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 Lesser 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         return (type & UCIMAP_SUBTYPE) == UCIMAP_STRING;
  63 }
  64
  65 static inline bool
  66 ucimap_is_fixup(enum ucimap_type type)
  67 {
  68         return (type & UCIMAP_SUBTYPE) == UCIMAP_SECTION;
  69 }
  70
  71 static inline bool
  72 ucimap_is_simple(enum ucimap_type type)
  73 {
  74         return ((type & UCIMAP_TYPE) == UCIMAP_SIMPLE);
  75 }
  76
  77 static inline bool
  78 ucimap_is_list(enum ucimap_type type)
  79 {
  80         return ((type & UCIMAP_TYPE) == UCIMAP_LIST);
  81 }
  82
  83 static inline bool
  84 ucimap_is_list_auto(enum ucimap_type type)
  85 {
  86         return ucimap_is_list(type) && !!(type & UCIMAP_LIST_AUTO);
  87 }
  88
  89 static inline bool
  90 ucimap_is_custom(enum ucimap_type type)
  91 {
  92         return ((type & UCIMAP_SUBTYPE) == UCIMAP_CUSTOM);
  93 }
  94
  95 static inline void *
  96 ucimap_section_ptr(struct ucimap_section_data *sd)
  97 {
  98         return ((char *) sd - sd->sm->smap_offset);
  99 }
 100
 101 static inline struct ucimap_section_data *
 102 ucimap_ptr_section(struct uci_sectionmap *sm, void *ptr) {
 103         ptr = (char *) ptr + sm->smap_offset;
 104         return ptr;
 105 }
 106
 107 static inline union ucimap_data *
 108 ucimap_get_data(struct ucimap_section_data *sd, struct uci_optmap *om)
 109 {
 110         void *data;
 111
 112         data = (char *) ucimap_section_ptr(sd) + om->offset;
 113         return data;
 114 }
 115
 116 int
 117 ucimap_init(struct uci_map *map)
 118 {
 119         map->fixup = NULL;
 120         map->sdata = NULL;
 121         map->fixup_tail = &map->fixup;
 122         map->sdata_tail = &map->sdata;
 123         return 0;
 124 }
 125
 126 static void
 127 ucimap_add_alloc(struct ucimap_section_data *sd, void *ptr)
 128 {
 129         struct ucimap_alloc *a = &sd->allocmap[sd->allocmap_len++];
 130         a->ptr = ptr;
 131 }
 132
 133 void
 134 ucimap_free_section(struct uci_map *map, struct ucimap_section_data *sd)
 135 {
 136         void *section;
 137         unsigned int i;
 138
 139         section = ucimap_section_ptr(sd);
 140         if (sd->ref)
 141                 *sd->ref = sd->next;
 142
 143         if (sd->sm->free)
 144                 sd->sm->free(map, section);
 145
 146         for (i = 0; i < sd->allocmap_len; i++) {
 147                 free(sd->allocmap[i].ptr);
 148         }
 149
 150         if (sd->alloc_custom) {
 151                 for (i = 0; i < sd->alloc_custom_len; i++) {
 152                         struct ucimap_alloc_custom *a = &sd->alloc_custom[i];
 153                         a->om->free(a->section, a->om, a->ptr);
 154                 }
 155                 free(sd->alloc_custom);
 156         }
 157
 158         free(sd->allocmap);
 159         free(sd);
 160 }
 161
 162 void
 163 ucimap_cleanup(struct uci_map *map)
 164 {
 165         struct ucimap_section_data *sd, *sd_next;
 166
 167         for (sd = map->sdata; sd; sd = sd_next) {
 168                 sd_next = sd->next;
 169                 ucimap_free_section(map, sd);
 170         }
 171 }
 172
 173 static void *
 174 ucimap_find_section(struct uci_map *map, struct ucimap_fixup *f)
 175 {
 176         struct ucimap_section_data *sd;
 177
 178         for (sd = map->sdata; sd; sd = sd->next) {
 179                 if (sd->sm != f->sm)
 180                         continue;
 181                 if (strcmp(f->name, sd->section_name) != 0)
 182                         continue;
 183                 return ucimap_section_ptr(sd);
 184         }
 185         for (sd = map->pending; sd; sd = sd->next) {
 186                 if (sd->sm != f->sm)
 187                         continue;
 188                 if (strcmp(f->name, sd->section_name) != 0)
 189                         continue;
 190                 return ucimap_section_ptr(sd);
 191         }
 192         return NULL;
 193 }
 194
 195 static union ucimap_data *
 196 ucimap_list_append(struct ucimap_list *list)
 197 {
 198         if (unlikely(list->size <= list->n_items)) {
 199                 /* should not happen */
 200                 DPRINTF("ERROR: overflow while filling a list (size=%d)\n", list->size);
