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 <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 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 /* tristate always enabled */
  92 #if 0
  93         case E_SYMBOL:
  94                 /* change 'm' into 'm' && MODULES */
  95                 if (e->left.sym == &symbol_mod)
  96                         return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
  97                 break;
  98 #endif
  99         default:
 100                 break;
 101         }
 102         return e;
 103 }
 104
 105 void menu_add_dep(struct expr *dep)
 106 {
 107         current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
 108 }
 109
 110 void menu_set_type(int type)
 111 {
 112         struct symbol *sym = current_entry->sym;
 113
 114         if (sym->type == type)
 115                 return;
 116         if (sym->type == S_UNKNOWN) {
 117                 sym->type = type;
 118                 return;
 119         }
 120         menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'\n",
 121             sym->name ? sym->name : "<choice>",
 122             sym_type_name(sym->type), sym_type_name(type));
 123 }
 124
 125 struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 126 {
 127         struct property *prop = prop_alloc(type, current_entry->sym);
 128
 129         prop->menu = current_entry;
 130         prop->text = prompt;
 131         prop->expr = expr;
 132         prop->visible.expr = menu_check_dep(dep);
 133
 134         if (prompt) {
 135                 if (current_entry->prompt)
 136                         menu_warn(current_entry, "prompt redefined\n");
 137                 current_entry->prompt = prop;
 138         }
 139
 140         return prop;
 141 }
 142
 143 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 144 {
 145         return menu_add_prop(type, prompt, NULL, dep);
 146 }
 147
 148 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 149 {
 150         menu_add_prop(type, NULL, expr, dep);
 151 }
 152
 153 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 154 {
 155         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 156 }
 157
 158 static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
 159 {
 160         return sym2->type == S_INT || sym2->type == S_HEX ||
 161                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 162 }
 163
 164 void sym_check_prop(struct symbol *sym)
 165 {
 166         struct property *prop;
 167         struct symbol *sym2;
 168         for (prop = sym->prop; prop; prop = prop->next) {
 169                 switch (prop->type) {
 170                 case P_DEFAULT:
 171                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 172                             prop->expr->type != E_SYMBOL)
 173                                 prop_warn(prop,
 174                                     "default for config symbol '%'"
 175                                     " must be a single symbol", sym->name);
 176                         break;
 177                 case P_SELECT:
 178                         sym2 = prop_get_symbol(prop);
 179                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 180                                 prop_warn(prop,
 181                                     "config symbol '%s' uses select, but is "
 182                                     "not boolean or tristate", sym->name);
 183                         else if (sym2->type == S_UNKNOWN)
 184                                 prop_warn(prop,
 185                                     "'select' used by config symbol '%s' "
 186                                     "refer to undefined symbol '%s'",
 187                                     sym->name, sym2->name);
 188                         else if (sym2->type != S_BOOLEAN && sym2->type != S_TRISTATE)
 189                                 prop_warn(prop,
 190                                     "'%s' has wrong type. 'select' only "
 191                                     "accept arguments of boolean and "
 192                                     "tristate type", sym2->name);
 193                         break;
 194                 case P_RANGE:
 195                         if (sym->type != S_INT && sym->type != S_HEX)
 196                                 prop_warn(prop, "range is only allowed "
 197                                                 "for int or hex symbols");
 198                         if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
 199                             !menu_range_valid_sym(sym, prop->expr->right.sym))
 200                                 prop_warn(prop, "range is invalid");
 201                         break;
 202                 default:
 203                         ;
 204                 }
 205         }
 206 }
 207
 208 void menu_finalize(struct menu *parent)
 209 {
 210         struct menu *menu, *last_menu;
 211         struct symbol *sym;
 212         struct property *prop;
 213         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 214
 215         sym = parent->sym;
 216         if (parent->list) {
 217                 if (sym && sym_is_choice(sym)) {
 218                         /* find the first choice value and find out choice type */
 219                         for (menu = parent->list; menu; menu = menu->next) {
 220                                 if (menu->sym) {
 221                                         current_entry = parent;
 222                                         menu_set_type(menu->sym->type);
 223                                         current_entry = menu;
 224                                         menu_set_type(sym->type);
 225                                         break;
 226                                 }
 227                         }
 228                         parentdep = expr_alloc_symbol(sym);
 229                 } else if (parent->prompt)
 230                         parentdep = parent->prompt->visible.expr;
 231                 else
 232                         parentdep = parent->dep;
 233
 234                 for (menu = parent->list; menu; menu = menu->next) {
 235                         basedep = expr_transform(menu->dep);
 236                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 237                         basedep = expr_eliminate_dups(basedep);
 238                         menu->dep = basedep;
 239                         if (menu->sym)
 240                                 prop = menu->sym->prop;
 241                         else
 242                                 prop = menu->prompt;
 243                         for (; prop; prop = prop->next) {
 244                                 if (prop->menu != menu)
 245                                         continue;
 246                                 dep = expr_transform(prop->visible.expr);
 247                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 248                                 dep = expr_eliminate_dups(dep);
