scripts/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 <ctype.h>
   7 #include <stdarg.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "lkc.h"
  12
  13 static const char nohelp_text[] = "There is no help available for this option.";
  14
  15 struct menu rootmenu;
  16 static struct menu **last_entry_ptr;
  17
  18 struct file *file_list;
  19 struct file *current_file;
  20
  21 void menu_warn(struct menu *menu, const char *fmt, ...)
  22 {
  23         va_list ap;
  24         va_start(ap, fmt);
  25         fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
  26         vfprintf(stderr, fmt, ap);
  27         fprintf(stderr, "\n");
  28         va_end(ap);
  29 }
  30
  31 static void prop_warn(struct property *prop, const char *fmt, ...)
  32 {
  33         va_list ap;
  34         va_start(ap, fmt);
  35         fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
  36         vfprintf(stderr, fmt, ap);
  37         fprintf(stderr, "\n");
  38         va_end(ap);
  39 }
  40
  41 void _menu_init(void)
  42 {
  43         current_entry = current_menu = &rootmenu;
  44         last_entry_ptr = &rootmenu.list;
  45 }
  46
  47 void menu_add_entry(struct symbol *sym)
  48 {
  49         struct menu *menu;
  50
  51         menu = xmalloc(sizeof(*menu));
  52         memset(menu, 0, sizeof(*menu));
  53         menu->sym = sym;
  54         menu->parent = current_menu;
  55         menu->file = current_file;
  56         menu->lineno = zconf_lineno();
  57
  58         *last_entry_ptr = menu;
  59         last_entry_ptr = &menu->next;
  60         current_entry = menu;
  61         if (sym)
  62                 menu_add_symbol(P_SYMBOL, sym, NULL);
  63 }
  64
  65 void menu_end_entry(void)
  66 {
  67 }
  68
  69 struct menu *menu_add_menu(void)
  70 {
  71         menu_end_entry();
  72         last_entry_ptr = &current_entry->list;
  73         return current_menu = current_entry;
  74 }
  75
  76 void menu_end_menu(void)
  77 {
  78         last_entry_ptr = &current_menu->next;
  79         current_menu = current_menu->parent;
  80 }
  81
  82 static struct expr *menu_check_dep(struct expr *e)
  83 {
  84         if (!e)
  85                 return e;
  86
  87         switch (e->type) {
  88         case E_NOT:
  89                 e->left.expr = menu_check_dep(e->left.expr);
  90                 break;
  91         case E_OR:
  92         case E_AND:
  93                 e->left.expr = menu_check_dep(e->left.expr);
  94                 e->right.expr = menu_check_dep(e->right.expr);
  95                 break;
  96         case E_SYMBOL:
  97                 /* change 'm' into 'm' && MODULES */
  98                 if (e->left.sym == &symbol_mod)
  99                         return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
 100                 break;
 101         default:
 102                 break;
 103         }
 104         return e;
 105 }
 106
 107 void menu_add_dep(struct expr *dep)
 108 {
 109         current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
 110 }
 111
 112 void menu_set_type(int type)
 113 {
 114         struct symbol *sym = current_entry->sym;
 115
 116         if (sym->type == type)
 117                 return;
 118         if (sym->type == S_UNKNOWN) {
 119                 sym->type = type;
 120                 return;
 121         }
 122         menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'",
 123             sym->name ? sym->name : "<choice>",
 124             sym_type_name(sym->type), sym_type_name(type));
 125 }
 126
 127 struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 128 {
 129         struct property *prop = prop_alloc(type, current_entry->sym);
 130
 131         prop->menu = current_entry;
 132         prop->expr = expr;
 133         prop->visible.expr = menu_check_dep(dep);
 134
 135         if (prompt) {
 136                 if (isspace(*prompt)) {
 137                         prop_warn(prop, "leading whitespace ignored");
 138                         while (isspace(*prompt))
 139                                 prompt++;
 140                 }
 141                 if (current_entry->prompt && current_entry != &rootmenu)
 142                         prop_warn(prop, "prompt redefined");
 143
 144                 /* Apply all upper menus' visibilities to actual prompts. */
 145                 if(type == P_PROMPT) {
 146                         struct menu *menu = current_entry;
 147
 148                         while ((menu = menu->parent) != NULL) {
 149                                 if (!menu->visibility)
 150                                         continue;
 151                                 prop->visible.expr
 152                                         = expr_alloc_and(prop->visible.expr,
 153                                                          menu->visibility);
 154                         }
 155                 }
 156
 157                 current_entry->prompt = prop;
 158         }
 159         prop->text = prompt;
 160
 161         return prop;
 162 }
 163
 164 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 165 {
 166         return menu_add_prop(type, prompt, NULL, dep);
 167 }
 168
 169 void menu_add_visibility(struct expr *expr)
 170 {
 171         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 172             expr);
