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 char *name; 22 int lineno; 23 int flags; 24 }; 25 26 #define FILE_BUSY 0x0001 27 #define FILE_SCANNED 0x0002 28 29 typedef enum tristate { 30 no, mod, yes 31 } tristate; 32 33 enum expr_type { 34 E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE 35 }; 36 37 union expr_data { 38 struct expr *expr; 39 struct symbol *sym; 40 }; 41 42 struct 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 54 struct expr_value { 55 struct expr *expr; 56 tristate tri; 57 }; 58 59 struct symbol_value { 60 void *val; 61 tristate tri; 62 }; 63 64 enum 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[] */ 69 enum { 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 77 struct 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 rev_dep; 87 }; 88 89 #define for_all_symbols(i, sym) for (i = 0; i < 257; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER) 90 91 #define SYMBOL_CONST 0x0001 /* symbol is const */ 92 #define SYMBOL_CHECK 0x0008 /* used during dependency checking */ 93 #define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */ 94 #define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */ 95 #define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */ 96 #define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */ 97 #define SYMBOL_WRITE 0x0200 /* ? */ 98 #define SYMBOL_CHANGED 0x0400 /* ? */ 99 #define SYMBOL_AUTO 0x1000 /* value from environment variable */ 100 #define SYMBOL_CHECKED 0x2000 /* used during dependency checking */ 101 #define SYMBOL_WARNED 0x8000 /* warning has been issued */ 102 103 /* Set when symbol.def[] is used */ 104 #define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */ 105 #define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */ 106 #define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */ 107 #define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */ 108 #define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */ 109 110 #define SYMBOL_MAXLENGTH 256 111 #define SYMBOL_HASHSIZE 257 112 #define SYMBOL_HASHMASK 0xff 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 */ 125 enum 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 }; 136 137 struct property { 138 struct property *next; /* next property - null if last */ 139 struct symbol *sym; /* the symbol for which the property is associated */ 140 enum prop_type type; /* type of property */ 141 const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */ 142 struct expr_value visible; 143 struct expr *expr; /* the optional conditional part of the property */ 144 struct menu *menu; /* the menu the property are associated with 145 * valid for: P_SELECT, P_RANGE, P_CHOICE, 146 * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */ 147 struct file *file; /* what file was this property defined */ 148 int lineno; /* what lineno was this property defined */ 149 }; 150 151 #define for_all_properties(sym, st, tok) \ 152 for (st = sym->prop; st; st = st->next) \ 153 if (st->type == (tok)) 154 #define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT) 155 #define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE) 156 #define for_all_prompts(sym, st) \ 157 for (st = sym->prop; st; st = st->next) \ 158 if (st->text) 159 160 struct menu { 161 struct menu *next; 162 struct menu *parent; 163 struct menu *list; 164 struct symbol *sym; 165 struct property *prompt; 166 struct expr *dep; 167 unsigned int flags; 168 char *help; 169 struct file *file; 170 int lineno; 171 void *data; 172 }; 173 174 #define MENU_CHANGED 0x0001 175 #define MENU_ROOT 0x0002 176 177 #ifndef SWIG 178 179 extern struct file *file_list; 180 extern struct file *current_file; 181 struct file *lookup_file(const char *name); 182 183 extern struct symbol symbol_yes, symbol_no, symbol_mod; 184 extern struct symbol *modules_sym; 185 extern struct symbol *sym_defconfig_list; 186 extern int cdebug; 187 struct expr *expr_alloc_symbol(struct symbol *sym); 188 struct expr *expr_alloc_one(enum expr_type type, struct expr *ce); 189 struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2); 190 struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2); 191 struct expr *expr_alloc_and(struct expr *e1, struct expr *e2); 192 struct expr *expr_alloc_or(struct expr *e1, struct expr *e2); 193 struct expr *expr_copy(struct expr *org); 194 void expr_free(struct expr *e); 195 int expr_eq(struct expr *e1, struct expr *e2); 196 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2); 197 tristate expr_calc_value(struct expr *e); 198 struct expr *expr_eliminate_yn(struct expr *e); 199 struct expr *expr_trans_bool(struct expr *e); 200 struct expr *expr_eliminate_dups(struct expr *e); 201 struct expr *expr_transform(struct expr *e); 202 int expr_contains_symbol(struct expr *dep, struct symbol *sym); 203 bool expr_depends_symbol(struct expr *dep, struct symbol *sym); 204 struct expr *expr_extract_eq_and(struct expr **ep1, struct expr **ep2); 205 struct expr *expr_extract_eq_or(struct expr **ep1, struct expr **ep2); 206 void expr_extract_eq(enum expr_type type, struct expr **ep, struct expr **ep1, struct expr **ep2); 207 struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym); 208 209 void expr_fprint(struct expr *e, FILE *out); 210 struct gstr; /* forward */ 211 void expr_gstr_print(struct expr *e, struct gstr *gs); 212 213 static inline int expr_is_yes(struct expr *e) 214 { 215 return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes); 216 } 217 218 static inline int expr_is_no(struct expr *e) 219 { 220 return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no); 221 } 222 #endif 223 224 #ifdef __cplusplus 225 } 226 #endif 227 228 #endif /* EXPR_H */ 229