ucimap.c

   1 /*
   2  * ucimap.c - Library for the Unified Configuration Interface
   3  * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 /*
  16  * This file contains ucimap, an API for mapping UCI to C data structures
  17  */
  18
  19 #include <strings.h>
  20 #include <stdbool.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <limits.h>
  25 #include <stdio.h>
  26 #include <ctype.h>
  27 #include <errno.h>
  28 #include "ucimap.h"
  29 #include "uci_internal.h"
  30
  31 struct ucimap_alloc {
  32         void *ptr;
  33 };
  34
  35 struct ucimap_alloc_custom {
  36         void *section;
  37         struct uci_optmap *om;
  38         void *ptr;
  39 };
  40
  41 struct ucimap_fixup {
  42         struct ucimap_fixup *next;
  43         struct uci_sectionmap *sm;
  44         const char *name;
  45         enum ucimap_type type;
  46         union ucimap_data *data;
  47 };
  48
  49 #define ucimap_foreach_option(_sm, _o) \
  50         if (!(_sm)->options_size) \
  51                 (_sm)->options_size = sizeof(struct uci_optmap); \
  52         for (_o = &(_sm)->options[0]; \
  53                  ((char *)(_o)) < ((char *) &(_sm)->options[0] + \
  54                         (_sm)->options_size * (_sm)->n_options); \
  55                  _o = (struct uci_optmap *) ((char *)(_o) + \
  56                         (_sm)->options_size))
  57
  58
  59 static inline bool
  60 ucimap_is_alloc(enum ucimap_type type)
  61 {
  62         switch(type & UCIMAP_SUBTYPE) {
  63         case UCIMAP_STRING:
  64                 return true;
  65         default:
  66                 return false;
  67         }
  68 }
  69
  70 static inline bool
  71 ucimap_is_fixup(enum ucimap_type type)
  72 {
  73         switch(type & UCIMAP_SUBTYPE) {
  74         case UCIMAP_SECTION:
  75                 return true;
  76         default:
  77                 return false;
  78         }
  79 }
  80
  81 static inline bool
  82 ucimap_is_simple(enum ucimap_type type)
  83 {
  84         return ((type & UCIMAP_TYPE) == UCIMAP_SIMPLE);
  85 }
  86
  87 static inline bool
  88 ucimap_is_list(enum ucimap_type type)
  89 {
  90         return ((type & UCIMAP_TYPE) == UCIMAP_LIST);
  91 }
  92
  93 static inline bool
  94 ucimap_is_list_auto(enum ucimap_type type)
  95 {
  96         return ucimap_is_list(type) && !!(type & UCIMAP_LIST_AUTO);
  97 }
  98
  99 static inline bool
 100 ucimap_is_custom(enum ucimap_type type)
 101 {
 102         return ((type & UCIMAP_SUBTYPE) == UCIMAP_CUSTOM);
 103 }
 104
 105 static inline void *
 106 ucimap_section_ptr(struct ucimap_section_data *sd)
 107 {
 108         return ((char *) sd - sd->sm->smap_offset);
 109 }
 110
 111 static inline struct ucimap_section_data *
 112 ucimap_ptr_section(struct uci_sectionmap *sm, void *ptr) {
 113         ptr = (char *) ptr + sm->smap_offset;
 114         return ptr;
 115 }
 116
 117 static inline union ucimap_data *
 118 ucimap_get_data(struct ucimap_section_data *sd, struct uci_optmap *om)
 119 {
 120         void *data;
 121
 122         data = (char *) ucimap_section_ptr(sd) + om->offset;
 123         return data;
 124 }
 125
 126 int
 127 ucimap_init(struct uci_map *map)
 128 {
 129         map->fixup = NULL;
 130         map->sdata = NULL;
 131         map->fixup_tail = &map->fixup;
 132         map->sdata_tail = &map->sdata;
 133         return 0;
 134 }
 135
 136 static void
 137 ucimap_add_alloc(struct ucimap_section_data *sd, void *ptr)
 138 {
 139         struct ucimap_alloc *a = &sd->allocmap[sd->allocmap_len++];
 140         a->ptr = ptr;
 141 }
 142
 143 void
 144 ucimap_free_section(struct uci_map *map, struct ucimap_section_data *sd)
 145 {
 146         void *section;
 147         int i;
 148
 149         section = ucimap_section_ptr(sd);
 150         if (sd->ref)
 151                 *sd->ref = sd->next;
 152
 153         if (sd->sm->free)
 154                 sd->sm->free(map, section);
 155
 156         for (i = 0; i < sd->allocmap_len; i++) {
 157                 free(sd->allocmap[i].ptr);
 158         }
 159
 160         if (sd->alloc_custom) {
 161                 for (i = 0; i < sd->alloc_custom_len; i++) {
 162                         struct ucimap_alloc_custom *a = &sd->alloc_custom[i];
 163                         a->om->free(a->section, a->om, a->ptr);
 164                 }
 165                 free(sd->alloc_custom);
 166         }
 167
