force a config reset when the user changes the target platform in menuconfig
[openwrt/svn-archive/archive.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 <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 struct symbol {
67 struct symbol *next;
68 char *name;
69 char *help;
70 enum symbol_type type;
71 struct symbol_value curr, user;
72 tristate visible;
73 int flags;
74 struct property *prop;
75 struct expr *dep, *dep2;
76 struct expr_value rev_dep;
77 };
78
79 #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)
80
81 #define SYMBOL_YES 0x0001
82 #define SYMBOL_MOD 0x0002
83 #define SYMBOL_NO 0x0004
84 #define SYMBOL_CONST 0x0007
85 #define SYMBOL_CHECK 0x0008
86 #define SYMBOL_CHOICE 0x0010
87 #define SYMBOL_CHOICEVAL 0x0020
88 #define SYMBOL_PRINTED 0x0040
89 #define SYMBOL_VALID 0x0080
90 #define SYMBOL_OPTIONAL 0x0100
91 #define SYMBOL_WRITE 0x0200
92 #define SYMBOL_CHANGED 0x0400
93 #define SYMBOL_NEW 0x0800
94 #define SYMBOL_AUTO 0x1000
95 #define SYMBOL_CHECKED 0x2000
96 #define SYMBOL_WARNED 0x8000
97 #define SYMBOL_RESET 0x10000
98
99 #define SYMBOL_MAXLENGTH 256
100 #define SYMBOL_HASHSIZE 257
101 #define SYMBOL_HASHMASK 0xff
102
103 enum prop_type {
104 P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
105 };
106
107 struct property {
108 struct property *next;
109 struct symbol *sym;
110 enum prop_type type;
111 const char *text;
112 struct expr_value visible;
113 struct expr *expr;
114 struct menu *menu;
115 struct file *file;
116 int lineno;
117 };
118
119 #define for_all_properties(sym, st, tok) \
120 for (st = sym->prop; st; st = st->next) \
121 if (st->type == (tok))
122 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
123 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
124 #define for_all_prompts(sym, st) \
125 for (st = sym->prop; st; st = st->next) \
126 if (st->text)
127
128 struct menu {
129 struct menu *next;
130 struct menu *parent;
131 struct menu *list;
132 struct symbol *sym;
133 struct property *prompt;
134 struct expr *dep;
135 unsigned int flags;
136 //char *help;
137 struct file *file;
138 int lineno;
139 void *data;
140 };
141
142 #define MENU_CHANGED 0x0001
143 #define MENU_ROOT 0x0002
144
145 #ifndef SWIG
146
147 extern struct file *file_list;
148 extern struct file *current_file;
149 struct file *lookup_file(const char *name);
150
151 extern struct symbol symbol_yes, symbol_no, symbol_mod;
152 extern struct symbol *modules_sym;
153 extern int cdebug;
154 struct expr *expr_alloc_symbol(struct symbol *sym);
155 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
156 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
157 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
158 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
159 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
160 struct expr *expr_copy(struct expr *org);
161 void expr_free(struct expr *e);
162 int expr_eq(struct expr *e1, struct expr *e2);
163 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
164 tristate expr_calc_value(struct expr *e);
165 struct expr *expr_eliminate_yn(struct expr *e);
166 struct expr *expr_trans_bool(struct expr *e);
167 struct expr *expr_eliminate_dups(struct expr *e);
168 struct expr *expr_transform(struct expr *e);
169 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
170 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
171 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
172 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
173 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
174 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
175
176 void expr_fprint(struct expr *e, FILE *out);
177 struct gstr; /* forward */
178 void expr_gstr_print(struct expr *e, struct gstr *gs);
179
180 static inline int expr_is_yes(struct expr *e)
181 {
182 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
183 }
184
185 static inline int expr_is_no(struct expr *e)
186 {
187 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
188 }
189 #endif
190
191 #ifdef __cplusplus
192 }
193 #endif
194
195 #endif /* EXPR_H */