2 * Copyright (c) 1995-2002, Index Data.
3 * See the file LICENSE for details.
5 * $Id: pquery.c,v 1.12 2002-01-23 20:25:42 adam Exp $
12 #include <yaz/proto.h>
14 #include <yaz/pquery.h>
16 static oid_value p_query_dfset = VAL_NONE;
19 const char *query_buf;
29 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o, oid_proto,
30 int num_attr, int max_attr,
31 int *attr_list, char **attr_clist,
34 static enum oid_value query_oid_getvalbyname (struct lex_info *li)
41 memcpy (buf, li->lex_buf, li->lex_len);
42 buf[li->lex_len] = '\0';
43 value = oid_getvalbyname (buf);
47 static int compare_term (struct lex_info *li, const char *src, size_t off)
49 size_t len=strlen(src);
51 if (li->lex_len == len+off && !memcmp (li->lex_buf+off, src, len-off))
56 static int query_token (struct lex_info *li)
59 const char *sep_match;
60 const char **qptr = &li->query_buf;
67 if ((sep_match = strchr (li->left_sep, **qptr)))
69 sep_char = li->right_sep[sep_match - li->left_sep];
74 while (**qptr && **qptr != sep_char)
86 if (li->lex_len >= 1 && li->lex_buf[0] == li->escape_char)
88 if (compare_term (li, "and", 1))
90 if (compare_term (li, "or", 1))
92 if (compare_term (li, "not", 1))
94 if (compare_term (li, "attr", 1))
96 if (compare_term (li, "set", 1))
98 if (compare_term (li, "attrset", 1))
100 if (compare_term (li, "prox", 1))
102 if (compare_term (li, "term", 1))
108 static int lex (struct lex_info *li)
110 return li->query_look = query_token (li);
113 static int escape_string(char *out_buf, const char *in, int len)
118 if (*in == '\\' && len > 0)
144 sscanf (s, "%x", &n);
161 sscanf (s, "%o", &n);
173 return out - out_buf;
176 static int p_query_parse_attr(struct lex_info *li, ODR o,
177 int num_attr, int *attr_list,
178 char **attr_clist, oid_value *attr_set)
181 if (!(cp = strchr (li->lex_buf, '=')) ||
182 (size_t) (cp-li->lex_buf) > li->lex_len)
184 attr_set[num_attr] = query_oid_getvalbyname (li);
185 if (attr_set[num_attr] == VAL_NONE)
189 if (!(cp = strchr (li->lex_buf, '=')))
195 attr_set[num_attr] = attr_set[num_attr-1];
197 attr_set[num_attr] = VAL_NONE;
199 attr_list[2*num_attr] = atoi(li->lex_buf);
201 if (*cp >= '0' && *cp <= '9')
203 attr_list[2*num_attr+1] = atoi (cp);
204 attr_clist[num_attr] = 0;
208 int len = li->lex_len - (cp - li->lex_buf);
209 attr_list[2*num_attr+1] = 0;
210 attr_clist[num_attr] = (char *) odr_malloc (o, len+1);
211 len = escape_string(attr_clist[num_attr], cp, len);
212 attr_clist[num_attr][len] = '\0';
217 static Z_AttributesPlusTerm *rpn_term (struct lex_info *li, ODR o,
219 int num_attr, int *attr_list,
220 char **attr_clist, oid_value *attr_set)
222 Z_AttributesPlusTerm *zapt;
225 Z_AttributeElement **elements;
227 zapt = (Z_AttributesPlusTerm *)odr_malloc (o, sizeof(*zapt));
228 term_octet = (Odr_oct *)odr_malloc (o, sizeof(*term_octet));
229 term = (Z_Term *)odr_malloc (o, sizeof(*term));
232 elements = (Z_AttributeElement**)odr_nullval();
238 elements = (Z_AttributeElement**)
239 odr_malloc (o, num_attr * sizeof(*elements));
241 attr_tmp = (int *)odr_malloc (o, num_attr * 2 * sizeof(int));
242 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
243 for (i = num_attr; --i >= 0; )
246 for (j = i+1; j<num_attr; j++)
247 if (attr_tmp[2*j] == attr_tmp[2*i])
252 (Z_AttributeElement*)odr_malloc (o,sizeof(**elements));