 168         free(sd->allocmap);
 169         free(sd);
 170 }
 171
 172 void
 173 ucimap_cleanup(struct uci_map *map)
 174 {
 175         struct ucimap_section_data *sd;
 176
 177         for (sd = map->sdata; sd; sd = sd->next) {
 178                 ucimap_free_section(map, sd);
 179         }
 180 }
 181
 182 static void *
 183 ucimap_find_section(struct uci_map *map, struct ucimap_fixup *f)
 184 {
 185         struct ucimap_section_data *sd;
 186
 187         for (sd = map->sdata; sd; sd = sd->next) {
 188                 if (sd->sm != f->sm)
 189                         continue;
 190                 if (strcmp(f->name, sd->section_name) != 0)
 191                         continue;
 192                 return ucimap_section_ptr(sd);
 193         }
 194         for (sd = map->pending; sd; sd = sd->next) {
 195                 if (sd->sm != f->sm)
 196                         continue;
 197                 if (strcmp(f->name, sd->section_name) != 0)
 198                         continue;
 199                 return ucimap_section_ptr(sd);
 200         }
 201         return NULL;
 202 }
 203
 204 static bool
 205 ucimap_handle_fixup(struct uci_map *map, struct ucimap_fixup *f)
 206 {
 207         void *ptr = ucimap_find_section(map, f);
 208         struct ucimap_list *list;
 209
 210         if (!ptr)
 211                 return false;
 212
 213         switch(f->type & UCIMAP_TYPE) {
 214         case UCIMAP_SIMPLE:
 215                 f->data->ptr = ptr;
 216                 break;
 217         case UCIMAP_LIST:
 218                 list = f->data->list;
 219                 list->item[list->n_items++].ptr = ptr;
 220                 break;
 221         }
 222         return true;
 223 }
 224
 225 void
 226 ucimap_free_item(struct ucimap_section_data *sd, void *item)
 227 {
 228         struct ucimap_alloc_custom *ac;
 229         struct ucimap_alloc *a;
 230         void *ptr = *((void **) item);
 231         int i;
 232
 233         if (!ptr)
 234                 return;
 235
 236         *((void **)item) = NULL;
 237         for (i = 0, a = sd->allocmap; i < sd->allocmap_len; i++, a++) {
 238                 if (a->ptr != ptr)
 239                         continue;
 240
 241                 if (i != sd->allocmap_len - 1)
 242                         a->ptr = sd->allocmap[sd->allocmap_len - 1].ptr;
 243
 244                 sd->allocmap_len--;
 245                 return;
 246         }
 247
 248         for (i = 0, ac = sd->alloc_custom; i < sd->alloc_custom_len; i++, ac++) {
 249                 if (ac->ptr != ptr)
 250                         continue;
 251
 252                 if (i != sd->alloc_custom_len - 1)
 253                         memcpy(ac, &sd->alloc_custom[sd->alloc_custom_len - 1],
 254                                 sizeof(struct ucimap_alloc_custom));
 255
 256                 ac->om->free(ac->section, ac->om, ac->ptr);
 257                 sd->alloc_custom_len--;
 258                 return;
 259         }
 260 }
 261
 262 int
 263 ucimap_resize_list(struct ucimap_section_data *sd, struct ucimap_list **list, int items)
 264 {
 265         struct ucimap_list *new;
 266         struct ucimap_alloc *a;
 267         int i, offset = 0;
 268         int size = sizeof(struct ucimap_list) + items * sizeof(union ucimap_data);
 269
 270         if (!*list) {
 271                 new = calloc(1, size);
 272
 273                 ucimap_add_alloc(sd, new);
 274                 goto set;
 275         }
 276
 277         for (i = 0, a = sd->allocmap; i < sd->allocmap_len; i++, a++) {
 278                 if (a->ptr != *list)
 279                         continue;
 280
 281                 goto realloc;
 282         }
 283         return -ENOENT;
 284
 285 realloc:
 286         if (items > (*list)->size)
 287                 offset = (items - (*list)->size) * sizeof(union ucimap_data);
 288
 289         a->ptr = realloc(a->ptr, size);
 290         if (offset)
 291                 memset((char *) a->ptr + offset, 0, size - offset);
 292         new = a->ptr;
 293
 294 set:
 295         new->size = items;
 296         *list = new;
 297         return 0;
 298 }
 299
 300 static void
 301 ucimap_add_fixup(struct ucimap_section_data *sd, union ucimap_data *data, struct uci_optmap *om, const char *str)
 302 {
 303         struct ucimap_fixup *f, tmp;
 304         struct uci_map *map = sd->map;
 305
 306         tmp.sm = om->data.sm;
