config/menu.c

   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 #include <stdlib.h>
   7 #include <string.h>
   8
   9 #define LKC_DIRECT_LINK
  10 #include "lkc.h"
  11
  12 struct menu rootmenu;
  13 static struct menu **last_entry_ptr;
  14
  15 struct file *file_list;
  16 struct file *current_file;
  17
  18 void menu_warn(struct menu *menu, const char *fmt, ...)
  19 {
  20         va_list ap;
  21         va_start(ap, fmt);
  22         fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
  23         vfprintf(stderr, fmt, ap);
  24         fprintf(stderr, "\n");
  25         va_end(ap);
  26 }
  27
  28 static void prop_warn(struct property *prop, const char *fmt, ...)
  29 {
  30         va_list ap;
  31         va_start(ap, fmt);
  32         fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
  33         vfprintf(stderr, fmt, ap);
  34         fprintf(stderr, "\n");
  35         va_end(ap);
  36 }
  37
  38 void menu_init(void)
  39 {
  40         current_entry = current_menu = &rootmenu;
  41         last_entry_ptr = &rootmenu.list;
  42 }
  43
  44 void menu_add_entry(struct symbol *sym)
  45 {
  46         struct menu *menu;
  47
  48         menu = malloc(sizeof(*menu));
  49         memset(menu, 0, sizeof(*menu));
  50         menu->sym = sym;
  51         menu->parent = current_menu;
  52         menu->file = current_file;
  53         menu->lineno = zconf_lineno();
  54
  55         *last_entry_ptr = menu;
  56         last_entry_ptr = &menu->next;
  57         current_entry = menu;
  58 }
  59
  60 void menu_end_entry(void)
  61 {
  62 }
  63
  64 struct menu *menu_add_menu(void)
  65 {
  66         menu_end_entry();
  67         last_entry_ptr = &current_entry->list;
  68         return current_menu = current_entry;
  69 }
  70
  71 void menu_end_menu(void)
  72 {
  73         last_entry_ptr = &current_menu->next;
  74         current_menu = current_menu->parent;
  75 }
  76
  77 struct expr *menu_check_dep(struct expr *e)
  78 {
  79         if (!e)
  80                 return e;
  81
  82         switch (e->type) {
  83         case E_NOT:
  84                 e->left.expr = menu_check_dep(e->left.expr);
  85                 break;
  86         case E_OR:
  87         case E_AND:
  88                 e->left.expr = menu_check_dep(e->left.expr);
  89                 e->right.expr = menu_check_dep(e->right.expr);
  90                 break;
  91         case E_SYMBOL:
  92                 /* change 'm' into 'm' && MODULES */
  93                 if (e->left.sym == &symbol_mod)
  94                         return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
  95                 break;
  96         default:
  97                 break;
  98         }
  99         return e;
 100 }
 101
 102 void menu_add_dep(struct expr *dep)
 103 {
 104         current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
 105 }
 106
 107 void menu_set_type(int type)
 108 {
 109         struct symbol *sym = current_entry->sym;
 110
 111         if (sym->type == type)
 112                 return;
 113         if (sym->type == S_UNKNOWN) {
 114                 sym->type = type;
 115                 return;
 116         }
 117         menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'",
 118             sym->name ? sym->name : "<choice>",
 119             sym_type_name(sym->type), sym_type_name(type));
 120 }
 121
 122 struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 123 {
 124         struct property *prop = prop_alloc(type, current_entry->sym);
 125
 126         prop->menu = current_entry;
 127         prop->expr = expr;
 128         prop->visible.expr = menu_check_dep(dep);
 129
 130         if (prompt) {
 131                 if (isspace(*prompt)) {
 132                         prop_warn(prop, "leading whitespace ignored");
 133                         while (isspace(*prompt))
 134                                 prompt++;
 135                 }
 136                 if (current_entry->prompt)
 137                         prop_warn(prop, "prompt redefined");
 138                 current_entry->prompt = prop;
 139         }
 140         prop->text = prompt;
 141
 142         return prop;
 143 }
 144
 145 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 146 {
 147         return menu_add_prop(type, prompt, NULL, dep);
 148 }
 149
 150 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 151 {
 152         menu_add_prop(type, NULL, expr, dep);
 153 }
 154
 155 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 156 {
 157         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 158 }
 159
 160 void menu_add_option(int token, char *arg)
 161 {
 162         struct property *prop;
 163
 164         switch (token) {
 165         case T_OPT_MODULES:
 166                 prop = prop_alloc(P_DEFAULT, modules_sym);
 167                 prop->expr = expr_alloc_symbol(current_entry->sym);
 168                 break;
 169         case T_OPT_DEFCONFIG_LIST:
 170                 if (!sym_defconfig_list)
 171                         sym_defconfig_list = current_entry->sym;
 172                 else if (sym_defconfig_list != current_entry->sym)
 173                         zconf_error("trying to redefine defconfig symbol");
 174                 break;
 175         case T_OPT_ENV:
 176                 prop_add_env(arg);
 177                 break;
 178         }
 179 }
 180
 181 static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
 182 {
 183         return sym2->type == S_INT || sym2->type == S_HEX ||
 184                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 185 }
 186
 187 void sym_check_prop(struct symbol *sym)
 188 {
 189         struct property *prop;
 190         struct symbol *sym2;
 191         for (prop = sym->prop; prop; prop = prop->next) {
 192                 switch (prop->type) {
 193                 case P_DEFAULT:
 194                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 195                             prop->expr->type != E_SYMBOL)
 196                                 prop_warn(prop,
 197                                     "default for config symbol '%'"
 198                                     " must be a single symbol", sym->name);
