225 lines
6.9 KiB
C
225 lines
6.9 KiB
C
/*
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* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
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* Released under the terms of the GNU GPL v2.0.
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*/
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#ifndef EXPR_H
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#define EXPR_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#ifndef __cplusplus
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#include <stdbool.h>
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#endif
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struct file {
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struct file *next;
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struct file *parent;
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const char *name;
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int lineno;
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};
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typedef enum tristate {
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no, mod, yes
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} tristate;
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enum expr_type {
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E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
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};
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union expr_data {
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struct expr *expr;
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struct symbol *sym;
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};
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struct expr {
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enum expr_type type;
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union expr_data left, right;
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};
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#define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
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#define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
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#define EXPR_NOT(dep) (2-(dep))
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#define expr_list_for_each_sym(l, e, s) \
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for (e = (l); e && (s = e->right.sym); e = e->left.expr)
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struct expr_value {
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struct expr *expr;
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tristate tri;
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};
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struct symbol_value {
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void *val;
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tristate tri;
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};
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enum symbol_type {
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S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
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};
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/* enum values are used as index to symbol.def[] */
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enum {
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S_DEF_USER, /* main user value */
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S_DEF_AUTO, /* values read from auto.conf */
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S_DEF_DEF3, /* Reserved for UI usage */
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S_DEF_DEF4, /* Reserved for UI usage */
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S_DEF_COUNT
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};
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struct symbol {
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struct symbol *next;
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char *name;
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enum symbol_type type;
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struct symbol_value curr;
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struct symbol_value def[S_DEF_COUNT];
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tristate visible;
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int flags;
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struct property *prop;
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struct expr_value dir_dep;
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struct expr_value rev_dep;
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};
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#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)
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#define SYMBOL_CONST 0x0001 /* symbol is const */
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#define SYMBOL_CHECK 0x0008 /* used during dependency checking */
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#define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
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#define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
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#define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
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#define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
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#define SYMBOL_WRITE 0x0200 /* ? */
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#define SYMBOL_CHANGED 0x0400 /* ? */
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#define SYMBOL_AUTO 0x1000 /* value from environment variable */
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#define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
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#define SYMBOL_WARNED 0x8000 /* warning has been issued */
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/* Set when symbol.def[] is used */
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#define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
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#define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
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#define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
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#define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
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#define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
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#define SYMBOL_MAXLENGTH 256
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#define SYMBOL_HASHSIZE 9973
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/* A property represent the config options that can be associated
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* with a config "symbol".
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* Sample:
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* config FOO
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* default y
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* prompt "foo prompt"
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* select BAR
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* config BAZ
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* int "BAZ Value"
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* range 1..255
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*/
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enum prop_type {
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P_UNKNOWN,
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P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
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P_COMMENT, /* text associated with a comment */
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P_MENU, /* prompt associated with a menuconfig option */
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P_DEFAULT, /* default y */
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P_CHOICE, /* choice value */
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P_SELECT, /* select BAR */
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P_RANGE, /* range 7..100 (for a symbol) */
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P_ENV, /* value from environment variable */
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P_SYMBOL, /* where a symbol is defined */
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};
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struct property {
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struct property *next; /* next property - null if last */
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struct symbol *sym; /* the symbol for which the property is associated */
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enum prop_type type; /* type of property */
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const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
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struct expr_value visible;
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struct expr *expr; /* the optional conditional part of the property */
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struct menu *menu; /* the menu the property are associated with
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* valid for: P_SELECT, P_RANGE, P_CHOICE,
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* P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
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struct file *file; /* what file was this property defined */
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int lineno; /* what lineno was this property defined */
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};
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#define for_all_properties(sym, st, tok) \
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for (st = sym->prop; st; st = st->next) \
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if (st->type == (tok))
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#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
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#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
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#define for_all_prompts(sym, st) \
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for (st = sym->prop; st; st = st->next) \
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if (st->text)
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struct menu {
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struct menu *next;
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struct menu *parent;
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struct menu *list;
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struct symbol *sym;
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struct property *prompt;
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struct expr *visibility;
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struct expr *dep;
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unsigned int flags;
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char *help;
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struct file *file;
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int lineno;
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void *data;
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};
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#define MENU_CHANGED 0x0001
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#define MENU_ROOT 0x0002
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extern struct file *file_list;
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extern struct file *current_file;
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struct file *lookup_file(const char *name);
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extern struct symbol symbol_yes, symbol_no, symbol_mod;
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extern struct symbol *modules_sym;
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extern struct symbol *sym_defconfig_list;
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extern int cdebug;
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struct expr *expr_alloc_symbol(struct symbol *sym);
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struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
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struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
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struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
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struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
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struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
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struct expr *expr_copy(const struct expr *org);
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void expr_free(struct expr *e);
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int expr_eq(struct expr *e1, struct expr *e2);
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void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
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tristate expr_calc_value(struct expr *e);
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struct expr *expr_eliminate_yn(struct expr *e);
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struct expr *expr_trans_bool(struct expr *e);
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struct expr *expr_eliminate_dups(struct expr *e);
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struct expr *expr_transform(struct expr *e);
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int expr_contains_symbol(struct expr *dep, struct symbol *sym);
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bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
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struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2);
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struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2);
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void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2);
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struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
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struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2);
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void expr_fprint(struct expr *e, FILE *out);
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struct gstr; /* forward */
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void expr_gstr_print(struct expr *e, struct gstr *gs);
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static inline int expr_is_yes(struct expr *e)
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{
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return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
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}
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static inline int expr_is_no(struct expr *e)
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{
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return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* EXPR_H */
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