2 * Copyright (c) 1995-1997, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.18 1998-02-11 11:53:36 adam
8 * Changed code so that it compiles as C++.
10 * Revision 1.17 1997/11/24 11:33:57 adam
11 * Using function odr_nullval() instead of global ODR_NULLVAL when
14 * Revision 1.16 1997/09/29 13:19:00 adam
15 * Added function, oid_ent_to_oid, to replace the function
16 * oid_getoidbyent, which is not thread safe.
18 * Revision 1.15 1997/09/29 07:13:43 adam
19 * Changed type of a few variables to avoid warnings.
21 * Revision 1.14 1997/09/22 12:33:41 adam
22 * Fixed bug introduced by previous commit.
24 * Revision 1.13 1997/09/17 12:10:42 adam
27 * Revision 1.12 1997/09/01 08:54:13 adam
28 * New windows NT/95 port using MSV5.0. Made prefix query handling
29 * thread safe. The function options ignores empty arguments when met.
31 * Revision 1.11 1996/11/11 13:15:29 adam
32 * Added proximity operator.
34 * Revision 1.10 1996/08/12 14:10:35 adam
35 * New function p_query_attset to define default attribute set.
37 * Revision 1.9 1996/03/15 11:03:46 adam
38 * Attribute set can be set globally for a query with the @attrset
39 * operator. The @attr operator has an optional attribute-set specifier
40 * that sets the attribute set locally.
42 * Revision 1.8 1996/01/02 11:46:56 quinn
43 * Changed 'operator' to 'roperator' to avoid C++ conflict.
45 * Revision 1.7 1995/09/29 17:12:36 quinn
48 * Revision 1.6 1995/09/27 15:03:03 quinn
49 * Modified function heads & prototypes.
51 * Revision 1.5 1995/06/15 12:31:02 quinn
52 * *** empty log message ***
54 * Revision 1.4 1995/06/15 07:45:19 quinn
57 * Revision 1.3 1995/06/14 11:06:35 adam
58 * Bug fix: Attributes wasn't interpreted correctly!
60 * Revision 1.2 1995/05/26 08:56:11 adam
61 * New function: p_query_scan.
63 * Revision 1.1 1995/05/22 15:31:49 adam
64 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
77 static oid_value p_query_dfset = VAL_NONE;
80 const char *query_buf;
90 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o, oid_proto,
91 int num_attr, int max_attr,
92 int *attr_list, oid_value *attr_set);
94 static int query_oid_getvalbyname (struct lex_info *li)
100 memcpy (buf, li->lex_buf, li->lex_len);
101 buf[li->lex_len] = '\0';
102 return oid_getvalbyname (buf);
105 static int compare_term (struct lex_info *li, const char *src, size_t off)
107 size_t len=strlen(src);
109 if (li->lex_len == len+off && !memcmp (li->lex_buf+off, src, len-off))
114 static int query_token (struct lex_info *li)
116 const char *sep_match;
117 const char **qptr = &li->query_buf;
119 while (**qptr == ' ')
124 if ((sep_match = strchr (li->left_sep, **qptr)))
126 int sep_index = sep_match - li->left_sep;
130 while (**qptr && **qptr != li->right_sep[sep_index])
141 while (**qptr && **qptr != ' ')
147 if (li->lex_len >= 1 && li->lex_buf[0] == li->escape_char)
149 if (compare_term (li, "and", 1))
151 if (compare_term (li, "or", 1))
153 if (compare_term (li, "not", 1))
155 if (compare_term (li, "attr", 1))
157 if (compare_term (li, "set", 1))
159 if (compare_term (li, "attrset", 1))
161 if (compare_term (li, "prox", 1))
163 if (compare_term (li, "term", 1))
169 static int lex (struct lex_info *li)
171 return li->query_look = query_token (li);
174 static Z_AttributesPlusTerm *rpn_term (struct lex_info *li, ODR o,
176 int num_attr, int *attr_list,
179 Z_AttributesPlusTerm *zapt;
183 zapt = (Z_AttributesPlusTerm *)odr_malloc (o, sizeof(*zapt));
184 term_octet = (Odr_oct *)odr_malloc (o, sizeof(*term_octet));