 199                         break;
 200                 case P_SELECT:
 201                         sym2 = prop_get_symbol(prop);
 202                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 203                                 prop_warn(prop,
 204                                     "config symbol '%s' uses select, but is "
 205                                     "not boolean or tristate", sym->name);
 206                         else if (sym2->type != S_UNKNOWN &&
 207                                  sym2->type != S_BOOLEAN &&
 208                                  sym2->type != S_TRISTATE)
 209                                 prop_warn(prop,
 210                                     "'%s' has wrong type. 'select' only "
 211                                     "accept arguments of boolean and "
 212                                     "tristate type", sym2->name);
 213                         break;
 214                 case P_RANGE:
 215                         if (sym->type != S_INT && sym->type != S_HEX)
 216                                 prop_warn(prop, "range is only allowed "
 217                                                 "for int or hex symbols");
 218                         if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
 219                             !menu_range_valid_sym(sym, prop->expr->right.sym))
 220                                 prop_warn(prop, "range is invalid");
 221                         break;
 222                 default:
 223                         ;
 224                 }
 225         }
 226 }
 227
 228 void menu_finalize(struct menu *parent)
 229 {
 230         struct menu *menu, *last_menu;
 231         struct symbol *sym;
 232         struct property *prop;
 233         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 234
 235         sym = parent->sym;
 236         if (parent->list) {
 237                 if (sym && sym_is_choice(sym)) {
 238                         if (sym->type == S_UNKNOWN) {
 239                                 /* find the first choice value to find out choice type */
 240                                 current_entry = parent;
 241                                 for (menu = parent->list; menu; menu = menu->next) {
 242                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 243                                                 menu_set_type(menu->sym->type);
 244                                                 break;
 245                                         }
 246                                 }
 247                         }
 248                         /* set the type of the remaining choice values */
 249                         for (menu = parent->list; menu; menu = menu->next) {
 250                                 current_entry = menu;
 251                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 252                                         menu_set_type(sym->type);
 253                         }
 254                         parentdep = expr_alloc_symbol(sym);
 255                 } else if (parent->prompt)
 256                         parentdep = parent->prompt->visible.expr;
 257                 else
 258                         parentdep = parent->dep;
 259
 260                 for (menu = parent->list; menu; menu = menu->next) {
 261                         basedep = expr_transform(menu->dep);
 262                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 263                         basedep = expr_eliminate_dups(basedep);
 264                         menu->dep = basedep;
 265                         if (menu->sym)
 266                                 prop = menu->sym->prop;
 267                         else
 268                                 prop = menu->prompt;
 269                         for (; prop; prop = prop->next) {
 270                                 if (prop->menu != menu)
 271                                         continue;
 272                                 dep = expr_transform(prop->visible.expr);
 273                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 274                                 dep = expr_eliminate_dups(dep);
 275                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 276                                         dep = expr_trans_bool(dep);
 277                                 prop->visible.expr = dep;
 278                                 if (prop->type == P_SELECT) {
 279                                         struct symbol *es = prop_get_symbol(prop);
 280                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 281                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 282                                 }
 283                         }
 284                 }
 285                 for (menu = parent->list; menu; menu = menu->next)
 286                         menu_finalize(menu);
 287         } else if (sym) {
 288                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 289                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 290                 basedep = expr_eliminate_dups(expr_transform(basedep));
 291                 last_menu = NULL;
 292                 for (menu = parent->next; menu; menu = menu->next) {
 293                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 294                         if (!expr_contains_symbol(dep, sym))
 295                                 break;
 296                         if (expr_depends_symbol(dep, sym))
 297                                 goto next;
 298                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 299                         dep = expr_eliminate_dups(expr_transform(dep));
 300                         dep2 = expr_copy(basedep);
 301                         expr_eliminate_eq(&dep, &dep2);
 302                         expr_free(dep);
 303                         if (!expr_is_yes(dep2)) {
 304                                 expr_free(dep2);
 305                                 break;
 306                         }
 307                         expr_free(dep2);
 308                 next:
 309                         menu_finalize(menu);
