granicus.if.org Git - postgresql/blob - src/interfaces/ecpg/ecpglib/descriptor.c

   1 /* dynamic SQL support routines
   2  *
   3  * $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/descriptor.c,v 1.24 2007/10/02 09:49:59 meskes Exp $
   4  */
   5
   6 #define POSTGRES_ECPG_INTERNAL
   7 #include "postgres_fe.h"
   8 #include "pg_type.h"
   9
  10 #include "ecpg-pthread-win32.h"
  11 #include "ecpgtype.h"
  12 #include "ecpglib.h"
  13 #include "ecpgerrno.h"
  14 #include "extern.h"
  15 #include "sqlca.h"
  16 #include "sql3types.h"
  17
  18 static void descriptor_free(struct descriptor *desc);
  19 static void descriptor_deallocate_all(struct descriptor *list);
  20
  21 /* We manage descriptors separately for each thread. */
  22 #ifdef ENABLE_THREAD_SAFETY
  23 static pthread_key_t    descriptor_key;
  24 #ifndef WIN32
  25 static pthread_once_t   descriptor_once = PTHREAD_ONCE_INIT;
  26 #endif
  27
  28 static void
  29 descriptor_destructor(void *arg)
  30 {
  31         descriptor_deallocate_all(arg);
  32 }
  33
  34 NON_EXEC_STATIC void
  35 descriptor_key_init(void)
  36 {
  37         pthread_key_create(&descriptor_key, descriptor_destructor);
  38 }
  39
  40 static struct descriptor *
  41 get_descriptors(void)
  42 {
  43         pthread_once(&descriptor_once, descriptor_key_init);
  44         return (struct descriptor *) pthread_getspecific(descriptor_key);
  45 }
  46
  47 static void
  48 set_descriptors(struct descriptor *value)
  49 {
  50         pthread_setspecific(descriptor_key, value);
  51 }
  52
  53 #else
  54 static struct descriptor                *all_descriptors = NULL;
  55 #define get_descriptors()               (all_descriptors)
  56 #define set_descriptors(value)  do { all_descriptors = (value); } while(0)
  57 #endif
  58
  59 /* old internal convenience function that might go away later */
  60 static PGresult *
  61 ECPGresultByDescriptor(int line, const char *name)
  62 {
  63         struct descriptor *desc = ECPGfind_desc(line, name);
  64         if (desc == NULL)
  65                 return NULL;
  66         return desc->result;
  67 }
  68
  69 static unsigned int
  70 ECPGDynamicType_DDT(Oid type)
  71 {
  72         switch (type)
  73         {
  74                 case DATEOID:
  75                         return SQL3_DDT_DATE;
  76                 case TIMEOID:
  77                         return SQL3_DDT_TIME;
  78                 case TIMESTAMPOID:
  79                         return SQL3_DDT_TIMESTAMP;
  80                 case TIMESTAMPTZOID:
  81                         return SQL3_DDT_TIMESTAMP_WITH_TIME_ZONE;
  82                 case TIMETZOID:
  83                         return SQL3_DDT_TIME_WITH_TIME_ZONE;
  84                 default:
  85                         return SQL3_DDT_ILLEGAL;
  86         }
  87 }
  88
  89 bool
  90 ECPGget_desc_header(int lineno, const char *desc_name, int *count)
  91 {
  92         PGresult   *ECPGresult;
  93         struct sqlca_t *sqlca = ECPGget_sqlca();
  94
  95         ECPGinit_sqlca(sqlca);
  96         ECPGresult = ECPGresultByDescriptor(lineno, desc_name);
  97         if (!ECPGresult)
  98                 return false;
  99
 100         *count = PQnfields(ECPGresult);
 101         sqlca->sqlerrd[2] = 1;
 102         ECPGlog("ECPGget_desc_header: found %d attributes.\n", *count);
 103         return true;
 104 }
 105
 106 static bool
 107 get_int_item(int lineno, void *var, enum ECPGttype vartype, int value)
 108 {
 109         switch (vartype)
 110         {
 111                 case ECPGt_short:
 112                         *(short *) var = (short) value;
 113                         break;
 114                 case ECPGt_int:
 115                         *(int *) var = (int) value;
 116                         break;
 117                 case ECPGt_long:
 118                         *(long *) var = (long) value;
 119                         break;
 120                 case ECPGt_unsigned_short:
 121                         *(unsigned short *) var = (unsigned short) value;
 122                         break;
 123                 case ECPGt_unsigned_int:
 124                         *(unsigned int *) var = (unsigned int) value;
 125                         break;
 126                 case ECPGt_unsigned_long:
