git.m6w6.name Git - m6w6/ext-psi/blob - src/context_validate.c

   1 #ifdef HAVE_CONFIG_H
   2 # include "config.h"
   3 #endif
   4
   5 #include "php.h"
   6
   7 #include <sys/param.h>
   8 #include <dlfcn.h>
   9
  10 #include "php_psi.h"
  11 #include "php_psi_stdinc.h"
  12 #include "php_psi_stdtypes.h"
  13 #include "php_psi_macros.h"
  14 #include "php_psi_redirs.h"
  15
  16 #include "calc.h"
  17 #include "marshal.h"
  18 #include "engine.h"
  19
  20 static int validate_lib(PSI_Data *data, void **dlopened) {
  21         char lib[MAXPATHLEN];
  22         const char *ptr = data->psi.file.ln;
  23         size_t len;
  24
  25         if (!ptr) {
  26                 /* FIXME: assume stdlib */
  27                 return 1;
  28         } else if (!strchr(ptr, '/')) {
  29                 len = snprintf(lib, MAXPATHLEN, "lib%s.%s", ptr, PHP_PSI_SHLIB_SUFFIX);
  30                 if (MAXPATHLEN == len) {
  31                         data->error(data, NULL, PSI_WARNING, "Library name too long: '%s'", ptr);
  32                 }
  33                 lib[len] = 0;
  34                 ptr = lib;
  35         }
  36         if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
  37                 data->error(data, NULL, PSI_WARNING, "Could not open library '%s': %s.",
  38                                 data->psi.file.ln, dlerror());
  39                 return 0;
  40         }
  41         return 1;
  42 }
  43
  44 static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
  45         size_t i;
  46         struct psi_std_type *stdtyp;
  47
  48         if (type->real) {
  49                 return 1;
  50         }
  51         if (defs) for (i = 0; i < defs->count; ++i) {
  52                 decl_arg *def = defs->list[i];
  53
  54                 if (def->type->type != type->type && !strcmp(def->var->name, type->name)) {
  55                         type->real = def->type;
  56                         return 1;
  57                 }
  58         }
  59         for (stdtyp = &psi_std_types[0]; stdtyp->type_tag; ++stdtyp) {
  60                 if (!strcmp(type->name, stdtyp->alias ?: stdtyp->type_name)) {
  61                         type->type = stdtyp->type_tag;
  62                         return 1;
  63                 }
  64         }
  65
  66         return 0;
  67 }
  68
  69 static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type) {
  70         size_t i;
  71
  72         if (type->strct) {
  73                 return 1;
  74         }
  75         if (structs) for (i = 0; i < structs->count; ++i) {
  76                 if (!strcmp(structs->list[i]->name, type->name)) {
  77                         type->strct = structs->list[i];
  78                         return 1;
  79                 }
  80         }
  81         return 0;
  82 }
  83
  84 static inline int locate_decl_type_union(decl_unions *unions, decl_type *type) {
  85         size_t i;
  86
  87         if (type->unn) {
  88                 return 1;
  89         }
  90         if (unions) for (i = 0; i < unions->count; ++i) {
  91                 if (!strcmp(unions->list[i]->name, type->name)) {
  92                         type->unn = unions->list[i];
  93                         return 1;
  94                 }
  95         }
  96         return 0;
  97 }
  98
  99 static inline int locate_decl_type_enum(decl_enums *enums, decl_type *type) {
 100         size_t i;
 101
 102         if (type->enm) {
 103                 return 1;
 104         }
 105         if (enums) for (i = 0; i < enums->count; ++i) {
 106                 if (!strcmp(enums->list[i]->name, type->name)) {
 107                         type->enm = enums->list[i];
 108                         return 1;
 109                 }
 110         }
 111         return 0;
 112 }
 113
 114 static inline int validate_decl_struct(PSI_Data *data, decl_struct *s);
 115 static inline int validate_decl_union(PSI_Data *data, decl_union *u);
 116 static inline int validate_decl_enum(PSI_Data *data, decl_enum *e);
 117
 118 static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
 119         switch (type->type) {
 120         case PSI_T_CHAR:
 121         case PSI_T_SHORT:
 122         case PSI_T_INT:
 123         case PSI_T_LONG:
 124         case PSI_T_NAME:
 125                 if (!locate_decl_type_alias(data->defs, type)) {
 126                         return 0;
 127                 }
 128                 if (type->real) {
 129                         return validate_decl_type(data, type->real);
 130                 }
 131                 return 1;
 132         case PSI_T_STRUCT:
 133                 if (!locate_decl_type_struct(data->structs, type)) {
 134                         return 0;
 135                 }
 136                 break;
 137         case PSI_T_UNION:
 138                 if (!locate_decl_type_union(data->unions, type)) {
 139                         return 0;
 140                 }
 141                 break;
 142         case PSI_T_ENUM:
 143                 if (!locate_decl_type_enum(data->enums, type)) {
 144                         return 0;
 145                 }
 146         }
 147         return 1;
 148 }
 149 static inline int validate_decl_typedef(PSI_Data *data, decl_arg *def) {
 150         if (!validate_decl_type(data, def->type)) {
 151                 data->error(data, def->token, PSI_WARNING,
 152                         "Type '%s' cannot be aliased to %s'%s'",
 153                         def->type->name, def->type->type == PSI_T_STRUCT?"struct ":"",
 154                         def->var->name);
 155                 return 0;
 156         }
 157         if (def->type->type == PSI_T_VOID && def->var->pointer_level) {
 158                 def->type->type = PSI_T_POINTER;
 159         }
 160         return 1;
 161 }
 162
 163 static inline int validate_constant(PSI_Data *data, constant *c) {
 164         /* FIXME */
 165         return 1;
 166 }
 167
 168 static inline int validate_decl_arg(PSI_Data *data, decl_arg *arg) {
 169         if (!validate_decl_type(data, arg->type)) {
 170                 data->error(data, arg->type->token, PSI_WARNING,
 171                         "Cannot use '%s' as type for '%s'",
 172                         arg->type->name, arg->var->name);
 173                 return 0;
 174         }
 175         return 1;
 176 }
 177
 178 static int psi_sort_struct_arg_cmp(const void *_a, const void *_b) {
 179         decl_arg *a = *(decl_arg **)_a, *b = *(decl_arg **)_b;
 180
 181         if (a->layout->pos == b->layout->pos) {
 182                 if (a->layout->len == b->layout->len) {
 183                         return 0;
 184                 } else if (a->layout->len > b->layout->len) {
 185                         return -1;
 186                 } else {
 187                         return 1;
 188                 }
 189         } else if (a->layout->pos > b->layout->pos) {
 190                 return 1;
 191         } else {
 192                 return -1;
 193         }
 194 }
 195 static void psi_sort_struct_arg_swp(void *a, void *b) {
 196         decl_arg **_a = a, **_b = b, *_c;
 197
 198         _c = *_b;
 199         *_b = *_a;
 200         *_a = _c;
 201 }
 202 static inline void psi_sort_struct_args(void **args, size_t count) {
 203         zend_insert_sort(args, count, sizeof(*args),
 204                         psi_sort_struct_arg_cmp, psi_sort_struct_arg_swp);