253 elements[k]->attributeType = &attr_tmp[2*i];
254 elements[k]->attributeSet =
255 yaz_oidval_to_z3950oid(o, CLASS_ATTSET, attr_set[i]);
259 elements[k]->which = Z_AttributeValue_complex;
260 elements[k]->value.complex = (Z_ComplexAttribute *)
261 odr_malloc (o, sizeof(Z_ComplexAttribute));
262 elements[k]->value.complex->num_list = 1;
263 elements[k]->value.complex->list =
264 (Z_StringOrNumeric **)
265 odr_malloc (o, 1 * sizeof(Z_StringOrNumeric *));
266 elements[k]->value.complex->list[0] =
267 (Z_StringOrNumeric *)
268 odr_malloc (o, sizeof(Z_StringOrNumeric));
269 elements[k]->value.complex->list[0]->which =
270 Z_StringOrNumeric_string;
271 elements[k]->value.complex->list[0]->u.string =
273 elements[k]->value.complex->semanticAction = (int **)
275 elements[k]->value.complex->num_semanticAction = 0;
279 elements[k]->which = Z_AttributeValue_numeric;
280 elements[k]->value.numeric = &attr_tmp[2*i+1];
286 zapt->attributes = (Z_AttributeList *)
287 odr_malloc (o, sizeof(*zapt->attributes));
288 zapt->attributes->num_attributes = num_attr;
289 zapt->attributes->attributes = elements;
292 term->which = Z_Term_general;
293 term->u.general = term_octet;
294 term_octet->buf = (unsigned char *)odr_malloc (o, li->lex_len);
295 term_octet->size = term_octet->len =
296 escape_string ((char *) (term_octet->buf), li->lex_buf, li->lex_len);
300 static Z_Operand *rpn_simple (struct lex_info *li, ODR o, oid_proto proto,
301 int num_attr, int *attr_list, char **attr_clist,
306 zo = (Z_Operand *)odr_malloc (o, sizeof(*zo));
307 switch (li->query_look)
310 zo->which = Z_Operand_APT;
311 if (!(zo->u.attributesPlusTerm =
312 rpn_term (li, o, proto, num_attr, attr_list, attr_clist,
321 zo->which = Z_Operand_resultSetId;
322 zo->u.resultSetId = (char *)odr_malloc (o, li->lex_len+1);
323 memcpy (zo->u.resultSetId, li->lex_buf, li->lex_len);
324 zo->u.resultSetId[li->lex_len] = '\0';
333 static Z_ProximityOperator *rpn_proximity (struct lex_info *li, ODR o)
335 Z_ProximityOperator *p = (Z_ProximityOperator *)odr_malloc (o, sizeof(*p));
339 if (*li->lex_buf == '1')
341 p->exclusion = (int *)odr_malloc (o, sizeof(*p->exclusion));
344 else if (*li->lex_buf == '0')
346 p->exclusion = (int *)odr_malloc (o, sizeof(*p->exclusion));
354 p->distance = (int *)odr_malloc (o, sizeof(*p->distance));
355 *p->distance = atoi (li->lex_buf);
359 p->ordered = (int *)odr_malloc (o, sizeof(*p->ordered));
360 *p->ordered = atoi (li->lex_buf);
364 p->relationType = (int *)odr_malloc (o, sizeof(*p->relationType));
365 *p->relationType = atoi (li->lex_buf);
369 if (*li->lex_buf == 'k')
371 else if (*li->lex_buf == 'p')
374 p->which = atoi (li->lex_buf);
378 p->which = Z_ProximityOperator_known;
379 p->u.known = (int *)odr_malloc (o, sizeof(*p->u.known));
380 *p->u.known = atoi (li->lex_buf);
384 static Z_Complex *rpn_complex (struct lex_info *li, ODR o, oid_proto proto,
385 int num_attr, int max_attr,
386 int *attr_list, char **attr_clist,
392 zc = (Z_Complex *)odr_malloc (o, sizeof(*zc));
393 zo = (Z_Operator *)odr_malloc (o, sizeof(*zo));
395 switch (li->query_look)
398 zo->which = Z_Operator_and;
399 zo->u.and_not = odr_nullval();
402 zo->which = Z_Operator_or;
403 zo->u.and_not = odr_nullval();
406 zo->which = Z_Operator_and_not;
407 zo->u.and_not = odr_nullval();
410 zo->which = Z_Operator_prox;
