[2094] added a new subdirectory for in-memory backend implementation details

configure.ac

@@ -1101,6 +1101,7 @@ AC_CONFIG_FILES([Makefile
                  src/lib/exceptions/Makefile
                  src/lib/exceptions/tests/Makefile
                  src/lib/datasrc/Makefile
+                 src/lib/datasrc/memory/Makefile
                  src/lib/datasrc/tests/Makefile
                  src/lib/datasrc/tests/testdata/Makefile
                  src/lib/xfr/Makefile

src/lib/datasrc/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = . tests
+SUBDIRS = memory . tests
 
 AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
 AM_CPPFLAGS += -I$(top_srcdir)/src/lib/dns -I$(top_builddir)/src/lib/dns
@@ -64,6 +64,7 @@ libdatasrc_la_LIBADD = $(top_builddir)/src/lib/exceptions/libexceptions.la
 libdatasrc_la_LIBADD += $(top_builddir)/src/lib/dns/libdns++.la
 libdatasrc_la_LIBADD += $(top_builddir)/src/lib/log/liblog.la
 libdatasrc_la_LIBADD += $(top_builddir)/src/lib/cc/libcc.la
+libdatasrc_la_LIBADD += memory/libdatasrc_memory.la
 libdatasrc_la_LIBADD += $(SQLITE_LIBS)
 
 BUILT_SOURCES = datasrc_config.h datasrc_messages.h datasrc_messages.cc

src/lib/datasrc/memory/Makefile.am

@@ -0,0 +1,11 @@
+AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
+AM_CPPFLAGS += -I$(top_srcdir)/src/lib/dns -I$(top_builddir)/src/lib/dns
+AM_CPPFLAGS += $(BOOST_INCLUDES)
+AM_CPPFLAGS += $(SQLITE_CFLAGS)
+
+AM_CXXFLAGS = $(B10_CXXFLAGS)
+
+CLEANFILES = *.gcno *.gcda datasrc_messages.h datasrc_messages.cc
+
+noinst_LTLIBRARIES = libdatasrc_memory.la
+libdatasrc_memory_la_SOURCES = rdata_encoder.h rdata_encoder.cc

src/lib/datasrc/memory/rdata_encoder.cc

@@ -0,0 +1,110 @@
+// Copyright (C) 2012  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#include <dns/rrclass.h>
+#include <dns/rrtype.h>
+
+#include "rdata_encoder.h"
+
+#include <stdint.h>
+
+using namespace isc::dns;
+
+namespace isc {
+namespace datasrc {
+namespace memory {
+
+namespace {
+#ifdef notyet
+inline RdataNameAttributes
+operator&(RdataNameAttributes a1, RdataNameAttributes a2) {
+    return (static_cast<RdataNameAttributes>(
+                static_cast<unsigned int>(a1) &
+                static_cast<unsigned int>(a2)));
+}
+#endif
+struct RdataFieldSpec {
+    enum FieldType {
+        FIXEDLEN_DATA = 0,
+        VARLEN_DATA,
+        DOMAIN_NAME
+    };
+        
+    FieldType type;
+    union {
+        uint16_t fixeddata_len;
+        RdataNameAttributes name_attributes;
+    };
+};
+
+struct RdataEncodeSpec {
+    uint16_t field_count;
+    uint16_t name_count;
+    uint16_t varlen_count;
+    const RdataFieldSpec* fields;
+};
+
+const uint16_t NAME_NOATTRIBUTE_INITIALIZER = static_cast<uint16_t>(0);
+const uint16_t NAME_COMPRESSIBLE_INITIALIZER =
+    static_cast<uint16_t>(NAME_COMPRESSIBLE);
+const uint16_t NAME_ADDITIONAL_INITIALIZER =
+    static_cast<uint16_t>(NAME_ADDITIONAL);
+const uint16_t NAME_COMPADDITIONAL_INITIALIZER =
+    static_cast<uint16_t>(NAME_COMPRESSIBLE | NAME_ADDITIONAL);
+
+const RdataFieldSpec generic_data_fields[] = {
+    {RdataFieldSpec::VARLEN_DATA, {0}}
+};
+const uint16_t generic_data_fields_count =
+    sizeof(generic_data_fields) / sizeof(RdataFieldSpec);
+
+const RdataFieldSpec generic_single_name_fields[] = {
+    {RdataFieldSpec::VARLEN_DATA, {NAME_COMPADDITIONAL_INITIALIZER}}
+};
+
+// Class IN encode specs
+const RdataEncodeSpec encode_spec_list_in[] = {
+    {generic_data_fields_count, 0, 0, generic_data_fields} // type #0
+};
+
+#ifdef notyet
+inline
+const RdataEncodeSpec&
+getRdataEncodeSpec(RRClass rrclass, RRType rrtype) {
+    if (rrclass == RRClass::IN()) {
+        return (encode_spec_list_in[rrtype.getCode()]);
+    }
+    return (encode_spec_list_in[0]);
+}
+#endif
+} // end of unnamed namespace
+
+#ifdef notyet
+void
+testRdataEncoder(const Rdata& rdata, RRClass rrclass, RRType rrtype,
+                 vector<uint8_t>& result)
+{
+    const RdataEncodeSpec& encode_spec = getRdataEncodeSpec(rrclass, rrtype);
+    for (size_t i = 0; i < encode_spec.field_count; ++i) {
+        const RdataFieldSpec& field_spec = *encode_spec.fields[i];
+        if (field_spec.type == RdataFieldSpec::FIXEDLEN_DATA)
+        assert(encode_spec.fields[i] != NULL);
+        
+    }
+}
+#endif
+
+} // namespace memory
+} // namespace datasrc
+} // datasrc isc

src/lib/datasrc/memory/rdata_encoder.h

@@ -0,0 +1,35 @@
+// Copyright (C) 2012  Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef DATASRC_MEMORY_RDATA_ENCODER_H
+#define DATASRC_MEMORY_RDATA_ENCODER_H 1
+
+namespace isc {
+namespace datasrc {
+namespace memory {
+
+enum RdataNameAttributes {
+    NAME_COMPRESSIBLE = 1,
+    NAME_ADDITIONAL = (NAME_COMPRESSIBLE << 1)
+};
+
+} // namespace memory
+} // namespace datasrc
+} // namespace isc
+
+#endif // DATASRC_MEMORY_RDATA_ENCODER_H
+
+// Local Variables:
+// mode: c++
+// End: