src/parser/analyzer.c

   1 /*
   2  * SysDB - src/parser/analyzer.c
   3  * Copyright (C) 2014-2015 Sebastian 'tokkee' Harl <sh@tokkee.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  17  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
  19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "sysdb.h"
  29
  30 #include "parser/ast.h"
  31 #include "parser/parser.h"
  32 #include "utils/error.h"
  33 #include "utils/strbuf.h"
  34
  35 #include <assert.h>
  36 #include <stdarg.h>
  37
  38 #define VALID_OBJ_TYPE(t) ((SDB_HOST <= (t)) && ((t) <= SDB_METRIC))
  39
  40 #define FILTER_CONTEXT -1
  41 #define UNSPEC_CONTEXT -2
  42
  43 static int
  44 analyze_node(int context, sdb_ast_node_t *node, sdb_strbuf_t *errbuf);
  45
  46 /*
  47  * error reporting
  48  */
  49
  50 static void
  51 op_error(sdb_strbuf_t *errbuf, sdb_ast_op_t *op, const char *reason)
  52 {
  53         sdb_strbuf_sprintf(errbuf, "Invalid operation %s %s %s (%s)",
  54                         SDB_TYPE_TO_STRING(op->left->data_type),
  55                         SDB_AST_OP_TO_STRING(op->kind),
  56                         SDB_TYPE_TO_STRING(op->right->data_type),
  57                         reason);
  58 } /* op_error */
  59
  60 static void
  61 __attribute__((format(printf, 3, 4)))
  62 iter_error(sdb_strbuf_t *errbuf, sdb_ast_iter_t *iter, const char *reason, ...)
  63 {
  64         char r[1024];
  65         va_list ap;
  66
  67         va_start(ap, reason);
  68         vsnprintf(r, sizeof(r), reason, ap);
  69         va_end(ap);
  70
  71         assert((iter->expr->type == SDB_AST_TYPE_OPERATOR)
  72                         && (! SDB_AST_OP(iter->expr)->left));
  73         sdb_strbuf_sprintf(errbuf, "Invalid iterator %s %s %s %s (%s)",
  74                         SDB_AST_OP_TO_STRING(iter->kind),
  75                         SDB_TYPE_TO_STRING(iter->iter->data_type),
  76                         SDB_AST_OP_TO_STRING(SDB_AST_OP(iter->expr)->kind),
  77                         SDB_TYPE_TO_STRING(SDB_AST_OP(iter->expr)->right->data_type),
  78                         r);
  79 } /* iter_error */
  80
  81 /*
  82  * expression nodes
  83  */
  84
  85 static int
  86 analyze_logical(int context, sdb_ast_op_t *op, sdb_strbuf_t *errbuf)
  87 {
  88         switch (op->kind) {
  89         case SDB_AST_OR:
  90         case SDB_AST_AND:
  91                 if (! SDB_AST_IS_LOGICAL(op->left)) {
  92                         sdb_strbuf_sprintf(errbuf, "Invalid left operand (%s) "
  93                                         "in %s expression", SDB_AST_TYPE_TO_STRING(op->left),
  94                                         SDB_AST_OP_TO_STRING(op->kind));
  95                         return -1;
  96                 }
  97                 if (analyze_node(context, op->left, errbuf))
  98                         return -1;
  99                 /* fallthrough */
 100         case SDB_AST_NOT:
 101                 if (! SDB_AST_IS_LOGICAL(op->right)) {
 102                         sdb_strbuf_sprintf(errbuf, "Invalid right operand (%s) "
 103                                         "in %s expression", SDB_AST_TYPE_TO_STRING(op->right),
 104                                         SDB_AST_OP_TO_STRING(op->kind));
 105                         return -1;
 106                 }
 107                 if (analyze_node(context, op->right, errbuf))
 108                         return -1;
 109                 break;
 110
 111         case SDB_AST_LT:
 112         case SDB_AST_LE:
 113         case SDB_AST_EQ:
 114         case SDB_AST_NE:
 115         case SDB_AST_GE:
 116         case SDB_AST_GT:
 117         {
 118                 if (analyze_node(context, op->left, errbuf))
 119                         return -1;
 120                 if (analyze_node(context, op->right, errbuf))
 121                         return -1;
 122
