kernel: add missing symbol for 4.4
[openwrt/openwrt.git] / scripts / 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 <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, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
33 };
34
35 union expr_data {
36 struct expr *expr;
37 struct symbol *sym;
38 };
39
40 struct expr {
41 enum expr_type type;
42 union expr_data left, right;
43 };
44
45 #define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
46 #define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
47 #define EXPR_NOT(dep) (2-(dep))
48
49 #define expr_list_for_each_sym(l, e, s) \
50 for (e = (l); e && (s = e->right.sym); e = e->left.expr)
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 values are used as index to symbol.def[] */
67 enum {
68 S_DEF_USER, /* main user value */
69 S_DEF_AUTO, /* values read from auto.conf */
70 S_DEF_DEF3, /* Reserved for UI usage */
71 S_DEF_DEF4, /* Reserved for UI usage */
72 S_DEF_COUNT
73 };
74
75 struct symbol {
76 struct symbol *next;
77 char *name;
78 enum symbol_type type;
79 struct symbol_value curr;
80 struct symbol_value def[S_DEF_COUNT];
81 tristate visible;
82 int flags;
83 struct property *prop;
84 struct expr_value dir_dep;
85 struct expr_value rev_dep;
86 };
87
88 #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)
89
90 #define SYMBOL_CONST 0x0001 /* symbol is const */
91 #define SYMBOL_CHECK 0x0008 /* used during dependency checking */
92 #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
93 #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
94 #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
95 #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
96 #define SYMBOL_WRITE 0x0200 /* write symbol to file (KCONFIG_CONFIG) */
97 #define SYMBOL_CHANGED 0x0400 /* ? */
98 #define SYMBOL_AUTO 0x1000 /* value from environment variable */
99 #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
100 #define SYMBOL_WARNED 0x8000 /* warning has been issued */
101
102 /* Set when symbol.def[] is used */
103 #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
104 #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
105 #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
106 #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
107 #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
108
109 /* choice values need to be set before calculating this symbol value */
110 #define SYMBOL_NEED_SET_CHOICE_VALUES 0x100000
111
112 /* Set symbol to y if allnoconfig; used for symbols that hide others */
113 #define SYMBOL_ALLNOCONFIG_Y 0x200000
114
115 #define SYMBOL_MAXLENGTH 256
116 #define SYMBOL_HASHSIZE 9973
117
118 /* A property represent the config options that can be associated
119 * with a config "symbol".
120 * Sample:
121 * config FOO
122 * default y
123 * prompt "foo prompt"
124 * select BAR
125 * config BAZ
126 * int "BAZ Value"
127 * range 1..255
128 */
129 enum prop_type {
130 P_UNKNOWN,
131 P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
132 P_COMMENT, /* text associated with a comment */
133 P_MENU, /* prompt associated with a menuconfig option */
134 P_DEFAULT, /* default y */
135 P_CHOICE, /* choice value */
136 P_SELECT, /* select BAR */
137 P_RANGE, /* range 7..100 (for a symbol) */
138 P_ENV, /* value from environment variable */
139 P_SYMBOL, /* where a symbol is defined */
140 P_RESET, /* reset to defaults condition */
141 };
142
143 struct property {
144 struct property *next; /* next property - null if last */
145 struct symbol *sym; /* the symbol for which the property is associated */
146 enum prop_type type; /* type of property */
147 const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
148 struct expr_value visible;
149 struct expr *expr; /* the optional conditional part of the property */
150 struct menu *menu; /* the menu the property are associated with
151 * valid for: P_SELECT, P_RANGE, P_CHOICE,
152 * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
153 struct file *file; /* what file was this property defined */
154 int lineno; /* what lineno was this property defined */
155 };
156
157 #define for_all_properties(sym, st, tok) \
158 for (st = sym->prop; st; st = st->next) \
159 if (st->type == (tok))
160 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
161 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
162 #define for_all_prompts(sym, st) \
163 for (st = sym->prop; st; st = st->next) \
164 if (st->text)
165
166 struct menu {
167 struct menu *next;
168 struct menu *parent;
169 struct menu *list;
170 struct symbol *sym;
171 struct property *prompt;
172 struct expr *visibility;
173 struct expr *dep;
174 unsigned int flags;
175 char *help;
176 struct file *file;
177 int lineno;
178 void *data;
179 };
180
181 #define MENU_CHANGED 0x0001
182 #define MENU_ROOT 0x0002
183
184 struct jump_key {
185 struct list_head entries;
186 size_t offset;
187 struct menu *target;
188 int index;
189 };
190
191 #define JUMP_NB 9
192
193 extern struct file *file_list;
194 extern struct file *current_file;
195 struct file *lookup_file(const char *name);
196
197 extern struct symbol symbol_yes, symbol_no, symbol_mod;
198 extern struct symbol *modules_sym;
199 extern struct symbol *sym_defconfig_list;
200 extern int cdebug;
201 struct expr *expr_alloc_symbol(struct symbol *sym);
202 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
203 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
204 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
205 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
206 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
207 struct expr *expr_copy(const struct expr *org);
208 void expr_free(struct expr *e);
209 int expr_eq(struct expr *e1, struct expr *e2);
210 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
211 tristate expr_calc_value(struct expr *e);
212 struct expr *expr_eliminate_yn(struct expr *e);
213 struct expr *expr_trans_bool(struct expr *e);
214 struct expr *expr_eliminate_dups(struct expr *e);
215 struct expr *expr_transform(struct expr *e);
216 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
217 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
218 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
219 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
220 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
221 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
222 struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
223
224 void expr_fprint(struct expr *e, FILE *out);
225 struct gstr; /* forward */
226 void expr_gstr_print(struct expr *e, struct gstr *gs);
227
228 static inline int expr_is_yes(struct expr *e)
229 {
230 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
231 }
232
233 static inline int expr_is_no(struct expr *e)
234 {
235 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
236 }
237
238 #ifdef __cplusplus
239 }
240 #endif
241
242 #endif /* EXPR_H */