 201                 return NULL;
 202         }
 203         return &list->item[list->n_items++];
 204 }
 205
 206
 207 static bool
 208 ucimap_handle_fixup(struct uci_map *map, struct ucimap_fixup *f)
 209 {
 210         void *ptr = ucimap_find_section(map, f);
 211         union ucimap_data *data;
 212
 213         if (!ptr)
 214                 return false;
 215
 216         switch(f->type & UCIMAP_TYPE) {
 217         case UCIMAP_SIMPLE:
 218                 f->data->ptr = ptr;
 219                 break;
 220         case UCIMAP_LIST:
 221                 data = ucimap_list_append(f->data->list);
 222                 if (!data)
 223                         return false;
 224
 225                 data->ptr = ptr;
 226                 break;
 227         }
 228         return true;
 229 }
 230
 231 void
 232 ucimap_free_item(struct ucimap_section_data *sd, void *item)
 233 {
 234         struct ucimap_alloc_custom *ac;
 235         struct ucimap_alloc *a;
 236         void *ptr = *((void **) item);
 237         unsigned int i;
 238
 239         if (!ptr)
 240                 return;
 241
 242         *((void **)item) = NULL;
 243         for (i = 0, a = sd->allocmap; i < sd->allocmap_len; i++, a++) {
 244                 if (a->ptr != ptr)
 245                         continue;
 246
 247                 if (i != sd->allocmap_len - 1)
 248                         a->ptr = sd->allocmap[sd->allocmap_len - 1].ptr;
 249
 250                 sd->allocmap_len--;
 251                 return;
 252         }
 253
 254         for (i = 0, ac = sd->alloc_custom; i < sd->alloc_custom_len; i++, ac++) {
 255                 if (ac->ptr != ptr)
 256                         continue;
 257
 258                 if (i != sd->alloc_custom_len - 1)
 259                         memcpy(ac, &sd->alloc_custom[sd->alloc_custom_len - 1],
 260                                 sizeof(struct ucimap_alloc_custom));
 261
 262                 ac->om->free(ac->section, ac->om, ac->ptr);
 263                 sd->alloc_custom_len--;
 264                 return;
 265         }
 266 }
 267
 268 int
 269 ucimap_resize_list(struct ucimap_section_data *sd, struct ucimap_list **list, int items)
 270 {
 271         struct ucimap_list *new;
 272         struct ucimap_alloc *a;
 273         unsigned int i;
 274         int offset = 0;
 275         int size = sizeof(struct ucimap_list) + items * sizeof(union ucimap_data);
 276
 277         if (!*list) {
 278                 new = calloc(1, size);
 279                 if (!new)
 280                         return -ENOMEM;
 281
 282                 ucimap_add_alloc(sd, new);
 283                 goto set;
 284         }
 285
 286         for (i = 0, a = sd->allocmap; i < sd->allocmap_len; i++, a++) {
 287                 if (a->ptr != *list)
 288                         continue;
 289
 290                 goto realloc;
 291         }
 292         return -ENOENT;
 293
 294 realloc:
 295         if (items > (*list)->size)
 296                 offset = (items - (*list)->size) * sizeof(union ucimap_data);
 297
 298         a->ptr = realloc(a->ptr, size);
 299         if (!a->ptr)
 300                 return -ENOMEM;
 301
 302         if (offset)
 303                 memset((char *) a->ptr + offset, 0, size - offset);
 304         new = a->ptr;
 305
 306 set:
 307         new->size = items;
 308         *list = new;
 309         return 0;
 310 }
 311
 312 static void
 313 ucimap_add_fixup(struct ucimap_section_data *sd, union ucimap_data *data, struct uci_optmap *om, const char *str)
 314 {
 315         struct ucimap_fixup *f, tmp;
 316         struct uci_map *map = sd->map;
 317
 318         tmp.next = NULL;
 319         tmp.sm = om->data.sm;
 320         tmp.name = str;
 321         tmp.type = om->type;
 322         tmp.data = data;
 323         if (ucimap_handle_fixup(map, &tmp))
 324                 return;
 325
 326         f = malloc(sizeof(struct ucimap_fixup));
 327         if (!f)
 328                 return;
 329
 330         memcpy(f, &tmp, sizeof(tmp));
 331         f->next = NULL;
 332         *map->fixup_tail = f;
 333         map->fixup_tail = &f->next;
 334 }
 335
 336 static void
 337 ucimap_add_custom_alloc(struct ucimap_section_data *sd, struct uci_optmap *om, void *ptr)
 338 {
