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 <stdlib.h>
   7#include <string.h>
   8
   9#define LKC_DIRECT_LINK
  10#include "lkc.h"
  11
  12struct menu rootmenu;
  13static struct menu **last_entry_ptr;
  14
  15struct file *file_list;
  16struct file *current_file;
  17
  18void 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
  28static 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
  38void menu_init(void)
  39{
  40        current_entry = current_menu = &rootmenu;
  41        last_entry_ptr = &rootmenu.list;
  42}
  43
  44void 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
  60void menu_end_entry(void)
  61{
  62}
  63
  64struct 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
  71void menu_end_menu(void)
  72{
  73        last_entry_ptr = &current_menu->next;
  74        current_menu = current_menu->parent;
  75}
  76
  77struct 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
 102void menu_add_dep(struct expr *dep)
 103{
 104        current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
 105}
 106
 107void 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
 122struct 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
 145struct 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
 150void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 151{
 152        menu_add_prop(type, NULL, expr, dep);
 153}
 154
 155void 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
 160void 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
 181static 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
 187void 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
 228void 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
 390bool 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
 416const 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
 425struct menu *menu_get_root_menu(struct menu *menu)
 426{
 427        return &rootmenu;
 428}
 429
 430struct 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
 442bool menu_has_help(struct menu *menu)
 443{
 444        return menu->help != NULL;
 445}
 446
 447const char *menu_get_help(struct menu *menu)
 448{
 449        if (menu->help)
 450                return menu->help;
 451        else
 452                return "";
 453}
 454