 173 }
 174
 175 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 176 {
 177         menu_add_prop(type, NULL, expr, dep);
 178 }
 179
 180 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 181 {
 182         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 183 }
 184
 185 void menu_add_option(int token, char *arg)
 186 {
 187         struct property *prop;
 188
 189         switch (token) {
 190         case T_OPT_MODULES:
 191                 prop = prop_alloc(P_DEFAULT, modules_sym);
 192                 prop->expr = expr_alloc_symbol(current_entry->sym);
 193                 break;
 194         case T_OPT_DEFCONFIG_LIST:
 195                 if (!sym_defconfig_list)
 196                         sym_defconfig_list = current_entry->sym;
 197                 else if (sym_defconfig_list != current_entry->sym)
 198                         zconf_error("trying to redefine defconfig symbol");
 199                 break;
 200         case T_OPT_ENV:
 201                 prop_add_env(arg);
 202                 break;
 203         }
 204 }
 205
 206 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
 207 {
 208         return sym2->type == S_INT || sym2->type == S_HEX ||
 209                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 210 }
 211
 212 static void sym_check_prop(struct symbol *sym)
 213 {
 214         struct property *prop;
 215         struct symbol *sym2;
 216         for (prop = sym->prop; prop; prop = prop->next) {
 217                 switch (prop->type) {
 218                 case P_DEFAULT:
 219                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 220                             prop->expr->type != E_SYMBOL)
 221                                 prop_warn(prop,
 222                                     "default for config symbol '%s'"
 223                                     " must be a single symbol", sym->name);
 224                         if (prop->expr->type != E_SYMBOL)
 225                                 break;
 226                         sym2 = prop_get_symbol(prop);
 227                         if (sym->type == S_HEX || sym->type == S_INT) {
 228                                 if (!menu_validate_number(sym, sym2))
 229                                         prop_warn(prop,
 230                                             "'%s': number is invalid",
 231                                             sym->name);
 232                         }
 233                         break;
 234                 case P_SELECT:
 235                         sym2 = prop_get_symbol(prop);
 236                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 237                                 prop_warn(prop,
 238                                     "config symbol '%s' uses select, but is "
 239                                     "not boolean or tristate", sym->name);
 240                         else if (sym2->type != S_UNKNOWN &&
 241                                  sym2->type != S_BOOLEAN &&
 242                                  sym2->type != S_TRISTATE)
 243                                 prop_warn(prop,
 244                                     "'%s' has wrong type. 'select' only "
 245                                     "accept arguments of boolean and "
 246                                     "tristate type", sym2->name);
 247                         break;
 248                 case P_RANGE:
 249                         if (sym->type != S_INT && sym->type != S_HEX)
 250                                 prop_warn(prop, "range is only allowed "
 251                                                 "for int or hex symbols");
 252                         if (!menu_validate_number(sym, prop->expr->left.sym) ||
 253                             !menu_validate_number(sym, prop->expr->right.sym))
 254                                 prop_warn(prop, "range is invalid");
 255                         break;
 256                 default:
 257                         ;
 258                 }
 259         }
 260 }
 261
 262 void menu_finalize(struct menu *parent)
 263 {
 264         struct menu *menu, *last_menu;
 265         struct symbol *sym;
 266         struct property *prop;
 267         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 268
 269         sym = parent->sym;
 270         if (parent->list) {
 271                 if (sym && sym_is_choice(sym)) {
 272                         if (sym->type == S_UNKNOWN) {
 273                                 /* find the first choice value to find out choice type */
 274                                 current_entry = parent;
 275                                 for (menu = parent->list; menu; menu = menu->next) {
 276                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 277                                                 menu_set_type(menu->sym->type);
 278                                                 break;
 279                                         }
 280                                 }
 281                         }
 282                         /* set the type of the remaining choice values */
 283                         for (menu = parent->list; menu; menu = menu->next) {
 284                                 current_entry = menu;