 205 }
 206
 207 static inline int validate_decl_struct_darg(PSI_Data *data, decl_arg *darg, void *current) {
 208         decl_type *real = real_decl_type(darg->type);
 209
 210         /* pre-validate any structs/unions/enums */
 211         switch (real->type) {
 212         case PSI_T_STRUCT:
 213                 if (current && current == real->strct) {
 214                         return 1;
 215                 }
 216                 if (!validate_decl_struct(data, real->strct)) {
 217                         return 0;
 218                 }
 219                 break;
 220         case PSI_T_UNION:
 221                 if (current && current == real->unn) {
 222                         return 1;
 223                 }
 224                 if (!validate_decl_union(data, real->unn)) {
 225                         return 0;
 226                 }
 227                 break;
 228         case PSI_T_ENUM:
 229                 if (current && current == real->enm) {
 230                         return 1;
 231                 }
 232                 if (!validate_decl_enum(data, real->enm)) {
 233                         return 0;
 234                 }
 235                 break;
 236         }
 237
 238         return 1;
 239 }
 240
 241 static inline size_t sizeof_decl_arg(decl_arg *darg) {
 242         size_t size;
 243         decl_type *real = real_decl_type(darg->type);
 244
 245         if (darg->var->array_size) {
 246                 if (darg->var->pointer_level > 2) {
 247                         size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
 248                 } else {
 249                         size = psi_t_size(real->type) * darg->var->array_size;
 250                 }
 251         } else if (darg->var->pointer_level) {
 252                 size = psi_t_size(PSI_T_POINTER);
 253         } else {
 254                 switch (real->type) {
 255                 case PSI_T_UNION:
 256                         size = real->unn->size;
 257                         break;
 258                 case PSI_T_STRUCT:
 259                         size = real->strct->size;
 260                         break;
 261                 case PSI_T_ENUM:
 262                 default:
 263                         size = psi_t_size(real->type);
 264                         break;
 265                 }
 266         }
 267
 268         ZEND_ASSERT(size);
 269
 270         return size;
 271 }
 272
 273 static inline size_t alignof_decl_type(decl_type *t);
 274 static inline size_t alignof_decl_arg(decl_arg *darg);
 275 static inline size_t alignof_decl_union(decl_union *u);
 276 static inline size_t alignof_decl_struct(decl_struct *s);
 277
 278 static inline size_t alignof_decl_args(decl_args *args) {
 279         size_t i, maxalign = 0;
 280
 281         for (i = 0; i < args->count; ++i) {
 282                 decl_arg *darg = args->args[i];
 283                 size_t align = alignof_decl_arg(darg);
 284
 285                 if (align > maxalign) {
 286                         maxalign = align;
 287                 }
 288         }
 289
 290         return maxalign;
 291 }
 292
 293 static inline size_t alignof_decl_struct(decl_struct *s) {
 294         if (!s->align) {
 295                 s->align = alignof_decl_args(s->args);
 296         }
 297         return s->align;
 298 }
 299
 300 static inline size_t alignof_decl_union(decl_union *u) {
 301         if (!u->align) {
 302                 u->align = alignof_decl_args(u->args);
 303         }
 304         return u->align;
 305 }
 306
 307 static inline size_t alignof_decl_type(decl_type *t) {
 308         decl_type *real = real_decl_type(t);
 309         size_t align;
 310
 311         switch (real->type) {
 312         case PSI_T_STRUCT:
 313                 align = alignof_decl_struct(real->strct);
 314                 break;
 315         case PSI_T_UNION:
 316                 align = alignof_decl_union(real->unn);
 317                 break;
 318         case PSI_T_ENUM:
 319         default:
 320                 align = psi_t_alignment(real->type);
 321         }
 322
 323         return align;
 324 }
 325
 326 static inline size_t alignof_decl_arg(decl_arg *darg) {
 327         size_t align;
 328
 329         if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level > 2)) {
 330                 align = psi_t_alignment(PSI_T_POINTER);
 331         } else {
 332                 align = alignof_decl_type(darg->type);
 333         }
 334
 335         return align;
 336 }
 337
 338 static inline size_t align_decl_arg(decl_arg *darg, size_t *pos, size_t *len) {
 339         size_t align = alignof_decl_arg(darg);
 340
 341         ZEND_ASSERT(align);
 342
 343         *len = sizeof_decl_arg(darg);
 344         *pos = psi_align(align, *pos);
 345
 346         return align;
 347 }
 348
 349 static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
 350         size_t i, pos, len, size, align;
 351
 352         if (!s->size && !s->args->count) {
 353                 data->error(data, s->token, PSI_WARNING,
 354                                 "Cannot compute size of empty struct %s",
 355                                 s->name);
 356                 return 0;
 357         }
 358
 359         for (i = 0; i < s->args->count; ++i) {
 360                 decl_arg *darg = s->args->args[i];
 361
 362                 if (!validate_decl_arg(data, darg)) {
 363                         return 0;
 364                 }
 365
 366                 ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
 367                 darg->var->arg = darg;
 368
 369                 if (!validate_decl_struct_darg(data, darg, s)) {
 370                         return 0;
 371                 } else if (darg->layout) {
 372                         pos = darg->layout->pos;
 373
 374                         align = align_decl_arg(darg, &pos, &len);
 375
 376                         if (darg->layout->len != len) {
 377                                 data->error(data, darg->token, PSI_WARNING,
 378                                                 "Computed size %zu of %s.%s does not match"
 379                                                 " pre-defined size %zu of type '%s'",
 380                                                 len, s->name, darg->var->name, darg->layout->len,
 381                                                 darg->type->name);
 382                         }
 383                         if (darg->layout->pos != pos) {
 384                                 data->error(data, darg->token, PSI_WARNING,
 385                                                 "Computed offset %zu of %s.%s does not match"
 386                                                 " pre-defined offset %zu",
 387                                                 pos, s->name, darg->var->name, darg->layout->pos);
 388                         }
 389                 } else  {
 390                         if (i) {
 391                                 pos = s->args->args[i-1]->layout->pos +
 392                                                 s->args->args[i-1]->layout->len;
 393                         } else {
 394                                 pos = 0;
 395                         }
 396
 397                         align = align_decl_arg(darg, &pos, &len);
 398                         darg->layout = init_decl_struct_layout(pos, len);
