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 char *name; 22 int lineno; 23 int flags; 24}; 25 26#define FILE_BUSY 0x0001 27#define FILE_SCANNED 0x0002 28 29typedef enum tristate { 30 no, mod, yes 31} tristate; 32 33enum expr_type { 34 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE 35}; 36 37union expr_data { 38 struct expr *expr; 39 struct symbol *sym; 40}; 41 42struct 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 54struct expr_value { 55 struct expr *expr; 56 tristate tri; 57}; 58 59struct symbol_value { 60 void *val; 61 tristate tri; 62}; 63 64enum 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[] */ 69enum { 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 77struct 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 /* ? */ 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#define SYMBOL_MAXLENGTH 256 112#define SYMBOL_HASHSIZE 9973 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 */ 125enum 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 P_SYMBOL, /* where a symbol is defined */ 136}; 137 138struct property { 139 struct property *next; /* next property - null if last */ 140 struct symbol *sym; /* the symbol for which the property is associated */ 141 enum prop_type type; /* type of property */ 142 const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */ 143 struct expr_value visible; 144 struct expr *expr; /* the optional conditional part of the property */ 145 struct menu *menu; /* the menu the property are associated with 146 * valid for: P_SELECT, P_RANGE, P_CHOICE, 147 * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */ 148 struct file *file; /* what file was this property defined */ 149 int lineno; /* what lineno was this property defined */ 150}; 151 152#define for_all_properties(sym, st, tok) \ 153 for (st = sym->prop; st; st = st->next) \ 154 if (st->type == (tok)) 155#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT) 156#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE) 157#define for_all_prompts(sym, st) \ 158 for (st = sym->prop; st; st = st->next) \ 159 if (st->text) 160 161struct menu { 162 struct menu *next; 163 struct menu *parent; 164 struct menu *list; 165 struct symbol *sym; 166 struct property *prompt; 167 struct expr *dep; 168 unsigned int flags; 169 char *help; 170 struct file *file; 171 int lineno; 172 void *data; 173}; 174 175#define MENU_CHANGED 0x0001 176#define MENU_ROOT 0x0002 177 178#ifndef SWIG 179 180extern struct file *file_list; 181extern struct file *current_file; 182struct file *lookup_file(const char *name); 183 184extern struct symbol symbol_yes, symbol_no, symbol_mod; 185extern struct symbol *modules_sym; 186extern struct symbol *sym_defconfig_list; 187extern int cdebug; 188struct expr *expr_alloc_symbol(struct symbol *sym); 189struct expr *expr_alloc_one(enum expr_type type, struct expr *ce); 190struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2); 191struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2); 192struct expr *expr_alloc_and(struct expr *e1, struct expr *e2); 193struct expr *expr_alloc_or(struct expr *e1, struct expr *e2); 194struct expr *expr_copy(struct expr *org); 195void expr_free(struct expr *e); 196int expr_eq(struct expr *e1, struct expr *e2); 197void expr_eliminate_eq(struct expr **ep1, struct expr **ep2); 198tristate expr_calc_value(struct expr *e); 199struct expr *expr_eliminate_yn(struct expr *e); 200struct expr *expr_trans_bool(struct expr *e); 201struct expr *expr_eliminate_dups(struct expr *e); 202struct expr *expr_transform(struct expr *e); 203int expr_contains_symbol(struct expr *dep, struct symbol *sym); 204bool expr_depends_symbol(struct expr *dep, struct symbol *sym); 205struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2); 206struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2); 207void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2); 208struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym); 209 210void expr_fprint(struct expr *e, FILE *out); 211struct gstr; /* forward */ 212void expr_gstr_print(struct expr *e, struct gstr *gs); 213 214static inline int expr_is_yes(struct expr *e) 215{ 216 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes); 217} 218 219static inline int expr_is_no(struct expr *e) 220{ 221 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no); 222} 223#endif 224 225#ifdef __cplusplus 226} 227#endif 228 229#endif /* EXPR_H */ 230