Root/scripts/kconfig/expr.h

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
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    const char *name;
22    int lineno;
23};
24
25typedef enum tristate {
26    no, mod, yes
27} tristate;
28
29enum expr_type {
30    E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
31};
32
33union expr_data {
34    struct expr *expr;
35    struct symbol *sym;
36};
37
38struct expr {
39    enum expr_type type;
40    union expr_data left, right;
41};
42
43#define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
44#define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
45#define EXPR_NOT(dep) (2-(dep))
46
47#define expr_list_for_each_sym(l, e, s) \
48    for (e = (l); e && (s = e->right.sym); e = e->left.expr)
49
50struct expr_value {
51    struct expr *expr;
52    tristate tri;
53};
54
55struct symbol_value {
56    void *val;
57    tristate tri;
58};
59
60enum symbol_type {
61    S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
62};
63
64/* enum values are used as index to symbol.def[] */
65enum {
66    S_DEF_USER, /* main user value */
67    S_DEF_AUTO, /* values read from auto.conf */
68    S_DEF_DEF3, /* Reserved for UI usage */
69    S_DEF_DEF4, /* Reserved for UI usage */
70    S_DEF_COUNT
71};
72
73struct symbol {
74    struct symbol *next;
75    char *name;
76    enum symbol_type type;
77    struct symbol_value curr;
78    struct symbol_value def[S_DEF_COUNT];
79    tristate visible;
80    int flags;
81    struct property *prop;
82    struct expr_value dir_dep;
83    struct expr_value rev_dep;
84};
85
86#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)
87
88#define SYMBOL_CONST 0x0001 /* symbol is const */
89#define SYMBOL_CHECK 0x0008 /* used during dependency checking */
90#define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
91#define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
92#define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
93#define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
94#define SYMBOL_WRITE 0x0200 /* ? */
95#define SYMBOL_CHANGED 0x0400 /* ? */
96#define SYMBOL_AUTO 0x1000 /* value from environment variable */
97#define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
98#define SYMBOL_WARNED 0x8000 /* warning has been issued */
99
100/* Set when symbol.def[] is used */
101#define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
102#define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
103#define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
104#define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
105#define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
106
107#define SYMBOL_MAXLENGTH 256
108#define SYMBOL_HASHSIZE 9973
109
110/* A property represent the config options that can be associated
111 * with a config "symbol".
112 * Sample:
113 * config FOO
114 * default y
115 * prompt "foo prompt"
116 * select BAR
117 * config BAZ
118 * int "BAZ Value"
119 * range 1..255
120 */
121enum prop_type {
122    P_UNKNOWN,
123    P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
124    P_COMMENT, /* text associated with a comment */
125    P_MENU, /* prompt associated with a menuconfig option */
126    P_DEFAULT, /* default y */
127    P_CHOICE, /* choice value */
128    P_SELECT, /* select BAR */
129    P_RANGE, /* range 7..100 (for a symbol) */
130    P_ENV, /* value from environment variable */
131    P_SYMBOL, /* where a symbol is defined */
132};
133
134struct property {
135    struct property *next; /* next property - null if last */
136    struct symbol *sym; /* the symbol for which the property is associated */
137    enum prop_type type; /* type of property */
138    const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
139    struct expr_value visible;
140    struct expr *expr; /* the optional conditional part of the property */
141    struct menu *menu; /* the menu the property are associated with
142                                * valid for: P_SELECT, P_RANGE, P_CHOICE,
143                                * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
144    struct file *file; /* what file was this property defined */
145    int lineno; /* what lineno was this property defined */
146};
147
148#define for_all_properties(sym, st, tok) \
149    for (st = sym->prop; st; st = st->next) \
150        if (st->type == (tok))
151#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
152#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
153#define for_all_prompts(sym, st) \
154    for (st = sym->prop; st; st = st->next) \
155        if (st->text)
156
157struct menu {
158    struct menu *next;
159    struct menu *parent;
160    struct menu *list;
161    struct symbol *sym;
162    struct property *prompt;
163    struct expr *visibility;
164    struct expr *dep;
165    unsigned int flags;
166    char *help;
167    struct file *file;
168    int lineno;
169    void *data;
170};
171
172#define MENU_CHANGED 0x0001
173#define MENU_ROOT 0x0002
174
175#ifndef SWIG
176
177extern struct file *file_list;
178extern struct file *current_file;
179struct file *lookup_file(const char *name);
180
181extern struct symbol symbol_yes, symbol_no, symbol_mod;
182extern struct symbol *modules_sym;
183extern struct symbol *sym_defconfig_list;
184extern int cdebug;
185struct expr *expr_alloc_symbol(struct symbol *sym);
186struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
187struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
188struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
189struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
190struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
191struct expr *expr_copy(const struct expr *org);
192void expr_free(struct expr *e);
193int expr_eq(struct expr *e1, struct expr *e2);
194void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
195tristate expr_calc_value(struct expr *e);
196struct expr *expr_eliminate_yn(struct expr *e);
197struct expr *expr_trans_bool(struct expr *e);
198struct expr *expr_eliminate_dups(struct expr *e);
199struct expr *expr_transform(struct expr *e);
200int expr_contains_symbol(struct expr *dep, struct symbol *sym);
201bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
202struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
203struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
204void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
205struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
206struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
207
208void expr_fprint(struct expr *e, FILE *out);
209struct gstr; /* forward */
210void expr_gstr_print(struct expr *e, struct gstr *gs);
211
212static inline int expr_is_yes(struct expr *e)
213{
214    return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
215}
216
217static inline int expr_is_no(struct expr *e)
218{
219    return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
220}
221#endif
222
223#ifdef __cplusplus
224}
225#endif
226
227#endif /* EXPR_H */
228

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