 399                 }
 400
 401                 if (align > s->align) {
 402                         s->align = align;
 403                 }
 404         }
 405
 406         psi_sort_struct_args((void **) s->args->args, s->args->count);
 407
 408         if (s->args->count) {
 409                 decl_arg *darg = s->args->args[s->args->count-1];
 410
 411                 size = darg->layout->pos + darg->layout->len;
 412                 if (s->size < size) {
 413                         s->size = psi_align(size, s->align);
 414                 }
 415         }
 416
 417         return 1;
 418 }
 419
 420 static inline int validate_decl_union(PSI_Data *data, decl_union *u) {
 421         size_t i, pos, len, size = 0, align;
 422
 423         if (!u->size && !u->args->count) {
 424                 data->error(data, u->token, PSI_WARNING,
 425                                 "Cannot compute size of empty union %s",
 426                                 u->name);
 427                 return 0;
 428         }
 429
 430         for (i = 0; i < u->args->count; ++i) {
 431                 decl_arg *darg = u->args->args[i];
 432
 433                 if (!validate_decl_arg(data, darg)) {
 434                         return 0;
 435                 }
 436
 437                 ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
 438                 darg->var->arg = darg;
 439
 440                 if (!validate_decl_struct_darg(data, darg, u)) {
 441                         return 0;
 442                 } else if (darg->layout) {
 443                         pos = darg->layout->pos;
 444
 445                         align = align_decl_arg(darg, &pos, &len);
 446
 447                         if (darg->layout->pos != 0) {
 448                                 data->error(data, darg->token, PSI_WARNING,
 449                                                 "Offset of %s.%s should be 0",
 450                                                 u->name, darg->var->name);
 451                                 darg->layout->pos = 0;
 452                         }
 453                         if (darg->layout->len != len) {
 454                                 data->error(data, darg->token, PSI_WARNING,
 455                                                 "Computed size %zu of %s.%s does not match"
 456                                                 " pre-defined size %zu of type '%s'",
 457                                                 len, u->name, darg->var->name, darg->layout->len,
 458                                                 darg->type->name);
 459                         }
 460                 } else {
 461                         pos = 0;
 462
 463                         align = align_decl_arg(darg, &pos, &len);
 464                         darg->layout = init_decl_struct_layout(pos, len);
 465
 466                 }
 467                 if (len > size) {
 468                         size = len;
 469                 }
 470                 if (align > u->align) {
 471                         u->align = align;
 472                 }
 473         }
 474
 475         psi_sort_struct_args((void **) u->args->args, u->args->count);
 476
 477         if (u->size < size) {
 478                 u->size = psi_align(size, u->align);
 479         }
 480
 481         return 1;
 482 }
 483
 484 static const char * const abi_ccs[] = {
 485                 "default", /* \                 */
 486                 "extern",  /*  > - all the same */
 487                 "cdecl",   /* /                 */
 488                 "mscdecl",
 489                 "stdcall",
 490                 "fastcall",
 491 };
 492 static inline int validate_decl_abi(PSI_Data *data, decl_abi *abi) {
 493         size_t i;
 494
 495         for (i = 0; i < sizeof(abi_ccs)/sizeof(char*); ++i) {
 496                 if (strcasecmp(abi->convention, abi_ccs[i])) {
 497                         return 1;
 498                 }
 499         }
 500         return 0;
 501 }
 502 static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_arg *func)
 503 {
 504         struct psi_func_redir *redir;
 505
 506         if (!strcmp(func->var->name, "dlsym")) {
 507                 data->error(data, func->token, PSI_WARNING, "Cannot dlsym dlsym (sic!)");
 508                 return 0;
 509         }
 510
 511         if (!validate_decl_arg(data, func)) {
 512                 return 0;
 513         }
 514         for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
 515                 if (!strcmp(func->var->name, redir->name)) {
 516                         decl->call.sym = redir->func;
 517                 }
 518         }
 519         if (!decl->call.sym) {
 520 #ifndef RTLD_NEXT
 521 # define RTLD_NEXT ((void *) -1l)
 522 #endif
 523                 decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
 524                 if (!decl->call.sym) {
 525                         data->error(data, func->token, PSI_WARNING,
 526                                 "Failed to locate symbol '%s': %s",
 527                                 func->var->name, dlerror() ?: "not found");
 528                 }
 529         }
 530         return 1;
 531 }
 532
 533 static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
 534         if (!validate_decl_abi(data, decl->abi)) {
 535                 data->error(data, decl->abi->token, PSI_WARNING,
 536                                 "Invalid calling convention: '%s'", decl->abi->token->text);
 537                 return 0;
 538         }
 539         if (!validate_decl_func(data, dl, decl, decl->func)) {
 540                 return 0;
 541         }
 542         if (decl->args) {
 543                 size_t i;
 544
 545                 for (i = 0; i < decl->args->count; ++i) {
 546                         if (!validate_decl_arg(data, decl->args->args[i])) {
 547                                 return 0;
 548                         }
 549                 }
 550         }
 551         return 1;
 552 }
 553 static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args, decl_arg *func) {
 554         size_t i;
 555
 556         if (args) for (i = 0; i < args->count; ++i) {
 557                 decl_arg *arg = args->args[i];
 558
 559                 if (!strcmp(var->name, arg->var->name)) {
 560                         ZEND_ASSERT(!var->arg || var->arg == arg);
 561                         return var->arg = arg;
 562                 }
 563         }
 564         if (func && !strcmp(var->name, func->var->name)) {
 565                 return var->arg = func;
 566         }
 567
 568         return NULL;
 569 }
 570 static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
 571         if (s->args) {
 572                 return locate_decl_var_arg(var, s->args, NULL);
 573         }
 574
 575         return NULL;
 576 }
 577 static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
 578         size_t i;
 579
 580         for (i = 0; i < consts->count; ++i) {
 581                 constant *cnst = consts->list[i];
 582
 583                 if (!strcmp(cnst->name, exp->u.numb)) {
 584                         free(exp->u.numb);
 585                         return exp->u.cnst = cnst;
 586                 }
 587         }
 588
 589         return NULL;
 590 }
 591 static inline decl_enum_item *locate_num_exp_enum_item_ex(num_exp *exp, decl_enum *e) {
 592         size_t k;