 339         struct ucimap_alloc_custom *a = &sd->alloc_custom[sd->alloc_custom_len++];
 340
 341         a->section = ucimap_section_ptr(sd);
 342         a->om = om;
 343         a->ptr = ptr;
 344 }
 345
 346 static void
 347 ucimap_add_value(union ucimap_data *data, struct uci_optmap *om, struct ucimap_section_data *sd, const char *str)
 348 {
 349         union ucimap_data tdata = *data;
 350         char *eptr = NULL;
 351         long lval;
 352         char *s;
 353         int val;
 354
 355         if (ucimap_is_list(om->type) && !ucimap_is_fixup(om->type)) {
 356                 data = ucimap_list_append(data->list);
 357                 if (!data)
 358                         return;
 359         }
 360
 361         switch(om->type & UCIMAP_SUBTYPE) {
 362         case UCIMAP_STRING:
 363                 if ((om->data.s.maxlen > 0) &&
 364                         (strlen(str) > (unsigned) om->data.s.maxlen))
 365                         return;
 366
 367                 s = strdup(str);
 368                 tdata.s = s;
 369                 ucimap_add_alloc(sd, s);
 370                 break;
 371         case UCIMAP_BOOL:
 372                 if (!strcmp(str, "on"))
 373                         val = true;
 374                 else if (!strcmp(str, "1"))
 375                         val = true;
 376                 else if (!strcmp(str, "enabled"))
 377                         val = true;
 378                 else if (!strcmp(str, "off"))
 379                         val = false;
 380                 else if (!strcmp(str, "0"))
 381                         val = false;
 382                 else if (!strcmp(str, "disabled"))
 383                         val = false;
 384                 else
 385                         return;
 386
 387                 tdata.b = val;
 388                 break;
 389         case UCIMAP_INT:
 390                 lval = strtol(str, &eptr, om->data.i.base);
 391                 if (lval < INT_MIN || lval > INT_MAX)
 392                         return;
 393
 394                 if (!eptr || *eptr == '\0')
 395                         tdata.i = (int) lval;
 396                 else
 397                         return;
 398                 break;
 399         case UCIMAP_SECTION:
 400                 ucimap_add_fixup(sd, data, om, str);
 401                 return;
 402         case UCIMAP_CUSTOM:
 403                 break;
 404         }
 405         if (om->parse) {
 406                 if (om->parse(ucimap_section_ptr(sd), om, data, str) < 0)
 407                         return;
 408                 if (ucimap_is_custom(om->type) && om->free) {
 409                         if (tdata.ptr != data->ptr)
 410                                 ucimap_add_custom_alloc(sd, om, data->ptr);
 411                 }
 412         }
 413         if (ucimap_is_custom(om->type))
 414                 return;
 415         memcpy(data, &tdata, sizeof(union ucimap_data));
 416 }
 417
 418
 419 static void
 420 ucimap_convert_list(union ucimap_data *data, struct uci_optmap *om, struct ucimap_section_data *sd, const char *str)
 421 {
 422         char *s, *p;
 423
 424         s = strdup(str);
 425         if (!s)
 426                 return;
 427
 428         ucimap_add_alloc(sd, s);
 429
 430         do {
 431                 while (isspace(*s))
 432                         s++;
 433
 434                 if (!*s)
 435                         break;
 436
 437                 p = s;
 438                 while (*s && !isspace(*s))
 439                         s++;
 440
 441                 if (isspace(*s)) {
 442                         *s = 0;
 443                         s++;
 444                 }
 445
 446                 ucimap_add_value(data, om, sd, p);
 447         } while (*s);
 448 }
 449
 450 static int
 451 ucimap_parse_options(struct uci_map *map, struct uci_sectionmap *sm, struct ucimap_section_data *sd, struct uci_section *s)
 452 {
 453         struct uci_element *e, *l;
 454         struct uci_option *o;
 455         union ucimap_data *data;
 456
 457         uci_foreach_element(&s->options, e) {
 458                 struct uci_optmap *om = NULL, *tmp;
 459
 460                 ucimap_foreach_option(sm, tmp) {
 461                         if (strcmp(e->name, tmp->name) == 0) {
