2 * Copyright (c) 1995, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.4 1995-06-15 07:45:19 quinn
10 * Revision 1.3 1995/06/14 11:06:35 adam
11 * Bug fix: Attributes wasn't interpreted correctly!
13 * Revision 1.2 1995/05/26 08:56:11 adam
14 * New function: p_query_scan.
16 * Revision 1.1 1995/05/22 15:31:49 adam
17 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
30 static const char *query_buf;
31 static const char *query_lex_buf;
32 static int query_lex_len;
33 static int query_look = 0;
34 static char *left_sep = "{\"";
35 static char *right_sep = "}\"";
36 static int escape_char = '@';
38 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
41 static int query_token (const char **qptr, const char **lex_buf, int *lex_len)
43 const char *sep_match;
50 if ((sep_match = strchr (left_sep, **qptr)))
52 int sep_index = sep_match - left_sep;
56 while (**qptr && **qptr != right_sep[sep_index])
67 while (**qptr && **qptr != ' ')
73 if (*lex_len >= 1 && (*lex_buf)[0] == escape_char)
75 if (*lex_len == 4 && !memcmp (*lex_buf+1, "and", 3))
77 if (*lex_len == 3 && !memcmp (*lex_buf+1, "or", 2))
79 if (*lex_len == 4 && !memcmp (*lex_buf+1, "not", 3))
81 if (*lex_len == 5 && !memcmp (*lex_buf+1, "attr", 4))
83 if (*lex_len == 4 && !memcmp (*lex_buf+1, "set", 3))
92 query_token (&query_buf, &query_lex_buf, &query_lex_len);
95 static Z_AttributesPlusTerm *rpn_term (ODR o, int num_attr, int *attr_list)
97 Z_AttributesPlusTerm *zapt;
101 zapt = odr_malloc (o, sizeof(*zapt));
102 term_octet = odr_malloc (o, sizeof(*term_octet));
103 term = odr_malloc (o, sizeof(*term));
105 zapt->num_attributes = num_attr;
111 zapt->attributeList = odr_malloc (o, num_attr *
112 sizeof(*zapt->attributeList));
114 attr_tmp = odr_malloc (o, num_attr * 2 * sizeof(int));
115 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
116 for (i = 0; i < num_attr; i++)
118 zapt->attributeList[i] =
119 odr_malloc (o,sizeof(**zapt->attributeList));
120 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
122 zapt->attributeList[i]->which = Z_AttributeValue_numeric;
123 zapt->attributeList[i]->value = &attr_tmp[2*i+1];
125 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
130 zapt->attributeList = ODR_NULLVAL;
132 term->which = Z_Term_general;
133 term->u.general = term_octet;
134 term_octet->buf = odr_malloc (o, query_lex_len);
135 term_octet->size = term_octet->len = query_lex_len;
136 memcpy (term_octet->buf, query_lex_buf, query_lex_len);
140 static Z_Operand *rpn_simple (ODR o, int num_attr, int *attr_list)
144 zo = odr_malloc (o, sizeof(*zo));
148 zo->which = Z_Operand_APT;
149 if (!(zo->u.attributesPlusTerm = rpn_term (o, num_attr, attr_list)))
157 zo->which = Z_Operand_resultSetId;
158 zo->u.resultSetId = odr_malloc (o, query_lex_len+1);
159 memcpy (zo->u.resultSetId, query_lex_buf, query_lex_len);
160 zo->u.resultSetId[query_lex_len] = '\0';
169 static Z_Complex *rpn_complex (ODR o, int num_attr, int max_attr,
175 zc = odr_malloc (o, sizeof(*zc));
176 zo = odr_malloc (o, sizeof(*zo));
181 zo->which = Z_Operator_and;
182 zo->u.and = ODR_NULLVAL;
185 zo->which = Z_Operator_or;
186 zo->u.and = ODR_NULLVAL;
189 zo->which = Z_Operator_and_not;
190 zo->u.and = ODR_NULLVAL;
196 if (!(zc->s1 = rpn_structure (o, num_attr, max_attr, attr_list)))
198 if (!(zc->s2 = rpn_structure (o, num_attr, max_attr, attr_list)))
203 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
209 sz = odr_malloc (o, sizeof(*sz));
215 sz->which = Z_RPNStructure_complex;
216 if (!(sz->u.complex = rpn_complex (o, num_attr, max_attr, attr_list)))
221 sz->which = Z_RPNStructure_simple;
222 if (!(sz->u.simple = rpn_simple (o, num_attr, attr_list)))
229 if (!(cp = strchr (query_lex_buf, '=')))
231 if (num_attr >= max_attr)
233 attr_list[2*num_attr] = atoi (query_lex_buf);
234 attr_list[2*num_attr+1] = atoi (cp+1);
237 return rpn_structure (o, num_attr, max_attr, attr_list);
238 case 0: /* operator/operand expected! */
244 Z_RPNQuery *p_query_rpn (ODR o, const char *qbuf)
247 int attr_array[1024];
250 zq = odr_malloc (o, sizeof(*zq));
251 zq->attributeSetId = NULL;
253 if (!(zq->RPNStructure = rpn_structure (o, 0, 512, attr_array)))
258 Z_AttributesPlusTerm *p_query_scan (ODR o, const char *qbuf)
271 if (!(cp = strchr (query_lex_buf, '=')))
273 if (num_attr >= max_attr)
275 attr_list[2*num_attr] = atoi (query_lex_buf);
276 attr_list[2*num_attr+1] = atoi (cp+1);
281 return rpn_term (o, num_attr, attr_list);