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 <assert.h> 14 #include <stdio.h> 15 #include "list.h" 16 #ifndef __cplusplus 17 #include <stdbool.h> 18 #endif 19 20 struct file { 21 struct file *next; 22 struct file *parent; 23 const char *name; 24 int lineno; 25 }; 26 27 typedef enum tristate { 28 no, mod, yes 29 } tristate; 30 31 enum expr_type { 32 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE 33 }; 34 35 union expr_data { 36 struct expr *expr; 37 struct symbol *sym; 38 }; 39 40 struct expr { 41 enum expr_type type; 42 union expr_data left, right; 43 }; 44 45 #define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2)) 46 #define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2)) 47 #define EXPR_NOT(dep) (2-(dep)) 48 49 #define expr_list_for_each_sym(l, e, s) \ 50 for (e = (l); e && (s = e->right.sym); e = e->left.expr) 51 52 struct expr_value { 53 struct expr *expr; 54 tristate tri; 55 }; 56 57 struct symbol_value { 58 void *val; 59 tristate tri; 60 }; 61 62 enum symbol_type { 63 S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER 64 }; 65 66 /* enum values are used as index to symbol.def[] */ 67 enum { 68 S_DEF_USER, /* main user value */ 69 S_DEF_AUTO, /* values read from auto.conf */ 70 S_DEF_DEF3, /* Reserved for UI usage */ 71 S_DEF_DEF4, /* Reserved for UI usage */ 72 S_DEF_COUNT 73 }; 74 75 struct symbol { 76 struct symbol *next; 77 char *name; 78 enum symbol_type type; 79 struct symbol_value curr; 80 struct symbol_value def[S_DEF_COUNT]; 81 tristate visible; 82 int flags; 83 struct property *prop; 84 struct expr_value dir_dep; 85 struct expr_value rev_dep; 86 }; 87 88 #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) 89 90 #define SYMBOL_CONST 0x0001 /* symbol is const */ 91 #define SYMBOL_CHECK 0x0008 /* used during dependency checking */ 92 #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */ 93 #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */ 94 #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */ 95 #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */ 96 #define SYMBOL_WRITE 0x0200 /* ? */ 97 #define SYMBOL_CHANGED 0x0400 /* ? */ 98 #define SYMBOL_AUTO 0x1000 /* value from environment variable */ 99 #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */ 100 #define SYMBOL_WARNED 0x8000 /* warning has been issued */ 101 102 /* Set when symbol.def[] is used */ 103 #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */ 104 #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */ 105 #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */ 106 #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */ 107 #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */ 108 109 /* choice values need to be set before calculating this symbol value */ 110 #define SYMBOL_NEED_SET_CHOICE_VALUES 0x100000 111 112 #define SYMBOL_MAXLENGTH 256 113 #define SYMBOL_HASHSIZE 9973 114 115 /* A property represent the config options that can be associated 116 * with a config "symbol". 117 * Sample: 118 * config FOO 119 * default y 120 * prompt "foo prompt" 121 * select BAR 122 * config BAZ 123 * int "BAZ Value" 124 * range 1..255 125 */ 126 enum prop_type { 127 P_UNKNOWN, 128 P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */ 129 P_COMMENT, /* text associated with a comment */ 130 P_MENU, /* prompt associated with a menuconfig option */ 131 P_DEFAULT, /* default y */ 132 P_CHOICE, /* choice value */ 133 P_SELECT, /* select BAR */ 134 P_RANGE, /* range 7..100 (for a symbol) */ 135 P_ENV, /* value from environment variable */ 136 P_SYMBOL, /* where a symbol is defined */ 137 }; 138 139 struct property { 140 struct property *next; /* next property - null if last */ 141 struct symbol *sym; /* the symbol for which the property is associated */ 142 enum prop_type type; /* type of property */ 143 const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */ 144 struct expr_value visible; 145 struct expr *expr; /* the optional conditional part of the property */ 146 struct menu *menu; /* the menu the property are associated with 147 * valid for: P_SELECT, P_RANGE, P_CHOICE, 148 * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */ 149 struct file *file; /* what file was this property defined */ 150 int lineno; /* what lineno was this property defined */ 151 }; 152 153 #define for_all_properties(sym, st, tok) \ 154 for (st = sym->prop; st; st = st->next) \ 155 if (st->type == (tok)) 156 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT) 157 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE) 158 #define for_all_prompts(sym, st) \ 159 for (st = sym->prop; st; st = st->next) \ 160 if (st->text) 161 162 struct menu { 163 struct menu *next; 164 struct menu *parent; 165 struct menu *list; 166 struct symbol *sym; 167 struct property *prompt; 168 struct expr *visibility; 169 struct expr *dep; 170 unsigned int flags; 171 char *help; 172 struct file *file; 173 int lineno; 174 void *data; 175 }; 176 177 #define MENU_CHANGED 0x0001 178 #define MENU_ROOT 0x0002 179 180 struct jump_key { 181 struct list_head entries; 182 size_t offset; 183 struct menu *target; 184 int index; 185 }; 186 187 #define JUMP_NB 9 188 189 extern struct file *file_list; 190 extern struct file *current_file; 191 struct file *lookup_file(const char *name); 192 193 extern struct symbol symbol_yes, symbol_no, symbol_mod; 194 extern struct symbol *modules_sym; 195 extern struct symbol *sym_defconfig_list; 196 extern int cdebug; 197 struct expr *expr_alloc_symbol(struct symbol *sym); 198 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce); 199 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2); 200 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2); 201 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2); 202 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2); 203 struct expr *expr_copy(const struct expr *org); 204 void expr_free(struct expr *e); 205 int expr_eq(struct expr *e1, struct expr *e2); 206 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2); 207 tristate expr_calc_value(struct expr *e); 208 struct expr *expr_eliminate_yn(struct expr *e); 209 struct expr *expr_trans_bool(struct expr *e); 210 struct expr *expr_eliminate_dups(struct expr *e); 211 struct expr *expr_transform(struct expr *e); 212 int expr_contains_symbol(struct expr *dep, struct symbol *sym); 213 bool expr_depends_symbol(struct expr *dep, struct symbol *sym); 214 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2); 215 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2); 216 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2); 217 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym); 218 struct expr *expr_simplify_unmet_dep(struct expr *e1, struct expr *e2); 219 220 void expr_fprint(struct expr *e, FILE *out); 221 struct gstr; /* forward */ 222 void expr_gstr_print(struct expr *e, struct gstr *gs); 223 224 static inline int expr_is_yes(struct expr *e) 225 { 226 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes); 227 } 228 229 static inline int expr_is_no(struct expr *e) 230 { 231 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no); 232 } 233 234 #ifdef __cplusplus 235 } 236 #endif 237 238 #endif /* EXPR_H */ 239