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4
5
6#ifndef EXPR_H
7#define EXPR_H
8
9#ifdef __cplusplus
10extern "C" {
11#endif
12
13#include <assert.h>
14#include <stdio.h>
15#ifndef __cplusplus
16#include <stdbool.h>
17#endif
18
19struct file {
20 struct file *next;
21 struct file *parent;
22 const char *name;
23 int lineno;
24};
25
26typedef enum tristate {
27 no, mod, yes
28} tristate;
29
30enum expr_type {
31 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
32};
33
34union expr_data {
35 struct expr *expr;
36 struct symbol *sym;
37};
38
39struct expr {
40 enum expr_type type;
41 union expr_data left, right;
42};
43
44#define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
45#define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
46#define EXPR_NOT(dep) (2-(dep))
47
48#define expr_list_for_each_sym(l, e, s) \
49 for (e = (l); e && (s = e->right.sym); e = e->left.expr)
50
51struct expr_value {
52 struct expr *expr;
53 tristate tri;
54};
55
56struct symbol_value {
57 void *val;
58 tristate tri;
59};
60
61enum symbol_type {
62 S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
63};
64
65
66enum {
67 S_DEF_USER,
68 S_DEF_AUTO,
69 S_DEF_DEF3,
70 S_DEF_DEF4,
71 S_DEF_COUNT
72};
73
74struct symbol {
75 struct symbol *next;
76 char *name;
77 enum symbol_type type;
78 struct symbol_value curr;
79 struct symbol_value def[S_DEF_COUNT];
80 tristate visible;
81 int flags;
82 struct property *prop;
83 struct expr_value dir_dep;
84 struct expr_value rev_dep;
85};
86
87#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)
88
89#define SYMBOL_CONST 0x0001
90#define SYMBOL_CHECK 0x0008
91#define SYMBOL_CHOICE 0x0010
92#define SYMBOL_CHOICEVAL 0x0020
93#define SYMBOL_VALID 0x0080
94#define SYMBOL_OPTIONAL 0x0100
95#define SYMBOL_WRITE 0x0200
96#define SYMBOL_CHANGED 0x0400
97#define SYMBOL_AUTO 0x1000
98#define SYMBOL_CHECKED 0x2000
99#define SYMBOL_WARNED 0x8000
100
101
102#define SYMBOL_DEF 0x10000
103#define SYMBOL_DEF_USER 0x10000
104#define SYMBOL_DEF_AUTO 0x20000
105#define SYMBOL_DEF3 0x40000
106#define SYMBOL_DEF4 0x80000
107
108#define SYMBOL_MAXLENGTH 256
109#define SYMBOL_HASHSIZE 9973
110
111
112
113
114
115
116
117
118
119
120
121
122enum prop_type {
123 P_UNKNOWN,
124 P_PROMPT,
125 P_COMMENT,
126 P_MENU,
127 P_DEFAULT,
128 P_CHOICE,
129 P_SELECT,
130 P_RANGE,
131 P_ENV,
132 P_SYMBOL,
133};
134
135struct property {
136 struct property *next;
137 struct symbol *sym;
138 enum prop_type type;
139 const char *text;
140 struct expr_value visible;
141 struct expr *expr;
142 struct menu *menu;
143
144
145 struct file *file;
146 int lineno;
147};
148
149#define for_all_properties(sym, st, tok) \
150 for (st = sym->prop; st; st = st->next) \
151 if (st->type == (tok))
152#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
153#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
154#define for_all_prompts(sym, st) \
155 for (st = sym->prop; st; st = st->next) \
156 if (st->text)
157
158struct menu {
159 struct menu *next;
160 struct menu *parent;
161 struct menu *list;
162 struct symbol *sym;
163 struct property *prompt;
164 struct expr *visibility;
165 struct expr *dep;
166 unsigned int flags;
167 char *help;
168 struct file *file;
169 int lineno;
170 void *data;
171};
172
173#define MENU_CHANGED 0x0001
174#define MENU_ROOT 0x0002
175
176extern struct file *file_list;
177extern struct file *current_file;
178struct file *lookup_file(const char *name);
179
180extern struct symbol symbol_yes, symbol_no, symbol_mod;
181extern struct symbol *modules_sym;
182extern struct symbol *sym_defconfig_list;
183extern int cdebug;
184struct expr *expr_alloc_symbol(struct symbol *sym);
185struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
186struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
187struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
188struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
189struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
190struct expr *expr_copy(const struct expr *org);
191void expr_free(struct expr *e);
192int expr_eq(struct expr *e1, struct expr *e2);
193void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
194tristate expr_calc_value(struct expr *e);
195struct expr *expr_eliminate_yn(struct expr *e);
196struct expr *expr_trans_bool(struct expr *e);
197struct expr *expr_eliminate_dups(struct expr *e);
198struct expr *expr_transform(struct expr *e);
199int expr_contains_symbol(struct expr *dep, struct symbol *sym);
200bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
201struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
202struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
203void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
204struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
205struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
206
207void expr_fprint(struct expr *e, FILE *out);
208struct gstr;
209void expr_gstr_print(struct expr *e, struct gstr *gs);
210
211static inline int expr_is_yes(struct expr *e)
212{
213 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
214}
215
216static inline int expr_is_no(struct expr *e)
217{
218 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
219}
220
221#ifdef __cplusplus
222}
223#endif
224
225#endif
226