2 * Copyright (c) 1995, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.7 1995-09-29 17:12:36 quinn
10 * Revision 1.6 1995/09/27 15:03:03 quinn
11 * Modified function heads & prototypes.
13 * Revision 1.5 1995/06/15 12:31:02 quinn
14 * *** empty log message ***
16 * Revision 1.4 1995/06/15 07:45:19 quinn
19 * Revision 1.3 1995/06/14 11:06:35 adam
20 * Bug fix: Attributes wasn't interpreted correctly!
22 * Revision 1.2 1995/05/26 08:56:11 adam
23 * New function: p_query_scan.
25 * Revision 1.1 1995/05/22 15:31:49 adam
26 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
39 static const char *query_buf;
40 static const char *query_lex_buf;
41 static int query_lex_len;
42 static int query_look = 0;
43 static char *left_sep = "{\"";
44 static char *right_sep = "}\"";
45 static int escape_char = '@';
47 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
50 static int query_token (const char **qptr, const char **lex_buf, int *lex_len)
52 const char *sep_match;
59 if ((sep_match = strchr (left_sep, **qptr)))
61 int sep_index = sep_match - left_sep;
65 while (**qptr && **qptr != right_sep[sep_index])
76 while (**qptr && **qptr != ' ')
82 if (*lex_len >= 1 && (*lex_buf)[0] == escape_char)
84 if (*lex_len == 4 && !memcmp (*lex_buf+1, "and", 3))
86 if (*lex_len == 3 && !memcmp (*lex_buf+1, "or", 2))
88 if (*lex_len == 4 && !memcmp (*lex_buf+1, "not", 3))
90 if (*lex_len == 5 && !memcmp (*lex_buf+1, "attr", 4))
92 if (*lex_len == 4 && !memcmp (*lex_buf+1, "set", 3))
101 query_token (&query_buf, &query_lex_buf, &query_lex_len);
104 static Z_AttributesPlusTerm *rpn_term (ODR o, int num_attr, int *attr_list)
106 Z_AttributesPlusTerm *zapt;
110 zapt = odr_malloc (o, sizeof(*zapt));
111 term_octet = odr_malloc (o, sizeof(*term_octet));
112 term = odr_malloc (o, sizeof(*term));
114 zapt->num_attributes = num_attr;
120 zapt->attributeList = odr_malloc (o, num_attr *
121 sizeof(*zapt->attributeList));
123 attr_tmp = odr_malloc (o, num_attr * 2 * sizeof(int));
124 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
125 for (i = 0; i < num_attr; i++)
127 zapt->attributeList[i] =
128 odr_malloc (o,sizeof(**zapt->attributeList));
129 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
131 zapt->attributeList[i]->attributeSet = 0;
132 zapt->attributeList[i]->which = Z_AttributeValue_numeric;
133 zapt->attributeList[i]->value.numeric = &attr_tmp[2*i+1];
135 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
140 zapt->attributeList = ODR_NULLVAL;
142 term->which = Z_Term_general;
143 term->u.general = term_octet;
144 term_octet->buf = odr_malloc (o, query_lex_len);
145 term_octet->size = term_octet->len = query_lex_len;
146 memcpy (term_octet->buf, query_lex_buf, query_lex_len);
150 static Z_Operand *rpn_simple (ODR o, int num_attr, int *attr_list)
154 zo = odr_malloc (o, sizeof(*zo));
158 zo->which = Z_Operand_APT;
159 if (!(zo->u.attributesPlusTerm = rpn_term (o, num_attr, attr_list)))
167 zo->which = Z_Operand_resultSetId;
168 zo->u.resultSetId = odr_malloc (o, query_lex_len+1);
169 memcpy (zo->u.resultSetId, query_lex_buf, query_lex_len);
170 zo->u.resultSetId[query_lex_len] = '\0';
179 static Z_Complex *rpn_complex (ODR o, int num_attr, int max_attr,
185 zc = odr_malloc (o, sizeof(*zc));
186 zo = odr_malloc (o, sizeof(*zo));
191 zo->which = Z_Operator_and;
192 zo->u.and = ODR_NULLVAL;
195 zo->which = Z_Operator_or;
196 zo->u.and = ODR_NULLVAL;
199 zo->which = Z_Operator_and_not;
200 zo->u.and = ODR_NULLVAL;
206 if (!(zc->s1 = rpn_structure (o, num_attr, max_attr, attr_list)))
208 if (!(zc->s2 = rpn_structure (o, num_attr, max_attr, attr_list)))
213 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
219 sz = odr_malloc (o, sizeof(*sz));
225 sz->which = Z_RPNStructure_complex;
226 if (!(sz->u.complex = rpn_complex (o, num_attr, max_attr, attr_list)))
231 sz->which = Z_RPNStructure_simple;
232 if (!(sz->u.simple = rpn_simple (o, num_attr, attr_list)))
239 if (!(cp = strchr (query_lex_buf, '=')))
241 if (num_attr >= max_attr)
243 attr_list[2*num_attr] = atoi (query_lex_buf);
244 attr_list[2*num_attr+1] = atoi (cp+1);
247 return rpn_structure (o, num_attr, max_attr, attr_list);
248 case 0: /* operator/operand expected! */
254 Z_RPNQuery *p_query_rpn (ODR o, const char *qbuf)
257 int attr_array[1024];
260 zq = odr_malloc (o, sizeof(*zq));
261 zq->attributeSetId = NULL;
263 if (!(zq->RPNStructure = rpn_structure (o, 0, 512, attr_array)))
268 Z_AttributesPlusTerm *p_query_scan (ODR o, const char *qbuf)
281 if (!(cp = strchr (query_lex_buf, '=')))
283 if (num_attr >= max_attr)
285 attr_list[2*num_attr] = atoi (query_lex_buf);
286 attr_list[2*num_attr+1] = atoi (cp+1);
291 return rpn_term (o, num_attr, attr_list);