Move onnx to seperate directory

CMakeLists.txt

@@ -13,14 +13,5 @@ add_library(rtg
 )
 target_include_directories(rtg PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>)
 
-# Move ONNX reader to seperate directory
-find_package(Protobuf REQUIRED)
-
-protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS onnx.proto)
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-
-add_executable(read_onnx src/read_onnx.cpp ${PROTO_SRCS})
-target_include_directories(read_onnx PUBLIC ${PROTOBUF_INLCUDE_DIR})
-target_link_libraries(read_onnx ${PROTOBUF_LIBRARY} rtg)
-
+add_subdirectory(onnx)
 add_subdirectory(test)

include/rtg/float_equal.hpp

+#ifndef GUARD_RTGLIB_FLOAT_EQUAL_HPP
+#define GUARD_RTGLIB_FLOAT_EQUAL_HPP
+
+#include <algorithm>
+#include <cmath>
+#include <numeric>
+#ifdef _MSC_VER
+#include <iso646.h>
+#endif
+
+namespace rtg {
+
+template <class... Ts>
+using common_type = typename std::common_type<Ts...>::type;
+
+struct float_equal_fn
+{
+    template <class T>
+    static bool apply(T x, T y)
+    {
+        return std::isfinite(x) and std::isfinite(y) and
+               std::nextafter(x, std::numeric_limits<T>::lowest()) <= y and
+               std::nextafter(x, std::numeric_limits<T>::max()) >= y;
+    }
+
+    template <class T, class U>
+    bool operator()(T x, U y) const
+    {
+        return float_equal_fn::apply<common_type<T, U>>(x, y);
+    }
+};
+
+static constexpr float_equal_fn float_equal{};
+
+} // namespace rtg
+
+#endif

onnx/CMakeLists.txt

+find_package(Protobuf REQUIRED)
+
+protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS onnx.proto)
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+add_executable(read_onnx read_onnx.cpp ${PROTO_SRCS})
+target_include_directories(read_onnx PUBLIC ${PROTOBUF_INCLUDE_DIR})
+target_link_libraries(read_onnx ${PROTOBUF_LIBRARY} rtg)