2 * Copyright (c) 1995-1997, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.17 1997-11-24 11:33:57 adam
8 * Using function odr_nullval() instead of global ODR_NULLVAL when
11 * Revision 1.16 1997/09/29 13:19:00 adam
12 * Added function, oid_ent_to_oid, to replace the function
13 * oid_getoidbyent, which is not thread safe.
15 * Revision 1.15 1997/09/29 07:13:43 adam
16 * Changed type of a few variables to avoid warnings.
18 * Revision 1.14 1997/09/22 12:33:41 adam
19 * Fixed bug introduced by previous commit.
21 * Revision 1.13 1997/09/17 12:10:42 adam
24 * Revision 1.12 1997/09/01 08:54:13 adam
25 * New windows NT/95 port using MSV5.0. Made prefix query handling
26 * thread safe. The function options ignores empty arguments when met.
28 * Revision 1.11 1996/11/11 13:15:29 adam
29 * Added proximity operator.
31 * Revision 1.10 1996/08/12 14:10:35 adam
32 * New function p_query_attset to define default attribute set.
34 * Revision 1.9 1996/03/15 11:03:46 adam
35 * Attribute set can be set globally for a query with the @attrset
36 * operator. The @attr operator has an optional attribute-set specifier
37 * that sets the attribute set locally.
39 * Revision 1.8 1996/01/02 11:46:56 quinn
40 * Changed 'operator' to 'roperator' to avoid C++ conflict.
42 * Revision 1.7 1995/09/29 17:12:36 quinn
45 * Revision 1.6 1995/09/27 15:03:03 quinn
46 * Modified function heads & prototypes.
48 * Revision 1.5 1995/06/15 12:31:02 quinn
49 * *** empty log message ***
51 * Revision 1.4 1995/06/15 07:45:19 quinn
54 * Revision 1.3 1995/06/14 11:06:35 adam
55 * Bug fix: Attributes wasn't interpreted correctly!
57 * Revision 1.2 1995/05/26 08:56:11 adam
58 * New function: p_query_scan.
60 * Revision 1.1 1995/05/22 15:31:49 adam
61 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
74 static oid_value p_query_dfset = VAL_NONE;
77 const char *query_buf;
87 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o, oid_proto,
88 int num_attr, int max_attr,
89 int *attr_list, oid_value *attr_set);
91 static int query_oid_getvalbyname (struct lex_info *li)
97 memcpy (buf, li->lex_buf, li->lex_len);
98 buf[li->lex_len] = '\0';
99 return oid_getvalbyname (buf);
102 static int compare_term (struct lex_info *li, const char *src, size_t off)
104 size_t len=strlen(src);
106 if (li->lex_len == len+off && !memcmp (li->lex_buf+off, src, len-off))
111 static int query_token (struct lex_info *li)
113 const char *sep_match;
114 const char **qptr = &li->query_buf;
116 while (**qptr == ' ')
121 if ((sep_match = strchr (li->left_sep, **qptr)))
123 int sep_index = sep_match - li->left_sep;
127 while (**qptr && **qptr != li->right_sep[sep_index])
138 while (**qptr && **qptr != ' ')
144 if (li->lex_len >= 1 && li->lex_buf[0] == li->escape_char)
146 if (compare_term (li, "and", 1))
148 if (compare_term (li, "or", 1))
150 if (compare_term (li, "not", 1))
152 if (compare_term (li, "attr", 1))
154 if (compare_term (li, "set", 1))
156 if (compare_term (li, "attrset", 1))
158 if (compare_term (li, "prox", 1))
160 if (compare_term (li, "term", 1))
166 static int lex (struct lex_info *li)
168 return li->query_look = query_token (li);
171 static Z_AttributesPlusTerm *rpn_term (struct lex_info *li, ODR o,
173 int num_attr, int *attr_list,
176 Z_AttributesPlusTerm *zapt;
180 zapt = odr_malloc (o, sizeof(*zapt));
181 term_octet = odr_malloc (o, sizeof(*term_octet));
