2 * Copyright (c) 1995-1997, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.19 1998-03-05 08:09:03 adam
8 * Minor change to make C++ happy.
10 * Revision 1.18 1998/02/11 11:53:36 adam
11 * Changed code so that it compiles as C++.
13 * Revision 1.17 1997/11/24 11:33:57 adam
14 * Using function odr_nullval() instead of global ODR_NULLVAL when
17 * Revision 1.16 1997/09/29 13:19:00 adam
18 * Added function, oid_ent_to_oid, to replace the function
19 * oid_getoidbyent, which is not thread safe.
21 * Revision 1.15 1997/09/29 07:13:43 adam
22 * Changed type of a few variables to avoid warnings.
24 * Revision 1.14 1997/09/22 12:33:41 adam
25 * Fixed bug introduced by previous commit.
27 * Revision 1.13 1997/09/17 12:10:42 adam
30 * Revision 1.12 1997/09/01 08:54:13 adam
31 * New windows NT/95 port using MSV5.0. Made prefix query handling
32 * thread safe. The function options ignores empty arguments when met.
34 * Revision 1.11 1996/11/11 13:15:29 adam
35 * Added proximity operator.
37 * Revision 1.10 1996/08/12 14:10:35 adam
38 * New function p_query_attset to define default attribute set.
40 * Revision 1.9 1996/03/15 11:03:46 adam
41 * Attribute set can be set globally for a query with the @attrset
42 * operator. The @attr operator has an optional attribute-set specifier
43 * that sets the attribute set locally.
45 * Revision 1.8 1996/01/02 11:46:56 quinn
46 * Changed 'operator' to 'roperator' to avoid C++ conflict.
48 * Revision 1.7 1995/09/29 17:12:36 quinn
51 * Revision 1.6 1995/09/27 15:03:03 quinn
52 * Modified function heads & prototypes.
54 * Revision 1.5 1995/06/15 12:31:02 quinn
55 * *** empty log message ***
57 * Revision 1.4 1995/06/15 07:45:19 quinn
60 * Revision 1.3 1995/06/14 11:06:35 adam
61 * Bug fix: Attributes wasn't interpreted correctly!
63 * Revision 1.2 1995/05/26 08:56:11 adam
64 * New function: p_query_scan.
66 * Revision 1.1 1995/05/22 15:31:49 adam
67 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
80 static oid_value p_query_dfset = VAL_NONE;
83 const char *query_buf;
93 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o, oid_proto,
94 int num_attr, int max_attr,
95 int *attr_list, oid_value *attr_set);
97 static enum oid_value query_oid_getvalbyname (struct lex_info *li)
101 if (li->lex_len > 31)
103 memcpy (buf, li->lex_buf, li->lex_len);
104 buf[li->lex_len] = '\0';
105 return oid_getvalbyname (buf);
108 static int compare_term (struct lex_info *li, const char *src, size_t off)
110 size_t len=strlen(src);
112 if (li->lex_len == len+off && !memcmp (li->lex_buf+off, src, len-off))
117 static int query_token (struct lex_info *li)
119 const char *sep_match;
120 const char **qptr = &li->query_buf;
122 while (**qptr == ' ')
127 if ((sep_match = strchr (li->left_sep, **qptr)))
129 int sep_index = sep_match - li->left_sep;
133 while (**qptr && **qptr != li->right_sep[sep_index])
144 while (**qptr && **qptr != ' ')
150 if (li->lex_len >= 1 && li->lex_buf[0] == li->escape_char)
152 if (compare_term (li, "and", 1))
154 if (compare_term (li, "or", 1))
156 if (compare_term (li, "not", 1))
158 if (compare_term (li, "attr", 1))
160 if (compare_term (li, "set", 1))
162 if (compare_term (li, "attrset", 1))
164 if (compare_term (li, "prox", 1))
166 if (compare_term (li, "term", 1))
172 static int lex (struct lex_info *li)
174 return li->query_look = query_token (li);
177 static Z_AttributesPlusTerm *rpn_term (struct lex_info *li, ODR o,
179 int num_attr, int *attr_list,
182 Z_AttributesPlusTerm *zapt;
