msgpuck: activate MP_EXT custom serializers

Msgpuck functions mp_snprint() and mp_fprint() now support
customizable MP_EXT serializer. This patch makes them able to
correctly serialize all tarantool's MP_EXT extensions: MP_DECIMAL,
MP_UUID, MP_ERROR.

Closes #4719

Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Serge Petrenko <sergepetrenko@tarantool.org>
Reviewed-by: Nikita Pettik <korablev@tarantool.org>
Reviewed-by: Alexander Turenko <alexander.turenko@tarantool.org>

src/box/CMakeLists.txt

@@ -71,6 +71,7 @@ add_library(xlog STATIC xlog.c)
 target_link_libraries(xlog core box_error crc32 ${ZSTD_LIBRARIES})
 
 add_library(box STATIC
+    msgpack.c
     iproto.cc
     xrow_io.cc
     tuple_convert.c

src/box/box.cc

@@ -76,6 +76,7 @@
 #include "func.h"
 #include "sequence.h"
 #include "sql_stmt_cache.h"
+#include "msgpack.h"
 
 static char status[64] = "unknown";
 
@@ -2346,6 +2347,7 @@ on_wal_checkpoint_threshold(void)
 void
 box_init(void)
 {
+	msgpack_init();
 	fiber_cond_create(&ro_cond);
 
 	user_cache_init();

src/box/msgpack.c

+/*
+ * Copyright 2020, Tarantool AUTHORS, please see AUTHORS file.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above
+ *    copyright notice, this list of conditions and the
+ *    following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials
+ *    provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * <COPYRIGHT HOLDER> OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include "msgpack.h"
+#include "msgpuck/msgpuck.h"
+
+#include "mp_extension_types.h"
+#include "mp_decimal.h"
+#include "uuid/mp_uuid.h"
+#include "mp_error.h"
+
+static int
+msgpack_fprint_ext(FILE *file, const char **data, int depth)
+{
+	const char **orig = data;
+	int8_t type;
+	uint32_t len = mp_decode_extl(data, &type);
+	switch(type) {
+	case MP_DECIMAL:
+		return mp_fprint_decimal(file, data, len);
+	case MP_UUID:
+		return mp_fprint_uuid(file, data, len);
+	case MP_ERROR:
+		return mp_fprint_error(file, data, depth);
+	default:
+		return mp_fprint_ext_default(file, orig, depth);
+	}
+}
+
+static int
+msgpack_snprint_ext(char *buf, int size, const char **data, int depth)
+{
+	const char **orig = data;
+	int8_t type;
+	uint32_t len = mp_decode_extl(data, &type);
+	switch(type) {
+	case MP_DECIMAL:
+		return mp_snprint_decimal(buf, size, data, len);
+	case MP_UUID:
+		return mp_snprint_uuid(buf, size, data, len);
+	case MP_ERROR:
+		return mp_snprint_error(buf, size, data, depth);
+	default:
+		return mp_snprint_ext_default(buf, size, orig, depth);
+	}
+}
+
+void
+msgpack_init(void)
+{
+	mp_fprint_ext = msgpack_fprint_ext;
+	mp_snprint_ext = msgpack_snprint_ext;
+}

src/box/msgpack.h

+#pragma once
+/*
+ * Copyright 2020, Tarantool AUTHORS, please see AUTHORS file.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above
+ *    copyright notice, this list of conditions and the
+ *    following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials
+ *    provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * <COPYRIGHT HOLDER> OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#if defined(__cplusplus)
+extern "C" {
+#endif /* defined(__cplusplus) */
+
+void
+msgpack_init(void);
+
+#if defined(__cplusplus)
+}
+#endif /* defined(__cplusplus) */