scripts/kconfig/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 static 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 void menu_add_menu(void)
  65 {
  66         current_menu = current_entry;
  67         last_entry_ptr = &current_entry->list;
  68 }
  69
  70 void menu_end_menu(void)
  71 {
  72         last_entry_ptr = &current_menu->next;
  73         current_menu = current_menu->parent;
  74 }
  75
  76 struct expr *menu_check_dep(struct expr *e)
  77 {
  78         if (!e)
  79                 return e;
  80
  81         switch (e->type) {
  82         case E_NOT:
  83                 e->left.expr = menu_check_dep(e->left.expr);
  84                 break;
  85         case E_OR:
  86         case E_AND:
  87                 e->left.expr = menu_check_dep(e->left.expr);
  88                 e->right.expr = menu_check_dep(e->right.expr);
  89                 break;
  90         case E_SYMBOL:
  91                 /* change 'm' into 'm' && MODULES */
  92                 if (e->left.sym == &symbol_mod)
  93                         return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
  94                 break;
  95         default:
  96                 break;
  97         }
  98         return e;
  99 }
 100
 101 void menu_add_dep(struct expr *dep)
 102 {
 103         current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
 104 }
 105
 106 void menu_set_type(int type)
 107 {
 108         struct symbol *sym = current_entry->sym;
 109
 110         if (sym->type == type)
 111                 return;
 112         if (sym->type == S_UNKNOWN) {
 113                 sym->type = type;
 114                 return;
 115         }
 116         menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'\n",
 117             sym->name ? sym->name : "<choice>",
 118             sym_type_name(sym->type), sym_type_name(type));
 119 }
 120
 121 struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 122 {
 123         struct property *prop = prop_alloc(type, current_entry->sym);
 124
 125         prop->menu = current_entry;
 126         prop->text = prompt;
 127         prop->expr = expr;
 128         prop->visible.expr = menu_check_dep(dep);
 129
 130         if (prompt) {
 131                 if (current_entry->prompt)
 132                         menu_warn(current_entry, "prompt redefined\n");
 133                 current_entry->prompt = prop;
 134         }
 135
 136         return prop;
 137 }
 138
 139 void menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 140 {
 141         menu_add_prop(type, prompt, NULL, dep);
 142 }
 143
 144 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 145 {
 146         menu_add_prop(type, NULL, expr, dep);
 147 }
 148
 149 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 150 {
 151         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 152 }
 153
 154 void sym_check_prop(struct symbol *sym)
 155 {
 156         struct property *prop;
 157         struct symbol *sym2;
 158         for (prop = sym->prop; prop; prop = prop->next) {
 159                 switch (prop->type) {
 160                 case P_DEFAULT:
 161                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 162                             prop->expr->type != E_SYMBOL)
 163                                 prop_warn(prop,
 164                                     "default for config symbol '%'"
 165                                     " must be a single symbol", sym->name);
 166                         break;
 167                 case P_SELECT:
 168                         sym2 = prop_get_symbol(prop);
 169                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 170                                 prop_warn(prop,
 171                                     "config symbol '%s' uses select, but is "
 172                                     "not boolean or tristate", sym->name);
 173                         else if (sym2->type == S_UNKNOWN)
 174                                 prop_warn(prop,
 175                                     "'select' used by config symbol '%s' "
 176                                     "refer to undefined symbol '%s'",
 177                                     sym->name, sym2->name);
 178                         else if (sym2->type != S_BOOLEAN && sym2->type != S_TRISTATE)
 179                                 prop_warn(prop,
 180                                     "'%s' has wrong type. 'select' only "
 181                                     "accept arguments of boolean and "
 182                                     "tristate type", sym2->name);
 183                         break;
 184                 case P_RANGE:
 185                         if (sym->type != S_INT && sym->type != S_HEX)
 186                                 prop_warn(prop, "range is only allowed "
 187                                                 "for int or hex symbols");
 188                         if (!sym_string_valid(sym, prop->expr->left.sym->name) ||
 189                             !sym_string_valid(sym, prop->expr->right.sym->name))
 190                                 prop_warn(prop, "range is invalid");
 191                         break;
 192                 default:
 193                         ;
 194                 }
 195         }
 196 }
 197
 198 void menu_finalize(struct menu *parent)
 199 {
 200         struct menu *menu, *last_menu;
 201         struct symbol *sym;
 202         struct property *prop;
 203         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 204
 205         sym = parent->sym;
 206         if (parent->list) {
 207                 if (sym && sym_is_choice(sym)) {
 208                         /* find the first choice value and find out choice type */
 209                         for (menu = parent->list; menu; menu = menu->next) {
 210                                 if (menu->sym) {
 211                                         current_entry = parent;
 212                                         menu_set_type(menu->sym->type);
 213                                         current_entry = menu;
 214                                         menu_set_type(sym->type);
 215                                         break;
 216                                 }
 217                         }
 218                         parentdep = expr_alloc_symbol(sym);
 219                 } else if (parent->prompt)
 220                         parentdep = parent->prompt->visible.expr;
 221                 else
 222                         parentdep = parent->dep;
 223
 224                 for (menu = parent->list; menu; menu = menu->next) {
 225                         basedep = expr_transform(menu->dep);
 226                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 227                         basedep = expr_eliminate_dups(basedep);
 228                         menu->dep = basedep;
 229                         if (menu->sym)
 230                                 prop = menu->sym->prop;
 231                         else
 232                                 prop = menu->prompt;
 233                         for (; prop; prop = prop->next) {
 234                                 if (prop->menu != menu)
