2 * Copyright (c) 1995, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.3 1995-06-14 11:06:35 adam
8 * Bug fix: Attributes wasn't interpreted correctly!
10 * Revision 1.2 1995/05/26 08:56:11 adam
11 * New function: p_query_scan.
13 * Revision 1.1 1995/05/22 15:31:49 adam
14 * New function, p_query_rpn, to convert from prefix (ascii) to rpn (asn).
27 static const char *query_buf;
28 static const char *query_lex_buf;
29 static int query_lex_len;
30 static int query_look = 0;
31 static char *left_sep = "{\"";
32 static char *right_sep = "}\"";
33 static int escape_char = '@';
35 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
38 static int query_token (const char **qptr, const char **lex_buf, int *lex_len)
40 const char *sep_match;
47 if ((sep_match = strchr (left_sep, **qptr)))
49 int sep_index = sep_match - left_sep;
53 while (**qptr && **qptr != right_sep[sep_index])
64 while (**qptr && **qptr != ' ')
70 if (*lex_len >= 1 && (*lex_buf)[0] == escape_char)
72 if (*lex_len == 4 && !memcmp (*lex_buf+1, "and", 3))
74 if (*lex_len == 3 && !memcmp (*lex_buf+1, "or", 2))
76 if (*lex_len == 4 && !memcmp (*lex_buf+1, "not", 3))
78 if (*lex_len == 5 && !memcmp (*lex_buf+1, "attr", 4))
80 if (*lex_len == 4 && !memcmp (*lex_buf+1, "set", 3))
89 query_token (&query_buf, &query_lex_buf, &query_lex_len);
92 static Z_AttributesPlusTerm *rpn_term (ODR o, int num_attr, int *attr_list)
94 Z_AttributesPlusTerm *zapt;
98 zapt = odr_malloc (o, sizeof(*zapt));
99 term_octet = odr_malloc (o, sizeof(*term_octet));
100 term = odr_malloc (o, sizeof(*term));
102 zapt->num_attributes = num_attr;
108 zapt->attributeList = odr_malloc (o, num_attr *
109 sizeof(*zapt->attributeList));
111 attr_tmp = odr_malloc (o, num_attr * 2 * sizeof(int));
112 memcpy (attr_tmp, attr_list, num_attr * 2 * sizeof(int));
113 for (i = 0; i < num_attr; i++)
115 zapt->attributeList[i] =
116 odr_malloc (o,sizeof(**zapt->attributeList));
117 zapt->attributeList[i]->attributeType = &attr_tmp[2*i];
118 zapt->attributeList[i]->attributeValue = &attr_tmp[2*i+1];
122 zapt->attributeList = ODR_NULLVAL;
124 term->which = Z_Term_general;
125 term->u.general = term_octet;
126 term_octet->buf = odr_malloc (o, query_lex_len);
127 term_octet->size = term_octet->len = query_lex_len;
128 memcpy (term_octet->buf, query_lex_buf, query_lex_len);
132 static Z_Operand *rpn_simple (ODR o, int num_attr, int *attr_list)
136 zo = odr_malloc (o, sizeof(*zo));
140 zo->which = Z_Operand_APT;
141 if (!(zo->u.attributesPlusTerm = rpn_term (o, num_attr, attr_list)))
149 zo->which = Z_Operand_resultSetId;
150 zo->u.resultSetId = odr_malloc (o, query_lex_len+1);
151 memcpy (zo->u.resultSetId, query_lex_buf, query_lex_len);
152 zo->u.resultSetId[query_lex_len] = '\0';
161 static Z_Complex *rpn_complex (ODR o, int num_attr, int max_attr,
167 zc = odr_malloc (o, sizeof(*zc));
168 zo = odr_malloc (o, sizeof(*zo));
173 zo->which = Z_Operator_and;
174 zo->u.and = ODR_NULLVAL;
177 zo->which = Z_Operator_or;
178 zo->u.and = ODR_NULLVAL;
181 zo->which = Z_Operator_and_not;
182 zo->u.and = ODR_NULLVAL;
188 if (!(zc->s1 = rpn_structure (o, num_attr, max_attr, attr_list)))
190 if (!(zc->s2 = rpn_structure (o, num_attr, max_attr, attr_list)))
195 static Z_RPNStructure *rpn_structure (ODR o, int num_attr, int max_attr,
201 sz = odr_malloc (o, sizeof(*sz));
207 sz->which = Z_RPNStructure_complex;
208 if (!(sz->u.complex = rpn_complex (o, num_attr, max_attr, attr_list)))
213 sz->which = Z_RPNStructure_simple;
214 if (!(sz->u.simple = rpn_simple (o, num_attr, attr_list)))
221 if (!(cp = strchr (query_lex_buf, '=')))
223 if (num_attr >= max_attr)
225 attr_list[2*num_attr] = atoi (query_lex_buf);
226 attr_list[2*num_attr+1] = atoi (cp+1);
229 return rpn_structure (o, num_attr, max_attr, attr_list);
230 case 0: /* operator/operand expected! */
236 Z_RPNQuery *p_query_rpn (ODR o, const char *qbuf)
239 int attr_array[1024];
242 zq = odr_malloc (o, sizeof(*zq));
243 zq->attributeSetId = NULL;
245 if (!(zq->RPNStructure = rpn_structure (o, 0, 512, attr_array)))
250 Z_AttributesPlusTerm *p_query_scan (ODR o, const char *qbuf)
263 if (!(cp = strchr (query_lex_buf, '=')))
265 if (num_attr >= max_attr)
267 attr_list[2*num_attr] = atoi (query_lex_buf);
268 attr_list[2*num_attr+1] = atoi (cp+1);
273 return rpn_term (o, num_attr, attr_list);