182 term = odr_malloc (o, sizeof(*term));
184 zapt->num_attributes = num_attr;
190 zapt->attributeList = odr_malloc (o, num_attr *
191 sizeof(*zapt->attributeList));
193 attr_tmp = odr_malloc (o, num_attr * 2 * sizeof(int));
194 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
195 for (i = 0; i < num_attr; i++)
197 zapt->attributeList[i] =
198 odr_malloc (o,sizeof(**zapt->attributeList));
199 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
201 if (attr_set[i] == VAL_NONE)
202 zapt->attributeList[i]->attributeSet = 0;
208 attrid.proto = PROTO_Z3950;
209 attrid.oclass = CLASS_ATTSET;
210 attrid.value = attr_set[i];
212 zapt->attributeList[i]->attributeSet =
213 odr_oiddup (o, oid_ent_to_oid (&attrid, oid));
215 zapt->attributeList[i]->which = Z_AttributeValue_numeric;
216 zapt->attributeList[i]->value.numeric = &attr_tmp[2*i+1];
218 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
223 zapt->attributeList = odr_nullval();
225 term->which = Z_Term_general;
226 term->u.general = term_octet;
227 term_octet->buf = odr_malloc (o, li->lex_len);
228 term_octet->size = term_octet->len = li->lex_len;
229 memcpy (term_octet->buf, li->lex_buf, li->lex_len);
233 static Z_Operand *rpn_simple (struct lex_info *li, ODR o, oid_proto proto,
234 int num_attr, int *attr_list,
239 zo = odr_malloc (o, sizeof(*zo));
240 switch (li->query_look)
243 zo->which = Z_Operand_APT;
244 if (!(zo->u.attributesPlusTerm =
245 rpn_term (li, o, proto, num_attr, attr_list, attr_set)))
253 zo->which = Z_Operand_resultSetId;
254 zo->u.resultSetId = odr_malloc (o, li->lex_len+1);
255 memcpy (zo->u.resultSetId, li->lex_buf, li->lex_len);
256 zo->u.resultSetId[li->lex_len] = '\0';
265 static Z_ProximityOperator *rpn_proximity (struct lex_info *li, ODR o)
267 Z_ProximityOperator *p = odr_malloc (o, sizeof(*p));
271 if (*li->lex_buf == '1')
273 p->exclusion = odr_malloc (o, sizeof(*p->exclusion));
276 else if (*li->lex_buf == '0')
278 p->exclusion = odr_malloc (o, sizeof(*p->exclusion));
286 p->distance = odr_malloc (o, sizeof(*p->distance));
287 *p->distance = atoi (li->lex_buf);
291 p->ordered = odr_malloc (o, sizeof(*p->ordered));
292 *p->ordered = atoi (li->lex_buf);
296 p->relationType = odr_malloc (o, sizeof(*p->relationType));
297 *p->relationType = atoi (li->lex_buf);
301 if (*li->lex_buf == 'k')
303 else if (*li->lex_buf == 'p')
306 p->which = atoi (li->lex_buf);
310 p->proximityUnitCode = odr_malloc (o, sizeof(*p->proximityUnitCode));
311 *p->proximityUnitCode = atoi (li->lex_buf);
316 static Z_Complex *rpn_complex (struct lex_info *li, ODR o, oid_proto proto,
317 int num_attr, int max_attr,
318 int *attr_list, oid_value *attr_set)
323 zc = odr_malloc (o, sizeof(*zc));
324 zo = odr_malloc (o, sizeof(*zo));
326 switch (li->query_look)
329 zo->which = Z_Operator_and;
330 zo->u.and = odr_nullval();
333 zo->which = Z_Operator_or;
334 zo->u.and = odr_nullval();
337 zo->which = Z_Operator_and_not;
338 zo->u.and = odr_nullval();
341 zo->which = Z_Operator_prox;
342 zo->u.prox = rpn_proximity (li, o);
351 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
355 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
361 static Z_RPNStructure *rpn_structure (struct lex_info *li, ODR o,
363 int num_attr, int max_attr,
364 int *attr_list, oid_value *attr_set)
369 sz = odr_malloc (o, sizeof(*sz));