 127                         *(unsigned long *) var = (unsigned long) value;
 128                         break;
 129 #ifdef HAVE_LONG_LONG_INT_64
 130                 case ECPGt_long_long:
 131                         *(long long int *) var = (long long int) value;
 132                         break;
 133                 case ECPGt_unsigned_long_long:
 134                         *(unsigned long long int *) var = (unsigned long long int) value;
 135                         break;
 136 #endif   /* HAVE_LONG_LONG_INT_64 */
 137                 case ECPGt_float:
 138                         *(float *) var = (float) value;
 139                         break;
 140                 case ECPGt_double:
 141                         *(double *) var = (double) value;
 142                         break;
 143                 default:
 144                         ECPGraise(lineno, ECPG_VAR_NOT_NUMERIC, ECPG_SQLSTATE_RESTRICTED_DATA_TYPE_ATTRIBUTE_VIOLATION, NULL);
 145                         return (false);
 146         }
 147
 148         return (true);
 149 }
 150
 151 static bool
 152 set_int_item(int lineno, int *target, const void *var, enum ECPGttype vartype)
 153 {
 154         switch (vartype)
 155         {
 156                 case ECPGt_short:
 157                         *target = *(short *) var;
 158                         break;
 159                 case ECPGt_int:
 160                         *target = *(int *) var;
 161                         break;
 162                 case ECPGt_long:
 163                         *target = *(long *) var;
 164                         break;
 165                 case ECPGt_unsigned_short:
 166                         *target = *(unsigned short *) var;
 167                         break;
 168                 case ECPGt_unsigned_int:
 169                         *target = *(unsigned int *) var;
 170                         break;
 171                 case ECPGt_unsigned_long:
 172                         *target = *(unsigned long *) var;
 173                         break;
 174 #ifdef HAVE_LONG_LONG_INT_64
 175                 case ECPGt_long_long:
 176                         *target = *(long long int *) var;
 177                         break;
 178                 case ECPGt_unsigned_long_long:
 179                         *target = *(unsigned long long int *) var;
 180                         break;
 181 #endif   /* HAVE_LONG_LONG_INT_64 */
 182                 case ECPGt_float:
 183                         *target = *(float *) var;
 184                         break;
 185                 case ECPGt_double:
 186                         *target = *(double *) var;
 187                         break;
 188                 default:
 189                         ECPGraise(lineno, ECPG_VAR_NOT_NUMERIC, ECPG_SQLSTATE_RESTRICTED_DATA_TYPE_ATTRIBUTE_VIOLATION, NULL);
 190                         return (false);
 191         }
 192
 193         return true;
 194 }
 195
 196 static bool
 197 get_char_item(int lineno, void *var, enum ECPGttype vartype, char *value, int varcharsize)
 198 {
 199         switch (vartype)
 200         {
 201                 case ECPGt_char:
 202                 case ECPGt_unsigned_char:
 203                         strncpy((char *) var, value, varcharsize);
 204                         break;
 205                 case ECPGt_varchar:
 206                         {
 207                                 struct ECPGgeneric_varchar *variable =
 208                                 (struct ECPGgeneric_varchar *) var;
 209
 210                                 if (varcharsize == 0)
 211                                         strncpy(variable->arr, value, strlen(value));
 212                                 else
 213                                         strncpy(variable->arr, value, varcharsize);
 214
 215                                 variable->len = strlen(value);
 216                                 if (varcharsize > 0 && variable->len > varcharsize)
 217                                         variable->len = varcharsize;
 218                         }
 219                         break;
 220                 default:
 221                         ECPGraise(lineno, ECPG_VAR_NOT_CHAR, ECPG_SQLSTATE_RESTRICTED_DATA_TYPE_ATTRIBUTE_VIOLATION, NULL);
 222                         return (false);
 223         }
 224
 225         return (true);