185 term = (Z_Term *)odr_malloc (o, sizeof(*term));
187 zapt->num_attributes = num_attr;
193 zapt->attributeList = (Z_AttributeElement**)odr_malloc (o, num_attr *
194 sizeof(*zapt->attributeList));
196 attr_tmp = (int *)odr_malloc (o, num_attr * 2 * sizeof(int));
197 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
198 for (i = 0; i < num_attr; i++)
200 zapt->attributeList[i] =
201 (Z_AttributeElement*)odr_malloc (o,sizeof(**zapt->attributeList));
202 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
204 if (attr_set[i] == VAL_NONE)
205 zapt->attributeList[i]->attributeSet = 0;
211 attrid.proto = PROTO_Z3950;
212 attrid.oclass = CLASS_ATTSET;
213 attrid.value = attr_set[i];
215 zapt->attributeList[i]->attributeSet =
216 odr_oiddup (o, oid_ent_to_oid (&attrid, oid));
218 zapt->attributeList[i]->which = Z_AttributeValue_numeric;
219 zapt->attributeList[i]->value.numeric = &attr_tmp[2*i+1];
221 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
226 zapt->attributeList = (Z_AttributeElement**)odr_nullval();
228 term->which = Z_Term_general;
229 term->u.general = term_octet;
230 term_octet->buf = (unsigned char *)odr_malloc (o, li->lex_len);
231 term_octet->size = term_octet->len = li->lex_len;
232 memcpy (term_octet->buf, li->lex_buf, li->lex_len);
236 static Z_Operand *rpn_simple (struct lex_info *li, ODR o, oid_proto proto,
237 int num_attr, int *attr_list,
242 zo = (Z_Operand *)odr_malloc (o, sizeof(*zo));
243 switch (li->query_look)
246 zo->which = Z_Operand_APT;
247 if (!(zo->u.attributesPlusTerm =
248 rpn_term (li, o, proto, num_attr, attr_list, attr_set)))
256 zo->which = Z_Operand_resultSetId;
257 zo->u.resultSetId = (char *)odr_malloc (o, li->lex_len+1);
258 memcpy (zo->u.resultSetId, li->lex_buf, li->lex_len);
259 zo->u.resultSetId[li->lex_len] = '\0';
268 static Z_ProximityOperator *rpn_proximity (struct lex_info *li, ODR o)
270 Z_ProximityOperator *p = (Z_ProximityOperator *)odr_malloc (o, sizeof(*p));
274 if (*li->lex_buf == '1')
276 p->exclusion = (int *)odr_malloc (o, sizeof(*p->exclusion));
279 else if (*li->lex_buf == '0')
281 p->exclusion = (int *)odr_malloc (o, sizeof(*p->exclusion));
289 p->distance = (int *)odr_malloc (o, sizeof(*p->distance));
290 *p->distance = atoi (li->lex_buf);
294 p->ordered = (int *)odr_malloc (o, sizeof(*p->ordered));
295 *p->ordered = atoi (li->lex_buf);
299 p->relationType = (int *)odr_malloc (o, sizeof(*p->relationType));
300 *p->relationType = atoi (li->lex_buf);
304 if (*li->lex_buf == 'k')
306 else if (*li->lex_buf == 'p')
309 p->which = atoi (li->lex_buf);
313 p->proximityUnitCode = (int *)odr_malloc (o, sizeof(*p->proximityUnitCode));
314 *p->proximityUnitCode = atoi (li->lex_buf);
319 static Z_Complex *rpn_complex (struct lex_info *li, ODR o, oid_proto proto,
320 int num_attr, int max_attr,
321 int *attr_list, oid_value *attr_set)
326 zc = (Z_Complex *)odr_malloc (o, sizeof(*zc));
327 zo = (Z_Operator *)odr_malloc (o, sizeof(*zo));
329 switch (li->query_look)
332 zo->which = Z_Operator_and;
333 zo->u.and = odr_nullval();
336 zo->which = Z_Operator_or;
337 zo->u.and = odr_nullval();
340 zo->which = Z_Operator_and_not;
341 zo->u.and = odr_nullval();
344 zo->which = Z_Operator_prox;
345 zo->u.prox = rpn_proximity (li, o);
354 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
358 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
364 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o,
366 int num_attr, int max_attr,
