1
2
3
4
5
6#ifndef EXPR_H
7#define EXPR_H
8
9#ifdef __cplusplus
10extern "C" {
11#endif
12
13#include <stdio.h>
14#ifndef __cplusplus
15#include <stdbool.h>
16#endif
17
18struct 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
30typedef enum tristate {
31 no, mod, yes
32} tristate;
33
34enum expr_type {
35 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
36};
37
38union expr_data {
39 struct expr *expr;
40 struct symbol *sym;
41};
42
43struct 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
52struct expr_value {
53 struct expr *expr;
54 tristate tri;
55};
56
57struct symbol_value {
58 void *val;
59 tristate tri;
60};
61
62enum symbol_type {
63 S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
64};
65
66enum {
67 S_DEF_USER,
68 S_DEF_AUTO,
69};
70
71struct 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
109enum prop_type {
110 P_UNKNOWN, P_PROMPT, P_COMMENT, P_MENU, P_DEFAULT, P_CHOICE, P_SELECT, P_RANGE
111};
112
113struct 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
134struct 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
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
153extern struct file *file_list;
154extern struct file *current_file;
155struct file *lookup_file(const char *name);
156
157extern struct symbol symbol_yes, symbol_no, symbol_mod;
158extern struct symbol *modules_sym;
159extern struct symbol *sym_defconfig_list;
160extern int cdebug;
161struct expr *expr_alloc_symbol(struct symbol *sym);
162struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
163struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
164struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
165struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
166struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
167struct expr *expr_copy(struct expr *org);
168void expr_free(struct expr *e);
169int expr_eq(struct expr *e1, struct expr *e2);
170void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
171tristate expr_calc_value(struct expr *e);
172struct expr *expr_eliminate_yn(struct expr *e);
173struct expr *expr_trans_bool(struct expr *e);
174struct expr *expr_eliminate_dups(struct expr *e);
175struct expr *expr_transform(struct expr *e);
176int expr_contains_symbol(struct expr *dep, struct symbol *sym);
177bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
178struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
179struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
180void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
181struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
182
183void expr_fprint(struct expr *e, FILE *out);
184struct gstr;
185void expr_gstr_print(struct expr *e, struct gstr *gs);
186
187static inline int expr_is_yes(struct expr *e)
188{
189 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
190}
191
192static 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
203