186 zapt = (Z_AttributesPlusTerm *)odr_malloc (o, sizeof(*zapt));
187 term_octet = (Odr_oct *)odr_malloc (o, sizeof(*term_octet));
188 term = (Z_Term *)odr_malloc (o, sizeof(*term));
190 zapt->num_attributes = num_attr;
196 zapt->attributeList = (Z_AttributeElement**)odr_malloc (o, num_attr *
197 sizeof(*zapt->attributeList));
199 attr_tmp = (int *)odr_malloc (o, num_attr * 2 * sizeof(int));
200 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
201 for (i = 0; i < num_attr; i++)
203 zapt->attributeList[i] =
204 (Z_AttributeElement*)odr_malloc (o,sizeof(**zapt->attributeList));
205 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
207 if (attr_set[i] == VAL_NONE)
208 zapt->attributeList[i]->attributeSet = 0;
214 attrid.proto = PROTO_Z3950;
215 attrid.oclass = CLASS_ATTSET;
216 attrid.value = attr_set[i];
218 zapt->attributeList[i]->attributeSet =
219 odr_oiddup (o, oid_ent_to_oid (&attrid, oid));
221 zapt->attributeList[i]->which = Z_AttributeValue_numeric;
222 zapt->attributeList[i]->value.numeric = &attr_tmp[2*i+1];
224 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
229 zapt->attributeList = (Z_AttributeElement**)odr_nullval();
231 term->which = Z_Term_general;
232 term->u.general = term_octet;
233 term_octet->buf = (unsigned char *)odr_malloc (o, li->lex_len);
234 term_octet->size = term_octet->len = li->lex_len;
235 memcpy (term_octet->buf, li->lex_buf, li->lex_len);
239 static Z_Operand *rpn_simple (struct lex_info *li, ODR o, oid_proto proto,
240 int num_attr, int *attr_list,
245 zo = (Z_Operand *)odr_malloc (o, sizeof(*zo));
246 switch (li->query_look)
249 zo->which = Z_Operand_APT;
250 if (!(zo->u.attributesPlusTerm =
251 rpn_term (li, o, proto, num_attr, attr_list, attr_set)))
259 zo->which = Z_Operand_resultSetId;
260 zo->u.resultSetId = (char *)odr_malloc (o, li->lex_len+1);
261 memcpy (zo->u.resultSetId, li->lex_buf, li->lex_len);
262 zo->u.resultSetId[li->lex_len] = '\0';
271 static Z_ProximityOperator *rpn_proximity (struct lex_info *li, ODR o)
273 Z_ProximityOperator *p = (Z_ProximityOperator *)odr_malloc (o, sizeof(*p));
277 if (*li->lex_buf == '1')
279 p->exclusion = (int *)odr_malloc (o, sizeof(*p->exclusion));
282 else if (*li->lex_buf == '0')
284 p->exclusion = (int *)odr_malloc (o, sizeof(*p->exclusion));
292 p->distance = (int *)odr_malloc (o, sizeof(*p->distance));
293 *p->distance = atoi (li->lex_buf);
297 p->ordered = (int *)odr_malloc (o, sizeof(*p->ordered));
298 *p->ordered = atoi (li->lex_buf);
302 p->relationType = (int *)odr_malloc (o, sizeof(*p->relationType));
303 *p->relationType = atoi (li->lex_buf);
307 if (*li->lex_buf == 'k')
309 else if (*li->lex_buf == 'p')
312 p->which = atoi (li->lex_buf);
316 p->proximityUnitCode = (int *)odr_malloc (o, sizeof(*p->proximityUnitCode));
317 *p->proximityUnitCode = atoi (li->lex_buf);
322 static Z_Complex *rpn_complex (struct lex_info *li, ODR o, oid_proto proto,
323 int num_attr, int max_attr,
324 int *attr_list, oid_value *attr_set)
329 zc = (Z_Complex *)odr_malloc (o, sizeof(*zc));
330 zo = (Z_Operator *)odr_malloc (o, sizeof(*zo));
332 switch (li->query_look)
335 zo->which = Z_Operator_and;
336 zo->u.and = odr_nullval();
339 zo->which = Z_Operator_or;
340 zo->u.and = odr_nullval();
343 zo->which = Z_Operator_and_not;
344 zo->u.and = odr_nullval();
347 zo->which = Z_Operator_prox;
348 zo->u.prox = rpn_proximity (li, o);
357 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
361 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
367 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o,