 307         tmp.name = str;
 308         tmp.type = om->type;
 309         tmp.data = data;
 310         if (ucimap_handle_fixup(map, &tmp))
 311                 return;
 312
 313         f = malloc(sizeof(struct ucimap_fixup));
 314         if (!f)
 315                 return;
 316
 317         memcpy(f, &tmp, sizeof(tmp));
 318         f->next = NULL;
 319         *map->fixup_tail = f;
 320         map->fixup_tail = &f->next;
 321 }
 322
 323 static void
 324 ucimap_add_custom_alloc(struct ucimap_section_data *sd, struct uci_optmap *om, void *ptr)
 325 {
 326         struct ucimap_alloc_custom *a = &sd->alloc_custom[sd->alloc_custom_len++];
 327
 328         a->section = ucimap_section_ptr(sd);
 329         a->om = om;
 330         a->ptr = ptr;
 331 }
 332
 333 static void
 334 ucimap_add_value(union ucimap_data *data, struct uci_optmap *om, struct ucimap_section_data *sd, const char *str)
 335 {
 336         union ucimap_data tdata = *data;
 337         char *eptr = NULL;
 338         long lval;
 339         char *s;
 340         int val;
 341
 342         if (ucimap_is_list(om->type) && !ucimap_is_fixup(om->type)) {
 343                 if (unlikely(data->list->size <= data->list->n_items)) {
 344                         /* should not happen */
 345                         DPRINTF("ERROR: overflow while filling a list\n");
 346                         return;
 347                 }
 348
 349                 data = &data->list->item[data->list->n_items++];
 350         }
 351
 352         switch(om->type & UCIMAP_SUBTYPE) {
 353         case UCIMAP_STRING:
 354                 if ((om->data.s.maxlen > 0) &&
 355                         (strlen(str) > om->data.s.maxlen))
 356                         return;
 357
 358                 s = strdup(str);
 359                 tdata.s = s;
 360                 ucimap_add_alloc(sd, s);
 361                 break;
 362         case UCIMAP_BOOL:
 363                 if (!strcmp(str, "on"))
 364                         val = true;
 365                 else if (!strcmp(str, "1"))
 366                         val = true;
 367                 else if (!strcmp(str, "enabled"))
 368                         val = true;
 369                 else if (!strcmp(str, "off"))
 370                         val = false;
 371                 else if (!strcmp(str, "0"))
 372                         val = false;
 373                 else if (!strcmp(str, "disabled"))
 374                         val = false;
 375                 else
 376                         return;
 377
 378                 tdata.b = val;
 379                 break;
 380         case UCIMAP_INT:
 381                 lval = strtol(str, &eptr, om->data.i.base);
 382                 if (lval < INT_MIN || lval > INT_MAX)
 383                         return;
 384
 385                 if (!eptr || *eptr == '\0')
 386                         tdata.i = (int) lval;
 387                 else
 388                         return;
 389                 break;
 390         case UCIMAP_SECTION:
 391                 ucimap_add_fixup(sd, data, om, str);
 392                 return;
 393         case UCIMAP_CUSTOM:
 394                 tdata.s = (char *) data;
 395                 break;
 396         }
 397         if (om->parse) {
 398                 if (om->parse(ucimap_section_ptr(sd), om, &tdata, str) < 0)
 399                         return;
 400                 if (ucimap_is_custom(om->type) && om->free) {
 401                         if (tdata.ptr != data->ptr)
 402                                 ucimap_add_custom_alloc(sd, om, data->ptr);
 403                 }
 404         }
 405         if (ucimap_is_custom(om->type))
 406                 return;
 407         memcpy(data, &tdata, sizeof(union ucimap_data));
 408 }
 409
 410
 411 static void
 412 ucimap_convert_list(union ucimap_data *data, struct uci_optmap *om, struct ucimap_section_data *sd, const char *str)
 413 {
 414         char *s, *p;
 415
 416         s = strdup(str);
 417         if (!s)
 418                 return;
 419
 420         ucimap_add_alloc(sd, s);
 421
 422         do {
 423                 while (isspace(*s))
 424                         s++;
 425
 426                 if (!*s)
 427                         break;
 428
 429                 p = s;
 430                 while (*s && !isspace(*s))
 431                         s++;
 432
 433                 if (isspace(*s)) {