 593
 594         if (e) for (k = 0; k < e->items->count; ++k) {
 595                 decl_enum_item *i = e->items->list[k];
 596
 597                 if (!strcmp(i->name, exp->u.dvar->name)) {
 598                         free_decl_var(exp->u.dvar);
 599                         exp->t = PSI_T_ENUM;
 600                         exp->u.enm = i;
 601                         return i;
 602                 }
 603         }
 604         return NULL;
 605 }
 606 static inline decl_enum_item *locate_num_exp_enum_item(num_exp *exp, decl_enums *enums) {
 607         size_t j;
 608
 609         if (enums) for (j = 0; j < enums->count; ++j) {
 610                 decl_enum *e = enums->list[j];
 611                 decl_enum_item *i = locate_num_exp_enum_item_ex(exp, e);
 612
 613                 if (i) {
 614                         return i;
 615                 }
 616         }
 617         return NULL;
 618 }
 619 static inline int validate_num_exp(PSI_Data *data, num_exp *exp, decl_args *dargs, decl_arg *func, decl_enum *enm) {
 620         if (exp->operand) {
 621                 switch (exp->operator) {
 622                 case PSI_T_PLUS:
 623                         exp->calculator = psi_calc_add;
 624                         break;
 625                 case PSI_T_MINUS:
 626                         exp->calculator = psi_calc_sub;
 627                         break;
 628                 case PSI_T_ASTERISK:
 629                         exp->calculator = psi_calc_mul;
 630                         break;
 631                 case PSI_T_SLASH:
 632                         exp->calculator = psi_calc_div;
 633                         break;
 634                 EMPTY_SWITCH_DEFAULT_CASE();
 635                 }
 636                 if (!validate_num_exp(data, exp->operand, dargs, func, enm)) {
 637                         return 0;
 638                 }
 639         }
 640         switch (exp->t) {
 641         case PSI_T_NAME:
 642                 if (!locate_decl_var_arg(exp->u.dvar, dargs, func)) {
 643                         if (!locate_num_exp_enum_item(exp, data->enums) && !locate_num_exp_enum_item_ex(exp, enm)) {
 644                                 data->error(data, exp->token, PSI_WARNING, "Unknown variable '%s' in numeric expression",
 645                                                 exp->u.dvar->name);
 646                                 return 0;
 647                         }
 648                 }
 649                 return 1;
 650         case PSI_T_NSNAME:
 651                 if (!locate_num_exp_constant(exp, data->consts)) {
 652                         data->error(data, exp->token, PSI_WARNING, "Unknown constant '%s' in numeric expression",
 653                                         exp->u.numb);
 654                         return 0;
 655                 }
 656                 return 1;
 657         case PSI_T_NUMBER:
 658         case PSI_T_ENUM:
 659                 return 1;
 660         default:
 661                 return 0;
 662         }
 663 }
 664
 665 static inline int validate_decl_enum(PSI_Data *data, decl_enum *e) {
 666         size_t j;
 667
 668         if (!e->items || !e->items->count) {
 669                 data->error(data, e->token, PSI_WARNING, "Empty enum '%s'", e->name);
 670                 return 0;
 671         }
 672
 673         for (j = 0; j < e->items->count; ++j) {
 674                 decl_enum_item *i = e->items->list[j];
 675
 676                 if (!i->num) {
 677                         if (j) {
 678                                 i->inc.t = PSI_T_NUMBER;
 679                                 i->inc.u.numb = "1";
 680                                 i->inc.operator = PSI_T_PLUS;
 681                                 i->inc.operand = i->prev->num ?: &i->prev->inc;
 682                                 i->num = &i->inc;
 683                         } else {
 684                                 i->inc.t = PSI_T_NUMBER;
 685                                 i->inc.u.numb = "0";
 686                                 i->num = &i->inc;
 687                         }
 688                 }
 689                 if (!validate_num_exp(data, i->num, NULL, NULL, e)) {
 690                         return 0;
 691                 }
 692         }
 693
 694         return 1;
 695 }
 696
 697 static inline int validate_set_value_handler(set_value *set) {
 698         switch (set->func->type) {
 699         case PSI_T_TO_BOOL:
 700                 set->func->handler = psi_to_bool;
 701                 break;
 702         case PSI_T_TO_INT:
 703                 set->func->handler = psi_to_int;
 704                 break;
 705         case PSI_T_TO_FLOAT:
 706                 set->func->handler = psi_to_double;
 707                 break;
 708         case PSI_T_TO_STRING:
 709                 set->func->handler = psi_to_string;
 710                 break;
 711         case PSI_T_TO_ARRAY:
 712                 set->func->handler = psi_to_array;
 713                 break;
 714         case PSI_T_TO_OBJECT:
 715                 set->func->handler = psi_to_object;
 716                 break;
 717         case PSI_T_VOID:
 718                 set->func->handler = psi_to_void;
 719                 break;
 720         case PSI_T_ELLIPSIS:
 721                 if (set->outer.set && set->outer.set->func->type == PSI_T_TO_ARRAY) {
 722                         set->func->handler = psi_to_recursive;
 723                         set->inner = set->outer.set->inner;
 724                         break;
 725                 }
 726                 /* no break */
 727         default:
 728                 return 0;
 729         }
 730         return 1;
 731 }
 732 static inline void decl_var_arg_v(decl_args *args, va_list argp) {
 733         int argc;
 734         decl_arg **argv;
 735
 736         memset(args, 0, sizeof(*args));
 737
 738         while ((argc = va_arg(argp, int))) {
 739                 argv = va_arg(argp, decl_arg **);
 740                 while (argc--) {
 741                         add_decl_arg(args, *argv++);
 742                 }
 743         }
 744 }
 745 static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
 746         size_t i;
 747         decl_type *ref_type;
 748         decl_var *set_var = set->vars->vars[0];
 749
 750         if (!validate_set_value_handler(set)) {
 751                 data->error(data, set->func->token, PSI_WARNING, "Invalid cast '%s' in `set` statement", set->func->name);
 752                 return 0;
 753         }
 754
 755         for (i = 0; i < set->vars->count; ++i) {
 756                 decl_var *svar = set->vars->vars[i];
 757                 if (!svar->arg && !locate_decl_var_arg(svar, ref_list, NULL)) {
 758                         data->error(data, svar->token, PSI_WARNING, "Unknown variable '%s' in `set` statement", svar->name);
 759                         return 0;
 760                 }
 761         }
 762
 763         if (!ref) {
 764                 ref = set_var->arg;
 765         }
 766         ref_type = real_decl_type(ref->type);
 767
 768         if (set->inner && set->inner->count) {
 769                 int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
 770                 int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
 771
 772                 if (!is_to_array && !is_pointer_to_struct) {