 226 }
 227
 228 bool
 229 ECPGget_desc(int lineno, const char *desc_name, int index,...)
 230 {
 231         va_list         args;
 232         PGresult   *ECPGresult;
 233         enum ECPGdtype type;
 234         int                     ntuples,
 235                                 act_tuple;
 236         struct variable data_var;
 237         struct sqlca_t *sqlca = ECPGget_sqlca();
 238
 239         va_start(args, index);
 240         ECPGinit_sqlca(sqlca);
 241         ECPGresult = ECPGresultByDescriptor(lineno, desc_name);
 242         if (!ECPGresult)
 243                 return (false);
 244
 245         ntuples = PQntuples(ECPGresult);
 246         if (ntuples < 1)
 247         {
 248                 ECPGraise(lineno, ECPG_NOT_FOUND, ECPG_SQLSTATE_NO_DATA, NULL);
 249                 return (false);
 250         }
 251
 252         if (index < 1 || index > PQnfields(ECPGresult))
 253         {
 254                 ECPGraise(lineno, ECPG_INVALID_DESCRIPTOR_INDEX, ECPG_SQLSTATE_INVALID_DESCRIPTOR_INDEX, NULL);
 255                 return (false);
 256         }
 257
 258         ECPGlog("ECPGget_desc: reading items for tuple %d\n", index);
 259         --index;
 260
 261         type = va_arg(args, enum ECPGdtype);
 262
 263         memset(&data_var, 0, sizeof data_var);
 264         data_var.type = ECPGt_EORT;
 265         data_var.ind_type = ECPGt_NO_INDICATOR;
 266
 267         while (type != ECPGd_EODT)
 268         {
 269                 char            type_str[20];
 270                 long            varcharsize;
 271                 long            offset;
 272                 long            arrsize;
 273                 enum ECPGttype vartype;
 274                 void       *var;
 275
 276                 vartype = va_arg(args, enum ECPGttype);
 277                 var = va_arg(args, void *);
 278                 varcharsize = va_arg(args, long);
 279                 arrsize = va_arg(args, long);
 280                 offset = va_arg(args, long);
 281
 282                 switch (type)
 283                 {
 284                         case (ECPGd_indicator):
 285                                 data_var.ind_type = vartype;
 286                                 data_var.ind_pointer = var;
 287                                 data_var.ind_varcharsize = varcharsize;
 288                                 data_var.ind_arrsize = arrsize;
 289                                 data_var.ind_offset = offset;
 290                                 if (data_var.ind_arrsize == 0 || data_var.ind_varcharsize == 0)
 291                                         data_var.ind_value = *((void **) (data_var.ind_pointer));
 292                                 else
 293                                         data_var.ind_value = data_var.ind_pointer;
 294                                 break;
 295
 296                         case ECPGd_data:
 297                                 data_var.type = vartype;
 298                                 data_var.pointer = var;
 299                                 data_var.varcharsize = varcharsize;
 300                                 data_var.arrsize = arrsize;
 301                                 data_var.offset = offset;
 302                                 if (data_var.arrsize == 0 || data_var.varcharsize == 0)
 303                                         data_var.value = *((void **) (data_var.pointer));
 304                                 else
 305                                         data_var.value = data_var.pointer;
 306                                 break;
 307
 308                         case ECPGd_name:
 309                                 if (!get_char_item(lineno, var, vartype, PQfname(ECPGresult, index), varcharsize))
 310                                         return (false);
 311
 312                                 ECPGlog("ECPGget_desc: NAME = %s\n", PQfname(ECPGresult, index));
 313                                 break;
 314
 315                         case ECPGd_nullable:
 316                                 if (!get_int_item(lineno, var, vartype, 1))
 317                                         return (false);
 318
 319                                 break;
 320
 321                         case ECPGd_key_member:
 322                                 if (!get_int_item(lineno, var, vartype, 0))
 323                                         return (false);
 324