 434                         *s = 0;
 435                         s++;
 436                 }
 437
 438                 ucimap_add_value(data, om, sd, p);
 439         } while (*s);
 440 }
 441
 442 static int
 443 ucimap_parse_options(struct uci_map *map, struct uci_sectionmap *sm, struct ucimap_section_data *sd, struct uci_section *s)
 444 {
 445         struct uci_element *e, *l;
 446         struct uci_option *o;
 447         union ucimap_data *data;
 448
 449         uci_foreach_element(&s->options, e) {
 450                 struct uci_optmap *om = NULL, *tmp;
 451
 452                 ucimap_foreach_option(sm, tmp) {
 453                         if (strcmp(e->name, tmp->name) == 0) {
 454                                 om = tmp;
 455                                 break;
 456                         }
 457                 }
 458                 if (!om)
 459                         continue;
 460
 461                 data = ucimap_get_data(sd, om);
 462                 o = uci_to_option(e);
 463                 if ((o->type == UCI_TYPE_STRING) && ucimap_is_simple(om->type)) {
 464                         ucimap_add_value(data, om, sd, o->v.string);
 465                 } else if ((o->type == UCI_TYPE_LIST) && ucimap_is_list(om->type)) {
 466                         uci_foreach_element(&o->v.list, l) {
 467                                 ucimap_add_value(data, om, sd, l->name);
 468                         }
 469                 } else if ((o->type == UCI_TYPE_STRING) && ucimap_is_list_auto(om->type)) {
 470                         ucimap_convert_list(data, om, sd, o->v.string);
 471                 }
 472         }
 473
 474         return 0;
 475 }
 476
 477 static void
 478 ucimap_add_section_list(struct uci_map *map, struct ucimap_section_data *sd)
 479 {
 480         sd->ref = map->sdata_tail;
 481         *sd->ref = sd;
 482         map->sdata_tail = &sd->next;
 483 }
 484
 485 static void
 486 ucimap_add_section(struct ucimap_section_data *sd)
 487 {
 488         struct uci_map *map = sd->map;
 489
 490         sd->next = NULL;
 491         if (sd->sm->add(map, ucimap_section_ptr(sd)) < 0)
 492                 ucimap_free_section(map, sd);
 493         else
 494                 ucimap_add_section_list(map, sd);
 495 }
 496
 497 #ifdef UCI_DEBUG
 498 static const char *ucimap_type_names[] = {
 499         [UCIMAP_STRING] = "string",
 500         [UCIMAP_INT] = "integer",
 501         [UCIMAP_BOOL] = "boolean",
 502         [UCIMAP_SECTION] = "section",
 503         [UCIMAP_LIST] = "list",
 504 };
 505
 506 static const char *
 507 ucimap_get_type_name(int type)
 508 {
 509         static char buf[32];
 510         const char *name;
 511
 512         if (ucimap_is_list(type))
 513                 return ucimap_type_names[UCIMAP_LIST];
 514
 515         name = ucimap_type_names[type & UCIMAP_SUBTYPE];
 516         if (!name) {
 517                 sprintf(buf, "Unknown (%d)", type & UCIMAP_SUBTYPE);
 518                 name = buf;
 519         }
 520
 521         return name;
 522 }
 523 #endif
 524
 525 static bool
 526 ucimap_check_optmap_type(struct uci_sectionmap *sm, struct uci_optmap *om)
 527 {
 528         unsigned int type;
 529
 530         if (unlikely(sm->type_name != om->type_name) &&
 531             unlikely(strcmp(sm->type_name, om->type_name) != 0)) {
 532                 DPRINTF("Option '%s' of section type '%s' refereces unknown "
 533                         "section type '%s', should be '%s'.\n",
 534                         om->name, sm->type, om->type_name, sm->type_name);
 535                 return false;
 536         }
 537
 538         if (om->detected_type < 0)
 539                 return true;
 540
 541         if (ucimap_is_custom(om->type))
 542                 return true;
 543
 544         if (ucimap_is_list(om->type) !=
 545             ucimap_is_list(om->detected_type))
 546                 goto failed;
 547
 548         if (ucimap_is_list(om->type))
 549                 return true;
 550
 551         type = om->type & UCIMAP_SUBTYPE;
 552         switch(type) {
 553         case UCIMAP_STRING:
 554         case UCIMAP_INT:
 555         case UCIMAP_BOOL:
 556                 if (type != om->detected_type)
 557                         goto failed;
 558                 break;
 559         case UCIMAP_SECTION:
 560                 goto failed;
 561         default:
 562                 break;