 235                                         continue;
 236                                 dep = expr_transform(prop->visible.expr);
 237                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 238                                 dep = expr_eliminate_dups(dep);
 239                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 240                                         dep = expr_trans_bool(dep);
 241                                 prop->visible.expr = dep;
 242                                 if (prop->type == P_SELECT) {
 243                                         struct symbol *es = prop_get_symbol(prop);
 244                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 245                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 246                                 }
 247                         }
 248                 }
 249                 for (menu = parent->list; menu; menu = menu->next)
 250                         menu_finalize(menu);
 251         } else if (sym) {
 252                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 253                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 254                 basedep = expr_eliminate_dups(expr_transform(basedep));
 255                 last_menu = NULL;
 256                 for (menu = parent->next; menu; menu = menu->next) {
 257                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 258                         if (!expr_contains_symbol(dep, sym))
 259                                 break;
 260                         if (expr_depends_symbol(dep, sym))
 261                                 goto next;
 262                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 263                         dep = expr_eliminate_dups(expr_transform(dep));
 264                         dep2 = expr_copy(basedep);
 265                         expr_eliminate_eq(&dep, &dep2);
 266                         expr_free(dep);
 267                         if (!expr_is_yes(dep2)) {
 268                                 expr_free(dep2);
 269                                 break;
 270                         }
 271                         expr_free(dep2);
 272                 next:
 273                         menu_finalize(menu);
 274                         menu->parent = parent;
 275                         last_menu = menu;
 276                 }
 277                 if (last_menu) {
 278                         parent->list = parent->next;
 279                         parent->next = last_menu->next;
 280                         last_menu->next = NULL;
 281                 }
 282         }
 283         for (menu = parent->list; menu; menu = menu->next) {
 284                 if (sym && sym_is_choice(sym) && menu->sym) {
 285                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 286                         if (!menu->prompt)
 287                                 menu_warn(menu, "choice value must have a prompt");
 288                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 289                                 if (prop->type == P_PROMPT && prop->menu != menu) {
 290                                         prop_warn(prop, "choice values "
 291                                             "currently only support a "
 292                                             "single prompt");
 293                                 }
 294                                 if (prop->type == P_DEFAULT)
 295                                         prop_warn(prop, "defaults for choice "
 296                                             "values not supported");
 297                         }
 298                         current_entry = menu;
 299                         menu_set_type(sym->type);
 300                         menu_add_symbol(P_CHOICE, sym, NULL);
 301                         prop = sym_get_choice_prop(sym);
 302                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 303                                 ;
 304                         *ep = expr_alloc_one(E_CHOICE, NULL);
 305                         (*ep)->right.sym = menu->sym;
 306                 }
 307                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 308                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 309                                 last_menu->parent = parent;
 310                                 if (!last_menu->next)
 311                                         break;
 312                         }
 313                         last_menu->next = menu->next;
 314                         menu->next = menu->list;
 315                         menu->list = NULL;
 316                 }
 317         }
 318
 319         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 320                 if (sym->type == S_UNKNOWN)
 321                         menu_warn(parent, "config symbol defined "
 322                             "without type\n");
 323
 324                 if (sym_is_choice(sym) && !parent->prompt)
 325                         menu_warn(parent, "choice must have a prompt\n");
 326
 327                 /* Check properties connected to this symbol */
 328                 sym_check_prop(sym);
 329                 sym->flags |= SYMBOL_WARNED;
 330         }
 331
 332         if (sym && !sym_is_optional(sym) && parent->prompt) {
 333                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 334                                 expr_alloc_and(parent->prompt->visible.expr,
 335                                         expr_alloc_symbol(&symbol_mod)));
 336         }
 337 }
 338
 339 bool menu_is_visible(struct menu *menu)
 340 {
 341         struct menu *child;
 342         struct symbol *sym;
 343         tristate visible;
 344
 345         if (!menu->prompt)
 346                 return false;
 347         sym = menu->sym;
 348         if (sym) {
 349                 sym_calc_value(sym);
 350                 visible = menu->prompt->visible.tri;
 351         } else
 352                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 353
 354         if (visible != no)
 355                 return true;
 356         if (!sym || sym_get_tristate_value(menu->sym) == no)
 357                 return false;
 358
 359         for (child = menu->list; child; child = child->next)
 360                 if (menu_is_visible(child))
 361                         return true;
 362         return false;
 363 }
 364
 365 const char *menu_get_prompt(struct menu *menu)
 366 {
 367         if (menu->prompt)
 368                 return _(menu->prompt->text);
 369         else if (menu->sym)
 370                 return _(menu->sym->name);
 371         return NULL;
 372 }
 373
 374 struct menu *menu_get_root_menu(struct menu *menu)
 375 {
 376         return &rootmenu;
 377 }
 378
 379 struct menu *menu_get_parent_menu(struct menu *menu)
 380 {
 381         enum prop_type type;
 382
 383         for (; menu != &rootmenu; menu = menu->parent) {
 384                 type = menu->prompt ? menu->prompt->type : 0;
 385                 if (type == P_MENU)
 386                         break;
 387         }
 388         return menu;
 389 }
 390