 773                         data->error(data, set->func->token, E_WARNING, "Inner `set` statement casts only work with "
 774                                         "to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
 775                         return 0;
 776                 }
 777         }
 778         if (set->num) {
 779                 if (!validate_num_exp(data, set->num, ref_list, ref, NULL)) {
 780                         return 0;
 781                 }
 782         }
 783
 784         if (ref_type->type == PSI_T_STRUCT) {
 785                 /* to_array(struct, to_...) */
 786                 if (!set->outer.set || set->outer.set->inner->vals != set->inner->vals) {
 787                         for (i = 0; i < set->inner->count; ++i) {
 788                                 decl_var *sub_var = set->inner->vals[i]->vars->vars[0];
 789                                 decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
 790
 791                                 if (sub_ref) {
 792                                         if (!validate_set_value_ex(data, set->inner->vals[i], sub_ref, ref_type->strct->args)) {
 793                                                 return 0;
 794                                         }
 795                                 }
 796                         }
 797                 }
 798         } else if (set->inner && set->inner->count == 1) {
 799                 /* to_array(ptr, to_string(*ptr)) */
 800                 decl_var *sub_var = set->inner->vals[0]->vars->vars[0];
 801                 decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list, ref);
 802
 803                 if (sub_ref) {
 804                         if (strcmp(sub_var->name, set_var->name)) {
 805                                 data->error(data, sub_var->token, E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
 806                                 return 0;
 807                         }
 808                         if (!validate_set_value_ex(data, set->inner->vals[0], sub_ref, ref_list)) {
 809                                 return 0;
 810                         }
 811                 }
 812         } else if (set->inner && set->inner->count > 1) {
 813                 data->error(data, set->func->token, E_WARNING, "Inner `set` statement casts on pointers may only occur once");
 814                 return 0;
 815         }
 816
 817         return 1;
 818 }
 819 static inline int validate_set_value(PSI_Data *data, set_value *set, ...) {
 820         va_list argp;
 821         decl_args args = {0};
 822         int check;
 823
 824         va_start(argp, set);
 825         decl_var_arg_v(&args, argp);
 826         va_end(argp);
 827
 828         check = validate_set_value_ex(data, set, NULL, &args);
 829         if (args.args) {
 830                 free(args.args);
 831         }
 832         return check;
 833 }
 834 static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
 835         if (decls) {
 836                 size_t i;
 837
 838                 for (i = 0; i < decls->count; ++i) {
 839                         if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
 840                                 ret->decl = decls->list[i]->func;
 841                                 return decls->list[i];
 842                         }
 843                 }
 844         }
 845
 846         return NULL;
 847 }
 848 static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
 849         return_stmt *ret;
 850
 851         /* we must have exactly one ret stmt delcaring the native func to call */
 852         /* and which type cast to apply */
 853         if (impl->stmts->ret.count != 1) {
 854                 if (impl->stmts->ret.count > 1) {
 855                         data->error(data, impl->stmts->ret.list[1]->token, PSI_WARNING,
 856                                         "Too many `return` statements for implmentation %s;"
 857                                         " found %zu, exactly one is needed",
 858                                         impl->func->name, impl->stmts->ret.count);
 859                 } else {
 860                         data->error(data, impl->func->token, PSI_WARNING,
 861                                         "Missing `return` statement for implementation %s",
 862                                         impl->func->name);
 863                 }
 864                 return 0;
 865         }
 866
 867         ret = impl->stmts->ret.list[0];
 868
 869         if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
 870                 data->error(data, ret->token, PSI_WARNING,
 871                                 "Missing declaration '%s' for `return` statment for implementation %s",
 872                                 ret->set->vars->vars[0]->name, impl->func->name);
 873                 return 0;
 874         }
 875
 876         if (!validate_set_value(data, ret->set, 1, &ret->decl, impl->decl->args ? (int) impl->decl->args->count : 0, impl->decl->args ? impl->decl->args->args : NULL, 0)) {
 877                 return 0;
 878         }
 879
 880         impl->decl->impl = impl;
 881
 882         return 1;
 883 }
 884
 885 static inline int validate_let_func(PSI_Data *data, let_func *func, impl *impl) {
 886         int check = 0;
 887         size_t j;
 888
 889         if (impl->func->args) {
 890                 for (j = 0; j < impl->func->args->count; ++j) {
 891                         impl_arg *iarg = impl->func->args->args[j];
 892
 893                         if (!strcmp(func->var->name, iarg->var->name)) {
 894                                 func->arg = iarg;
 895                                 check = 1;
 896                                 break;
 897                         }
 898                 }
 899         }
 900         if (!check) {
 901                 data->error(data, func->var->token, PSI_WARNING, "Unknown value '$%s' of `let` statement"
 902                                 " for cast '%s' of implementation '%s'",
 903                                 func->var->name, func->name, impl->func->name);
 904                 return 0;
 905         }
 906         return 1;
 907 }
 908
 909 static inline int validate_let_callback(PSI_Data *data, decl_var *let_var, let_callback *cb, impl *impl) {
 910         decl_type *cb_type;
 911         decl *cb_func;
 912         size_t i;
 913
 914         if (!validate_let_func(data, cb->func, impl)) {
 915                 return 0;
 916         }
 917
 918         cb_type = real_decl_type(let_var->arg->type);
 919         if (cb_type->type != PSI_T_FUNCTION) {
 920                 data->error(data, let_var->token, PSI_WARNING, "Not a function: %s", let_var->name);
 921                 return 0;
 922         }
 923         cb_func = cb_type->func;
 924         for (i = 0; i < cb->args->count; ++i) {
 925                 if (!validate_set_value(data, cb->args->vals[i], cb_func->args->count, cb_func->args->args, 0)) {
 926                         return 0;
 927                 }
 928         }
 929 }
 930
 931 static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
 932         size_t i, j;
 933         /* we can have multiple let stmts */
 934
 935         /* check that we have a decl arg for every let stmt */
 936         for (i = 0; i < impl->stmts->let.count; ++i) {
 937                 let_stmt *let = impl->stmts->let.list[i];
 938                 decl_var *let_var;