 462                                 om = tmp;
 463                                 break;
 464                         }
 465                 }
 466                 if (!om)
 467                         continue;
 468
 469                 data = ucimap_get_data(sd, om);
 470                 o = uci_to_option(e);
 471                 if ((o->type == UCI_TYPE_STRING) && ucimap_is_simple(om->type)) {
 472                         ucimap_add_value(data, om, sd, o->v.string);
 473                 } else if ((o->type == UCI_TYPE_LIST) && ucimap_is_list(om->type)) {
 474                         uci_foreach_element(&o->v.list, l) {
 475                                 ucimap_add_value(data, om, sd, l->name);
 476                         }
 477                 } else if ((o->type == UCI_TYPE_STRING) && ucimap_is_list_auto(om->type)) {
 478                         ucimap_convert_list(data, om, sd, o->v.string);
 479                 }
 480         }
 481
 482         return 0;
 483 }
 484
 485 static void
 486 ucimap_add_section_list(struct uci_map *map, struct ucimap_section_data *sd)
 487 {
 488         sd->ref = map->sdata_tail;
 489         *sd->ref = sd;
 490         map->sdata_tail = &sd->next;
 491 }
 492
 493 static int
 494 ucimap_add_section(struct ucimap_section_data *sd)
 495 {
 496         int r;
 497         struct uci_map *map = sd->map;
 498
 499         sd->next = NULL;
 500         r = sd->sm->add(map, ucimap_section_ptr(sd));
 501         if (r < 0) {
 502                 ucimap_free_section(map, sd);
 503                 return r;
 504         } else
 505                 ucimap_add_section_list(map, sd);
 506
 507         return 0;
 508 }
 509
 510 #ifdef UCI_DEBUG
 511 static const char *ucimap_type_names[] = {
 512         [UCIMAP_STRING] = "string",
 513         [UCIMAP_INT] = "integer",
 514         [UCIMAP_BOOL] = "boolean",
 515         [UCIMAP_SECTION] = "section",
 516         [UCIMAP_LIST] = "list",
 517 };
 518
 519 static const char *
 520 ucimap_get_type_name(int type)
 521 {
 522         static char buf[32];
 523         const char *name;
 524
 525         if (ucimap_is_list(type))
 526                 return ucimap_type_names[UCIMAP_LIST];
 527
 528         name = ucimap_type_names[type & UCIMAP_SUBTYPE];
 529         if (!name) {
 530                 sprintf(buf, "Unknown (%d)", type & UCIMAP_SUBTYPE);
 531                 name = buf;
 532         }
 533
 534         return name;
 535 }
 536 #endif
 537
 538 static bool
 539 ucimap_check_optmap_type(struct uci_sectionmap *sm, struct uci_optmap *om)
 540 {
 541         int type;
 542
 543         if (unlikely(sm->type_name != om->type_name) &&
 544             unlikely(strcmp(sm->type_name, om->type_name) != 0)) {
 545                 DPRINTF("Option '%s' of section type '%s' refereces unknown "
 546                         "section type '%s', should be '%s'.\n",
 547                         om->name, sm->type, om->type_name, sm->type_name);
 548                 return false;
 549         }
 550
 551         if (om->detected_type < 0)
 552                 return true;
 553
 554         if (ucimap_is_custom(om->type))
 555                 return true;
 556
 557         if (ucimap_is_list(om->type) !=
 558             ucimap_is_list(om->detected_type))
 559                 goto failed;
 560
 561         if (ucimap_is_list(om->type))
 562                 return true;
 563
 564         type = om->type & UCIMAP_SUBTYPE;
 565         switch(type) {
 566         case UCIMAP_STRING:
 567         case UCIMAP_INT:
 568         case UCIMAP_BOOL:
 569                 if (type != om->detected_type)
 570                         goto failed;
 571                 break;
 572         case UCIMAP_SECTION:
 573                 goto failed;
 574         default:
 575                 break;
 576         }
 577         return true;
 578
 579 failed:
 580         DPRINTF("Invalid type in option '%s' of section type '%s', "
 581                 "declared type is %s, detected type is %s\n",
 582                 om->name, sm->type,
 583                 ucimap_get_type_name(om->type),
 584                 ucimap_get_type_name(om->detected_type));
 585         return false;
 586 }
 587
 588 static void
 589 ucimap_count_alloc(struct uci_optmap *om, int *n_alloc, int *n_custom)
