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