initial release

git-svn-id: http://svn.miranda-ng.org/main/trunk@12409 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

4 files changed, 1246 insertions, 0 deletions

diff --git a/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/Makefile.am b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/Makefile.am
new file mode 100644
index 0000000000..b5c5c881f4
--- /dev/null
+++ b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/Makefile.am
@@ -0,0 +1,15 @@
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+messages.pb.cc proto: $(srcdir)/messages.proto
+	protoc $(srcdir)/messages.proto --cpp_out=.
+
diff --git a/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/Makefile.in b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/Makefile.in
new file mode 100644
index 0000000000..e198a11d7d
--- /dev/null
+++ b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/Makefile.in
@@ -0,0 +1,627 @@
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+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am check check-am clean clean-generic \
+	clean-libtool clean-noinstLTLIBRARIES cscopelist-am ctags \
+	ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am
+
+messages.pb.cc proto: $(srcdir)/messages.proto
+	protoc $(srcdir)/messages.proto --cpp_out=.
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/messages.proto b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/messages.proto
new file mode 100644
index 0000000000..f8ec8fdcb6
--- /dev/null
+++ b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/messages.proto
@@ -0,0 +1,457 @@
+
+
+package hamsterdb;
+
+option optimize_for = LITE_RUNTIME;
+
+message ProtoWrapper {
+  enum Type {
+    CONNECT_REQUEST = 10;
+    CONNECT_REPLY   = 11;
+    DISCONNECT_REQUEST = 12;
+    DISCONNECT_REPLY   = 13;
+    ENV_RENAME_REQUEST  = 20;
+    ENV_RENAME_REPLY  = 21;
+    ENV_GET_PARAMETERS_REQUEST = 30;
+    ENV_GET_PARAMETERS_REPLY = 31;
+    ENV_GET_DATABASE_NAMES_REQUEST = 40;
+    ENV_GET_DATABASE_NAMES_REPLY = 41;
+    ENV_FLUSH_REQUEST = 50;
+    ENV_FLUSH_REPLY = 51;
+    ENV_CREATE_DB_REQUEST = 60;
+    ENV_CREATE_DB_REPLY = 61;
+    ENV_OPEN_DB_REQUEST = 70;
+    ENV_OPEN_DB_REPLY = 71;
+    ENV_ERASE_DB_REQUEST = 80;
+    ENV_ERASE_DB_REPLY = 81;
+    DB_CLOSE_REQUEST = 90;
+    DB_CLOSE_REPLY = 91;
+    DB_GET_PARAMETERS_REQUEST = 100;
+    DB_GET_PARAMETERS_REPLY = 101;
+    // DB_FLUSH_REQUEST = 110;
+    // DB_FLUSH_REPLY = 111;
+    TXN_BEGIN_REQUEST = 120;
+    TXN_BEGIN_REPLY = 121;
+    TXN_COMMIT_REQUEST = 130;
+    TXN_COMMIT_REPLY = 131;
+    TXN_ABORT_REQUEST = 140;
+    TXN_ABORT_REPLY = 141;
+    DB_CHECK_INTEGRITY_REQUEST = 150;
+    DB_CHECK_INTEGRITY_REPLY = 151;
+    DB_GET_KEY_COUNT_REQUEST = 160;
+    DB_GET_KEY_COUNT_REPLY = 161;
+    DB_INSERT_REQUEST = 170;
+    DB_INSERT_REPLY = 171;
+    DB_ERASE_REQUEST = 180;
+    DB_ERASE_REPLY = 181;
+    DB_FIND_REQUEST = 190;
+    DB_FIND_REPLY = 191;
+    CURSOR_CREATE_REQUEST = 200;
+    CURSOR_CREATE_REPLY = 201;
+    CURSOR_CLONE_REQUEST = 210;
+    CURSOR_CLONE_REPLY = 211;
+    CURSOR_CLOSE_REQUEST = 220;
+    CURSOR_CLOSE_REPLY = 221;
+    CURSOR_INSERT_REQUEST = 230;
+    CURSOR_INSERT_REPLY = 231;
+    CURSOR_ERASE_REQUEST = 240;
+    CURSOR_ERASE_REPLY = 241;
+    CURSOR_GET_RECORD_COUNT_REQUEST = 260;
+    CURSOR_GET_RECORD_COUNT_REPLY = 261;
+    CURSOR_GET_DUPLICATE_POSITION_REQUEST = 262;
+    CURSOR_GET_DUPLICATE_POSITION_REPLY = 263;
+    CURSOR_GET_RECORD_SIZE_REQUEST = 264;
+    CURSOR_GET_RECORD_SIZE_REPLY = 265;
+    CURSOR_OVERWRITE_REQUEST = 270;
+    CURSOR_OVERWRITE_REPLY = 271;
+    CURSOR_MOVE_REQUEST = 280;