 325                                 break;
 326
 327                         case ECPGd_scale:
 328                                 if (!get_int_item(lineno, var, vartype, (PQfmod(ECPGresult, index) - VARHDRSZ) & 0xffff))
 329                                         return (false);
 330
 331                                 ECPGlog("ECPGget_desc: SCALE = %d\n", (PQfmod(ECPGresult, index) - VARHDRSZ) & 0xffff);
 332                                 break;
 333
 334                         case ECPGd_precision:
 335                                 if (!get_int_item(lineno, var, vartype, PQfmod(ECPGresult, index) >> 16))
 336                                         return (false);
 337
 338                                 ECPGlog("ECPGget_desc: PRECISION = %d\n", PQfmod(ECPGresult, index) >> 16);
 339                                 break;
 340
 341                         case ECPGd_octet:
 342                                 if (!get_int_item(lineno, var, vartype, PQfsize(ECPGresult, index)))
 343                                         return (false);
 344
 345                                 ECPGlog("ECPGget_desc: OCTET_LENGTH = %d\n", PQfsize(ECPGresult, index));
 346                                 break;
 347
 348                         case ECPGd_length:
 349                                 if (!get_int_item(lineno, var, vartype, PQfmod(ECPGresult, index) - VARHDRSZ))
 350                                         return (false);
 351
 352                                 ECPGlog("ECPGget_desc: LENGTH = %d\n", PQfmod(ECPGresult, index) - VARHDRSZ);
 353                                 break;
 354
 355                         case ECPGd_type:
 356                                 if (!get_int_item(lineno, var, vartype, ECPGDynamicType(PQftype(ECPGresult, index))))
 357                                         return (false);
 358
 359                                 ECPGlog("ECPGget_desc: TYPE = %d\n", ECPGDynamicType(PQftype(ECPGresult, index)));
 360                                 break;
 361
 362                         case ECPGd_di_code:
 363                                 if (!get_int_item(lineno, var, vartype, ECPGDynamicType_DDT(PQftype(ECPGresult, index))))
 364                                         return (false);
 365
 366                                 ECPGlog("ECPGget_desc: TYPE = %d\n", ECPGDynamicType_DDT(PQftype(ECPGresult, index)));
 367                                 break;
 368
 369                         case ECPGd_cardinality:
 370                                 if (!get_int_item(lineno, var, vartype, PQntuples(ECPGresult)))
 371                                         return (false);
 372
 373                                 ECPGlog("ECPGget_desc: CARDINALITY = %d\n", PQntuples(ECPGresult));
 374                                 break;
 375
 376                         case ECPGd_ret_length:
 377                         case ECPGd_ret_octet:
 378
 379                                 /*
 380                                  * this is like ECPGstore_result
 381                                  */
 382                                 if (arrsize > 0 && ntuples > arrsize)
 383                                 {
 384                                         ECPGlog("ECPGget_desc line %d: Incorrect number of matches: %d don't fit into array of %d\n",
 385                                                         lineno, ntuples, arrsize);
 386                                         ECPGraise(lineno, ECPG_TOO_MANY_MATCHES, ECPG_SQLSTATE_CARDINALITY_VIOLATION, NULL);
 387                                         return false;
 388                                 }
 389                                 /* allocate storage if needed */
 390                                 if (arrsize == 0 && *(void **) var == NULL)
 391                                 {
 392                                         void       *mem = (void *) ECPGalloc(offset * ntuples, lineno);
 393
 394                                         if (!mem)
 395                                                 return false;
 396                                         *(void **) var = mem;
 397                                         ECPGadd_mem(mem, lineno);
 398                                         var = mem;
 399                                 }
 400
 401                                 for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
 402                                 {
