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 <assert.h>
14 #include <stdio.h>
15 #include "list.h"
16 #ifndef __cplusplus
17 #include <stdbool.h>
18 #endif
19
20 struct file {
21 struct file *next;
22 struct file *parent;
23 const char *name;
24 int lineno;
25 };
26
27 typedef enum tristate {
28 no, mod, yes
29 } tristate;
30
31 enum expr_type {
32 E_NONE, E_OR, E_AND, E_NOT,
33 E_EQUAL, E_UNEQUAL, E_LTH, E_LEQ, E_GTH, E_GEQ,
34 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 dir_dep;
87 struct expr_value rev_dep;
88 };
89
90 #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)
91
92 #define SYMBOL_CONST 0x0001 /* symbol is const */
93 #define SYMBOL_CHECK 0x0008 /* used during dependency checking */
94 #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
95 #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
96 #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
97 #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
98 #define SYMBOL_WRITE 0x0200 /* write symbol to file (KCONFIG_CONFIG) */
99 #define SYMBOL_CHANGED 0x0400 /* ? */
100 #define SYMBOL_AUTO 0x1000 /* value from environment variable */
101 #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
102 #define SYMBOL_WARNED 0x8000 /* warning has been issued */
103
104 /* Set when symbol.def[] is used */
105 #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
106 #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
107 #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
108 #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
109 #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
110
111 /* choice values need to be set before calculating this symbol value */
112 #define SYMBOL_NEED_SET_CHOICE_VALUES 0x100000
113
114 /* Set symbol to y if allnoconfig; used for symbols that hide others */
115 #define SYMBOL_ALLNOCONFIG_Y 0x200000
116
117 #define SYMBOL_MAXLENGTH 256
118 #define SYMBOL_HASHSIZE 9973
119
120 /* A property represent the config options that can be associated
121 * with a config "symbol".
122 * Sample:
123 * config FOO
124 * default y
125 * prompt "foo prompt"
126 * select BAR
127 * config BAZ
128 * int "BAZ Value"
129 * range 1..255
130 */
131 enum prop_type {
132 P_UNKNOWN,
133 P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
134 P_COMMENT, /* text associated with a comment */
135 P_MENU, /* prompt associated with a menuconfig option */
136 P_DEFAULT, /* default y */
137 P_CHOICE, /* choice value */
138 P_SELECT, /* select BAR */
139 P_RANGE, /* range 7..100 (for a symbol) */
140 P_ENV, /* value from environment variable */
141 P_SYMBOL, /* where a symbol is defined */
142 };
143
144 struct property {
145 struct property *next; /* next property - null if last */
146 struct symbol *sym; /* the symbol for which the property is associated */
147 enum prop_type type; /* type of property */
148 const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
149 struct expr_value visible;
150 struct expr *expr; /* the optional conditional part of the property */
151 struct menu *menu; /* the menu the property are associated with
152 * valid for: P_SELECT, P_RANGE, P_CHOICE,
153 * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
154 struct file *file; /* what file was this property defined */
155 int lineno; /* what lineno was this property defined */
156 };
157
158 #define for_all_properties(sym, st, tok) \
159 for (st = sym->prop; st; st = st->next) \
160 if (st->type == (tok))
161 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
162 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
163 #define for_all_prompts(sym, st) \
164 for (st = sym->prop; st; st = st->next) \
165 if (st->text)
166
167 struct menu {
168 struct menu *next;
169 struct menu *parent;
170 struct menu *list;
171 struct symbol *sym;
172 struct property *prompt;
173 struct expr *visibility;
174 struct expr *dep;
175 unsigned int flags;
176 char *help;
177 struct file *file;
178 int lineno;
179 void *data;
180 };
181
182 #define MENU_CHANGED 0x0001
183 #define MENU_ROOT 0x0002
184
185 struct jump_key {
186 struct list_head entries;
187 size_t offset;
188 struct menu *target;
189 int index;
190 };
191
192 #define JUMP_NB 9
193
194 extern struct file *file_list;
195 extern struct file *current_file;
196 struct file *lookup_file(const char *name);
197
198 extern struct symbol symbol_yes, symbol_no, symbol_mod;
199 extern struct symbol *modules_sym;
200 extern struct symbol *sym_defconfig_list;
201 extern int cdebug;
202 struct expr *expr_alloc_symbol(struct symbol *sym);
203 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
204 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
205 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
206 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
207 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
208 struct expr *expr_copy(const struct expr *org);
209 void expr_free(struct expr *e);
210 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
211 tristate expr_calc_value(struct expr *e);
212 struct expr *expr_trans_bool(struct expr *e);
213 struct expr *expr_eliminate_dups(struct expr *e);
214 struct expr *expr_transform(struct expr *e);
215 int expr_contains_symbol(struct expr *dep, struct symbol *sym);
216 bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
217 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
218 struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
219
220 void expr_fprint(struct expr *e, FILE *out);
221 struct gstr; /* forward */
222 void expr_gstr_print(struct expr *e, struct gstr *gs);
223
expr_is_yes(struct expr * e)224 static inline int expr_is_yes(struct expr *e)
225 {
226 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
227 }
228
expr_is_no(struct expr * e)229 static inline int expr_is_no(struct expr *e)
230 {
231 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
232 }
233
234 #ifdef __cplusplus
235 }
236 #endif
237
238 #endif /* EXPR_H */
239