2 * Copyright (c) 1995, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.5 1995-06-15 12:31:02 quinn
8 * *** empty log message ***
10 * Revision 1.4 1995/06/15 07:45:19 quinn
13 * Revision 1.3 1995/06/14 11:06:35 adam
14 * Bug fix: Attributes wasn't interpreted correctly!
16 * Revision 1.2 1995/05/26 08:56:11 adam
17 * New function: p_query_scan.
19 * Revision 1.1 1995/05/22 15:31:49 adam
20 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
33 static const char *query_buf;
34 static const char *query_lex_buf;
35 static int query_lex_len;
36 static int query_look = 0;
37 static char *left_sep = "{\"";
38 static char *right_sep = "}\"";
39 static int escape_char = '@';
41 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
44 static int query_token (const char **qptr, const char **lex_buf, int *lex_len)
46 const char *sep_match;
53 if ((sep_match = strchr (left_sep, **qptr)))
55 int sep_index = sep_match - left_sep;
59 while (**qptr && **qptr != right_sep[sep_index])
70 while (**qptr && **qptr != ' ')
76 if (*lex_len >= 1 && (*lex_buf)[0] == escape_char)
78 if (*lex_len == 4 && !memcmp (*lex_buf+1, "and", 3))
80 if (*lex_len == 3 && !memcmp (*lex_buf+1, "or", 2))
82 if (*lex_len == 4 && !memcmp (*lex_buf+1, "not", 3))
84 if (*lex_len == 5 && !memcmp (*lex_buf+1, "attr", 4))
86 if (*lex_len == 4 && !memcmp (*lex_buf+1, "set", 3))
95 query_token (&query_buf, &query_lex_buf, &query_lex_len);
98 static Z_AttributesPlusTerm *rpn_term (ODR o, int num_attr, int *attr_list)
100 Z_AttributesPlusTerm *zapt;
104 zapt = odr_malloc (o, sizeof(*zapt));
105 term_octet = odr_malloc (o, sizeof(*term_octet));
106 term = odr_malloc (o, sizeof(*term));
108 zapt->num_attributes = num_attr;
114 zapt->attributeList = odr_malloc (o, num_attr *
115 sizeof(*zapt->attributeList));
117 attr_tmp = odr_malloc (o, num_attr * 2 * sizeof(int));
118 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
119 for (i = 0; i < num_attr; i++)
121 zapt->attributeList[i] =
122 odr_malloc (o,sizeof(**zapt->attributeList));
123 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
125 zapt->attributeList[i]->attributeSet = 0;
126 zapt->attributeList[i]->which = Z_AttributeValue_numeric;
127 zapt->attributeList[i]->value.numeric = &attr_tmp[2*i+1];
129 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
134 zapt->attributeList = ODR_NULLVAL;
136 term->which = Z_Term_general;
137 term->u.general = term_octet;
138 term_octet->buf = odr_malloc (o, query_lex_len);
139 term_octet->size = term_octet->len = query_lex_len;
140 memcpy (term_octet->buf, query_lex_buf, query_lex_len);
144 static Z_Operand *rpn_simple (ODR o, int num_attr, int *attr_list)
148 zo = odr_malloc (o, sizeof(*zo));
152 zo->which = Z_Operand_APT;
153 if (!(zo->u.attributesPlusTerm = rpn_term (o, num_attr, attr_list)))
161 zo->which = Z_Operand_resultSetId;
162 zo->u.resultSetId = odr_malloc (o, query_lex_len+1);
163 memcpy (zo->u.resultSetId, query_lex_buf, query_lex_len);
164 zo->u.resultSetId[query_lex_len] = '\0';
173 static Z_Complex *rpn_complex (ODR o, int num_attr, int max_attr,
179 zc = odr_malloc (o, sizeof(*zc));
180 zo = odr_malloc (o, sizeof(*zo));
185 zo->which = Z_Operator_and;
186 zo->u.and = ODR_NULLVAL;
189 zo->which = Z_Operator_or;
190 zo->u.and = ODR_NULLVAL;
193 zo->which = Z_Operator_and_not;
194 zo->u.and = ODR_NULLVAL;
200 if (!(zc->s1 = rpn_structure (o, num_attr, max_attr, attr_list)))
202 if (!(zc->s2 = rpn_structure (o, num_attr, max_attr, attr_list)))
207 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
213 sz = odr_malloc (o, sizeof(*sz));
219 sz->which = Z_RPNStructure_complex;
220 if (!(sz->u.complex = rpn_complex (o, num_attr, max_attr, attr_list)))
225 sz->which = Z_RPNStructure_simple;
226 if (!(sz->u.simple = rpn_simple (o, num_attr, attr_list)))
233 if (!(cp = strchr (query_lex_buf, '=')))
235 if (num_attr >= max_attr)
237 attr_list[2*num_attr] = atoi (query_lex_buf);
238 attr_list[2*num_attr+1] = atoi (cp+1);
241 return rpn_structure (o, num_attr, max_attr, attr_list);
242 case 0: /* operator/operand expected! */
248 Z_RPNQuery *p_query_rpn (ODR o, const char *qbuf)
251 int attr_array[1024];
254 zq = odr_malloc (o, sizeof(*zq));
255 zq->attributeSetId = NULL;
257 if (!(zq->RPNStructure = rpn_structure (o, 0, 512, attr_array)))
262 Z_AttributesPlusTerm *p_query_scan (ODR o, const char *qbuf)
275 if (!(cp = strchr (query_lex_buf, '=')))
277 if (num_attr >= max_attr)
279 attr_list[2*num_attr] = atoi (query_lex_buf);
280 attr_list[2*num_attr+1] = atoi (cp+1);
285 return rpn_term (o, num_attr, attr_list);