367 int *attr_list, oid_value *attr_set)
372 sz = (Z_RPNStructure *)odr_malloc (o, sizeof(*sz));
373 switch (li->query_look)
379 sz->which = Z_RPNStructure_complex;
380 if (!(sz->u.complex =
381 rpn_complex (li, o, proto, num_attr, max_attr, attr_list,
387 sz->which = Z_RPNStructure_simple;
389 rpn_simple (li, o, proto, num_attr, attr_list,
397 if (num_attr >= max_attr)
399 if (!(cp = strchr (li->lex_buf, '=')) ||
400 (size_t) (cp-li->lex_buf) > li->lex_len)
402 attr_set[num_attr] = query_oid_getvalbyname (li);
405 if (!(cp = strchr (li->lex_buf, '=')))
411 attr_set[num_attr] = attr_set[num_attr-1];
413 attr_set[num_attr] = VAL_NONE;
415 attr_list[2*num_attr] = atoi (li->lex_buf);
416 attr_list[2*num_attr+1] = atoi (cp+1);
420 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
426 if (compare_term (li, "general", 0))
427 li->term_type = Z_Term_general;
428 else if (compare_term (li, "numeric", 0))
429 li->term_type = Z_Term_numeric;
430 else if (compare_term (li, "string", 0))
431 li->term_type = Z_Term_characterString;
432 else if (compare_term (li, "oid", 0))
433 li->term_type = Z_Term_oid;
434 else if (compare_term (li, "datetime", 0))
435 li->term_type = Z_Term_dateTime;
436 else if (compare_term (li, "null", 0))
437 li->term_type = Z_Term_null;
440 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
442 case 0: /* operator/operand expected! */
448 Z_RPNQuery *p_query_rpn_mk (ODR o, struct lex_info *li, oid_proto proto,
452 int attr_array[1024];
453 oid_value attr_set[512];
454 oid_value topSet = VAL_NONE;
458 zq = (Z_RPNQuery *)odr_malloc (o, sizeof(*zq));
460 if (li->query_look == 'r')
463 topSet = query_oid_getvalbyname (li);
464 if (topSet == VAL_NONE)
469 if (topSet == VAL_NONE)
470 topSet = p_query_dfset;
471 if (topSet == VAL_NONE)
474 oset.oclass = CLASS_ATTSET;
477 zq->attributeSetId = odr_oiddup (o, oid_ent_to_oid (&oset, oid));
479 if (!(zq->RPNStructure = rpn_structure (li, o, proto, 0, 512,
480 attr_array, attr_set)))
485 Z_RPNQuery *p_query_rpn (ODR o, oid_proto proto,
491 li.right_sep = "}\"";
492 li.escape_char = '@';
493 li.term_type = Z_Term_general;
495 return p_query_rpn_mk (o, &li, proto, qbuf);
498 Z_AttributesPlusTerm *p_query_scan_mk (struct lex_info *li,
499 ODR o, oid_proto proto,
500 Odr_oid **attributeSetP,
504 oid_value attr_set[512];
508 oid_value topSet = VAL_NONE;
513 if (li->query_look == 'r')
516 topSet = query_oid_getvalbyname (li);
520 if (topSet == VAL_NONE)
521 topSet = p_query_dfset;
522 if (topSet == VAL_NONE)
525 oset.oclass = CLASS_ATTSET;
528 *attributeSetP = odr_oiddup (o, oid_ent_to_oid (&oset, oid));
530 while (li->query_look == 'l')
535 if (num_attr >= max_attr)
538 if (!(cp = strchr (li->lex_buf, '=')) ||
539 (size_t) (cp-li->lex_buf) > li->lex_len)
541 attr_set[num_attr] = query_oid_getvalbyname (li);
544 if (!(cp = strchr (li->lex_buf, '=')))
550 attr_set[num_attr] = attr_set[num_attr-1];
552 attr_set[num_attr] = VAL_NONE;
554 attr_list[2*num_attr] = atoi (li->lex_buf);
555 attr_list[2*num_attr+1] = atoi (cp+1);
561 return rpn_term (li, o, proto, num_attr, attr_list, attr_set);
564 Z_AttributesPlusTerm *p_query_scan (ODR o, oid_proto proto,
565 Odr_oid **attributeSetP,
571 li.right_sep = "}\"";
572 li.escape_char = '@';
573 li.term_type = Z_Term_general;
576 return p_query_scan_mk (&li, o, proto, attributeSetP, qbuf);
579 int p_query_attset (const char *arg)
581 p_query_dfset = oid_getvalbyname (arg);
582 return (p_query_dfset == VAL_NONE) ? -1 : 0;