 563         }
 564         return true;
 565
 566 failed:
 567         DPRINTF("Invalid type in option '%s' of section type '%s', "
 568                 "declared type is %s, detected type is %s\n",
 569                 om->name, sm->type,
 570                 ucimap_get_type_name(om->type),
 571                 ucimap_get_type_name(om->detected_type));
 572         return false;
 573 }
 574
 575 static void
 576 ucimap_count_alloc(struct uci_optmap *om, int *n_alloc, int *n_custom)
 577 {
 578         if (ucimap_is_alloc(om->type))
 579                 (*n_alloc)++;
 580         else if (ucimap_is_custom(om->type) && om->free)
 581                 (*n_custom)++;
 582 }
 583
 584 int
 585 ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucimap_section_data *sd, struct uci_section *s)
 586 {
 587         struct uci_optmap *om;
 588         char *section_name;
 589         void *section;
 590         int n_alloc = 2;
 591         int n_alloc_custom = 0;
 592         int err;
 593
 594         sd->map = map;
 595         sd->sm = sm;
 596
 597         ucimap_foreach_option(sm, om) {
 598                 if (!ucimap_check_optmap_type(sm, om))
 599                         continue;
 600
 601                 if (ucimap_is_list(om->type)) {
 602                         union ucimap_data *data;
 603                         struct uci_element *e;
 604                         int n_elements = 0;
 605                         int n_elements_custom = 0;
 606                         int size;
 607
 608                         data = ucimap_get_data(sd, om);
 609                         uci_foreach_element(&s->options, e) {
 610                                 struct uci_option *o = uci_to_option(e);
 611                                 struct uci_element *tmp;
 612
 613                                 if (strcmp(e->name, om->name) != 0)
 614                                         continue;
 615
 616                                 if (o->type == UCI_TYPE_LIST) {
 617                                         uci_foreach_element(&o->v.list, tmp) {
 618                                                 ucimap_count_alloc(om, &n_elements, &n_elements_custom);
 619                                         }
 620                                 } else if ((o->type == UCI_TYPE_STRING) &&
 621                                            ucimap_is_list_auto(om->type)) {
 622                                         const char *data = o->v.string;
 623                                         do {
 624                                                 while (isspace(*data))
 625                                                         data++;
 626
 627                                                 if (!*data)
 628                                                         break;
 629
 630                                                 n_elements++;
 631                                                 ucimap_count_alloc(om, &n_elements, &n_elements_custom);
 632
 633                                                 while (*data && !isspace(*data))
 634                                                         data++;
 635                                         } while (*data);
 636
 637                                         /* for the duplicated data string */
 638                                         if (n_elements)
 639                                                 n_alloc++;
 640                                 }
 641                                 break;
 642                         }
 643                         /* add one more for the ucimap_list */
 644                         n_alloc += n_elements + 1;
 645                         n_alloc_custom += n_elements_custom;
 646                         size = sizeof(struct ucimap_list) +
 647                                 n_elements * sizeof(union ucimap_data);
 648
 649                         data->list = malloc(size);
 650                         if (!data->list)
 651                                 goto error_mem;
 652
 653                         memset(data->list, 0, size);
 654                         data->list->size = n_elements;
 655                 } else {
 656                         ucimap_count_alloc(om, &n_alloc, &n_alloc_custom);
 657                 }
 658         }
 659
 660         sd->allocmap = calloc(n_alloc, sizeof(struct ucimap_alloc));
 661         if (!sd->allocmap)
