+/* Lifted verbatim from Net::Z3950 yazwrap/util.c */
+#include <stdarg.h>
+void fatal(char *fmt, ...)
+{
+ va_list ap;
+
+ fprintf(stderr, "FATAL (yazwrap): ");
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+ abort();
+}
+
+
+/* Lifted verbatim from Net::Z3950 yazwrap/receive.c */
+/*
+ * Creates a new Perl object of type `class'; the newly-created scalar
+ * that is a reference to the blessed thingy `referent' is returned.
+ */
+static SV *newObject(char *class, SV *referent)
+{
+ HV *stash;
+ SV *sv;
+
+ sv = newRV_noinc((SV*) referent);
+ stash = gv_stashpv(class, 0);
+ if (stash == 0)
+ fatal("attempt to create object of undefined class '%s'", class);
+ /*assert(stash != 0);*/
+ sv_bless(sv, stash);
+ return sv;
+}
+
+
+/* Lifted verbatim from Net::Z3950 yazwrap/receive.c */
+static void setMember(HV *hv, char *name, SV *val)
+{
+ /* We don't increment `val's reference count -- I think this is
+ * right because it's created with a refcount of 1, and in fact
+ * the reference via this hash is the only reference to it in
+ * general.
+ */
+ if (!hv_store(hv, name, (U32) strlen(name), val, (U32) 0))
+ fatal("couldn't store member in hash");
+}
+
+
+/* Lifted verbatim from Net::Z3950 yazwrap/receive.c */
+static SV *translateOID(Odr_oid *x)
+{
+ /* Yaz represents an OID by an int array terminated by a negative
+ * value, typically -1; we represent it as a reference to a
+ * blessed scalar string of "."-separated elements.
+ */
+ char buf[1000];
+ int i;
+
+ *buf = '\0';
+ for (i = 0; x[i] >= 0; i++) {
+ sprintf(buf + strlen(buf), "%d", (int) x[i]);
+ if (x[i+1] >- 0)
+ strcat(buf, ".");
+ }
+
+ /*
+ * ### We'd like to return a blessed scalar (string) here, but of
+ * course you can't do that in Perl: only references can be
+ * blessed, so we'd have to return a _reference_ to a string, and
+ * bless _that_. Better to do without the blessing, I think.
+ */
+ if (1) {
+ return newSVpv(buf, 0);
+ } else {
+ return newObject("Net::Z3950::APDU::OID", newSVpv(buf, 0));
+ }
+}
+
+
+static SV *rpn2perl(Z_RPNStructure *s)
+{
+ SV *sv;
+ HV *hv;
+ AV *av;
+
+ switch (s->which) {
+ case Z_RPNStructure_simple: {
+ Z_Operand *o = s->u.simple;
+ Z_AttributesPlusTerm *at;
+ if (o->which != Z_Operand_APT)
+ fatal("can't handle RPN simples other than APT");
+ at = o->u.attributesPlusTerm;
+ if (at->term->which != Z_Term_general)
+ fatal("can't handle RPN terms other than general");
+
+ sv = newObject("Net::Z3950::RPN::Term", (SV*) (hv = newHV()));
+ if (at->attributes) {
+ int i;
+ SV *attrs = newObject("Net::Z3950::RPN::Attributes",
+ (SV*) (av = newAV()));
+ for (i = 0; i < at->attributes->num_attributes; i++) {
+ Z_AttributeElement *elem = at->attributes->attributes[i];
+ HV *hv2;
+ SV *tmp = newObject("Net::Z3950::RPN::Attribute",
+ (SV*) (hv2 = newHV()));
+ if (elem->attributeSet)
+ setMember(hv2, "attributeSet",
+ translateOID(elem->attributeSet));
+ setMember(hv2, "attributeType",
+ newSViv(*elem->attributeType));
+ assert(elem->which == Z_AttributeValue_numeric);
+ setMember(hv2, "attributeValue",
+ newSViv(*elem->value.numeric));
+ av_push(av, tmp);
+ }
+ setMember(hv, "attributes", attrs);
+ }
+ setMember(hv, "term", newSVpv((char*) at->term->u.general->buf,
+ at->term->u.general->len));
+ return sv;
+ }
+ case Z_RPNStructure_complex: {
+ SV *tmp;
+ Z_Complex *c = s->u.complex;
+ char *type = 0; /* vacuous assignment satisfies gcc -Wall */
+ switch (c->roperator->which) {
+ case Z_Operator_and: type = "Net::Z3950::RPN::And"; break;
+ case Z_Operator_or: type = "Net::Z3950::RPN::Or"; break;
+ case Z_Operator_and_not: type = "Net::Z3950::RPN::AndNot"; break;
+ case Z_Operator_prox: fatal("proximity not yet supported");
+ default: fatal("unknown RPN operator %d", (int) c->roperator->which);
+ }
+ sv = newObject(type, (SV*) (av = newAV()));
+ if ((tmp = rpn2perl(c->s1)) == 0)
+ return 0;
+ av_push(av, tmp);
+ if ((tmp = rpn2perl(c->s2)) == 0)
+ return 0;
+ av_push(av, tmp);
+ return sv;
+ }
+ default: fatal("unknown RPN node type %d", (int) s->which);
+ }
+
+ return 0;
+}
+
+
+static SV *zquery2perl(Z_Query *q)
+{
+ SV *sv;
+ HV *hv;
+
+ if (q->which != Z_Query_type_1 && q->which != Z_Query_type_101)
+ return 0;
+ sv = newObject("Net::Z3950::APDU::Query", (SV*) (hv = newHV()));
+ if (q->u.type_1->attributeSetId)
+ setMember(hv, "attributeSet",
+ translateOID(q->u.type_1->attributeSetId));
+ setMember(hv, "query", rpn2perl(q->u.type_1->RPNStructure));
+ return sv;
+}
+
+