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 enum {
67 S_DEF_USER, /* main user value */
68 S_DEF_AUTO,
69 };
70
71 struct symbol {
72 struct symbol *next;
73 char *name;
74 char *help;
75 enum symbol_type type;
76 struct symbol_value curr;
77 struct symbol_value def[4];
78 tristate visible;
79 int flags;
80 struct property *prop;
81 struct expr *dep, *dep2;
82 struct expr_value rev_dep;
83 };
84
85 #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)
86
87 #define SYMBOL_CONST 0x0001
88 #define SYMBOL_CHECK 0x0008
89 #define SYMBOL_CHOICE 0x0010
90 #define SYMBOL_CHOICEVAL 0x0020
91 #define SYMBOL_PRINTED 0x0040
92 #define SYMBOL_VALID 0x0080
93 #define SYMBOL_OPTIONAL 0x0100
94 #define SYMBOL_WRITE 0x0200
95 #define SYMBOL_CHANGED 0x0400
96 #define SYMBOL_AUTO 0x1000
97 #define SYMBOL_CHECKED 0x2000
98 #define SYMBOL_WARNED 0x8000
99 #define SYMBOL_DEF 0x10000
100 #define SYMBOL_DEF_USER 0x10000
101 #define SYMBOL_DEF_AUTO 0x20000
102 #define SYMBOL_DEF3 0x40000
103 #define SYMBOL_DEF4 0x80000
104
105 #define SYMBOL_MAXLENGTH 256
106 #define SYMBOL_HASHSIZE 257
107 #define SYMBOL_HASHMASK 0xff
108
109 enum prop_type {
110 P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
111 };
112
113 struct property {
114 struct property *next;
115 struct symbol *sym;
116 enum prop_type type;
117 const char *text;
118 struct expr_value visible;
119 struct expr *expr;
120 struct menu *menu;
121 struct file *file;
122 int lineno;
123 };
124
125 #define for_all_properties(sym, st, tok) \
126 for (st = sym->prop; st; st = st->next) \
127 if (st->type == (tok))
128 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
129 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
130 #define for_all_prompts(sym, st) \
131 for (st = sym->prop; st; st = st->next) \
132 if (st->text)
133
134 struct menu {
135 struct menu *next;
136 struct menu *parent;
137 struct menu *list;
138 struct symbol *sym;
139 struct property *prompt;
140 struct expr *dep;
141 unsigned int flags;
142 //char *help;
143 struct file *file;
144 int lineno;
145 void *data;
146 };
147
148 #define MENU_CHANGED 0x0001
149 #define MENU_ROOT 0x0002
150
151 #ifndef SWIG
152
153 extern struct file *file_list;
154 extern struct file *current_file;
155 struct file *lookup_file(const char *name);
156
157 extern struct symbol symbol_yes, symbol_no, symbol_mod;
158 extern struct symbol *modules_sym;
159 extern struct symbol *sym_defconfig_list;
160 extern int cdebug;
161 struct expr *expr_alloc_symbol(struct symbol *sym);
162 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
163 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
164 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
165 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
166 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
167 struct expr *expr_copy(struct expr *org);
168 void expr_free(struct expr *e);
169 int expr_eq(struct expr *e1, struct expr *e2);
170 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
171 tristate expr_calc_value(struct expr *e);
172 struct expr *expr_eliminate_yn(struct expr *e);
173 struct expr *expr_trans_bool(struct expr *e);
174 struct expr *expr_eliminate_dups(struct expr *e);
175 struct expr *expr_transform(struct expr *e);
176 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
177 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
178 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
179 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
180 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
181 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
182
183 void expr_fprint(struct expr *e, FILE *out);
184 struct gstr; /* forward */
185 void expr_gstr_print(struct expr *e, struct gstr *gs);
186
expr_is_yes(struct expr * e)187 static inline int expr_is_yes(struct expr *e)
188 {
189 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
190 }
191
expr_is_no(struct expr * e)192 static inline int expr_is_no(struct expr *e)
193 {
194 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
195 }
196 #endif
197
198 #ifdef __cplusplus
199 }
200 #endif
201
202 #endif /* EXPR_H */
203