 285                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 286                                         menu_set_type(sym->type);
 287                         }
 288                         parentdep = expr_alloc_symbol(sym);
 289                 } else if (parent->prompt)
 290                         parentdep = parent->prompt->visible.expr;
 291                 else
 292                         parentdep = parent->dep;
 293
 294                 for (menu = parent->list; menu; menu = menu->next) {
 295                         basedep = expr_transform(menu->dep);
 296                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 297                         basedep = expr_eliminate_dups(basedep);
 298                         menu->dep = basedep;
 299                         if (menu->sym)
 300                                 prop = menu->sym->prop;
 301                         else
 302                                 prop = menu->prompt;
 303                         for (; prop; prop = prop->next) {
 304                                 if (prop->menu != menu)
 305                                         continue;
 306                                 dep = expr_transform(prop->visible.expr);
 307                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 308                                 dep = expr_eliminate_dups(dep);
 309                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 310                                         dep = expr_trans_bool(dep);
 311                                 prop->visible.expr = dep;
 312                                 if (prop->type == P_SELECT) {
 313                                         struct symbol *es = prop_get_symbol(prop);
 314                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 315                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 316                                 }
 317                         }
 318                 }
 319                 for (menu = parent->list; menu; menu = menu->next)
 320                         menu_finalize(menu);
 321         } else if (sym) {
 322                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 323                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 324                 basedep = expr_eliminate_dups(expr_transform(basedep));
 325                 last_menu = NULL;
 326                 for (menu = parent->next; menu; menu = menu->next) {
 327                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 328                         if (!expr_contains_symbol(dep, sym))
 329                                 break;
 330                         if (expr_depends_symbol(dep, sym))
 331                                 goto next;
 332                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 333                         dep = expr_eliminate_dups(expr_transform(dep));
 334                         dep2 = expr_copy(basedep);
 335                         expr_eliminate_eq(&dep, &dep2);
 336                         expr_free(dep);
 337                         if (!expr_is_yes(dep2)) {
 338                                 expr_free(dep2);
 339                                 break;
 340                         }
 341                         expr_free(dep2);
 342                 next:
 343                         menu_finalize(menu);
 344                         menu->parent = parent;
 345                         last_menu = menu;
 346                 }
 347                 if (last_menu) {
 348                         parent->list = parent->next;
 349                         parent->next = last_menu->next;
 350                         last_menu->next = NULL;
 351                 }
 352
 353                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 354         }
 355         for (menu = parent->list; menu; menu = menu->next) {
 356                 if (sym && sym_is_choice(sym) &&
 357                     menu->sym && !sym_is_choice_value(menu->sym)) {
 358                         current_entry = menu;
 359                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 360                         if (!menu->prompt)
 361                                 menu_warn(menu, "choice value must have a prompt");
 362                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 363                                 if (prop->type == P_DEFAULT)
 364                                         prop_warn(prop, "defaults for choice "
 365                                                   "values not supported");
 366                                 if (prop->menu == menu)
 367                                         continue;
 368                                 if (prop->type == P_PROMPT &&
 369                                     prop->menu->parent->sym != sym)
 370                                         prop_warn(prop, "choice value used outside its choice group");
 371                         }
 372                         /* Non-tristate choice values of tristate choices must
 373                          * depend on the choice being set to Y. The choice
 374                          * values' dependencies were propagated to their
 375                          * properties above, so the change here must be re-
 376                          * propagated.
