/* This file is part of the YAZ toolkit.
- * Copyright (C) 1995-2011 Index Data
+ * Copyright (C) 1995-2012 Index Data
* See the file LICENSE for details.
*/
/**
int i;
const char *ns = cn->u.st.index_uri;
int process_term = !has_modifier(cn, "regexp");
- char *z3958_mem = 0;
+ int z3958_mode = 0;
assert(cn->which == CQL_NODE_ST);
}
else if (first_wc)
{
- /* We have one or more wildcard characters, but not in a
- * way that can be dealt with using only the standard
- * left-, right- and both-truncation attributes. We need
- * to translate the pattern into a Z39.58-type pattern,
- * which has been supported in BIB-1 since 1996. If
- * there's no configuration element for "truncation.z3958"
- * we indicate this as error 28 "Masking character not
- * supported".
- */
- int i;
+ z3958_mode = 1;
cql_pr_attr(ct, "truncation", "z3958", 0,
pr, client_data, YAZ_SRW_MASKING_CHAR_UNSUPP);
- z3958_mem = (char *) xmalloc(length+1);
- for (i = 0; i < length; i++)
- {
- if (i > 0 && term[i-1] == '\\')
- z3958_mem[i] = term[i];
- else if (term[i] == '*')
- z3958_mem[i] = '?';
- else if (term[i] == '?')
- z3958_mem[i] = '#';
- else
- z3958_mem[i] = term[i];
- }
- z3958_mem[length] = '\0';
- term = z3958_mem;
}
- else {
+ else
+ {
/* No masking characters. Use "truncation.none" if given. */
cql_pr_attr(ct, "truncation", "none", 0,
pr, client_data, 0);
}
}
+ /* produce only \-sequences if:
+ 1) the output is a Z39.58-trunc reserved character
+ 2) the output is a PQF reserved character (\\, \")
+ */
(*pr)("\"", client_data);
for (i = 0; i < length; i++)
{
- /* pr(int) each character */
- /* we do not need to deal with \-sequences because the
- CQL and PQF terms have same \-format, bug #1988 */
- char buf[2];
-
- buf[0] = term[i];
- buf[1] = '\0';
- (*pr)(buf, client_data);
+ char x[3]; /* temp buffer */
+ if (i > 0 && term[i-1] == '\\')
+ {
+ if (term[i] == '\"' || term[i] == '\\')
+ pr("\\", client_data);
+ if (z3958_mode && strchr("#?", term[i]))
+ pr("\\\\", client_data); /* double \\ to survive PQF parse */
+ x[0] = term[i];
+ x[1] = '\0';
+ pr(x, client_data);
+ }
+ else if (z3958_mode && term[i] == '*')
+ {
+ pr("?", client_data);
+ /* avoid ?n sequences output (n=[0-9]) because that has
+ different semantics than just a single ? in Z39.58
+ */
+ if (i < length - 1 && yaz_isdigit(term[i+1]))
+ pr("\\\\", client_data); /* double \\ to survive PQF parse */
+ }
+ else if (z3958_mode && term[i] == '?')
+ pr("#", client_data);
+ else if (term[i] != '\\')
+ {
+ if (term[i] == '\"')
+ pr("\\", client_data);
+ if (z3958_mode && strchr("#?", term[i]))
+ pr("\\\\", client_data); /* double \\ to survive PQF parse */
+ x[0] = term[i];
+ x[1] = '\0';
+ pr(x, client_data);
+ }
}
(*pr)("\" ", client_data);
- xfree(z3958_mem);
}
static void emit_terms(cql_transform_t ct,