 123                 if ((op->left->data_type > 0) && (op->right->data_type > 0)) {
 124                         if (op->left->data_type == op->right->data_type)
 125                                 return 0;
 126                         op_error(errbuf, op, "type mismatch");
 127                         return -1;
 128                 }
 129                 if ((op->left->data_type > 0) && (op->left->data_type & SDB_TYPE_ARRAY)) {
 130                         op_error(errbuf, op, "array not allowed");
 131                         return -1;
 132                 }
 133                 if ((op->right->data_type > 0) && (op->right->data_type & SDB_TYPE_ARRAY)) {
 134                         op_error(errbuf, op, "array not allowed");
 135                         return -1;
 136                 }
 137                 break;
 138         }
 139
 140         case SDB_AST_REGEX:
 141         case SDB_AST_NREGEX:
 142                 if (analyze_node(context, op->left, errbuf))
 143                         return -1;
 144                 if (analyze_node(context, op->right, errbuf))
 145                         return -1;
 146
 147                 /* all types are supported for the left operand
 148                  * TODO: introduce a cast operator if it's not a string */
 149                 if ((op->right->data_type > 0)
 150                                 && (op->right->data_type != SDB_TYPE_REGEX)
 151                                 && (op->right->data_type != SDB_TYPE_STRING)) {
 152                         op_error(errbuf, op, "invalid regex");
 153                         return -1;
 154                 }
 155                 break;
 156
 157         case SDB_AST_ISNULL:
 158                 if (analyze_node(context, op->right, errbuf))
 159                         return -1;
 160                 break;
 161
 162         case SDB_AST_IN:
 163                 if (analyze_node(context, op->left, errbuf))
 164                         return -1;
 165                 if (analyze_node(context, op->right, errbuf))
 166                         return -1;
 167
 168                 if ((op->right->data_type > 0) && (! (op->right->data_type & SDB_TYPE_ARRAY))) {
 169                         op_error(errbuf, op, "array expected");
 170                         return -1;
 171                 }
 172                 /* the left operand may be a scalar or an array but the element
 173                  * type has to match */
 174                 if ((op->left->data_type > 0) && (op->right->data_type > 0)
 175                                 && ((op->left->data_type & 0xff) != (op->right->data_type & 0xff))) {
 176                         op_error(errbuf, op, "type mismatch");
 177                         return -1;
 178                 }
 179                 break;
 180
 181         default:
 182                 sdb_strbuf_sprintf(errbuf, "Unknown operand type %d", op->kind);
 183                 return -1;
 184         }
 185         return 0;
 186 } /* analyze_logical */
 187
 188 static int
 189 analyze_arith(int context, sdb_ast_op_t *op, sdb_strbuf_t *errbuf)
 190 {
 191         if (analyze_node(context, op->left, errbuf))
 192                 return -1;
 193         if (analyze_node(context, op->right, errbuf))
 194                 return -1;
 195         SDB_AST_NODE(op)->data_type = sdb_data_expr_type(SDB_AST_OP_TO_DATA_OP(op->kind),
 196                         op->left->data_type, op->right->data_type);
 197
 198         if ((op->left->data_type > 0) && (op->right->data_type > 0)
 199                         && (SDB_AST_NODE(op)->data_type <= 0)) {
 200                 op_error(errbuf, op, "type mismatch");
 201                 return -1;
 202         }
 203
 204         /* TODO: replace constant arithmetic operations with a constant value */
 205         return 0;
 206 } /* analyze_arith */
 207
 208 static int
 209 analyze_iter(int context, sdb_ast_iter_t *iter, sdb_strbuf_t *errbuf)