 377                          */
 378                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 379                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 380                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 381                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 382                                         if (prop->menu != menu)
 383                                                 continue;
 384                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 385                                                                             prop->visible.expr);
 386                                 }
 387                         }
 388                         menu_add_symbol(P_CHOICE, sym, NULL);
 389                         prop = sym_get_choice_prop(sym);
 390                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 391                                 ;
 392                         *ep = expr_alloc_one(E_LIST, NULL);
 393                         (*ep)->right.sym = menu->sym;
 394                 }
 395                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 396                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 397                                 last_menu->parent = parent;
 398                                 if (!last_menu->next)
 399                                         break;
 400                         }
 401                         last_menu->next = menu->next;
 402                         menu->next = menu->list;
 403                         menu->list = NULL;
 404                 }
 405         }
 406
 407         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 408                 if (sym->type == S_UNKNOWN)
 409                         menu_warn(parent, "config symbol defined without type");
 410
 411                 if (sym_is_choice(sym) && !parent->prompt)
 412                         menu_warn(parent, "choice must have a prompt");
 413
 414                 /* Check properties connected to this symbol */
 415                 sym_check_prop(sym);
 416                 sym->flags |= SYMBOL_WARNED;
 417         }
 418
 419         if (sym && !sym_is_optional(sym) && parent->prompt) {
 420                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 421                                 expr_alloc_and(parent->prompt->visible.expr,
 422                                         expr_alloc_symbol(&symbol_mod)));
 423         }
 424 }
 425
 426 bool menu_has_prompt(struct menu *menu)
 427 {
 428         if (!menu->prompt)
 429                 return false;
 430         return true;
 431 }
 432
 433 bool menu_is_visible(struct menu *menu)
 434 {
 435         struct menu *child;
 436         struct symbol *sym;
 437         tristate visible;
 438
 439         if (!menu->prompt)
 440                 return false;
 441
 442         if (menu->visibility) {
 443                 if (expr_calc_value(menu->visibility) == no)
 444                         return no;
 445         }
 446
 447         sym = menu->sym;
 448         if (sym) {
 449                 sym_calc_value(sym);
 450                 visible = menu->prompt->visible.tri;
 451         } else
 452                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 453
 454         if (visible != no)
 455                 return true;
 456
 457         if (!sym || sym_get_tristate_value(menu->sym) == no)
 458                 return false;
 459
 460         for (child = menu->list; child; child = child->next) {
 461                 if (menu_is_visible(child)) {
 462                         if (sym)
 463                                 sym->flags |= SYMBOL_DEF_USER;
 464                         return true;
 465                 }
 466         }
 467
 468         return false;
 469 }
 470
 471 const char *menu_get_prompt(struct menu *menu)
 472 {
 473         if (menu->prompt)
 474                 return menu->prompt->text;
 475         else if (menu->sym)
 476                 return menu->sym->name;
 477         return NULL;
 478 }
 479
 480 struct menu *menu_get_root_menu(struct menu *menu)
 481 {
 482         return &rootmenu;
 483 }
 484
 485 struct menu *menu_get_parent_menu(struct menu *menu)
 486 {
 487         enum prop_type type;
 488
 489         for (; menu != &rootmenu; menu = menu->parent) {
 490                 type = menu->prompt ? menu->prompt->type : 0;
 491                 if (type == P_MENU)
 492                         break;
 493         }
 494         return menu;
 495 }
 496
 497 bool menu_has_help(struct menu *menu)
 498 {
 499         return menu->help != NULL;
 500 }
 501
 502 const char *menu_get_help(struct menu *menu)
 503 {
 504         if (menu->help)
 505                 return menu->help;
 506         else
 507                 return "";
 508 }
 509
 510 static void get_prompt_str(struct gstr *r, struct property *prop,
 511                            struct list_head *head)
 512 {
 513         int i, j;
 514         struct menu *submenu[8], *menu, *location = NULL;
 515         struct jump_key *jump;
 516
 517         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 518         str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 519                 prop->menu->lineno);
 520         if (!expr_is_yes(prop->visible.expr)) {
 521                 str_append(r, _("  Depends on: "));
 522                 expr_gstr_print(prop->visible.expr, r);
 523                 str_append(r, "\n");
 524         }
 525         menu = prop->menu->parent;
 526         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 527                 bool accessible = menu_is_visible(menu);
 528
 529                 submenu[i++] = menu;
 530                 if (location == NULL && accessible)
 531                         location = menu;
 532         }
 533         if (head && location) {
 534                 jump = xmalloc(sizeof(struct jump_key));
 535
 536                 if (menu_is_visible(prop->menu)) {
 537                         /*
 538                          * There is not enough room to put the hint at the
 539                          * beginning of the "Prompt" line. Put the hint on the
 540                          * last "Location" line even when it would belong on
 541                          * the former.