 939                 int check = 0;
 940
 941                 if (let->val && let->val->kind == PSI_LET_TMP) {
 942                         let_var = let->val->data.var;
 943                 } else {
 944                         let_var = let->var;
 945                 }
 946
 947                 if (!locate_decl_var_arg(let_var, impl->decl->args, impl->decl->func)) {
 948                         data->error(data, let_var->token, PSI_WARNING, "Unknown variable '%s' in `let` statement"
 949                                         " of implementation '%s'", let_var->name, impl->func->name);
 950                         return 0;
 951                 }
 952
 953                 switch (let->val->kind) {
 954                 case PSI_LET_NULL:
 955                         break;
 956                 case PSI_LET_TMP:
 957                         /* e.g. let bar = &strval($bar); // decl_arg(char **bar) */
 958                         /* e.g. let foo = *bar;  */
 959                         let->var->pointer_level = let->val->data.var->pointer_level;
 960                         let->var->arg = init_decl_arg(
 961                                         init_decl_type(
 962                                                         real_decl_type(let->val->data.var->arg->type)->type,
 963                                                         real_decl_type(let->val->data.var->arg->type)->name),
 964                                         init_decl_var(
 965                                                         let->var->name,
 966                                                         let->var->pointer_level,
 967                                                         let->var->array_size));
 968                         break;
 969                 case PSI_LET_NUMEXP:
 970                         if (!validate_num_exp(data, let->val->data.num, impl->decl->args, impl->decl->func, NULL)) {
 971                                 return 0;
 972                         }
 973                         break;
 974                 case PSI_LET_CALLOC:
 975                         if (!validate_num_exp(data, let->val->data.alloc->nmemb, impl->decl->args, impl->decl->func, NULL)) {
 976                                 return 0;
 977                         }
 978                         if (!validate_num_exp(data, let->val->data.alloc->size, impl->decl->args, impl->decl->func, NULL)) {
 979                                 return 0;
 980                         }
 981                         break;
 982                 case PSI_LET_CALLBACK:
 983                         if (!validate_let_callback(data, let->var, let->val->data.callback, impl)) {
 984                                 return 0;
 985                         }
 986                         break;
 987                 case PSI_LET_FUNC:
 988                         if (!validate_let_func(data, let->val->data.func, impl)) {
 989                                 return 0;
 990                         }
 991                         break;
 992                 }
 993         }
 994
 995         /* check that we have a let stmt for every decl arg */
 996         if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
 997                 decl_arg *darg = impl->decl->args->args[i];
 998                 int check = 0;
 999
1000                 for (j = 0; j < impl->stmts->let.count; ++j) {
1001                         let_stmt *let = impl->stmts->let.list[j];
1002
1003                         if (!strcmp(let->var->name, darg->var->name)) {
1004                                 darg->let = let;
1005                                 check = 1;
1006                                 break;
1007                         }
1008                 }
1009                 if (!check) {
1010                         data->error(data, impl->func->token, PSI_WARNING,
1011                                         "Missing `let` statement for arg '%s %.*s%s'"
1012                                         " of declaration '%s' for implementation '%s'",
1013                                         darg->type->name, (int) darg->var->pointer_level, "*****",
1014                                         darg->var->name, impl->decl->func->var->name, impl->func->name);
1015                         return 0;
1016                 }
1017         }
1018
1019         return 1;
1020 }
1021 static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
1022         size_t i, j, k;
1023         /* we can have any count of set stmts; processing out vars */
1024         /* check that set stmts reference known variables */
1025         for (i = 0; i < impl->stmts->set.count; ++i) {
1026                 set_stmt *set = impl->stmts->set.list[i];
1027                 int check = 0;
1028
1029                 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
1030                         impl_arg *iarg = impl->func->args->args[j];
1031
1032                         if (!strcmp(set->var->name, iarg->var->name)) {
1033                                 set->arg = iarg;
1034                                 check = 1;
1035                                 break;
1036                         }
1037                 }
1038                 if (!check) {
1039                         data->error(data, set->var->token, PSI_WARNING, "Unknown variable '$%s' of `set` statement"
1040                                         " of implementation '%s'",
1041                                         set->var->name, impl->func->name);
1042                         return 0;
1043                 }
1044
1045                 for (j = 0; j < set->val->vars->count; ++j) {
1046                         decl_var *set_var = set->val->vars->vars[j];
1047
1048                         check = 0;
1049                         if (impl->decl->args) {
1050                                 for (k = 0; k < impl->decl->args->count; ++k) {
1051                                         decl_arg *set_arg = impl->decl->args->args[k];
1052
1053                                         if (!strcmp(set_var->name, set_arg->var->name)) {
1054                                                 check = 1;
1055                                                 set_var->arg = set_arg;
1056                                                 if (!validate_set_value(data, set->val, 1, &set_arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
1057                                                         return 0;
1058                                                 }
1059                                                 break;
1060                                         }
1061                                 }
1062                         }
1063                         if (!check) {
1064                                 for (k = 0; k < impl->stmts->let.count; ++k) {
1065                                         let_stmt *let = impl->stmts->let.list[k];
1066
1067                                         /* check temp vars */
1068                                         if (let->val && let->val->kind == PSI_LET_TMP) {
1069                                                 if (!strcmp(set_var->name, let->var->name)) {
1070                                                         check = 1;
1071                                                         set_var->arg = let->var->arg;