411 zo->u.prox = rpn_proximity (li, o);
420 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
421 attr_clist, attr_set)))
424 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
425 attr_clist, attr_set)))
430 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o,
432 int num_attr, int max_attr,
439 sz = (Z_RPNStructure *)odr_malloc (o, sizeof(*sz));
440 switch (li->query_look)
446 sz->which = Z_RPNStructure_complex;
447 if (!(sz->u.complex =
448 rpn_complex (li, o, proto, num_attr, max_attr, attr_list,
449 attr_clist, attr_set)))
454 sz->which = Z_RPNStructure_simple;
456 rpn_simple (li, o, proto, num_attr, attr_list,
457 attr_clist, attr_set)))
464 if (num_attr >= max_attr)
466 if (!p_query_parse_attr(li, o, num_attr, attr_list,
467 attr_clist, attr_set))
472 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
473 attr_clist, attr_set);
478 if (compare_term (li, "general", 0))
479 li->term_type = Z_Term_general;
480 else if (compare_term (li, "numeric", 0))
481 li->term_type = Z_Term_numeric;
482 else if (compare_term (li, "string", 0))
483 li->term_type = Z_Term_characterString;
484 else if (compare_term (li, "oid", 0))
485 li->term_type = Z_Term_oid;
486 else if (compare_term (li, "datetime", 0))
487 li->term_type = Z_Term_dateTime;
488 else if (compare_term (li, "null", 0))
489 li->term_type = Z_Term_null;
492 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
493 attr_clist, attr_set);
494 case 0: /* operator/operand expected! */
500 Z_RPNQuery *p_query_rpn_mk (ODR o, struct lex_info *li, oid_proto proto,
504 int attr_array[1024];
505 char *attr_clist[512];
506 oid_value attr_set[512];
507 oid_value topSet = VAL_NONE;
509 zq = (Z_RPNQuery *)odr_malloc (o, sizeof(*zq));
511 if (li->query_look == 'r')
514 topSet = query_oid_getvalbyname (li);
515 if (topSet == VAL_NONE)
520 if (topSet == VAL_NONE)
521 topSet = p_query_dfset;
522 if (topSet == VAL_NONE)
525 zq->attributeSetId = yaz_oidval_to_z3950oid(o, CLASS_ATTSET, topSet);
527 if (!zq->attributeSetId)
530 if (!(zq->RPNStructure = rpn_structure (li, o, proto, 0, 512,
531 attr_array, attr_clist, attr_set)))
536 Z_RPNQuery *p_query_rpn (ODR o, oid_proto proto,
542 li.right_sep = "}\"";
543 li.escape_char = '@';
544 li.term_type = Z_Term_general;
546 return p_query_rpn_mk (o, &li, proto, qbuf);
550 Z_AttributesPlusTerm *p_query_scan_mk (struct lex_info *li,
551 ODR o, oid_proto proto,
552 Odr_oid **attributeSetP,
556 char *attr_clist[512];
557 oid_value attr_set[512];
560 oid_value topSet = VAL_NONE;
563 if (li->query_look == 'r')
566 topSet = query_oid_getvalbyname (li);
570 if (topSet == VAL_NONE)
571 topSet = p_query_dfset;
572 if (topSet == VAL_NONE)
575 *attributeSetP = yaz_oidval_to_z3950oid (o, CLASS_ATTSET, topSet);
577 while (li->query_look == 'l')
582 if (num_attr >= max_attr)
584 if (!p_query_parse_attr(li, o, num_attr, attr_list,
585 attr_clist, attr_set))
592 return rpn_term (li, o, proto, num_attr, attr_list, attr_clist, attr_set);
595 Z_AttributesPlusTerm *p_query_scan (ODR o, oid_proto proto,
596 Odr_oid **attributeSetP,
602 li.right_sep = "}\"";
603 li.escape_char = '@';
604 li.term_type = Z_Term_general;
607 return p_query_scan_mk (&li, o, proto, attributeSetP, qbuf);
610 int p_query_attset (const char *arg)
612 p_query_dfset = oid_getvalbyname (arg);
613 return (p_query_dfset == VAL_NONE) ? -1 : 0;