 542                          */
 543                         jump->target = prop->menu;
 544                 } else
 545                         jump->target = location;
 546
 547                 if (list_empty(head))
 548                         jump->index = 0;
 549                 else
 550                         jump->index = list_entry(head->prev, struct jump_key,
 551                                                  entries)->index + 1;
 552
 553                 list_add_tail(&jump->entries, head);
 554         }
 555
 556         if (i > 0) {
 557                 str_printf(r, _("  Location:\n"));
 558                 for (j = 4; --i >= 0; j += 2) {
 559                         menu = submenu[i];
 560                         if (head && location && menu == location)
 561                                 jump->offset = r->len - 1;
 562                         str_printf(r, "%*c-> %s", j, ' ',
 563                                    _(menu_get_prompt(menu)));
 564                         if (menu->sym) {
 565                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 566                                         menu->sym->name : _("<choice>"),
 567                                         sym_get_string_value(menu->sym));
 568                         }
 569                         str_append(r, "\n");
 570                 }
 571         }
 572 }
 573
 574 /*
 575  * head is optional and may be NULL
 576  */
 577 void get_symbol_str(struct gstr *r, struct symbol *sym,
 578                     struct list_head *head)
 579 {
 580         bool hit;
 581         struct property *prop;
 582
 583         if (sym && sym->name) {
 584                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 585                            sym_get_string_value(sym));
 586                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 587                 if (sym->type == S_INT || sym->type == S_HEX) {
 588                         prop = sym_get_range_prop(sym);
 589                         if (prop) {
 590                                 str_printf(r, "Range : ");
 591                                 expr_gstr_print(prop->expr, r);
 592                                 str_append(r, "\n");
 593                         }
 594                 }
 595         }
 596         for_all_prompts(sym, prop)
 597                 get_prompt_str(r, prop, head);
 598         hit = false;
 599         for_all_properties(sym, prop, P_SELECT) {
 600                 if (!hit) {
 601                         str_append(r, "  Selects: ");
 602                         hit = true;
 603                 } else
 604                         str_printf(r, " && ");
 605                 expr_gstr_print(prop->expr, r);
 606         }
 607         if (hit)
 608                 str_append(r, "\n");
 609         if (sym->rev_dep.expr) {
 610                 str_append(r, _("  Selected by: "));
 611                 expr_gstr_print(sym->rev_dep.expr, r);
 612                 str_append(r, "\n");
 613         }
 614         str_append(r, "\n\n");
 615 }
 616
 617 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 618 {
 619         struct symbol *sym;
 620         struct gstr res = str_new();
 621         int i;
 622
 623         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 624                 get_symbol_str(&res, sym, head);
 625         if (!i)
 626                 str_append(&res, _("No matches found.\n"));
 627         return res;
 628 }
 629
 630
 631 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 632 {
 633         struct symbol *sym = menu->sym;
 634         const char *help_text = nohelp_text;
 635
 636         if (menu_has_help(menu)) {
 637                 if (sym->name)
 638                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 639                 help_text = menu_get_help(menu);
 640         }
 641         str_printf(help, "%s\n", _(help_text));
 642         if (sym)
 643                 get_symbol_str(help, sym, NULL);
 644 }