 403                                         if (!get_int_item(lineno, var, vartype, PQgetlength(ECPGresult, act_tuple, index)))
 404                                                 return (false);
 405                                         var = (char *) var + offset;
 406                                         ECPGlog("ECPGget_desc: RETURNED[%d] = %d\n", act_tuple, PQgetlength(ECPGresult, act_tuple, index));
 407                                 }
 408                                 break;
 409
 410                         default:
 411                                 snprintf(type_str, sizeof(type_str), "%d", type);
 412                                 ECPGraise(lineno, ECPG_UNKNOWN_DESCRIPTOR_ITEM, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, type_str);
 413                                 return (false);
 414                 }
 415
 416                 type = va_arg(args, enum ECPGdtype);
 417         }
 418
 419         if (data_var.type != ECPGt_EORT)
 420         {
 421                 struct statement stmt;
 422                 char       *oldlocale;
 423
 424                 /* Make sure we do NOT honor the locale for numeric input */
 425                 /* since the database gives the standard decimal point */
 426                 oldlocale = ECPGstrdup(setlocale(LC_NUMERIC, NULL), lineno);
 427                 setlocale(LC_NUMERIC, "C");
 428
 429                 memset(&stmt, 0, sizeof stmt);
 430                 stmt.lineno = lineno;
 431
 432                 /* desparate try to guess something sensible */
 433                 stmt.connection = ECPGget_connection(NULL);
 434                 ECPGstore_result(ECPGresult, index, &stmt, &data_var);
 435
 436                 setlocale(LC_NUMERIC, oldlocale);
 437                 ECPGfree(oldlocale);
 438         }
 439         else if (data_var.ind_type != ECPGt_NO_INDICATOR && data_var.ind_pointer != NULL)
 440
 441                 /*
 442                  * ind_type != NO_INDICATOR should always have ind_pointer != NULL but
 443                  * since this might be changed manually in the .c file let's play it
 444                  * safe
 445                  */
 446         {
 447                 /*
 448                  * this is like ECPGstore_result but since we don't have a data
 449                  * variable at hand, we can't call it
 450                  */
 451                 if (data_var.ind_arrsize > 0 && ntuples > data_var.ind_arrsize)
 452                 {
 453                         ECPGlog("ECPGget_desc line %d: Incorrect number of matches (indicator): %d don't fit into array of %d\n",
 454                                         lineno, ntuples, data_var.ind_arrsize);
 455                         ECPGraise(lineno, ECPG_TOO_MANY_MATCHES, ECPG_SQLSTATE_CARDINALITY_VIOLATION, NULL);
 456                         return false;
 457                 }
 458
 459                 /* allocate storage if needed */
 460                 if (data_var.ind_arrsize == 0 && data_var.ind_value == NULL)
 461                 {
 462                         void       *mem = (void *) ECPGalloc(data_var.ind_offset * ntuples, lineno);
 463
 464                         if (!mem)
 465                                 return false;
 466                         *(void **) data_var.ind_pointer = mem;
 467                         ECPGadd_mem(mem, lineno);
 468                         data_var.ind_value = mem;
 469                 }
 470
 471                 for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
 472                 {
 473                         if (!get_int_item(lineno, data_var.ind_value, data_var.ind_type, -PQgetisnull(ECPGresult, act_tuple, index)))
 474                                 return (false);
 475                         data_var.ind_value = (char *) data_var.ind_value + data_var.ind_offset;
 476                         ECPGlog("ECPGget_desc: INDICATOR[%d] = %d\n", act_tuple, -PQgetisnull(ECPGresult, act_tuple, index));
 477                 }
 478         }
 479         sqlca->sqlerrd[2] = ntuples;
 480         return (true);
 481 }
 482
 483 bool
 484 ECPGset_desc_header(int lineno, const char *desc_name, int count)
 485 {
 486         struct descriptor *desc = ECPGfind_desc(lineno, desc_name);
 487         if (desc == NULL)
 488                 return false;
 489         desc->count = count;
 490         return true;