 210 {
 211         sdb_ast_const_t c = SDB_AST_CONST_INIT;
 212         int iter_context = context;
 213         int status;
 214
 215         if (iter->iter->type == SDB_AST_TYPE_TYPED)
 216                 iter_context = SDB_AST_TYPED(iter->iter)->type;
 217
 218         if (analyze_node(iter_context, iter->iter, errbuf))
 219                 return -1;
 220         if (iter->iter->data_type > 0)
 221                 c.value.type = iter->iter->data_type & 0xff;
 222         else
 223                 c.value.type = -1;
 224
 225         /* TODO: support other setups as well */
 226         assert((iter->expr->type == SDB_AST_TYPE_OPERATOR)
 227                         && (! SDB_AST_OP(iter->expr)->left));
 228         SDB_AST_OP(iter->expr)->left = SDB_AST_NODE(&c);
 229         status = analyze_node(context, iter->expr, errbuf);
 230         SDB_AST_OP(iter->expr)->left = NULL;
 231         if (status)
 232                 return -1;
 233
 234         if (iter->iter->type == SDB_AST_TYPE_TYPED) {
 235                 int iter_type = SDB_AST_TYPED(iter->iter)->type;
 236
 237                 if (iter_type == SDB_ATTRIBUTE) {
 238                         /* attributes are always iterable */
 239                 }
 240                 else if ((context != SDB_HOST) && (context != SDB_SERVICE)
 241                                 && (context != SDB_METRIC) && (context != UNSPEC_CONTEXT)) {
 242                         iter_error(errbuf, iter, "%s not iterable in %s context",
 243                                         SDB_STORE_TYPE_TO_NAME(iter_type),
 244                                         SDB_STORE_TYPE_TO_NAME(context));
 245                         return -1;
 246                 }
 247
 248                 if ((context == iter_type)
 249                                 || ((iter_type != SDB_SERVICE)
 250                                         && (iter_type != SDB_METRIC)
 251                                         && (iter_type != SDB_ATTRIBUTE))
 252                                 || ((context == SDB_SERVICE)
 253                                         && (iter_type == SDB_METRIC))
 254                                 || ((context == SDB_METRIC)
 255                                         && (iter_type == SDB_SERVICE))) {
 256                         iter_error(errbuf, iter, "%s not iterable in %s context",
 257                                         SDB_STORE_TYPE_TO_NAME(iter_type),
 258                                         SDB_STORE_TYPE_TO_NAME(context));
 259                         return -1;
 260                 }
 261         }
 262         else if (iter->iter->type == SDB_AST_TYPE_VALUE) {
 263                 int iter_type = SDB_AST_VALUE(iter->iter)->type;
 264
 265                 if (iter_type == SDB_FIELD_BACKEND) {
 266                         /* backends are always iterable */
 267                 }
 268                 else if ((context != SDB_HOST) && (context != SDB_SERVICE)
 269                                 && (context != SDB_METRIC) && (context != SDB_ATTRIBUTE)
 270                                 && (context != UNSPEC_CONTEXT)) {
 271                         iter_error(errbuf, iter, "%s not iterable in %s context",
 272                                         (iter_type == SDB_ATTRIBUTE)
 273                                                 ? "attribute"
 274                                                 : SDB_FIELD_TO_NAME(iter_type),
 275                                         SDB_STORE_TYPE_TO_NAME(context));
 276                         return -1;
 277                 }
 278         }
 279         else if (iter->iter->type == SDB_AST_TYPE_CONST) {
 280                 if (! (SDB_AST_CONST(iter->iter)->value.type & SDB_TYPE_ARRAY)) {
 281                         iter_error(errbuf, iter, "%s not iterable",
 282                                         SDB_TYPE_TO_STRING(SDB_AST_CONST(iter->iter)->value.type));
