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
29 typedef enum tristate {
30 no, mod, yes
31 } tristate;
32
33 enum expr_type {
34 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
35 };
36
37 union expr_data {
38 struct expr *expr;
39 struct symbol *sym;
40 };
41
42 struct expr {
43 enum expr_type type;
44 union expr_data left, right;
45 };
46
47 #define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
48 #define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
49 #define EXPR_NOT(dep) (2-(dep))
50
51 #define expr_list_for_each_sym(l, e, s) \
52 for (e = (l); e && (s = e->right.sym); e = e->left.expr)
53
54 struct expr_value {
55 struct expr *expr;
56 tristate tri;
57 };
58
59 struct symbol_value {
60 void *val;
61 tristate tri;
62 };
63
64 enum symbol_type {
65 S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
66 };
67
68 /* enum values are used as index to symbol.def[] */
69 enum {
70 S_DEF_USER, /* main user value */
71 S_DEF_AUTO, /* values read from auto.conf */
72 S_DEF_DEF3, /* Reserved for UI usage */
73 S_DEF_DEF4, /* Reserved for UI usage */
74 S_DEF_COUNT
75 };
76
77 struct symbol {
78 struct symbol *next;
79 char *name;
80 enum symbol_type type;
81 struct symbol_value curr;
82 struct symbol_value def[S_DEF_COUNT];
83 tristate visible;
84 int flags;
85 struct property *prop;
86 struct expr_value rev_dep;
87 };
88
89 #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)
90
91 #define SYMBOL_CONST 0x0001 /* symbol is const */
92 #define SYMBOL_CHECK 0x0008 /* used during dependency checking */
93 #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
94 #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
95 #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
96 #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
97 #define SYMBOL_WRITE 0x0200 /* ? */
98 #define SYMBOL_CHANGED 0x0400 /* ? */
99 #define SYMBOL_AUTO 0x1000 /* value from environment variable */
100 #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
101 #define SYMBOL_WARNED 0x8000 /* warning has been issued */
102
103 /* Set when symbol.def[] is used */
104 #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
105 #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
106 #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
107 #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
108 #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
109
110 #define SYMBOL_MAXLENGTH 256
111 #define SYMBOL_HASHSIZE 257
112 #define SYMBOL_HASHMASK 0xff
113
114 /* A property represent the config options that can be associated
115 * with a config "symbol".
116 * Sample:
117 * config FOO
118 * default y
119 * prompt "foo prompt"
120 * select BAR
121 * config BAZ
122 * int "BAZ Value"
123 * range 1..255
124 */
125 enum prop_type {
126 P_UNKNOWN,
127 P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
128 P_COMMENT, /* text associated with a comment */
129 P_MENU, /* prompt associated with a menuconfig option */
130 P_DEFAULT, /* default y */
131 P_CHOICE, /* choice value */
132 P_SELECT, /* select BAR */
133 P_RANGE, /* range 7..100 (for a symbol) */
134 P_ENV, /* value from environment variable */
135 };
136
137 struct property {
138 struct property *next; /* next property - null if last */
139 struct symbol *sym; /* the symbol for which the property is associated */
140 enum prop_type type; /* type of property */
141 const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
142 struct expr_value visible;
143 struct expr *expr; /* the optional conditional part of the property */
144 struct menu *menu; /* the menu the property are associated with
145 * valid for: P_SELECT, P_RANGE, P_CHOICE,
146 * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
147 struct file *file; /* what file was this property defined */
148 int lineno; /* what lineno was this property defined */
149 };
150
151 #define for_all_properties(sym, st, tok) \
152 for (st = sym->prop; st; st = st->next) \
153 if (st->type == (tok))
154 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
155 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
156 #define for_all_prompts(sym, st) \
157 for (st = sym->prop; st; st = st->next) \
158 if (st->text)
159
160 struct menu {
161 struct menu *next;
162 struct menu *parent;
163 struct menu *list;
164 struct symbol *sym;
165 struct property *prompt;
166 struct expr *dep;
167 unsigned int flags;
168 char *help;
169 struct file *file;
170 int lineno;
171 void *data;
172 };
173
174 #define MENU_CHANGED 0x0001
175 #define MENU_ROOT 0x0002
176
177 #ifndef SWIG
178
179 extern struct file *file_list;
180 extern struct file *current_file;
181 struct file *lookup_file(const char *name);
182
183 extern struct symbol symbol_yes, symbol_no, symbol_mod;
184 extern struct symbol *modules_sym;
185 extern struct symbol *sym_defconfig_list;
186 extern int cdebug;
187 struct expr *expr_alloc_symbol(struct symbol *sym);
188 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
189 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
190 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
191 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
192 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
193 struct expr *expr_copy(struct expr *org);
194 void expr_free(struct expr *e);
195 int expr_eq(struct expr *e1, struct expr *e2);
196 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
197 tristate expr_calc_value(struct expr *e);
198 struct expr *expr_eliminate_yn(struct expr *e);
199 struct expr *expr_trans_bool(struct expr *e);
200 struct expr *expr_eliminate_dups(struct expr *e);
201 struct expr *expr_transform(struct expr *e);
202 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
203 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
204 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
205 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
206 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
207 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
208
209 void expr_fprint(struct expr *e, FILE *out);
210 struct gstr; /* forward */
211 void expr_gstr_print(struct expr *e, struct gstr *gs);
212
expr_is_yes(struct expr * e)213 static inline int expr_is_yes(struct expr *e)
214 {
215 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
216 }
217
expr_is_no(struct expr * e)218 static inline int expr_is_no(struct expr *e)
219 {
220 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
221 }
222 #endif
223
224 #ifdef __cplusplus
225 }
226 #endif
227
228 #endif /* EXPR_H */
229