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