 283                         return -1;
 284                 }
 285         }
 286         return 0;
 287 } /* analyze_iter */
 288
 289 static int
 290 analyze_const(int __attribute__((unused)) context, sdb_ast_const_t *c,
 291                 sdb_strbuf_t __attribute__((unused)) *errbuf)
 292 {
 293         SDB_AST_NODE(c)->data_type = c->value.type;
 294         return 0;
 295 } /* analyze_const */
 296
 297 static int
 298 analyze_value(int context, sdb_ast_value_t *v, sdb_strbuf_t *errbuf)
 299 {
 300         if (v->type != SDB_ATTRIBUTE)
 301                 SDB_AST_NODE(v)->data_type = SDB_FIELD_TYPE(v->type);
 302
 303         if ((v->type != SDB_ATTRIBUTE) && v->name) {
 304                 sdb_strbuf_sprintf(errbuf, "Invalid expression %s[%s]",
 305                                 SDB_FIELD_TO_NAME(v->type), v->name);
 306                 return -1;
 307         }
 308         else if ((v->type == SDB_ATTRIBUTE) && (! v->name)) {
 309                 sdb_strbuf_sprintf(errbuf, "Invalid expression attribute[] "
 310                                 "(missing name)");
 311                 return -1;
 312         }
 313
 314         if ((context != SDB_ATTRIBUTE) && (v->type == SDB_FIELD_VALUE)) {
 315                 sdb_strbuf_sprintf(errbuf, "Invalid expression %s.value",
 316                                 SDB_FIELD_TO_NAME(v->type));
 317                 return -1;
 318         }
 319         return 0;
 320 } /* analyze_value */
 321
 322 static int
 323 analyze_typed(int context, sdb_ast_typed_t *t, sdb_strbuf_t *errbuf)
 324 {
 325         if ((t->expr->type != SDB_AST_TYPE_VALUE)
 326                         && (t->expr->type != SDB_AST_TYPE_TYPED)) {
 327                 sdb_strbuf_sprintf(errbuf, "Invalid expression %s.%s",
 328                                 SDB_STORE_TYPE_TO_NAME(t->type),
 329                                 SDB_AST_TYPE_TO_STRING(t->expr));
 330                 return -1;
 331         }
 332         if (analyze_node(t->type, t->expr, errbuf))
 333                 return -1;
 334         SDB_AST_NODE(t)->data_type = t->expr->data_type;
 335
 336         if ((t->type != SDB_ATTRIBUTE) && (! VALID_OBJ_TYPE(t->type))) {
 337                 sdb_strbuf_sprintf(errbuf, "Invalid expression %#x.%s",
 338                                 t->type, SDB_AST_TYPE_TO_STRING(t->expr));
 339                 return -1;
 340         }
 341
 342         /* self-references are allowed and services and metrics may reference
 343          * their parent host; everything may reference attributes */
 344         if ((context != t->type) && (context != UNSPEC_CONTEXT)
 345                         && (((context != SDB_SERVICE) && (context != SDB_METRIC))
 346                                 || (t->type != SDB_HOST))
 347                         && (t->type != SDB_ATTRIBUTE)) {
 348                 sdb_strbuf_sprintf(errbuf, "Invalid expression %s.%s in %s context",
 349                                 SDB_STORE_TYPE_TO_NAME(t->type),
 350                                 SDB_AST_TYPE_TO_STRING(t->expr),
 351                                 context == -1 ? "generic" : SDB_STORE_TYPE_TO_NAME(context));
 352                 return -1;
 353         }
 354         return 0;
 355 } /* analyze_typed */
 356
 357 static int
 358 analyze_node(int context, sdb_ast_node_t *node, sdb_strbuf_t *errbuf)
 359 {
 360         if (! node) {
 361                 sdb_strbuf_sprintf(errbuf, "Empty AST node");
 362                 return -1;
 363         }
 364
 365         /* unknown by default */
 366         node->data_type = -1;
 367
 368         if ((node->type == SDB_AST_TYPE_OPERATOR)
 369                         && (SDB_AST_IS_LOGICAL(node)))
 370                 return analyze_logical(context, SDB_AST_OP(node), errbuf);
 371         else if ((node->type == SDB_AST_TYPE_OPERATOR)
