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TOMOYO Linux Cross Reference
Linux/scripts/kconfig/expr.h

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  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 <assert.h>
 14 #include <stdio.h>
 15 #include "list.h"
 16 #ifndef __cplusplus
 17 #include <stdbool.h>
 18 #endif
 19 
 20 struct file {
 21         struct file *next;
 22         struct file *parent;
 23         const char *name;
 24         int lineno;
 25 };
 26 
 27 typedef enum tristate {
 28         no, mod, yes
 29 } tristate;
 30 
 31 enum expr_type {
 32         E_NONE, E_OR, E_AND, E_NOT,
 33         E_EQUAL, E_UNEQUAL, E_LTH, E_LEQ, E_GTH, E_GEQ,
 34         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 values are used as index to symbol.def[] */
 69 enum {
 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 
 77 struct 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 dir_dep;
 87         struct expr_value rev_dep;
 88         struct expr_value implied;
 89 };
 90 
 91 #define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
 92 
 93 #define SYMBOL_CONST      0x0001  /* symbol is const */
 94 #define SYMBOL_CHECK      0x0008  /* used during dependency checking */
 95 #define SYMBOL_CHOICE     0x0010  /* start of a choice block (null name) */
 96 #define SYMBOL_CHOICEVAL  0x0020  /* used as a value in a choice block */
 97 #define SYMBOL_VALID      0x0080  /* set when symbol.curr is calculated */
 98 #define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
 99 #define SYMBOL_WRITE      0x0200  /* write symbol to file (KCONFIG_CONFIG) */
100 #define SYMBOL_CHANGED    0x0400  /* ? */
101 #define SYMBOL_AUTO       0x1000  /* value from environment variable */
102 #define SYMBOL_CHECKED    0x2000  /* used during dependency checking */
103 #define SYMBOL_WARNED     0x8000  /* warning has been issued */
104 
105 /* Set when symbol.def[] is used */
106 #define SYMBOL_DEF        0x10000  /* First bit of SYMBOL_DEF */
107 #define SYMBOL_DEF_USER   0x10000  /* symbol.def[S_DEF_USER] is valid */
108 #define SYMBOL_DEF_AUTO   0x20000  /* symbol.def[S_DEF_AUTO] is valid */
109 #define SYMBOL_DEF3       0x40000  /* symbol.def[S_DEF_3] is valid */
110 #define SYMBOL_DEF4       0x80000  /* symbol.def[S_DEF_4] is valid */
111 
112 /* choice values need to be set before calculating this symbol value */
113 #define SYMBOL_NEED_SET_CHOICE_VALUES  0x100000
114 
115 /* Set symbol to y if allnoconfig; used for symbols that hide others */
116 #define SYMBOL_ALLNOCONFIG_Y 0x200000
117 
118 #define SYMBOL_MAXLENGTH        256
119 #define SYMBOL_HASHSIZE         9973
120 
121 /* A property represent the config options that can be associated
122  * with a config "symbol".
123  * Sample:
124  * config FOO
125  *         default y
126  *         prompt "foo prompt"
127  *         select BAR
128  * config BAZ
129  *         int "BAZ Value"
130  *         range 1..255
131  */
132 enum prop_type {
133         P_UNKNOWN,
134         P_PROMPT,   /* prompt "foo prompt" or "BAZ Value" */
135         P_COMMENT,  /* text associated with a comment */
136         P_MENU,     /* prompt associated with a menuconfig option */
137         P_DEFAULT,  /* default y */
138         P_CHOICE,   /* choice value */
139         P_SELECT,   /* select BAR */
140         P_IMPLY,    /* imply BAR */
141         P_RANGE,    /* range 7..100 (for a symbol) */
142         P_ENV,      /* value from environment variable */
143         P_SYMBOL,   /* where a symbol is defined */
144 };
145 
146 struct property {
147         struct property *next;     /* next property - null if last */
148         struct symbol *sym;        /* the symbol for which the property is associated */
149         enum prop_type type;       /* type of property */
150         const char *text;          /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
151         struct expr_value visible;
152         struct expr *expr;         /* the optional conditional part of the property */
153         struct menu *menu;         /* the menu the property are associated with
154                                     * valid for: P_SELECT, P_RANGE, P_CHOICE,
155                                     * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
156         struct file *file;         /* what file was this property defined */
157         int lineno;                /* what lineno was this property defined */
158 };
159 
160 #define for_all_properties(sym, st, tok) \
161         for (st = sym->prop; st; st = st->next) \
162                 if (st->type == (tok))
163 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
164 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
165 #define for_all_prompts(sym, st) \
166         for (st = sym->prop; st; st = st->next) \
167                 if (st->text)
168 
169 struct menu {
170         struct menu *next;
171         struct menu *parent;
172         struct menu *list;
173         struct symbol *sym;
174         struct property *prompt;
175         struct expr *visibility;
176         struct expr *dep;
177         unsigned int flags;
178         char *help;
179         struct file *file;
180         int lineno;
181         void *data;
182 };
183 
184 #define MENU_CHANGED            0x0001
185 #define MENU_ROOT               0x0002
186 
187 struct jump_key {
188         struct list_head entries;
189         size_t offset;
190         struct menu *target;
191         int index;
192 };
193 
194 #define JUMP_NB                 9
195 
196 extern struct file *file_list;
197 extern struct file *current_file;
198 struct file *lookup_file(const char *name);
199 
200 extern struct symbol symbol_yes, symbol_no, symbol_mod;
201 extern struct symbol *modules_sym;
202 extern struct symbol *sym_defconfig_list;
203 extern int cdebug;
204 struct expr *expr_alloc_symbol(struct symbol *sym);
205 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
206 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
207 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
208 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
209 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
210 struct expr *expr_copy(const struct expr *org);
211 void expr_free(struct expr *e);
212 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
213 tristate expr_calc_value(struct expr *e);
214 struct expr *expr_trans_bool(struct expr *e);
215 struct expr *expr_eliminate_dups(struct expr *e);
216 struct expr *expr_transform(struct expr *e);
217 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
218 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
219 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
220 struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
221 
222 void expr_fprint(struct expr *e, FILE *out);
223 struct gstr; /* forward */
224 void expr_gstr_print(struct expr *e, struct gstr *gs);
225 
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 
236 #ifdef __cplusplus
237 }
238 #endif
239 
240 #endif /* EXPR_H */
241 

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