 590 {
 591         if (ucimap_is_alloc(om->type))
 592                 (*n_alloc)++;
 593         else if (ucimap_is_custom(om->type) && om->free)
 594                 (*n_custom)++;
 595 }
 596
 597 int
 598 ucimap_parse_section(struct uci_map *map, struct uci_sectionmap *sm, struct ucimap_section_data *sd, struct uci_section *s)
 599 {
 600         struct uci_optmap *om;
 601         char *section_name;
 602         void *section;
 603         int n_alloc = 2;
 604         int n_alloc_custom = 0;
 605         int err;
 606
 607         sd->map = map;
 608         sd->sm = sm;
 609
 610         ucimap_foreach_option(sm, om) {
 611                 if (!ucimap_check_optmap_type(sm, om))
 612                         continue;
 613
 614                 if (ucimap_is_list(om->type)) {
 615                         union ucimap_data *data;
 616                         struct uci_element *e;
 617                         int n_elements = 0;
 618                         int n_elements_alloc = 0;
 619                         int n_elements_custom = 0;
 620                         int size;
 621
 622                         data = ucimap_get_data(sd, om);
 623                         uci_foreach_element(&s->options, e) {
 624                                 struct uci_option *o = uci_to_option(e);
 625                                 struct uci_element *tmp;
 626
 627                                 if (strcmp(e->name, om->name) != 0)
 628                                         continue;
 629
 630                                 if (o->type == UCI_TYPE_LIST) {
 631                                         uci_foreach_element(&o->v.list, tmp) {
 632                                                 ucimap_count_alloc(om, &n_elements_alloc, &n_elements_custom);
 633                                                 n_elements++;
 634                                         }
 635                                 } else if ((o->type == UCI_TYPE_STRING) &&
 636                                            ucimap_is_list_auto(om->type)) {
 637                                         const char *data = o->v.string;
 638                                         do {
 639                                                 while (isspace(*data))
 640                                                         data++;
 641
 642                                                 if (!*data)
 643                                                         break;
 644
 645                                                 n_elements++;
 646                                                 ucimap_count_alloc(om, &n_elements_alloc, &n_elements_custom);
 647
 648                                                 while (*data && !isspace(*data))
 649                                                         data++;
 650                                         } while (*data);
 651
 652                                         /* for the duplicated data string */
 653                                         if (n_elements)
 654                                                 n_alloc++;
 655                                 }
 656                                 break;
 657                         }
 658                         /* add one more for the ucimap_list */
 659                         n_alloc += n_elements_alloc + 1;
 660                         n_alloc_custom += n_elements_custom;
 661                         size = sizeof(struct ucimap_list) +
 662                                 n_elements * sizeof(union ucimap_data);
 663
 664                         data->list = malloc(size);
 665                         if (!data->list)
 666                                 goto error_mem;
 667
 668                         memset(data->list, 0, size);
 669                         data->list->size = n_elements;
 670                 } else {
 671                         ucimap_count_alloc(om, &n_alloc, &n_alloc_custom);
 672                 }
 673         }
 674
 675         sd->allocmap = calloc(n_alloc, sizeof(struct ucimap_alloc));
 676         if (!sd->allocmap)
 677                 goto error_mem;
 678
 679         if (n_alloc_custom > 0) {
 680                 sd->alloc_custom = calloc(n_alloc_custom, sizeof(struct ucimap_alloc_custom));