 491 }
 492
 493 bool
 494 ECPGset_desc(int lineno, const char *desc_name, int index,...)
 495 {
 496         va_list         args;
 497         struct descriptor *desc;
 498         struct descriptor_item *desc_item;
 499         struct variable *var;
 500
 501         desc = ECPGfind_desc(lineno, desc_name);
 502         if (desc == NULL)
 503                 return false;
 504
 505         for (desc_item = desc->items; desc_item; desc_item = desc_item->next)
 506         {
 507                 if (desc_item->num == index)
 508                         break;
 509         }
 510
 511         if (desc_item == NULL)
 512         {
 513                 desc_item = (struct descriptor_item *) ECPGalloc(sizeof(*desc_item), lineno);
 514                 if (!desc_item)
 515                         return false;
 516                 desc_item->num = index;
 517                 if (desc->count < index)
 518                         desc->count = index;
 519                 desc_item->next = desc->items;
 520                 desc->items = desc_item;
 521         }
 522
 523         if (!(var = (struct variable *) ECPGalloc(sizeof(struct variable), lineno)))
 524                 return false;
 525
 526         va_start(args, index);
 527
 528         for (;;)
 529         {
 530                 enum ECPGdtype itemtype;
 531                 const char *tobeinserted = NULL;
 532
 533                 itemtype = va_arg(args, enum ECPGdtype);
 534
 535                 if (itemtype == ECPGd_EODT)
 536                         break;
 537
 538                 var->type = va_arg(args, enum ECPGttype);
 539                 var->pointer = va_arg(args, char *);
 540
 541                 var->varcharsize = va_arg(args, long);
 542                 var->arrsize = va_arg(args, long);
 543                 var->offset = va_arg(args, long);
 544
 545                 if (var->arrsize == 0 || var->varcharsize == 0)
 546                         var->value = *((char **) (var->pointer));
 547                 else
 548                         var->value = var->pointer;
 549
 550                 /*
 551                  * negative values are used to indicate an array without given bounds
 552                  */
 553                 /* reset to zero for us */
 554                 if (var->arrsize < 0)
 555                         var->arrsize = 0;
 556                 if (var->varcharsize < 0)
 557                         var->varcharsize = 0;
 558
 559                 var->next = NULL;
 560
 561                 switch (itemtype)
 562                 {
 563                         case ECPGd_data:
 564                                 {
 565                                         if (!ECPGstore_input(lineno, true, var, &tobeinserted, false))
 566                                         {
 567                                                 ECPGfree(var);
 568                                                 return false;
 569                                         }
 570
 571                                         ECPGfree(desc_item->data); /* free() takes care of a potential NULL value */
 572                                         desc_item->data = (char *) tobeinserted;
 573                                         tobeinserted = NULL;
 574                                         break;
 575                                 }
 576
 577                         case ECPGd_indicator:
 578                                 set_int_item(lineno, &desc_item->indicator, var->pointer, var->type);
 579                                 break;
 580
 581                         case ECPGd_length:
 582                                 set_int_item(lineno, &desc_item->length, var->pointer, var->type);
 583                                 break;
 584
 585                         case ECPGd_precision:
 586                                 set_int_item(lineno, &desc_item->precision, var->pointer, var->type);
 587                                 break;
 588
 589                         case ECPGd_scale:
 590                                 set_int_item(lineno, &desc_item->scale, var->pointer, var->type);
 591                                 break;
 592
 593                         case ECPGd_type:
 594                                 set_int_item(lineno, &desc_item->type, var->pointer, var->type);
 595                                 break;
