2 * Copyright (c) 1995, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.6 1995-09-27 15:03:03 quinn
8 * Modified function heads & prototypes.
10 * Revision 1.5 1995/06/15 12:31:02 quinn
11 * *** empty log message ***
13 * Revision 1.4 1995/06/15 07:45:19 quinn
16 * Revision 1.3 1995/06/14 11:06:35 adam
17 * Bug fix: Attributes wasn't interpreted correctly!
19 * Revision 1.2 1995/05/26 08:56:11 adam
20 * New function: p_query_scan.
22 * Revision 1.1 1995/05/22 15:31:49 adam
23 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
36 static const char *query_buf;
37 static const char *query_lex_buf;
38 static int query_lex_len;
39 static int query_look = 0;
40 static char *left_sep = "{\"";
41 static char *right_sep = "}\"";
42 static int escape_char = '@';
44 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
47 static int query_token (const char **qptr, const char **lex_buf, int *lex_len)
49 const char *sep_match;
56 if ((sep_match = strchr (left_sep, **qptr)))
58 int sep_index = sep_match - left_sep;
62 while (**qptr && **qptr != right_sep[sep_index])
73 while (**qptr && **qptr != ' ')
79 if (*lex_len >= 1 && (*lex_buf)[0] == escape_char)
81 if (*lex_len == 4 && !memcmp (*lex_buf+1, "and", 3))
83 if (*lex_len == 3 && !memcmp (*lex_buf+1, "or", 2))
85 if (*lex_len == 4 && !memcmp (*lex_buf+1, "not", 3))
87 if (*lex_len == 5 && !memcmp (*lex_buf+1, "attr", 4))
89 if (*lex_len == 4 && !memcmp (*lex_buf+1, "set", 3))
98 query_token (&query_buf, &query_lex_buf, &query_lex_len);
101 static Z_AttributesPlusTerm *rpn_term (ODR o, int num_attr, int *attr_list)
103 Z_AttributesPlusTerm *zapt;
107 zapt = odr_malloc (o, sizeof(*zapt));
108 term_octet = odr_malloc (o, sizeof(*term_octet));
109 term = odr_malloc (o, sizeof(*term));
111 zapt->num_attributes = num_attr;
117 zapt->attributeList = odr_malloc (o, num_attr *
118 sizeof(*zapt->attributeList));
120 attr_tmp = odr_malloc (o, num_attr * 2 * sizeof(int));
121 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
122 for (i = 0; i < num_attr; i++)
124 zapt->attributeList[i] =
125 odr_malloc (o,sizeof(**zapt->attributeList));
126 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
128 zapt->attributeList[i]->attributeSet = 0;
129 zapt->attributeList[i]->which = Z_AttributeValue_numeric;
130 zapt->attributeList[i]->value.numeric = &attr_tmp[2*i+1];
132 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
137 zapt->attributeList = ODR_NULLVAL;
139 term->which = Z_Term_general;
140 term->u.general = term_octet;
141 term_octet->buf = odr_malloc (o, query_lex_len);
142 term_octet->size = term_octet->len = query_lex_len;
143 memcpy (term_octet->buf, query_lex_buf, query_lex_len);
147 static Z_Operand *rpn_simple (ODR o, int num_attr, int *attr_list)
151 zo = odr_malloc (o, sizeof(*zo));
155 zo->which = Z_Operand_APT;
156 if (!(zo->u.attributesPlusTerm = rpn_term (o, num_attr, attr_list)))
164 zo->which = Z_Operand_resultSetId;
165 zo->u.resultSetId = odr_malloc (o, query_lex_len+1);
166 memcpy (zo->u.resultSetId, query_lex_buf, query_lex_len);
167 zo->u.resultSetId[query_lex_len] = '\0';
176 static Z_Complex *rpn_complex (ODR o, int num_attr, int max_attr,
182 zc = odr_malloc (o, sizeof(*zc));
183 zo = odr_malloc (o, sizeof(*zo));
188 zo->which = Z_Operator_and;
189 zo->u.and = ODR_NULLVAL;
192 zo->which = Z_Operator_or;
193 zo->u.and = ODR_NULLVAL;
196 zo->which = Z_Operator_and_not;
197 zo->u.and = ODR_NULLVAL;
203 if (!(zc->s1 = rpn_structure (o, num_attr, max_attr, attr_list)))
205 if (!(zc->s2 = rpn_structure (o, num_attr, max_attr, attr_list)))
210 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
216 sz = odr_malloc (o, sizeof(*sz));
222 sz->which = Z_RPNStructure_complex;
223 if (!(sz->u.complex = rpn_complex (o, num_attr, max_attr, attr_list)))
228 sz->which = Z_RPNStructure_simple;
229 if (!(sz->u.simple = rpn_simple (o, num_attr, attr_list)))
236 if (!(cp = strchr (query_lex_buf, '=')))
238 if (num_attr >= max_attr)
240 attr_list[2*num_attr] = atoi (query_lex_buf);
241 attr_list[2*num_attr+1] = atoi (cp+1);
244 return rpn_structure (o, num_attr, max_attr, attr_list);
245 case 0: /* operator/operand expected! */
251 Z_RPNQuery MDF *p_query_rpn (ODR o, const char *qbuf)
254 int attr_array[1024];
257 zq = odr_malloc (o, sizeof(*zq));
258 zq->attributeSetId = NULL;
260 if (!(zq->RPNStructure = rpn_structure (o, 0, 512, attr_array)))
265 Z_AttributesPlusTerm MDF *p_query_scan (ODR o, const char *qbuf)
278 if (!(cp = strchr (query_lex_buf, '=')))
280 if (num_attr >= max_attr)
282 attr_list[2*num_attr] = atoi (query_lex_buf);
283 attr_list[2*num_attr+1] = atoi (cp+1);
288 return rpn_term (o, num_attr, attr_list);