 372                         && (SDB_AST_IS_ARITHMETIC(node)))
 373                 return analyze_arith(context, SDB_AST_OP(node), errbuf);
 374         else if (node->type == SDB_AST_TYPE_ITERATOR)
 375                 return analyze_iter(context, SDB_AST_ITER(node), errbuf);
 376         else if (node->type == SDB_AST_TYPE_CONST)
 377                 return analyze_const(context, SDB_AST_CONST(node), errbuf);
 378         else if (node->type == SDB_AST_TYPE_VALUE)
 379                 return analyze_value(context, SDB_AST_VALUE(node), errbuf);
 380         else if (node->type == SDB_AST_TYPE_TYPED)
 381                 return analyze_typed(context, SDB_AST_TYPED(node), errbuf);
 382
 383         sdb_strbuf_sprintf(errbuf, "Invalid expression node "
 384                         "of type %#x", node->type);
 385         return -1;
 386 } /* analyze_node */
 387
 388 /*
 389  * top level / command nodes
 390  */
 391
 392 static int
 393 analyze_fetch(sdb_ast_fetch_t *fetch, sdb_strbuf_t *errbuf)
 394 {
 395         if (! VALID_OBJ_TYPE(fetch->obj_type)) {
 396                 sdb_strbuf_sprintf(errbuf, "Invalid object type %#x "
 397                                 "in FETCH command", fetch->obj_type);
 398                 return -1;
 399         }
 400         if (! fetch->name) {
 401                 sdb_strbuf_sprintf(errbuf, "Missing object name in "
 402                                 "FETCH %s command", SDB_STORE_TYPE_TO_NAME(fetch->obj_type));
 403                 return -1;
 404         }
 405
 406         if ((fetch->obj_type == SDB_HOST) && fetch->hostname) {
 407                 sdb_strbuf_sprintf(errbuf, "Unexpected parent hostname '%s' "
 408                                 "in FETCH HOST command", fetch->hostname);
 409                 return -1;
 410         }
 411         else if ((fetch->obj_type != SDB_HOST) && (! fetch->hostname)) {
 412                 sdb_strbuf_sprintf(errbuf, "Missing parent hostname for '%s' "
 413                                 "in FETCH %s command", fetch->name,
 414                                 SDB_STORE_TYPE_TO_NAME(fetch->obj_type));
 415                 return -1;
 416         }
 417
 418         if (fetch->filter)
 419                 return analyze_node(FILTER_CONTEXT, fetch->filter, errbuf);
 420         return 0;
 421 } /* analyze_fetch */
 422
 423 static int
 424 analyze_list(sdb_ast_list_t *list, sdb_strbuf_t *errbuf)
 425 {
 426         if (! VALID_OBJ_TYPE(list->obj_type)) {
 427                 sdb_strbuf_sprintf(errbuf, "Invalid object type %#x "
 428                                 "in LIST command", list->obj_type);
 429                 return -1;
 430         }
 431         if (list->filter)
 432                 return analyze_node(FILTER_CONTEXT, list->filter, errbuf);
 433         return 0;
 434 } /* analyze_list */
 435
 436 static int
 437 analyze_lookup(sdb_ast_lookup_t *lookup, sdb_strbuf_t *errbuf)
 438 {
 439         if (! VALID_OBJ_TYPE(lookup->obj_type)) {
 440                 sdb_strbuf_sprintf(errbuf, "Invalid object type %#x "
 441                                 "in LOOKUP command", lookup->obj_type);
 442                 return -1;
 443         }
 444         if (lookup->matcher)
 445                 if (analyze_node(lookup->obj_type, lookup->matcher, errbuf))
 446                         return -1;
 447         if (lookup->filter)
 448                 return analyze_node(FILTER_CONTEXT, lookup->filter, errbuf);
 449         return 0;
 450 } /* analyze_lookup */
 451
 452 static int
 453 analyze_store(sdb_ast_store_t *st, sdb_strbuf_t *errbuf)
 454 {
 455         if ((st->obj_type != SDB_ATTRIBUTE)
 456                         && (! VALID_OBJ_TYPE(st->obj_type))) {
 457                 sdb_strbuf_sprintf(errbuf, "Invalid object type %#x "
 458                                 "in STORE command", st->obj_type);
 459                 return -1;
 460         }
 461         if (! st->name) {