 596
 597                         default:
 598                                 {
 599                                         char            type_str[20];
 600
 601                                         snprintf(type_str, sizeof(type_str), "%d", itemtype);
 602                                         ECPGraise(lineno, ECPG_UNKNOWN_DESCRIPTOR_ITEM, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, type_str);
 603                                         ECPGfree(var);
 604                                         return false;
 605                                 }
 606                 }
 607         }
 608         ECPGfree(var);
 609
 610         return true;
 611 }
 612
 613 /* Free the descriptor and items in it. */
 614 static void
 615 descriptor_free(struct descriptor *desc)
 616 {
 617         struct descriptor_item *desc_item;
 618
 619         for (desc_item = desc->items; desc_item;)
 620         {
 621                 struct descriptor_item *di;
 622
 623                 ECPGfree(desc_item->data);
 624                 di = desc_item;
 625                 desc_item = desc_item->next;
 626                 ECPGfree(di);
 627         }
 628
 629         ECPGfree(desc->name);
 630         PQclear(desc->result);
 631         ECPGfree(desc);
 632 }
 633
 634 bool
 635 ECPGdeallocate_desc(int line, const char *name)
 636 {
 637         struct descriptor *desc;
 638         struct descriptor *prev;
 639         struct sqlca_t *sqlca = ECPGget_sqlca();
 640
 641         ECPGinit_sqlca(sqlca);
 642         for (desc = get_descriptors(), prev = NULL; desc; prev = desc, desc = desc->next)
 643         {
 644                 if (!strcmp(name, desc->name))
 645                 {
 646                         if (prev)
 647                                 prev->next = desc->next;
 648                         else
 649                                 set_descriptors(desc->next);
 650                         descriptor_free(desc);
 651                         return true;
 652                 }
 653         }
 654         ECPGraise(line, ECPG_UNKNOWN_DESCRIPTOR, ECPG_SQLSTATE_INVALID_SQL_DESCRIPTOR_NAME, name);
 655         return false;
 656 }
 657
 658 /* Deallocate all descriptors in the list */
 659 static void
 660 descriptor_deallocate_all(struct descriptor *list)
 661 {
 662         while (list)
 663         {
 664                 struct descriptor *next = list->next;
 665                 descriptor_free(list);
 666                 list = next;
 667         }
 668 }
 669
 670 bool
 671 ECPGallocate_desc(int line, const char *name)
 672 {
 673         struct descriptor *new;
 674         struct sqlca_t *sqlca = ECPGget_sqlca();
 675
 676         ECPGinit_sqlca(sqlca);
 677         new = (struct descriptor *) ECPGalloc(sizeof(struct descriptor), line);
 678         if (!new)
 679                 return false;
 680         new->next = get_descriptors();
 681         new->name = ECPGalloc(strlen(name) + 1, line);
 682         if (!new->name)
 683         {
 684                 ECPGfree(new);
 685                 return false;
 686         }
 687         new->count = -1;
 688         new->items = NULL;
 689         new->result = PQmakeEmptyPGresult(NULL, 0);
 690         if (!new->result)
 691         {
 692                 ECPGfree(new->name);
 693                 ECPGfree(new);
 694                 ECPGraise(line, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
 695                 return false;
 696         }
 697         strcpy(new->name, name);
 698         set_descriptors(new);
 699         return true;
 700 }
 701
 702 /* Find descriptor with name in the connection. */
 703 struct descriptor *
 704 ECPGfind_desc(int line, const char *name)
 705 {
 706         struct descriptor *desc;
 707
 708         for (desc = get_descriptors(); desc; desc = desc->next)
 709         {
 710                 if (strcmp(name, desc->name) == 0)
 711                         return desc;
 712         }
 713
 714         ECPGraise(line, ECPG_UNKNOWN_DESCRIPTOR, ECPG_SQLSTATE_INVALID_SQL_DESCRIPTOR_NAME, name);
 715         return NULL;    /* not found */
 716 }
 717
 718 bool
 719 ECPGdescribe(int line, bool input, const char *statement,...)
 720 {
 721         ECPGlog("ECPGdescribe called on line %d for %s in %s\n", line, (input) ? "input" : "output", statement);
 722         return false;
 723 }