+    CURSOR_MOVE_REPLY = 281;
+  }
+
+  required Type type = 1;
+
+  optional ConnectRequest connect_request = 10;
+  optional ConnectReply connect_reply   = 11;
+  optional DisconnectRequest disconnect_request = 12;
+  optional DisconnectReply disconnect_reply   = 13;
+  optional EnvRenameRequest env_rename_request   = 20;
+  optional EnvRenameReply env_rename_reply     = 21;
+  optional EnvGetParametersRequest env_get_parameters_request = 30;
+  optional EnvGetParametersReply env_get_parameters_reply = 31;
+  optional EnvGetDatabaseNamesRequest env_get_database_names_request = 40;
+  optional EnvGetDatabaseNamesReply env_get_database_names_reply = 41;
+  optional EnvFlushRequest env_flush_request = 50;
+  optional EnvFlushReply env_flush_reply = 51;
+  optional EnvCreateDbRequest env_create_db_request = 60;
+  optional EnvCreateDbReply env_create_db_reply = 61;
+  optional EnvOpenDbRequest env_open_db_request = 70;
+  optional EnvOpenDbReply env_open_db_reply = 71;
+  optional EnvEraseDbRequest env_erase_db_request = 80;
+  optional EnvEraseDbReply env_erase_db_reply = 81;
+  optional DbCloseRequest db_close_request = 90;
+  optional DbCloseReply db_close_reply = 91;
+  optional DbGetParametersRequest db_get_parameters_request = 100;
+  optional DbGetParametersReply db_get_parameters_reply = 101;
+  optional TxnBeginRequest txn_begin_request = 120;
+  optional TxnBeginReply txn_begin_reply = 121;
+  optional TxnCommitRequest txn_commit_request = 130;
+  optional TxnCommitReply txn_commit_reply = 131;
+  optional TxnAbortRequest txn_abort_request = 140;
+  optional TxnAbortReply txn_abort_reply = 141;
+  optional DbCheckIntegrityRequest db_check_integrity_request = 150;
+  optional DbCheckIntegrityReply db_check_integrity_reply = 151;
+  optional DbCountRequest db_count_request = 160;
+  optional DbCountReply db_count_reply = 161;
+  optional DbInsertRequest db_insert_request = 170;
+  optional DbInsertReply db_insert_reply = 171;
+  optional DbEraseRequest db_erase_request = 180;
+  optional DbEraseReply db_erase_reply = 181;
+  optional DbFindRequest db_find_request = 190;
+  optional DbFindReply db_find_reply = 191;
+  optional CursorCreateRequest cursor_create_request = 200;
+  optional CursorCreateReply cursor_create_reply = 201;
+  optional CursorCloneRequest cursor_clone_request = 210;
+  optional CursorCloneReply cursor_clone_reply = 211;
+  optional CursorCloseRequest cursor_close_request = 220;
+  optional CursorCloseReply cursor_close_reply = 221;
+  optional CursorInsertRequest cursor_insert_request = 230;
+  optional CursorInsertReply cursor_insert_reply = 231;
+  optional CursorEraseRequest cursor_erase_request = 240;
+  optional CursorEraseReply cursor_erase_reply = 241;
+  optional CursorGetRecordCountRequest cursor_get_record_count_request = 260;
+  optional CursorGetRecordCountReply cursor_get_record_count_reply = 261;
+  optional CursorGetDuplicatePositionRequest cursor_get_duplicate_position_request = 262;
+  optional CursorGetDuplicatePositionReply cursor_get_duplicate_position_reply = 263;
+  optional CursorGetRecordSizeRequest cursor_get_record_size_request = 264;
+  optional CursorGetRecordSizeReply cursor_get_record_size_reply = 265;
+  optional CursorOverwriteRequest cursor_overwrite_request = 270;
+  optional CursorOverwriteReply cursor_overwrite_reply = 271;
+  optional CursorMoveRequest cursor_move_request = 280;
+  optional CursorMoveReply cursor_move_reply = 281;
+}
+
+message ConnectRequest {
+  required string path = 1;
+}
+
+message ConnectReply {
+  required sint32 status = 1;
+  optional uint32 env_flags = 2;
+  optional uint64 env_handle = 3;
+}