1072                                                         if (!validate_set_value(data, set->val, 1, &set_var->arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
1073                                                                 return 0;
1074                                                         }
1075                                                         break;
1076                                                 }
1077                                         }
1078                                 }
1079                         }
1080
1081                         if (!check) {
1082                                 data->error(data, set_var->token, PSI_WARNING, "Unknown value '%s' of `set` statement"
1083                                                 " for variable '$%s' of implementation '%s'",
1084                                                 set_var->name, set->arg->var->name, impl->func->name);
1085                                 return 0;
1086                         }
1087                 }
1088         }
1089         return 1;
1090 }
1091 static inline decl *locate_free_decl(decls *decls, free_call *f) {
1092         if (decls)  {
1093                 size_t i;
1094
1095                 for (i = 0; i < decls->count; ++i) {
1096                         if (!strcmp(decls->list[i]->func->var->name, f->func)) {
1097                                 f->decl = decls->list[i];
1098                                 return decls->list[i];
1099                         }
1100                 }
1101         }
1102
1103         return NULL;
1104 }
1105 static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
1106         size_t i, j, k, l;
1107         /* we can have any count of free stmts; freeing any out vars */
1108         for (i = 0; i < impl->stmts->fre.count; ++i) {
1109                 free_stmt *fre = impl->stmts->fre.list[i];
1110
1111                 for (j = 0; j < fre->calls->count; ++j) {
1112                         free_call *free_call = fre->calls->list[j];
1113
1114                         /* first find the decl of the free func */
1115                         if (!locate_free_decl(data->decls, free_call)) {
1116                                 data->error(data, free_call->token, PSI_WARNING,
1117                                                 "Missing declaration '%s' in `free` statement"
1118                                                 " of implementation '%s'",
1119                                                 free_call->func, impl->func->name);
1120                                 return 0;
1121                         }
1122
1123
1124
1125                         /* now check for known vars */
1126                         for (l = 0; l < free_call->vars->count; ++l) {
1127                                 int check = 0;
1128                                 decl_var *free_var = free_call->vars->vars[l];
1129
1130                                 if (!strcmp(free_var->name, impl->decl->func->var->name)) {
1131                                         check = 1;
1132                                         free_var->arg = impl->decl->func;
1133                                 } else if (impl->decl->args) {
1134                                         for (k = 0; k < impl->decl->args->count; ++k) {
1135                                                 decl_arg *free_arg = impl->decl->args->args[k];
1136
1137                                                 if (!strcmp(free_var->name, free_arg->var->name)) {
1138                                                         check = 1;
1139                                                         free_var->arg = free_arg;
1140                                                         break;
1141                                                 }
1142                                         }
1143                                 }
1144
1145                                 if (!check) {
1146                                         data->error(data, free_var->token, PSI_WARNING,
1147                                                         "Unknown variable '%s' of `free` statement"
1148                                                         " of implementation '%s'",
1149                                                         free_var->name, impl->func->name);
1150                                         return 0;
1151                                 }
1152                         }
1153                 }
1154         }
1155         return 1;
1156 }
1157 static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
1158         if (!impl->stmts) {
1159                 data->error(data, impl->func->token, PSI_WARNING,
1160                                 "Missing body for implementation %s!",
1161                                 impl->func->name);
1162                 return 0;
1163         }
1164
1165         if (!validate_impl_ret_stmt(data, impl)) {
1166                 return 0;
1167         }
1168
1169         if (!validate_impl_let_stmts(data, impl)) {
1170                 return 0;
1171         }
1172         if (!validate_impl_set_stmts(data, impl)) {
1173                 return 0;
1174         }
1175         if (!validate_impl_free_stmts(data, impl)) {
1176                 return 0;
1177         }
1178
1179         return 1;
1180 }
1181
1182 static inline int validate_impl_args(PSI_Data *data, impl *impl) {
1183         int def = 0;
1184         size_t i;
1185
1186         for (i = 0; i < impl->func->args->count; ++i) {
1187                 impl_arg *iarg = impl->func->args->args[i];
1188
1189                 if (iarg->def) {
1190                         def = 1;
1191                 } else if (def) {
1192                         data->error(data, impl->func->token, PSI_WARNING,
1193                                         "Non-optional argument %zu '$%s' of implementation '%s'"
1194                                         " follows optional argument",
1195                                         i+1, iarg->var->name, impl->func->name);
1196                         return 0;
1197                 }
1198         }
1199
1200         return 1;
1201 }
1202
1203 static inline int validate_impl(PSI_Data *data, impl *impl) {
1204         if (!validate_impl_args(data, impl)) {
1205                 return 0;
1206         }
1207         return validate_impl_stmts(data, impl);
1208 }
1209
1210
1211 int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
1212 {
1213         PSI_Data *D;
1214         void *dlopened = NULL;
1215         size_t i, count = C->count++, check_round, check_count;
1216         decl_typedefs *check_defs = P->defs;
1217         decl_structs *check_structs = P->structs;
1218         decl_unions *check_unions = P->unions;
1219         decl_enums *check_enums = P->enums;
1220         unsigned silent = C->flags & PSI_PARSER_SILENT;
1221
1222         C->data = realloc(C->data, C->count * sizeof(*C->data));
1223         D = PSI_DataExchange(&C->data[count], PSI_DATA(P));
1224
1225 #define REVALIDATE(what) do { \
1226                 if (check_round && check_ ##what) { \
1227                         free(check_ ##what->list); \
1228                         free(check_ ##what); \
1229                 } \
1230                 check_ ##what = recheck_ ##what; \
1231 } while (0)
1232 #define CHECK_TOTAL (CHECK_COUNT(defs) + CHECK_COUNT(structs) + CHECK_COUNT(enums))
1233 #define CHECK_COUNT(of) (check_ ##of ? check_ ##of->count : 0)
1234
1235         if (!silent) {