 462                 sdb_strbuf_sprintf(errbuf, "Missing object name in "
 463                                 "STORE %s command", SDB_STORE_TYPE_TO_NAME(st->obj_type));
 464                 return -1;
 465         }
 466
 467         if ((st->obj_type == SDB_HOST) && st->hostname) {
 468                 sdb_strbuf_sprintf(errbuf, "Unexpected parent hostname '%s' "
 469                                 "in STORE HOST command", st->hostname);
 470                 return -1;
 471         }
 472         else if ((st->obj_type != SDB_HOST) && (! st->hostname)) {
 473                 sdb_strbuf_sprintf(errbuf, "Missing parent hostname for '%s' "
 474                                 "in STORE %s command", st->name,
 475                                 SDB_STORE_TYPE_TO_NAME(st->obj_type));
 476                 return -1;
 477         }
 478
 479         if (st->obj_type == SDB_ATTRIBUTE) {
 480                 if ((st->parent_type <= 0) && st->parent) {
 481                         sdb_strbuf_sprintf(errbuf, "Unexpected parent hostname '%s' "
 482                                         "in STORE %s command", st->parent,
 483                                         SDB_STORE_TYPE_TO_NAME(st->obj_type));
 484                         return -1;
 485                 }
 486                 else if (st->parent_type > 0) {
 487                         if (! VALID_OBJ_TYPE(st->parent_type)) {
 488                                 sdb_strbuf_sprintf(errbuf, "Invalid parent type %#x "
 489                                                 "in STORE %s command", st->parent_type,
 490                                                 SDB_STORE_TYPE_TO_NAME(st->obj_type));
 491                                 return -1;
 492                         }
 493                         if (! st->parent) {
 494                                 sdb_strbuf_sprintf(errbuf, "Missing %s parent name "
 495                                                 "in STORE %s command",
 496                                                 SDB_STORE_TYPE_TO_NAME(st->parent_type),
 497                                                 SDB_STORE_TYPE_TO_NAME(st->obj_type));
 498                                 return -1;
 499                         }
 500                 }
 501         }
 502         else if ((st->parent_type > 0) || st->parent) {
 503                 sdb_strbuf_sprintf(errbuf, "Unexpected %s parent name '%s' "
 504                                 "in STORE %s command",
 505                                 SDB_STORE_TYPE_TO_NAME(st->parent_type),
 506                                 st->parent ? st->parent : "<unknown>",
 507                                 SDB_STORE_TYPE_TO_NAME(st->obj_type));
 508                 return -1;
 509         }
 510
 511         if (st->obj_type == SDB_METRIC) {
 512                 if ((! st->store_type) != (! st->store_id)) {
 513                         sdb_strbuf_sprintf(errbuf, "Incomplete metric store %s %s "
 514                                         "in STORE METRIC command",
 515                                         st->store_type ? st->store_type : "<unknown>",
 516                                         st->store_id ? st->store_id : "<unknown>");
 517                         return -1;
 518                 }
 519         }
 520         else if (st->store_type || st->store_id) {
 521                 sdb_strbuf_sprintf(errbuf, "Unexpected metric store %s %s "
 522                                 "in STORE %s command",
 523                                 st->store_type ? st->store_type : "<unknown>",
 524                                 st->store_id ? st->store_id : "<unknown>",
 525                                 SDB_STORE_TYPE_TO_NAME(st->obj_type));
 526                 return -1;
 527         }
 528
 529         if ((! (st->obj_type == SDB_ATTRIBUTE))
 530                         && (st->value.type != SDB_TYPE_NULL)) {