+
+message DisconnectRequest {
+  required uint64 env_handle = 1;
+}
+
+message DisconnectReply {
+  required sint32 status = 1;
+}
+
+message EnvGetParametersRequest {
+  required uint64 env_handle = 1;
+  repeated uint32 names = 2;
+}
+
+message EnvGetParametersReply {
+  required sint32 status = 1;
+  optional uint32 cache_size = 2;
+  optional uint32 page_size = 3;
+  optional uint32 max_env_databases = 4;
+  optional uint32 flags = 5;
+  optional uint32 filemode = 6;
+  optional string filename = 7;
+};
+
+message EnvGetDatabaseNamesRequest {
+  required uint64 env_handle = 1;
+}
+
+message EnvGetDatabaseNamesReply {
+  required sint32 status = 1;
+  repeated uint32 names = 2;
+}
+
+message EnvRenameRequest {
+  required uint64 env_handle = 1;
+  required uint32 oldname = 2;
+  required uint32 newname = 3;
+  required uint32 flags = 4;
+}
+
+message EnvRenameReply {
+  required sint32 status = 1;
+};
+
+message EnvFlushRequest {
+  required uint64 env_handle = 1;
+  required uint32 flags = 2;
+}
+
+message EnvFlushReply {
+  required sint32 status = 1;
+};
+
+message EnvCreateDbRequest {
+  required uint64 env_handle = 1;
+  required uint32 dbname = 2;
+  required uint32 flags = 3;
+  repeated uint32 param_names = 4;
+  repeated uint64 param_values = 5;
+}
+
+message EnvCreateDbReply {
+  required sint32 status = 1;
+  optional uint64 db_handle = 2;
+  optional uint32 db_flags = 3;
+};
+
+message EnvOpenDbRequest {
+  required uint64 env_handle = 1;
+  required uint32 dbname = 2;
+  required uint32 flags = 3;
+  repeated uint32 param_names = 4;
+  repeated uint64 param_values = 5;
+}
+
+message EnvOpenDbReply {
+  required sint32 status = 1;
+  optional uint64 db_handle = 2;
+  optional uint32 db_flags = 3;
+};
+
+message EnvEraseDbRequest {
+  required uint64 env_handle = 1;
+  required uint32 name = 2;
+  required uint32 flags = 3;
+}
+
+message EnvEraseDbReply {
+  required sint32 status = 1;
+};
+
+message DbCloseRequest {
+  required uint64 db_handle = 1;
+  required uint32 flags = 2;
+}
+
+message DbCloseReply {
+  required sint32 status = 1;
+};
+
+message DbGetParametersRequest {
+  required uint64 db_handle = 1;
+  repeated uint32 names = 2;
+}
+
+message DbGetParametersReply {
+  required sint32 status = 1;
+  optional uint32 max_env_databases = 2;
+  optional uint32 flags = 3;
+  optional uint32 key_size = 4;
+  optional uint32 dbname = 5;
+  optional uint32 keys_per_page = 6;
+  optional uint32 key_type = 7;
+  optional uint32 record_size = 8;
+};
+
+message TxnBeginRequest {
+  required uint64 env_handle = 1;
+  required uint32 flags = 2;
+  optional string name = 3;
+}
+
+message TxnBeginReply {
+  required sint32 status = 1;
+  required uint64 txn_handle = 2;
+};
+
+message TxnCommitRequest {
+  required uint64 txn_handle = 1;
+  required uint32 flags = 2;
+}
+
+message TxnCommitReply {
+  required sint32 status = 1;
+};
+
+message TxnAbortRequest {
+  required uint64 txn_handle = 1;
+  required uint32 flags = 2;
+}
+
+message TxnAbortReply {
+  required sint32 status = 1;
+};
+
+message DbCheckIntegrityRequest {
+  required uint64 db_handle = 1;
+  required uint32 flags = 2;
+}
+
+message DbCheckIntegrityReply {
+  required sint32 status = 1;
+};
+
+message DbCountRequest {
+  required uint64 db_handle = 1;
+  required uint64 txn_handle = 2;
+  required bool distinct = 3;
+};
+
+message DbCountReply {
+  required sint32 status = 1;
+  required uint64 keycount = 2;
+};
+
+message Key {
+  optional bytes data = 1;
+  required uint32 flags = 2;
+  required uint32 intflags = 3;
+}
+
+message Record {
+  optional bytes data = 1;
+  required uint32 flags = 2;
