libpressio version 0.6.3

Bug Fixes:
- Previously the static library was built by default, not the
  shared library is built by default, and this is now configurable.
- Previously the metrics/size plugin required decompression to compute
  compression ratio unnecessarily, now only compression is required.

CMakeLists.txt

@@ -1,8 +1,9 @@
 cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
-project(libpressio VERSION "0.6.2" LANGUAGES CXX C)
+project(libpressio VERSION "0.6.3" LANGUAGES CXX C)
 
 enable_testing()
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+option(BUILD_SHARED_LIBS "build libpressio as a shared library" ON)
 
 include(GNUInstallDirs)
 find_package(ZFP REQUIRED)

src/plugins/metrics/size.cc

@@ -6,14 +6,14 @@
 class size_plugin : public libpressio_metrics_plugin {
   public:
 
-    void begin_compress(struct pressio_data const* input, pressio_data *const*) override {
+    void end_compress(struct pressio_data const* input, pressio_data *const* output, int) override {
       uncompressed_size = pressio_data_get_bytes(input);
+      compressed_size = pressio_data_get_bytes(*output);
+      compression_ratio =  static_cast<double>(*uncompressed_size)/ *compressed_size;
     }
 
-    void end_decompress(struct pressio_data const* input, pressio_data *const* output, int) override {
-      compressed_size = pressio_data_get_bytes(input);
+    void end_decompress(struct pressio_data const* , pressio_data *const* output, int) override {
       decompressed_size = pressio_data_get_bytes(*output);
-      compression_ratio =  static_cast<double>(*decompressed_size)/ *compressed_size;
     }
 
   struct pressio_options* get_metrics_results() const override {