370 switch (li->query_look)
376 sz->which = Z_RPNStructure_complex;
377 if (!(sz->u.complex =
378 rpn_complex (li, o, proto, num_attr, max_attr, attr_list,
384 sz->which = Z_RPNStructure_simple;
386 rpn_simple (li, o, proto, num_attr, attr_list,
394 if (num_attr >= max_attr)
396 if (!(cp = strchr (li->lex_buf, '=')) ||
397 (size_t) (cp-li->lex_buf) > li->lex_len)
399 attr_set[num_attr] = query_oid_getvalbyname (li);
402 if (!(cp = strchr (li->lex_buf, '=')))
408 attr_set[num_attr] = attr_set[num_attr-1];
410 attr_set[num_attr] = VAL_NONE;
412 attr_list[2*num_attr] = atoi (li->lex_buf);
413 attr_list[2*num_attr+1] = atoi (cp+1);
417 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
423 if (compare_term (li, "general", 0))
424 li->term_type = Z_Term_general;
425 else if (compare_term (li, "numeric", 0))
426 li->term_type = Z_Term_numeric;
427 else if (compare_term (li, "string", 0))
428 li->term_type = Z_Term_characterString;
429 else if (compare_term (li, "oid", 0))
430 li->term_type = Z_Term_oid;
431 else if (compare_term (li, "datetime", 0))
432 li->term_type = Z_Term_dateTime;
433 else if (compare_term (li, "null", 0))
434 li->term_type = Z_Term_null;
437 rpn_structure (li, o, proto, num_attr, max_attr, attr_list,
439 case 0: /* operator/operand expected! */
445 Z_RPNQuery *p_query_rpn_mk (ODR o, struct lex_info *li, oid_proto proto,
449 int attr_array[1024];
450 oid_value attr_set[512];
451 oid_value topSet = VAL_NONE;
455 zq = odr_malloc (o, sizeof(*zq));
457 if (li->query_look == 'r')
460 topSet = query_oid_getvalbyname (li);
461 if (topSet == VAL_NONE)
466 if (topSet == VAL_NONE)
467 topSet = p_query_dfset;
468 if (topSet == VAL_NONE)
471 oset.oclass = CLASS_ATTSET;
474 zq->attributeSetId = odr_oiddup (o, oid_ent_to_oid (&oset, oid));
476 if (!(zq->RPNStructure = rpn_structure (li, o, proto, 0, 512,
477 attr_array, attr_set)))
482 Z_RPNQuery *p_query_rpn (ODR o, oid_proto proto,
488 li.right_sep = "}\"";
489 li.escape_char = '@';
490 li.term_type = Z_Term_general;
492 return p_query_rpn_mk (o, &li, proto, qbuf);
495 Z_AttributesPlusTerm *p_query_scan_mk (struct lex_info *li,
496 ODR o, oid_proto proto,
497 Odr_oid **attributeSetP,
501 oid_value attr_set[512];
505 oid_value topSet = VAL_NONE;
510 if (li->query_look == 'r')
513 topSet = query_oid_getvalbyname (li);
517 if (topSet == VAL_NONE)
518 topSet = p_query_dfset;
519 if (topSet == VAL_NONE)
522 oset.oclass = CLASS_ATTSET;
525 *attributeSetP = odr_oiddup (o, oid_ent_to_oid (&oset, oid));
527 while (li->query_look == 'l')
532 if (num_attr >= max_attr)
535 if (!(cp = strchr (li->lex_buf, '=')) ||
536 (size_t) (cp-li->lex_buf) > li->lex_len)
538 attr_set[num_attr] = query_oid_getvalbyname (li);
541 if (!(cp = strchr (li->lex_buf, '=')))
547 attr_set[num_attr] = attr_set[num_attr-1];
549 attr_set[num_attr] = VAL_NONE;
551 attr_list[2*num_attr] = atoi (li->lex_buf);
552 attr_list[2*num_attr+1] = atoi (cp+1);
558 return rpn_term (li, o, proto, num_attr, attr_list, attr_set);
561 Z_AttributesPlusTerm *p_query_scan (ODR o, oid_proto proto,
562 Odr_oid **attributeSetP,
568 li.right_sep = "}\"";
569 li.escape_char = '@';
570 li.term_type = Z_Term_general;
573 return p_query_scan_mk (&li, o, proto, attributeSetP, qbuf);
576 int p_query_attset (const char *arg)
578 p_query_dfset = oid_getvalbyname (arg);
579 return (p_query_dfset == VAL_NONE) ? -1 : 0;