 662                 goto error_mem;
 663
 664         if (n_alloc_custom > 0) {
 665                 sd->alloc_custom = calloc(n_alloc_custom, sizeof(struct ucimap_alloc_custom));
 666                 if (!sd->alloc_custom)
 667                         goto error_mem;
 668         }
 669
 670         section_name = strdup(s->e.name);
 671         if (!section_name)
 672                 goto error_mem;
 673
 674         sd->section_name = section_name;
 675
 676         sd->cmap = calloc(1, BITFIELD_SIZE(sm->n_options));
 677         if (!sd->cmap)
 678                 goto error_mem;
 679
 680         ucimap_add_alloc(sd, (void *)section_name);
 681         ucimap_add_alloc(sd, (void *)sd->cmap);
 682         ucimap_foreach_option(sm, om) {
 683                 if (!ucimap_is_list(om->type))
 684                         continue;
 685
 686                 ucimap_add_alloc(sd, ucimap_get_data(sd, om)->list);
 687         }
 688
 689         section = ucimap_section_ptr(sd);
 690         err = sm->init(map, section, s);
 691         if (err)
 692                 goto error;
 693
 694         if (map->parsed) {
 695                 ucimap_add_section(sd);
 696         } else {
 697                 ucimap_add_section_list(map, sd);
 698         }
 699
 700         err = ucimap_parse_options(map, sm, sd, s);
 701         if (err)
 702                 goto error;
 703
 704         return 0;
 705
 706 error_mem:
 707         if (sd->allocmap)
 708                 free(sd->allocmap);
 709         free(sd);
 710         return UCI_ERR_MEM;
 711
 712 error:
 713         ucimap_free_section(map, sd);
 714         return err;
 715 }
 716
 717 static int
 718 ucimap_fill_ptr(struct uci_ptr *ptr, struct uci_section *s, const char *option)
 719 {
 720         struct uci_package *p = s->package;
 721
 722         memset(ptr, 0, sizeof(struct uci_ptr));
 723
 724         ptr->package = p->e.name;
 725         ptr->p = p;
 726
 727         ptr->section = s->e.name;
 728         ptr->s = s;
 729
 730         ptr->option = option;
 731         return uci_lookup_ptr(p->ctx, ptr, NULL, false);
 732 }
 733
 734 void
 735 ucimap_set_changed(struct ucimap_section_data *sd, void *field)
 736 {
 737         void *section = ucimap_section_ptr(sd);
 738         struct uci_sectionmap *sm = sd->sm;
 739         struct uci_optmap *om;
 740         int ofs = (char *)field - (char *)section;
 741         int i = 0;
 742
 743         ucimap_foreach_option(sm, om) {
 744                 if (om->offset == ofs) {
 745                         SET_BIT(sd->cmap, i);
 746                         break;
 747                 }
 748                 i++;
 749         }
 750 }
 751
 752 static char *
 753 ucimap_data_to_string(struct ucimap_section_data *sd, struct uci_optmap *om, union ucimap_data *data)
 754 {
 755         static char buf[32];
 756         char *str = NULL;
 757
 758         switch(om->type & UCIMAP_SUBTYPE) {
 759         case UCIMAP_STRING:
 760                 str = data->s;
 761                 break;
 762         case UCIMAP_INT:
 763                 sprintf(buf, "%d", data->i);
 764                 str = buf;
 765                 break;
 766         case UCIMAP_BOOL:
 767                 sprintf(buf, "%d", !!data->b);
 768                 str = buf;
 769                 break;
 770         case UCIMAP_SECTION:
 771                 if (data->ptr)
 772                         str = (char *) ucimap_ptr_section(om->data.sm, data->ptr)->section_name;
 773                 else
 774                         str = "";
 775                 break;
 776         case UCIMAP_CUSTOM:
 777                 break;
 778         default:
 779                 return NULL;
 780         }
 781
 782         if (om->format) {
 783                 union ucimap_data tdata;
 784
 785                 if (ucimap_is_custom(om->type)) {
 786                         tdata.s = (char *)data;
 787                         data = &tdata;
 788                 }
 789
 790                 if (om->format(ucimap_section_ptr(sd), om, data, &str) < 0)
 791                         return NULL;
 792
 793                 if (!str)
 794                         str = "";
 795         }
 796         return str;
 797 }
 798
 799 int
 800 ucimap_store_section(struct uci_map *map, struct uci_package *p, struct ucimap_section_data *sd)
 801 {
 802         struct uci_sectionmap *sm = sd->sm;
 803         struct uci_section *s = NULL;
