rtai-core/config/kconfig/expr.h

00001 /*
00002  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
00003  * Released under the terms of the GNU GPL v2.0.
00004  */
00005 
00006 #ifndef EXPR_H
00007 #define EXPR_H
00008 
00009 #ifdef __cplusplus
00010 extern "C" {
00011 #endif
00012 
00013 #include <stdio.h>
00014 #ifndef __cplusplus
00015 #include <stdbool.h>
00016 #endif
00017 
00018 struct file {
00019         struct file *next;
00020         struct file *parent;
00021         char *name;
00022         int lineno;
00023         int flags;
00024 };
00025 
00026 #define FILE_BUSY               0x0001
00027 #define FILE_SCANNED            0x0002
00028 #define FILE_PRINTED            0x0004
00029 
00030 typedef enum tristate {
00031         no, mod, yes
00032 } tristate;
00033 
00034 enum expr_type {
00035         E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
00036 };
00037 
00038 union expr_data {
00039         struct expr *expr;
00040         struct symbol *sym;
00041 };
00042 
00043 struct expr {
00044         enum expr_type type;
00045         union expr_data left, right;
00046 };
00047 
00048 #define E_OR(dep1, dep2)        (((dep1)>(dep2))?(dep1):(dep2))
00049 #define E_AND(dep1, dep2)       (((dep1)<(dep2))?(dep1):(dep2))
00050 #define E_NOT(dep)              (2-(dep))
00051 
00052 struct expr_value {
00053         struct expr *expr;
00054         tristate tri;
00055 };
00056 
00057 struct symbol_value {
00058         void *val;
00059         tristate tri;
00060 };
00061 
00062 enum symbol_type {
00063         S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
00064 };
00065 
00066 struct symbol {
00067         struct symbol *next;
00068         char *name;
00069         char *help;
00070         enum symbol_type type;
00071         struct symbol_value curr, user;
00072         tristate visible;
00073         int flags;
00074         struct property *prop;
00075         struct expr *dep, *dep2;
00076         struct expr_value rev_dep;
00077 };
00078 
00079 #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)
00080 
00081 #define SYMBOL_YES              0x0001
00082 #define SYMBOL_MOD              0x0002
00083 #define SYMBOL_NO               0x0004
00084 #define SYMBOL_CONST            0x0007
00085 #define SYMBOL_CHECK            0x0008
00086 #define SYMBOL_CHOICE           0x0010
00087 #define SYMBOL_CHOICEVAL        0x0020
00088 #define SYMBOL_PRINTED          0x0040
00089 #define SYMBOL_VALID            0x0080
00090 #define SYMBOL_OPTIONAL         0x0100
00091 #define SYMBOL_WRITE            0x0200
00092 #define SYMBOL_CHANGED          0x0400
00093 #define SYMBOL_NEW              0x0800
00094 #define SYMBOL_AUTO             0x1000
00095 #define SYMBOL_CHECKED          0x2000
00096 #define SYMBOL_CHECK_DONE       0x4000
00097 #define SYMBOL_WARNED           0x8000
00098 
00099 #define SYMBOL_MAXLENGTH        256
00100 #define SYMBOL_HASHSIZE         257
00101 #define SYMBOL_HASHMASK         0xff
00102 
00103 enum prop_type {
00104         P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
00105 };
00106 
00107 struct property {
00108         struct property *next;
00109         struct symbol *sym;
00110         enum prop_type type;
00111         const char *text;
00112         struct expr_value visible;
00113         struct expr *expr;
00114         struct menu *menu;
00115         struct file *file;
00116         int lineno;
00117 };
00118 
00119 #define for_all_properties(sym, st, tok) \
00120         for (st = sym->prop; st; st = st->next) \
00121                 if (st->type == (tok))
00122 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
00123 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
00124 #define for_all_prompts(sym, st) \
00125         for (st = sym->prop; st; st = st->next) \
00126                 if (st->text)
00127 
00128 struct menu {
00129         struct menu *next;
00130         struct menu *parent;
00131         struct menu *list;
00132         struct symbol *sym;
00133         struct property *prompt;
00134         struct expr *dep;
00135         unsigned int flags;
00136         //char *help;
00137         struct file *file;
00138         int lineno;
00139         void *data;
00140 };
00141 
00142 #define MENU_CHANGED            0x0001
00143 #define MENU_ROOT               0x0002
00144 
00145 #ifndef SWIG
00146 
00147 extern struct file *file_list;
00148 extern struct file *current_file;
00149 struct file *lookup_file(const char *name);
00150 
00151 extern struct symbol symbol_yes, symbol_no, symbol_mod;
00152 extern struct symbol *modules_sym;
00153 extern int cdebug;
00154 struct expr *expr_alloc_symbol(struct symbol *sym);
00155 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
00156 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
00157 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
00158 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
00159 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
00160 struct expr *expr_copy(struct expr *org);
00161 void expr_free(struct expr *e);
00162 int expr_eq(struct expr *e1, struct expr *e2);
00163 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
00164 tristate expr_calc_value(struct expr *e);
00165 struct expr *expr_eliminate_yn(struct expr *e);
00166 struct expr *expr_trans_bool(struct expr *e);
00167 struct expr *expr_eliminate_dups(struct expr *e);
00168 struct expr *expr_transform(struct expr *e);
00169 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
00170 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
00171 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
00172 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
00173 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
00174 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
00175 
00176 void expr_fprint(struct expr *e, FILE *out);
00177 void print_expr(int mask, struct expr *e, int prevtoken);
00178 
00179 static inline int expr_is_yes(struct expr *e)
00180 {
00181         return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
00182 }
00183 
00184 static inline int expr_is_no(struct expr *e)
00185 {
00186         return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
00187 }
00188 #endif
00189 
00190 #ifdef __cplusplus
00191 }
00192 #endif
00193 
00194 #endif /* EXPR_H */

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