+  required uint32 partial_offset = 3;
+  required uint32 partial_size = 4;
+}
+
+message DbInsertRequest {
+  required uint64 db_handle = 1;
+  required uint64 txn_handle = 2;
+  optional Key key = 3;
+  optional Record record = 4;
+  required uint32 flags = 5;
+};
+
+message DbInsertReply {
+  required sint32 status = 1;
+  optional Key key = 2;
+};
+
+message DbEraseRequest {
+  required uint64 db_handle = 1;
+  required uint64 txn_handle = 2;
+  required Key key = 3;
+  required uint32 flags = 4;
+};
+
+message DbEraseReply {
+  required sint32 status = 1;
+};
+
+message DbFindRequest {
+  required uint64 db_handle = 1;
+  required uint64 txn_handle = 2;
+  required uint64 cursor_handle = 3;
+  required Key key = 4;
+  optional Record record = 5;
+  required uint32 flags = 6;
+};
+
+message DbFindReply {
+  required sint32 status = 1;
+  required Record record = 2;
+  optional Key key = 3;
+};
+
+message CursorCreateRequest {
+  required uint64 db_handle = 1;
+  required uint64 txn_handle = 2;
+  required uint32 flags = 3;
+};
+
+message CursorCreateReply {
+  required sint32 status = 1;
+  required uint64 cursor_handle = 2;
+};
+
+message CursorCloneRequest {
+  required uint64 cursor_handle = 1;
+};
+
+message CursorCloneReply {
+  required sint32 status = 1;
+  required uint64 cursor_handle = 2;
+};
+
+message CursorCloseRequest {
+  required uint64 cursor_handle = 1;
+};
+
+message CursorCloseReply {
+  required sint32 status = 1;
+};
+
+message CursorInsertRequest {
+  required uint64 cursor_handle = 1;
+  optional Key key = 2;
+  optional Record record = 3;
+  required uint32 flags = 4;
+};
+
+message CursorInsertReply {
+  required sint32 status = 1;
+  optional Key key = 2;
+};
+
+message CursorEraseRequest {
+  required uint64 cursor_handle = 1;
+  required uint32 flags = 2;
+};
+
+message CursorEraseReply {
+  required sint32 status = 1;
+};
+
+message CursorGetRecordCountRequest {
+  required uint64 cursor_handle = 1;
+  required uint32 flags = 2;
+};
+
+message CursorGetRecordCountReply {
+  required sint32 status = 1;
+  required uint32 count = 2;
+};
+
+message CursorGetRecordSizeRequest {
+  required uint64 cursor_handle = 1;
+};
+
+message CursorGetRecordSizeReply {
+  required sint32 status = 1;
+  required uint64 size = 2;
+};
+
+message CursorGetDuplicatePositionRequest {
+  required uint64 cursor_handle = 1;
+};
+
+message CursorGetDuplicatePositionReply {
+  required sint32 status = 1;
+  required uint32 position = 2;
+};
+
+message CursorOverwriteRequest {
+  required uint64 cursor_handle = 1;
+  required Record record = 2;
+  required uint32 flags = 3;
+};
+
+message CursorOverwriteReply {
+  required sint32 status = 1;
+};
+
+message CursorMoveRequest {
+  required uint64 cursor_handle = 1;
+  optional Key key = 2;
+  optional Record record = 3;
+  required uint32 flags = 4;
+};
+
+message CursorMoveReply {
+  required sint32 status = 1;
+  optional Key key = 2;
+  optional Record record = 3;
+};
diff --git a/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/protocol.h b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/protocol.h
new file mode 100644
index 0000000000..8a2ab9d49f
--- /dev/null
+++ b/plugins/Dbx_kv/src/hamsterdb/src/2protobuf/protocol.h
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2005-2015 Christoph Rupp (chris@crupp.de).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Abstraction layer for the remote protocol
+ *
+ * @exception_safe: no
+ * @thread_safe: no
+ */
+
+#ifndef HAM_PROTOCOL_H
+#define HAM_PROTOCOL_H
+
+#include "0root/root.h"
+
+// Always verify that a file of level N does not include headers > N!
