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 <stdio.h> 14 #ifndef __cplusplus 15 #include <stdbool.h> 16 #endif 17 18 struct file { 19 struct file *next; 20 struct file *parent; 21 const char *name; 22 int lineno; 23 }; 24 25 typedef enum tristate { 26 no, mod, yes 27 } tristate; 28 29 enum expr_type { 30 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE 31 }; 32 33 union expr_data { 34 struct expr *expr; 35 struct symbol *sym; 36 }; 37 38 struct 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 50 struct expr_value { 51 struct expr *expr; 52 tristate tri; 53 }; 54 55 struct symbol_value { 56 void *val; 57 tristate tri; 58 }; 59 60 enum 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[] */ 65 enum { 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 73 struct 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 */ 121 enum 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 }; 133 134 struct 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) 156 157 struct 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 extern struct file *file_list; 176 extern struct file *current_file; 177 struct file *lookup_file(const char *name); 178 179 extern struct symbol symbol_yes, symbol_no, symbol_mod; 180 extern struct symbol *modules_sym; 181 extern struct symbol *sym_defconfig_list; 182 extern int cdebug; 183 struct expr *expr_alloc_symbol(struct symbol *sym); 184 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce); 185 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2); 186 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2); 187 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2); 188 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2); 189 struct expr *expr_copy(const struct expr *org); 190 void expr_free(struct expr *e); 191 int expr_eq(struct expr *e1, struct expr *e2); 192 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2); 193 tristate expr_calc_value(struct expr *e); 194 struct expr *expr_eliminate_yn(struct expr *e); 195 struct expr *expr_trans_bool(struct expr *e); 196 struct expr *expr_eliminate_dups(struct expr *e); 197 struct expr *expr_transform(struct expr *e); 198 int expr_contains_symbol(struct expr *dep, struct symbol *sym); 199 bool expr_depends_symbol(struct expr *dep, struct symbol *sym); 200 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2); 201 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2); 202 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2); 203 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym); 204 struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2); 205 206 void expr_fprint(struct expr *e, FILE *out); 207 struct gstr; /* forward */ 208 void expr_gstr_print(struct expr *e, struct gstr *gs); 209 210 static inline int expr_is_yes(struct expr *e) 211 { 212 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes); 213 } 214 215 static inline int expr_is_no(struct expr *e) 216 { 217 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no); 218 } 219 220 #ifdef __cplusplus 221 } 222 #endif 223 224 #endif /* EXPR_H */ 225