 249                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 250                                         dep = expr_trans_bool(dep);
 251                                 prop->visible.expr = dep;
 252                                 if (prop->type == P_SELECT) {
 253                                         struct symbol *es = prop_get_symbol(prop);
 254                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 255                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 256                                 }
 257                         }
 258                 }
 259                 for (menu = parent->list; menu; menu = menu->next)
 260                         menu_finalize(menu);
 261         } else if (sym) {
 262                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 263                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 264                 basedep = expr_eliminate_dups(expr_transform(basedep));
 265                 last_menu = NULL;
 266                 for (menu = parent->next; menu; menu = menu->next) {
 267                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 268                         if (!expr_contains_symbol(dep, sym))
 269                                 break;
 270                         if (expr_depends_symbol(dep, sym))
 271                                 goto next;
 272                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 273                         dep = expr_eliminate_dups(expr_transform(dep));
 274                         dep2 = expr_copy(basedep);
 275                         expr_eliminate_eq(&dep, &dep2);
 276                         expr_free(dep);
 277                         if (!expr_is_yes(dep2)) {
 278                                 expr_free(dep2);
 279                                 break;
 280                         }
 281                         expr_free(dep2);
 282                 next:
 283                         menu_finalize(menu);
 284                         menu->parent = parent;
 285                         last_menu = menu;
 286                 }
 287                 if (last_menu) {
 288                         parent->list = parent->next;
 289                         parent->next = last_menu->next;
 290                         last_menu->next = NULL;
 291                 }
 292         }
 293         for (menu = parent->list; menu; menu = menu->next) {
 294                 if (sym && sym_is_choice(sym) && menu->sym) {
 295                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 296                         if (!menu->prompt)
 297                                 menu_warn(menu, "choice value must have a prompt");
 298                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 299                                 if (prop->type == P_PROMPT && prop->menu != menu) {
 300                                         prop_warn(prop, "choice values "
 301                                             "currently only support a "
 302                                             "single prompt");
 303                                 }
 304                                 if (prop->type == P_DEFAULT)
 305                                         prop_warn(prop, "defaults for choice "
 306                                             "values not supported");
 307                         }
 308                         current_entry = menu;
 309                         menu_set_type(sym->type);
 310                         menu_add_symbol(P_CHOICE, sym, NULL);
 311                         prop = sym_get_choice_prop(sym);
 312                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 313                                 ;
 314                         *ep = expr_alloc_one(E_CHOICE, NULL);
 315                         (*ep)->right.sym = menu->sym;
 316                 }
 317                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 318                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 319                                 last_menu->parent = parent;
 320                                 if (!last_menu->next)
 321                                         break;
 322                         }
 323                         last_menu->next = menu->next;
 324                         menu->next = menu->list;
 325                         menu->list = NULL;
 326                 }
 327         }
 328
 329         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 330                 if (sym->type == S_UNKNOWN)
 331                         menu_warn(parent, "config symbol defined "
 332                             "without type\n");
 333
 334                 if (sym_is_choice(sym) && !parent->prompt)
 335                         menu_warn(parent, "choice must have a prompt\n");
 336
 337                 /* Check properties connected to this symbol */
 338                 sym_check_prop(sym);
 339                 sym->flags |= SYMBOL_WARNED;
 340         }
 341
 342         if (sym && !sym_is_optional(sym) && parent->prompt) {
 343                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 344                                 expr_alloc_and(parent->prompt->visible.expr,
 345                                         expr_alloc_symbol(&symbol_mod)));
 346         }
 347 }
 348
 349 bool menu_is_visible(struct menu *menu)
 350 {
 351         struct menu *child;
 352         struct symbol *sym;
 353         tristate visible;
 354
 355         if (!menu->prompt)
 356                 return false;
 357         sym = menu->sym;
 358         if (sym) {
 359                 sym_calc_value(sym);
 360                 visible = menu->prompt->visible.tri;
 361         } else
 362                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 363
 364         if (visible != no)
 365                 return true;
 366         if (!sym || sym_get_tristate_value(menu->sym) == no)
 367                 return false;
 368
 369         for (child = menu->list; child; child = child->next)
 370                 if (menu_is_visible(child))
 371                         return true;
 372         return false;
 373 }
 374
 375 const char *menu_get_prompt(struct menu *menu)
 376 {
 377         if (menu->prompt)
 378                 return _(menu->prompt->text);
 379         else if (menu->sym)
 380                 return _(menu->sym->name);
 381         return NULL;
 382 }
 383
 384 struct menu *menu_get_root_menu(struct menu *menu)
 385 {
 386         return &rootmenu;
 387 }
 388
 389 struct menu *menu_get_parent_menu(struct menu *menu)
 390 {
 391         enum prop_type type;
 392
 393         for (; menu != &rootmenu; menu = menu->parent) {
 394                 type = menu->prompt ? menu->prompt->type : 0;
 395                 if (type == P_MENU)
 396                         break;
 397         }
 398         return menu;
 399 }
 400