 310                         menu->parent = parent;
 311                         last_menu = menu;
 312                 }
 313                 if (last_menu) {
 314                         parent->list = parent->next;
 315                         parent->next = last_menu->next;
 316                         last_menu->next = NULL;
 317                 }
 318         }
 319         for (menu = parent->list; menu; menu = menu->next) {
 320                 if (sym && sym_is_choice(sym) &&
 321                     menu->sym && !sym_is_choice_value(menu->sym)) {
 322                         current_entry = menu;
 323                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 324                         if (!menu->prompt)
 325                                 menu_warn(menu, "choice value must have a prompt");
 326                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 327                                 if (prop->type == P_DEFAULT)
 328                                         prop_warn(prop, "defaults for choice "
 329                                                   "values not supported");
 330                                 if (prop->menu == menu)
 331                                         continue;
 332                                 if (prop->type == P_PROMPT &&
 333                                     prop->menu->parent->sym != sym)
 334                                         prop_warn(prop, "choice value used outside its choice group");
 335                         }
 336                         /* Non-tristate choice values of tristate choices must
 337                          * depend on the choice being set to Y. The choice
 338                          * values' dependencies were propagated to their
 339                          * properties above, so the change here must be re-
 340                          * propagated.
 341                          */
 342                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 343                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 344                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 345                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 346                                         if (prop->menu != menu)
 347                                                 continue;
 348                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 349                                                                             prop->visible.expr);
 350                                 }
 351                         }
 352                         menu_add_symbol(P_CHOICE, sym, NULL);
 353                         prop = sym_get_choice_prop(sym);
 354                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 355                                 ;
 356                         *ep = expr_alloc_one(E_LIST, NULL);
 357                         (*ep)->right.sym = menu->sym;
 358                 }
 359                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 360                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 361                                 last_menu->parent = parent;
 362                                 if (!last_menu->next)
 363                                         break;
 364                         }
 365                         last_menu->next = menu->next;
 366                         menu->next = menu->list;
 367                         menu->list = NULL;
 368                 }
 369         }
 370
 371         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 372                 if (sym->type == S_UNKNOWN)
 373                         menu_warn(parent, "config symbol defined without type");
 374
 375                 if (sym_is_choice(sym) && !parent->prompt)
 376                         menu_warn(parent, "choice must have a prompt");
 377
 378                 /* Check properties connected to this symbol */
 379                 sym_check_prop(sym);
 380                 sym->flags |= SYMBOL_WARNED;
 381         }
 382
 383         if (sym && !sym_is_optional(sym) && parent->prompt) {
 384                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 385                                 expr_alloc_and(parent->prompt->visible.expr,
 386                                         expr_alloc_symbol(&symbol_mod)));
 387         }
 388 }
 389
 390 bool menu_is_visible(struct menu *menu)
 391 {
 392         struct menu *child;
 393         struct symbol *sym;
 394         tristate visible;
 395
 396         if (!menu->prompt)
 397                 return false;
 398         sym = menu->sym;
 399         if (sym) {
 400                 sym_calc_value(sym);
 401                 visible = menu->prompt->visible.tri;
 402         } else
 403                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 404
 405         if (visible != no)
 406                 return true;
 407         if (!sym || sym_get_tristate_value(menu->sym) == no)
 408                 return false;
 409
 410         for (child = menu->list; child; child = child->next)
 411                 if (menu_is_visible(child))
 412                         return true;
 413         return false;
 414 }
 415
 416 const char *menu_get_prompt(struct menu *menu)
 417 {
 418         if (menu->prompt)
 419                 return menu->prompt->text;
 420         else if (menu->sym)
 421                 return menu->sym->name;
 422         return NULL;
 423 }
 424
 425 struct menu *menu_get_root_menu(struct menu *menu)
 426 {
 427         return &rootmenu;
 428 }
 429
 430 struct menu *menu_get_parent_menu(struct menu *menu)
 431 {
 432         enum prop_type type;
 433
 434         for (; menu != &rootmenu; menu = menu->parent) {
 435                 type = menu->prompt ? menu->prompt->type : 0;
 436                 if (type == P_MENU)
 437                         break;
 438         }
 439         return menu;
 440 }
 441
 442 bool menu_has_help(struct menu *menu)
 443 {
 444         return menu->help != NULL;
 445 }
 446
 447 const char *menu_get_help(struct menu *menu)
 448 {
 449         if (menu->help)
 450                 return menu->help;
 451         else
 452                 return "";
 453 }