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