369 int num_attr, int max_attr,
370 int *attr_list, oid_value *attr_set)
375 sz = (Z_RPNStructure *)odr_malloc (o, sizeof(*sz));
376 switch (li->query_look)
382 sz->which = Z_RPNStructure_complex;
383 if (!(sz->u.complex =
384 rpn_complex (li, o, proto, num_attr, max_attr, attr_list,
390 sz->which = Z_RPNStructure_simple;
392 rpn_simple (li, o, proto, num_attr, attr_list,
400 if (num_attr >= max_attr)
402 if (!(cp = strchr (li->lex_buf, '=')) ||
403 (size_t) (cp-li->lex_buf) > li->lex_len)
405 attr_set[num_attr] = query_oid_getvalbyname (li);
408 if (!(cp = strchr (li->lex_buf, '=')))
414 attr_set[num_attr] = attr_set[num_attr-1];
416 attr_set[num_attr] = VAL_NONE;
418 attr_list[2*num_attr] = atoi (li->lex_buf);
419 attr_list[2*num_attr+1] = atoi (cp+1);
423 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
429 if (compare_term (li, "general", 0))
430 li->term_type = Z_Term_general;
431 else if (compare_term (li, "numeric", 0))
432 li->term_type = Z_Term_numeric;
433 else if (compare_term (li, "string", 0))
434 li->term_type = Z_Term_characterString;
435 else if (compare_term (li, "oid", 0))
436 li->term_type = Z_Term_oid;
437 else if (compare_term (li, "datetime", 0))
438 li->term_type = Z_Term_dateTime;
439 else if (compare_term (li, "null", 0))
440 li->term_type = Z_Term_null;
443 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
445 case 0: /* operator/operand expected! */
451 Z_RPNQuery *p_query_rpn_mk (ODR o, struct lex_info *li, oid_proto proto,
455 int attr_array[1024];
456 oid_value attr_set[512];
457 oid_value topSet = VAL_NONE;
461 zq = (Z_RPNQuery *)odr_malloc (o, sizeof(*zq));
463 if (li->query_look == 'r')
466 topSet = query_oid_getvalbyname (li);
467 if (topSet == VAL_NONE)
472 if (topSet == VAL_NONE)
473 topSet = p_query_dfset;
474 if (topSet == VAL_NONE)
477 oset.oclass = CLASS_ATTSET;
480 zq->attributeSetId = odr_oiddup (o, oid_ent_to_oid (&oset, oid));
482 if (!(zq->RPNStructure = rpn_structure (li, o, proto, 0, 512,
483 attr_array, attr_set)))
488 Z_RPNQuery *p_query_rpn (ODR o, oid_proto proto,
494 li.right_sep = "}\"";
495 li.escape_char = '@';
496 li.term_type = Z_Term_general;
498 return p_query_rpn_mk (o, &li, proto, qbuf);
501 Z_AttributesPlusTerm *p_query_scan_mk (struct lex_info *li,
502 ODR o, oid_proto proto,
503 Odr_oid **attributeSetP,
507 oid_value attr_set[512];
511 oid_value topSet = VAL_NONE;
516 if (li->query_look == 'r')
519 topSet = query_oid_getvalbyname (li);
523 if (topSet == VAL_NONE)
524 topSet = p_query_dfset;
525 if (topSet == VAL_NONE)
528 oset.oclass = CLASS_ATTSET;
531 *attributeSetP = odr_oiddup (o, oid_ent_to_oid (&oset, oid));
533 while (li->query_look == 'l')
538 if (num_attr >= max_attr)
541 if (!(cp = strchr (li->lex_buf, '=')) ||
542 (size_t) (cp-li->lex_buf) > li->lex_len)
544 attr_set[num_attr] = query_oid_getvalbyname (li);
547 if (!(cp = strchr (li->lex_buf, '=')))
553 attr_set[num_attr] = attr_set[num_attr-1];
555 attr_set[num_attr] = VAL_NONE;
557 attr_list[2*num_attr] = atoi (li->lex_buf);
558 attr_list[2*num_attr+1] = atoi (cp+1);
564 return rpn_term (li, o, proto, num_attr, attr_list, attr_set);
567 Z_AttributesPlusTerm *p_query_scan (ODR o, oid_proto proto,
568 Odr_oid **attributeSetP,
574 li.right_sep = "}\"";
575 li.escape_char = '@';
576 li.term_type = Z_Term_general;
579 return p_query_scan_mk (&li, o, proto, attributeSetP, qbuf);
582 int p_query_attset (const char *arg)
584 p_query_dfset = oid_getvalbyname (arg);
585 return (p_query_dfset == VAL_NONE) ? -1 : 0;