 531                 char v_str[sdb_data_format(&st->value, NULL, 0, SDB_DOUBLE_QUOTED) + 1];
 532                 sdb_data_format(&st->value, v_str, sizeof(v_str), SDB_DOUBLE_QUOTED);
 533                 sdb_strbuf_sprintf(errbuf, "Unexpected value %s in STORE %s command",
 534                                 v_str, SDB_STORE_TYPE_TO_NAME(st->obj_type));
 535                 return -1;
 536         }
 537         return 0;
 538 } /* analyze_store */
 539
 540 static int
 541 analyze_timeseries(sdb_ast_timeseries_t *ts, sdb_strbuf_t *errbuf)
 542 {
 543         if (! ts->hostname) {
 544                 sdb_strbuf_sprintf(errbuf, "Missing hostname in STORE command");
 545                 return -1;
 546         }
 547         if (! ts->metric) {
 548                 sdb_strbuf_sprintf(errbuf, "Missing metric name in STORE command");
 549                 return -1;
 550         }
 551         if (ts->end <= ts->start) {
 552                 char start_str[64], end_str[64];
 553                 sdb_strftime(start_str, sizeof(start_str), "%F %T Tz", ts->start);
 554                 sdb_strftime(end_str, sizeof(end_str), "%F %T Tz", ts->end);
 555                 sdb_strbuf_sprintf(errbuf, "Start time (%s) greater than "
 556                                 "end time (%s) in STORE command", start_str, end_str);
 557                 return -1;
 558         }
 559         return 0;
 560 } /* analyze_timeseries */
 561
 562 /*
 563  * public API
 564  */
 565
 566 int
 567 sdb_parser_analyze(sdb_ast_node_t *node, sdb_strbuf_t *errbuf)
 568 {
 569         if (! node) {
 570                 sdb_strbuf_sprintf(errbuf, "Empty AST node");
 571                 return -1;
 572         }
 573
 574         /* top-level nodes don't have a type */
 575         node->data_type = -1;
 576
 577         if (node->type == SDB_AST_TYPE_FETCH)
 578                 return analyze_fetch(SDB_AST_FETCH(node), errbuf);
 579         else if (node->type == SDB_AST_TYPE_LIST)
 580                 return analyze_list(SDB_AST_LIST(node), errbuf);
 581         else if (node->type == SDB_AST_TYPE_LOOKUP)
 582                 return analyze_lookup(SDB_AST_LOOKUP(node), errbuf);
 583         else if (node->type == SDB_AST_TYPE_STORE)
 584                 return analyze_store(SDB_AST_STORE(node), errbuf);
 585         else if (node->type == SDB_AST_TYPE_TIMESERIES)
 586                 return analyze_timeseries(SDB_AST_TIMESERIES(node), errbuf);
 587
 588         sdb_strbuf_sprintf(errbuf, "Invalid top-level AST node "
 589                         "of type %#x", node->type);
 590         return -1;
 591 } /* sdb_parser_analyze */
 592
 593 int
 594 sdb_parser_analyze_conditional(sdb_ast_node_t *node, sdb_strbuf_t *errbuf)
 595 {
 596         if (! node) {
 597                 sdb_strbuf_sprintf(errbuf, "Empty conditional node");
 598                 return -1;
 599         }
 600         if (! SDB_AST_IS_LOGICAL(node)) {
 601                 sdb_strbuf_sprintf(errbuf, "Not a conditional node (got %s)",
 602                                 SDB_AST_TYPE_TO_STRING(node));
 603                 return -1;
 604         }
 605         return analyze_node(UNSPEC_CONTEXT, node, errbuf);
 606 } /* sdb_parser_analyze_conditional */
 607
 608 int
 609 sdb_parser_analyze_arith(sdb_ast_node_t *node, sdb_strbuf_t *errbuf)
 610 {
 611         if (! node) {
 612                 sdb_strbuf_sprintf(errbuf, "Empty arithmetic node");
 613                 return -1;
 614         }
 615         if (! SDB_AST_IS_ARITHMETIC(node)) {
 616                 sdb_strbuf_sprintf(errbuf, "Not an arithmetic node (got %s)",
 617                                 SDB_AST_TYPE_TO_STRING(node));
 618                 return -1;
 619         }
 620         return analyze_node(UNSPEC_CONTEXT, node, errbuf);
 621 } /* sdb_parser_analyze_arith */
 622
 623 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 624