+#include "1mem/mem.h"
+#include "1base/error.h"
+#include "1base/dynamic_array.h"
+#include "2protobuf/messages.pb.h"
+
+#ifndef HAM_ROOT_H
+#  error "root.h was not included"
+#endif
+
+using namespace hamsterdb;
+
+/** a magic and version indicator for the remote protocol */
+#define HAM_TRANSFER_MAGIC_V1   (('h'<<24)|('a'<<16)|('m'<<8)|'1')
+
+/**
+ * the Protocol class maps a single message that is exchanged between
+ * client and server
+ */
+class Protocol : public hamsterdb::ProtoWrapper
+{
+  public:
+    Protocol() { }
+
+    /** constructor - assigns a type */
+    Protocol(hamsterdb::ProtoWrapper_Type type) {
+      set_type(type);
+    }
+
+    /** helper function which copies a ham_key_t into a ProtoBuf key */
+    static void assign_key(hamsterdb::Key *protokey, ham_key_t *hamkey,
+            bool deep_copy = true) {
+      if (deep_copy)
+        protokey->set_data(hamkey->data, hamkey->size);
+      protokey->set_flags(hamkey->flags);
+      protokey->set_intflags(hamkey->_flags);
+    }
+
+    /** helper function which copies a ham_record_t into a ProtoBuf record */
+    static void assign_record(hamsterdb::Record *protorec,
+            ham_record_t *hamrec, bool deep_copy = true) {
+      if (deep_copy)
+        protorec->set_data(hamrec->data, hamrec->size);
+      protorec->set_flags(hamrec->flags);
+      protorec->set_partial_offset(hamrec->partial_offset);
+      protorec->set_partial_size(hamrec->partial_size);
+    }
+
+    /**
+     * Factory function; creates a new Protocol structure from a serialized
+     * buffer
+     */
+    static Protocol *unpack(const uint8_t *buf, uint32_t size) {
+      if (*(uint32_t *)&buf[0] != HAM_TRANSFER_MAGIC_V1) {
+        ham_trace(("invalid protocol version"));
+        return (0);
+      }
+
+      Protocol *p = new Protocol;
+      if (!p->ParseFromArray(buf + 8, size - 8)) {
+        delete p;
+        return (0);
+      }
+      return (p);
+    }
+
+    /*
+     * Packs the Protocol structure into a memory buffer and returns
+     * a pointer to the buffer and the buffer size
+     */
+    bool pack(uint8_t **data, uint32_t *size) {
+      uint32_t packed_size = ByteSize();
+      /* we need 8 more bytes for magic and size */
+      uint8_t *p = Memory::allocate<uint8_t>(packed_size + 8);
+      if (!p)
+        return (false);
+
+      /* write the magic and the payload size of the packed structure */
+      *(uint32_t *)&p[0] = HAM_TRANSFER_MAGIC_V1;
+      *(uint32_t *)&p[4] = packed_size;
+
+      /* now write the packed structure */
+      if (!SerializeToArray(&p[8], packed_size)) {
+        Memory::release(p);
+        return (false);
+      }
+
+      *data = p;
+      *size = packed_size + 8;
+      return (true);
+    }
+
+    /*
+     * Packs the Protocol structure into a ByteArray
+     */
+    bool pack(ByteArray *barray) {
+      uint32_t packed_size = ByteSize();
+      /* we need 8 more bytes for magic and size */
+      uint8_t *p = (uint8_t *)barray->resize(packed_size + 8);
+      if (!p)
+        return (false);
+
+      /* write the magic and the payload size of the packed structure */
+      *(uint32_t *)&p[0] = HAM_TRANSFER_MAGIC_V1;
+      *(uint32_t *)&p[4] = packed_size;
+
+      /* now write the packed structure */
+      return (SerializeToArray(&p[8], packed_size));
+    }
+
+    /**
+     * shutdown/free globally allocated memory
+     */
+    static void shutdown() {
+      google::protobuf::ShutdownProtobufLibrary();
+    }
+};
+
+#endif /* HAM_PROTOCOL_H */