build: exposing parameters for msgpack to json buffer

Exposing configuration parameters to determine the function
'flb_msgpack_raw_to_json_sds' buffer strategy. This parameters
can be set during build configuration in the following way :

cmake ../ -DFLB_MSGPACK_TO_JSON_INIT_BUFFER_SIZE=1.5 \
  -DFLB_MSGPACK_TO_JSON_REALLOC_BUFFER_SIZE=.10

Signed-off-by: Francisco Valente <[email protected]>

Author: franciscovalentecastro

CMakeLists.txt

@@ -680,6 +680,19 @@ if(FLB_HAVE_ATTRIBUTE_ALLOC_SIZE)
   FLB_DEFINITION(FLB_HAVE_ATTRIBUTE_ALLOC_SIZE)
 endif()
 
+# parameters for flb_msgpack_raw_to_json_sds buffer strategy
+if (NOT DEFINED FLB_MSGPACK_TO_JSON_INIT_BUFFER_SIZE)
+  FLB_DEFINITION_VAL(FLB_MSGPACK_TO_JSON_INIT_BUFFER_SIZE 2.0)
+else()
+  FLB_DEFINITION_VAL(FLB_MSGPACK_TO_JSON_INIT_BUFFER_SIZE ${FLB_MSGPACK_TO_JSON_INIT_BUFFER_SIZE})
+endif()
+
+if (NOT DEFINED FLB_MSGPACK_TO_JSON_REALLOC_BUFFER_SIZE)
+  FLB_DEFINITION_VAL(FLB_MSGPACK_TO_JSON_REALLOC_BUFFER_SIZE 0.10)
+else()
+  FLB_DEFINITION_VAL(FLB_MSGPACK_TO_JSON_REALLOC_BUFFER_SIZE ${FLB_MSGPACK_TO_JSON_REALLOC_BUFFER_SIZE})
+endif()
+
 # Build tools/xxd-c
 add_subdirectory(tools/xxd-c)