 681                 if (!sd->alloc_custom)
 682                         goto error_mem;
 683         }
 684
 685         section_name = strdup(s->e.name);
 686         if (!section_name)
 687                 goto error_mem;
 688
 689         sd->section_name = section_name;
 690
 691         sd->cmap = calloc(1, BITFIELD_SIZE(sm->n_options));
 692         if (!sd->cmap)
 693                 goto error_mem;
 694
 695         ucimap_add_alloc(sd, (void *)section_name);
 696         ucimap_add_alloc(sd, (void *)sd->cmap);
 697         ucimap_foreach_option(sm, om) {
 698                 if (!ucimap_is_list(om->type))
 699                         continue;
 700
 701                 ucimap_add_alloc(sd, ucimap_get_data(sd, om)->list);
 702         }
 703
 704         section = ucimap_section_ptr(sd);
 705         err = sm->init(map, section, s);
 706         if (err)
 707                 goto error;
 708
 709         if (map->parsed) {
 710                 err = ucimap_add_section(sd);
 711                 if (err)
 712                         return err;
 713         } else {
 714                 ucimap_add_section_list(map, sd);
 715         }
 716
 717         err = ucimap_parse_options(map, sm, sd, s);
 718         if (err)
 719                 goto error;
 720
 721         return 0;
 722
 723 error_mem:
 724         free(sd->alloc_custom);
 725         free(sd->allocmap);
 726         free(sd);
 727         return UCI_ERR_MEM;
 728
 729 error:
 730         ucimap_free_section(map, sd);
 731         return err;
 732 }
 733
 734 static int
 735 ucimap_fill_ptr(struct uci_ptr *ptr, struct uci_section *s, const char *option)
 736 {
 737         struct uci_package *p = s->package;
 738
 739         memset(ptr, 0, sizeof(struct uci_ptr));
 740
 741         ptr->package = p->e.name;
 742         ptr->p = p;
 743
 744         ptr->section = s->e.name;
 745         ptr->s = s;
 746
 747         ptr->option = option;
 748         return uci_lookup_ptr(p->ctx, ptr, NULL, false);
 749 }
 750
 751 void
 752 ucimap_set_changed(struct ucimap_section_data *sd, void *field)
 753 {
 754         void *section = ucimap_section_ptr(sd);
 755         struct uci_sectionmap *sm = sd->sm;
 756         struct uci_optmap *om;
 757         unsigned int ofs = (char *)field - (char *)section;
 758         int i = 0;
 759
 760         ucimap_foreach_option(sm, om) {
 761                 if (om->offset == ofs) {
 762                         SET_BIT(sd->cmap, i);
 763                         break;
 764                 }
 765                 i++;
 766         }
 767 }
 768
 769 static char *
 770 ucimap_data_to_string(struct ucimap_section_data *sd, struct uci_optmap *om, union ucimap_data *data)
 771 {
 772         static char buf[32];
 773         char *str = NULL;
 774
 775         switch(om->type & UCIMAP_SUBTYPE) {
 776         case UCIMAP_STRING:
 777                 str = data->s;
 778                 break;
 779         case UCIMAP_INT:
 780                 sprintf(buf, "%d", data->i);
 781                 str = buf;
 782                 break;
 783         case UCIMAP_BOOL:
 784                 sprintf(buf, "%d", !!data->b);
 785                 str = buf;
 786                 break;
 787         case UCIMAP_SECTION:
 788                 if (data->ptr)
 789                         str = (char *) ucimap_ptr_section(om->data.sm, data->ptr)->section_name;
 790                 else
 791                         str = "";
 792                 break;
 793         case UCIMAP_CUSTOM:
 794                 break;
 795         default:
 796                 return NULL;
 797         }
 798
 799         if (om->format) {
 800                 if (om->format(ucimap_section_ptr(sd), om, data, &str) < 0)
 801                         return NULL;
 802
 803                 if (!str)
 804                         str = "";
 805         }
 806         return str;
 807 }
 808
 809 int
 810 ucimap_store_section(struct uci_map *map, struct uci_package *p, struct ucimap_section_data *sd)
 811 {
 812         struct uci_sectionmap *sm = sd->sm;
 813         struct uci_section *s = NULL;
 814         struct uci_optmap *om;
 815         struct uci_element *e;
 816         struct uci_ptr ptr;
 817         int i = 0;
 818         int ret;
 819
 820         uci_foreach_element(&p->sections, e) {