1236                 /* no warnings on first round */
1237                 C->flags |= PSI_PARSER_SILENT;
1238         }
1239         for (check_round = 0, check_count = 0; CHECK_TOTAL && check_count != CHECK_TOTAL; ++check_round) {
1240                 decl_typedefs *recheck_defs = NULL;
1241                 decl_structs *recheck_structs = NULL;
1242                 decl_unions *recheck_unions = NULL;
1243                 decl_enums *recheck_enums = NULL;
1244
1245                 check_count = CHECK_TOTAL;
1246
1247                 for (i = 0; i < CHECK_COUNT(defs); ++i) {
1248                         if (validate_decl_typedef(PSI_DATA(C), check_defs->list[i])) {
1249                                 C->defs = add_decl_typedef(C->defs, check_defs->list[i]);
1250                         } else {
1251                                 recheck_defs = add_decl_typedef(recheck_defs, check_defs->list[i]);
1252                         }
1253                 }
1254                 for (i = 0; i < CHECK_COUNT(structs); ++i) {
1255                         if (validate_decl_struct(PSI_DATA(C), check_structs->list[i])) {
1256                                 C->structs = add_decl_struct(C->structs, check_structs->list[i]);
1257                         } else {
1258                                 recheck_structs = add_decl_struct(recheck_structs, check_structs->list[i]);
1259                         }
1260                 }
1261                 for (i = 0; i < CHECK_COUNT(unions); ++i) {
1262                         if (validate_decl_union(PSI_DATA(C), check_unions->list[i])) {
1263                                 C->unions = add_decl_union(C->unions, check_unions->list[i]);
1264                         } else {
1265                                 recheck_unions = add_decl_union(recheck_unions, check_unions->list[i]);
1266                         }
1267                 }
1268                 for (i = 0; i < CHECK_COUNT(enums); ++i) {
1269                         if (validate_decl_enum(PSI_DATA(C), check_enums->list[i])) {
1270                                 C->enums = add_decl_enum(C->enums, check_enums->list[i]);
1271                         } else {
1272                                 recheck_enums = add_decl_enum(recheck_enums, check_enums->list[i]);
1273                         }
1274                 }
1275
1276                 REVALIDATE(defs);
1277                 REVALIDATE(structs);
1278                 REVALIDATE(unions);
1279                 REVALIDATE(enums);
1280
1281                 if (check_round == 0 && !silent) {
1282                         C->flags &= ~PSI_PARSER_SILENT;
1283                 }
1284         }
1285
1286
1287         if (D->consts) {
1288                 for (i = 0; i < D->consts->count; ++i) {
1289                         if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
1290                                 C->consts = add_constant(C->consts, D->consts->list[i]);
1291                         }
1292                 }
1293         }
1294
1295         if (!validate_lib(D, &dlopened)) {
1296                 return 0;
1297         }
1298
1299         add_decl_lib(&C->psi.libs, dlopened);
1300
1301         if (D->decls) {
1302                 for (i = 0; i < D->decls->count; ++i) {
1303                         if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
1304                                 C->decls = add_decl(C->decls, D->decls->list[i]);
1305                         }
1306                 }
1307         }
1308         if (D->impls) {
1309                 for (i = 0; i < D->impls->count; ++i) {
1310                         if (validate_impl(PSI_DATA(C), D->impls->list[i])) {
1311                                 C->impls = add_impl(C->impls, D->impls->list[i]);
1312                         }
1313                 }
1314         }
1315
1316         return 1;
1317 }
1318
1319 int PSI_ContextValidateData(PSI_Data *dest, PSI_Data *source)
1320 {
1321         size_t i;
1322         int errors = 0;
1323
1324         if (source->defs) for (i = 0; i < source->defs->count; ++i) {
1325                 decl_arg *def = source->defs->list[i];
1326
1327                 if (validate_decl_typedef(source, def)) {
1328                         if (dest) {
1329                                 dest->defs = add_decl_typedef(dest->defs, def);
1330                         }
1331                 } else {
1332                         ++errors;
1333                 }
1334         }
1335
1336         if (source->consts) for (i = 0; i < source->consts->count; ++i) {
1337                 constant *constant = source->consts->list[i];
1338
1339                 if (validate_constant(source, constant)) {
1340                         if (dest) {
1341                                 dest->consts = add_constant(dest->consts, constant);
1342                         }
1343                 } else {
1344                         ++errors;
1345                 }
1346         }
1347
1348         if (source->structs) for (i = 0; i < source->structs->count; ++i) {
1349                 decl_struct *dstruct = source->structs->list[i];
1350
1351                 if (validate_decl_struct(source, dstruct)) {
1352                         if (dest) {
1353                                 dest->structs = add_decl_struct(dest->structs, dstruct);
1354                         }
1355                 } else {
1356                         ++errors;
1357                 }
1358         }
1359
1360         if (source->unions) for (i = 0; i < source->unions->count; ++i) {
1361                 decl_union *dunion = source->unions->list[i];
1362
1363                 if (validate_decl_union(source, dunion)) {
1364                         if (dest) {
1365                                 dest->unions = add_decl_union(dest->unions, dunion);
1366                         }
1367                 } else {
1368                         ++errors;
1369                 }
1370         }
1371
1372         if (source->enums) for (i = 0; i < source->enums->count; ++i) {
1373                 decl_enum *denum = source->enums->list[i];
1374
1375                 if (validate_decl_enum(source, denum)) {
1376                         if (dest) {
1377                                 dest->enums = add_decl_enum(dest->enums, denum);
1378                         }
1379                 } else {
1380                         ++errors;
1381                 }
1382         }
1383
1384         if (source->decls) for (i = 0; i < source->decls->count; ++i) {
1385                 decl *decl = source->decls->list[i];
1386
1387                 if (validate_decl(source, NULL, decl)) {
1388                         if (dest) {
1389                                 dest->decls = add_decl(dest->decls, decl);
1390                         }
1391                 } else {
1392                         ++errors;
1393                 }
1394         }
1395
1396         if (source->impls) for (i = 0; i < source->impls->count; ++i) {
1397                 impl *impl = source->impls->list[i];
1398
1399                 if (validate_impl(source, impl)) {
1400                         if (dest) {
1401                                 dest->impls = add_impl(dest->impls, impl);
1402                         }
1403                 } else {
1404                         ++errors;
1405                 }
1406         }
1407
1408         return errors;
1409 }