 804         struct uci_optmap *om;
 805         struct uci_element *e;
 806         struct uci_ptr ptr;
 807         int i = 0;
 808         int ret;
 809
 810         uci_foreach_element(&p->sections, e) {
 811                 if (!strcmp(e->name, sd->section_name)) {
 812                         s = uci_to_section(e);
 813                         break;
 814                 }
 815         }
 816         if (!s)
 817                 return UCI_ERR_NOTFOUND;
 818
 819         ucimap_foreach_option(sm, om) {
 820                 union ucimap_data *data;
 821
 822                 i++;
 823                 data = ucimap_get_data(sd, om);
 824                 if (!TEST_BIT(sd->cmap, i - 1))
 825                         continue;
 826
 827                 ucimap_fill_ptr(&ptr, s, om->name);
 828                 if (ucimap_is_list(om->type)) {
 829                         struct ucimap_list *list = data->list;
 830                         bool first = true;
 831                         int j;
 832
 833                         for (j = 0; j < list->n_items; j++) {
 834                                 ptr.value = ucimap_data_to_string(sd, om, &list->item[j]);
 835                                 if (!ptr.value)
 836                                         continue;
 837
 838                                 if (first) {
 839                                         ret = uci_set(s->package->ctx, &ptr);
 840                                         first = false;
 841                                 } else {
 842                                         ret = uci_add_list(s->package->ctx, &ptr);
 843                                 }
 844                                 if (ret)
 845                                         return ret;
 846                         }
 847                 } else {
 848                         ptr.value = ucimap_data_to_string(sd, om, data);
 849                         if (!ptr.value)
 850                                 continue;
 851
 852                         ret = uci_set(s->package->ctx, &ptr);
 853                         if (ret)
 854                                 return ret;
 855                 }
 856
 857                 CLR_BIT(sd->cmap, i - 1);
 858         }
 859
 860         return 0;
 861 }
 862
 863 void
 864 ucimap_parse(struct uci_map *map, struct uci_package *pkg)
 865 {
 866         struct uci_element *e;
 867         struct ucimap_section_data *sd, **sd_tail;
 868         struct ucimap_fixup *f;
 869         int i;
 870
 871         sd_tail = map->sdata_tail;
 872         map->parsed = false;
 873         map->sdata_tail = &map->pending;
 874         uci_foreach_element(&pkg->sections, e) {
 875                 struct uci_section *s = uci_to_section(e);
 876
 877                 for (i = 0; i < map->n_sections; i++) {
 878                         struct uci_sectionmap *sm = map->sections[i];
 879                         struct ucimap_section_data *sd;
 880
 881                         if (strcmp(s->type, map->sections[i]->type) != 0)
 882                                 continue;
 883
 884                         if (sm->alloc) {
 885                                 sd = sm->alloc(map, sm, s);
 886                                 memset(sd, 0, sizeof(struct ucimap_section_data));
 887                         } else {
 888                                 sd = malloc(sm->alloc_len);
 889                                 memset(sd, 0, sm->alloc_len);
 890                         }
 891                         if (!sd)
 892                                 continue;
 893
 894                         ucimap_parse_section(map, sm, sd, s);
 895                 }
 896         }
 897         if (!map->parsed) {
 898                 map->parsed = true;
 899                 map->sdata_tail = sd_tail;
 900         }
 901
 902         f = map->fixup;
 903         while (f) {
 904                 struct ucimap_fixup *next = f->next;
 905                 ucimap_handle_fixup(map, f);
 906                 free(f);
 907                 f = next;
 908         }
 909         map->fixup_tail = &map->fixup;
 910         map->fixup = NULL;
 911
 912         sd = map->pending;
 913         while (sd) {
 914                 struct ucimap_section_data *next = sd->next;
 915                 ucimap_add_section(sd);
 916                 sd = next;
 917         }
 918         map->pending = NULL;
 919 }