xref: /openbmc/linux/scripts/kconfig/expr.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
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_CHECK_DONE	0x4000
97 #define SYMBOL_WARNED		0x8000
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 */
196