linux/scripts/kconfig/menu.c
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   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
  13static const char nohelp_text[] = "There is no help available for this option.";
  14
  15struct menu rootmenu;
  16static struct menu **last_entry_ptr;
  17
  18struct file *file_list;
  19struct file *current_file;
  20
  21void 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
  31static 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
  41void _menu_init(void)
  42{
  43        current_entry = current_menu = &rootmenu;
  44        last_entry_ptr = &rootmenu.list;
  45}
  46
  47void menu_add_entry(struct symbol *sym)
  48{
  49        struct menu *menu;
  50
  51        menu = malloc(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
  65void menu_end_entry(void)
  66{
  67}
  68
  69struct 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
  76void menu_end_menu(void)
  77{
  78        last_entry_ptr = &current_menu->next;
  79        current_menu = current_menu->parent;
  80}
  81
  82static 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
 107void menu_add_dep(struct expr *dep)
 108{
 109        current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
 110}
 111
 112void 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
 127struct 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
 164struct 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
 169void menu_add_visibility(struct expr *expr)
 170{
 171        current_entry->visibility = expr_alloc_and(current_entry->visibility,
 172            expr);
 173}
 174
 175void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 176{
 177        menu_add_prop(type, NULL, expr, dep);
 178}
 179
 180void 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
 185void 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
 206static 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
 212static 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
 262void 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
 426bool menu_has_prompt(struct menu *menu)
 427{
 428        if (!menu->prompt)
 429                return false;
 430        return true;
 431}
 432
 433bool 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
 471const 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
 480struct menu *menu_get_root_menu(struct menu *menu)
 481{
 482        return &rootmenu;
 483}
 484
 485struct 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
 497bool menu_has_help(struct menu *menu)
 498{
 499        return menu->help != NULL;
 500}
 501
 502const char *menu_get_help(struct menu *menu)
 503{
 504        if (menu->help)
 505                return menu->help;
 506        else
 507                return "";
 508}
 509
 510static void get_prompt_str(struct gstr *r, struct property *prop)
 511{
 512        int i, j;
 513        struct menu *submenu[8], *menu;
 514
 515        str_printf(r, _("Prompt: %s\n"), _(prop->text));
 516        str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 517                prop->menu->lineno);
 518        if (!expr_is_yes(prop->visible.expr)) {
 519                str_append(r, _("  Depends on: "));
 520                expr_gstr_print(prop->visible.expr, r);
 521                str_append(r, "\n");
 522        }
 523        menu = prop->menu->parent;
 524        for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
 525                submenu[i++] = menu;
 526        if (i > 0) {
 527                str_printf(r, _("  Location:\n"));
 528                for (j = 4; --i >= 0; j += 2) {
 529                        menu = submenu[i];
 530                        str_printf(r, "%*c-> %s", j, ' ', _(menu_get_prompt(menu)));
 531                        if (menu->sym) {
 532                                str_printf(r, " (%s [=%s])", menu->sym->name ?
 533                                        menu->sym->name : _("<choice>"),
 534                                        sym_get_string_value(menu->sym));
 535                        }
 536                        str_append(r, "\n");
 537                }
 538        }
 539}
 540
 541void get_symbol_str(struct gstr *r, struct symbol *sym)
 542{
 543        bool hit;
 544        struct property *prop;
 545
 546        if (sym && sym->name) {
 547                str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 548                           sym_get_string_value(sym));
 549                str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 550                if (sym->type == S_INT || sym->type == S_HEX) {
 551                        prop = sym_get_range_prop(sym);
 552                        if (prop) {
 553                                str_printf(r, "Range : ");
 554                                expr_gstr_print(prop->expr, r);
 555                                str_append(r, "\n");
 556                        }
 557                }
 558        }
 559        for_all_prompts(sym, prop)
 560                get_prompt_str(r, prop);
 561        hit = false;
 562        for_all_properties(sym, prop, P_SELECT) {
 563                if (!hit) {
 564                        str_append(r, "  Selects: ");
 565                        hit = true;
 566                } else
 567                        str_printf(r, " && ");
 568                expr_gstr_print(prop->expr, r);
 569        }
 570        if (hit)
 571                str_append(r, "\n");
 572        if (sym->rev_dep.expr) {
 573                str_append(r, _("  Selected by: "));
 574                expr_gstr_print(sym->rev_dep.expr, r);
 575                str_append(r, "\n");
 576        }
 577        str_append(r, "\n\n");
 578}
 579
 580struct gstr get_relations_str(struct symbol **sym_arr)
 581{
 582        struct symbol *sym;
 583        struct gstr res = str_new();
 584        int i;
 585
 586        for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 587                get_symbol_str(&res, sym);
 588        if (!i)
 589                str_append(&res, _("No matches found.\n"));
 590        return res;
 591}
 592
 593
 594void menu_get_ext_help(struct menu *menu, struct gstr *help)
 595{
 596        struct symbol *sym = menu->sym;
 597        const char *help_text = nohelp_text;
 598
 599        if (menu_has_help(menu)) {
 600                if (sym->name)
 601                        str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 602                help_text = menu_get_help(menu);
 603        }
 604        str_printf(help, "%s\n", _(help_text));
 605        if (sym)
 606                get_symbol_str(help, sym);
 607}
 608
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