 821                 if (!strcmp(e->name, sd->section_name)) {
 822                         s = uci_to_section(e);
 823                         break;
 824                 }
 825         }
 826         if (!s)
 827                 return UCI_ERR_NOTFOUND;
 828
 829         ucimap_foreach_option(sm, om) {
 830                 union ucimap_data *data;
 831
 832                 i++;
 833                 data = ucimap_get_data(sd, om);
 834                 if (!TEST_BIT(sd->cmap, i - 1))
 835                         continue;
 836
 837                 ucimap_fill_ptr(&ptr, s, om->name);
 838                 if (ucimap_is_list(om->type)) {
 839                         struct ucimap_list *list = data->list;
 840                         bool first = true;
 841                         int j;
 842
 843                         for (j = 0; j < list->n_items; j++) {
 844                                 ptr.value = ucimap_data_to_string(sd, om, &list->item[j]);
 845                                 if (!ptr.value)
 846                                         continue;
 847
 848                                 if (first) {
 849                                         ret = uci_set(s->package->ctx, &ptr);
 850                                         first = false;
 851                                 } else {
 852                                         ret = uci_add_list(s->package->ctx, &ptr);
 853                                 }
 854                                 if (ret)
 855                                         return ret;
 856                         }
 857                 } else {
 858                         ptr.value = ucimap_data_to_string(sd, om, data);
 859                         if (!ptr.value)
 860                                 continue;
 861
 862                         ret = uci_set(s->package->ctx, &ptr);
 863                         if (ret)
 864                                 return ret;
 865                 }
 866
 867                 CLR_BIT(sd->cmap, i - 1);
 868         }
 869
 870         return 0;
 871 }
 872
 873 void
 874 ucimap_parse(struct uci_map *map, struct uci_package *pkg)
 875 {
 876         struct uci_element *e;
 877         struct ucimap_section_data *sd, **sd_tail;
 878         struct ucimap_fixup *f;
 879         unsigned int i;
 880
 881         sd_tail = map->sdata_tail;
 882         map->parsed = false;
 883         map->sdata_tail = &map->pending;
 884         uci_foreach_element(&pkg->sections, e) {
 885                 struct uci_section *s = uci_to_section(e);
 886
 887                 for (i = 0; i < map->n_sections; i++) {
 888                         struct uci_sectionmap *sm = map->sections[i];
 889                         struct ucimap_section_data *sd;
 890
 891                         if (strcmp(s->type, map->sections[i]->type) != 0)
 892                                 continue;
 893
 894                         if (sm->alloc) {
 895                                 sd = sm->alloc(map, sm, s);
 896                                 memset(sd, 0, sizeof(struct ucimap_section_data));
 897                         } else {
 898                                 sd = malloc(sm->alloc_len);
 899                                 memset(sd, 0, sm->alloc_len);
 900                                 sd = ucimap_ptr_section(sm, sd);
 901                         }
 902                         if (!sd)
 903                                 continue;
 904
 905                         ucimap_parse_section(map, sm, sd, s);
 906                 }
 907         }
 908         if (!map->parsed) {
 909                 map->parsed = true;
 910                 map->sdata_tail = sd_tail;
 911         }
 912
 913         f = map->fixup;
 914         while (f) {
 915                 struct ucimap_fixup *next = f->next;
 916                 ucimap_handle_fixup(map, f);
 917                 free(f);
 918                 f = next;
 919         }
 920         map->fixup_tail = &map->fixup;
 921         map->fixup = NULL;
 922
 923         sd = map->pending;
 924         while (sd) {
 925                 struct ucimap_section_data *next = sd->next;
 926                 ucimap_add_section(sd);
 927                 sd = next;
 928         }
 929         map->pending = NULL;
 930 }