value {
  74         void *value;
  75         tristate tri;
  76 };
  77
  78 enum symbol_type {
  79         S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
  80 };
  81
  82 struct symbol {
  83         struct symbol *next;
  84         char *name;
  85         char *help;
  86 #ifdef CML1
  87         int type;
  88 #else
  89         enum symbol_type type;
  90 #endif
  91         struct symbol_value curr, def;
  92         tristate visible;
  93         int flags;
  94         struct property *prop;
  95         struct expr *dep, *dep2;
  96         struct menu *menu;
  97 };
  98
  99 #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)
 100
 101 #ifdef CML1
 102 #define SYMBOL_UNKNOWN          S_UNKNOWN
 103 #define SYMBOL_BOOLEAN          S_BOOLEAN
 104 #define SYMBOL_TRISTATE         S_TRISTATE
 105 #define SYMBOL_INT              S_INT
 106 #define SYMBOL_HEX              S_HEX
 107 #define SYMBOL_STRING           S_STRING
 108 #define SYMBOL_OTHER            S_OTHER
 109 #endif
 110
 111 #define SYMBOL_YES              0x0001
 112 #define SYMBOL_MOD              0x0002
 113 #define SYMBOL_NO               0x0004
 114 #define SYMBOL_CONST            0x0007
 115 #define SYMBOL_CHECK            0x0008
 116 #define SYMBOL_CHOICE           0x0010
 117 #define SYMBOL_CHOICEVAL        0x0020
 118 #define SYMBOL_PRINTED          0x0040
 119 #define SYMBOL_VALID            0x0080
 120 #define SYMBOL_OPTIONAL         0x0100
 121 #define SYMBOL_WRITE            0x0200
 122 #define SYMBOL_CHANGED          0x0400
 123 #define SYMBOL_NEW              0x0800
 124 #define SYMBOL_AUTO             0x1000
 125
 126 #define SYMBOL_MAXLENGTH        256
 127 #define SYMBOL_HASHSIZE         257
 128 #define SYMBOL_HASHMASK         0xff
 129
 130 enum prop_type {
 131         P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_ROOTMENU, P_DEFAULT, P_CHOICE
 132 };
 133
 134 struct property {
 135         struct property *next;
 136         struct symbol *sym;
 137 #ifdef CML1
 138         int token;
 139 #else
 140         enum prop_type type;
 141 #endif
 142         const char *text;
 143         struct symbol *def;
 144         struct expr_value visible;
 145         struct expr *dep;
 146         struct expr *dep2;
 147         struct menu *menu;
 148         struct file *file;
 149         int lineno;
 150 #ifdef CML1
 151         struct property *next_pos;
 152 #endif
 153 };
 154
 155 #define for_all_properties(sym, st, tok) \
 156         for (st = sym->prop; st; st = st->next) \
 157                 if (st->type == (tok))
 158 #define for_all_prompts(sym, st) for_all_properties(sym, st, P_PROMPT)
 159 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
 160 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
 161
 162 struct menu {
 163         struct menu *next;
 164         struct menu *parent;
 165         struct menu *list;
 166         struct symbol *sym;
 167         struct property *prompt;
 168         struct expr *dep;
 169         //char *help;
 170         struct file *file;
 171         int lineno;
 172         void *data;
 173 };
 174
 175 #ifndef SWIG
 176
 177 extern struct file *file_list;
 178 extern struct file *current_file;
 179 struct file *lookup_file(const char *name);
 180
 181 extern struct symbol symbol_yes, symbol_no, symbol_mod;
 182 extern struct symbol *modules_sym;
 183 extern int cdebug;
 184 extern int print_type;
 185 struct expr *expr_alloc_symbol(struct symbol *sym);
 186 #ifdef CML1
 187 struct expr *expr_alloc_one(int token, struct expr *ce);
 188 struct expr *expr_alloc_two(int token, struct expr *e1, struct expr *e2);
 189 struct expr *expr_alloc_comp(int token, struct symbol *s1, struct symbol *s2);
 190 #else
 191 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
 192 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
 193 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
 194 #endif
 195 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
 196 struct expr *expr_copy(struct expr *org);
 197 void expr_free(struct expr *e);
 198 int expr_eq(struct expr *e1, struct expr *e2);
 199 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
 200 tristate expr_calc_value(struct expr *e);
 201 struct expr *expr_eliminate_yn(struct expr *e);
 202 struct expr *expr_trans_bool(struct expr *e);
 203 struct expr *expr_eliminate_dups(struct expr *e);
 204 struct expr *expr_transform(struct expr *e);
 205 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
 206 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
 207 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
 208 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
 209 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
 210 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
 211
 212 void expr_fprint(struct expr *e, FILE *out);
 213 void print_expr(int mask, struct expr *e, int prevtoken);
 214
 215 #ifdef CML1
 216 static inline int expr_is_yes(struct expr *e)
 217 {
 218         return !e || (e->token == WORD && e->left.sym == &symbol_yes);
 219 }
 220
 221 static inline int expr_is_no(struct expr *e)
 222 {
 223         return e && (e->token == WORD && e->left.sym == &symbol_no);
 224 }
 225 #else
 226 static inline int expr_is_yes(struct expr *e)
 227 {
 228         return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
 229 }
 230
 231 static inline int expr_is_no(struct expr *e)
 232 {
 233         return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
 234 }
 235 #endif
 236 #endif
 237
 238 #ifdef __cplusplus
 239 }
 240 #endif
 241
 242 #endif /* EXPR_H */