CHANGELOG.md

@@ -12,6 +12,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Added
 
+- Add `util::DataWrapper` class inside the `util` module. This is a tagged union which allows
+  to specify raw data either as a classic C-style raw pointer and size or as a `SerializeIF`
+  pointer.
+  PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/668
 - Add new `UnsignedByteField` class
   PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/660
 

src/fsfw/pus/Service11TelecommandScheduling.tpp

@@ -581,8 +581,7 @@ inline ReturnValue_t Service11TelecommandScheduling<MAX_NUM_TCS>::getMapFilterFr
   }
 
   // additional security check, this should never be true
-  if ((itBegin != telecommandMap.end() and itEnd != telecommandMap.end()) and
-      (itBegin->first > itEnd->first)) {
+  if (itBegin > itEnd) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
     sif::error << "11::getMapFilterFromData: itBegin > itEnd\n" << std::endl;
 #else

src/fsfw/util/dataWrapper.h

@@ -0,0 +1,60 @@
+#ifndef FSFW_UTIL_DATAWRAPPER_H
+#define FSFW_UTIL_DATAWRAPPER_H
+
+#include <cstddef>
+#include <cstdint>
+#include <utility>
+
+#include "fsfw/serialize.h"
+
+namespace util {
+
+struct RawData {
+  RawData() = default;
+  const uint8_t* data = nullptr;
+  size_t len = 0;
+};
+
+enum DataTypes { NONE, RAW, SERIALIZABLE };
+
+union DataUnion {
+  RawData raw{};
+  SerializeIF* serializable;
+};
+
+struct DataWrapper {
+  DataTypes type = DataTypes::NONE;
+  DataUnion dataUnion;
+  using BufPairT = std::pair<const uint8_t*, size_t>;
+
+  [[nodiscard]] size_t getLength() const {
+    if (type == DataTypes::RAW) {
+      return dataUnion.raw.len;
+    } else if (type == DataTypes::SERIALIZABLE and dataUnion.serializable != nullptr) {
+      return dataUnion.serializable->getSerializedSize();
+    }
+    return 0;
+  }
+
+  [[nodiscard]] bool isNull() const {
+    if ((type == DataTypes::NONE) or (type == DataTypes::RAW and dataUnion.raw.data == nullptr) or
+        (type == DataTypes::SERIALIZABLE and dataUnion.serializable == nullptr)) {
+      return true;
+    }
+    return false;
+  }
+  void setRawData(BufPairT bufPair) {
+    type = DataTypes::RAW;
+    dataUnion.raw.data = bufPair.first;
+    dataUnion.raw.len = bufPair.second;
+  }
+
+  void setSerializable(SerializeIF& serializable) {
+    type = DataTypes::SERIALIZABLE;
+    dataUnion.serializable = &serializable;
+  }
+};
+
+}  // namespace util
+
+#endif  // FSFW_UTIL_DATAWRAPPER_H

unittests/util/CMakeLists.txt

@@ -1,3 +1,4 @@
 target_sources(${FSFW_TEST_TGT} PRIVATE
   testUnsignedByteField.cpp
+  testDataWrapper.cpp
 )

unittests/util/testDataWrapper.cpp

@@ -0,0 +1,32 @@
+#include <array>
+#include <catch2/catch_test_macros.hpp>
+
+#include "fsfw/util/dataWrapper.h"
+#include "mocks/SimpleSerializable.h"
+
+TEST_CASE("Data Wrapper", "[util]") {
+  util::DataWrapper wrapper;
+  SECTION("State") {
+    REQUIRE(wrapper.isNull());
+    REQUIRE(wrapper.type == util::DataTypes::NONE);
+  }
+
+  SECTION("Set Raw Data") {
+    REQUIRE(wrapper.isNull());
+    std::array<uint8_t, 4> data = {1, 2, 3, 4};
+    wrapper.setRawData({data.data(), data.size()});
+    REQUIRE(not wrapper.isNull());
+    REQUIRE(wrapper.type == util::DataTypes::RAW);
+    REQUIRE(wrapper.dataUnion.raw.data == data.data());
+    REQUIRE(wrapper.dataUnion.raw.len == data.size());
+  }
+
+  SECTION("Simple Serializable") {
+    REQUIRE(wrapper.isNull());
+    SimpleSerializable serializable;
+    wrapper.setSerializable(serializable);
+    REQUIRE(not wrapper.isNull());
+    REQUIRE(wrapper.type == util::DataTypes::SERIALIZABLE);
+    REQUIRE(wrapper.dataUnion.serializable == &serializable);
+  }
+}

unittests/util/testUnsignedByteField.cpp

@@ -4,7 +4,7 @@
 
 #include "fsfw/util/UnsignedByteField.h"
 
-TEST_CASE("Unsigned Byte Field", "[unsigned-byte-field]") {
+TEST_CASE("Unsigned Byte Field", "[util]") {
   auto testByteField = UnsignedByteField<uint32_t>(10);
   auto u32ByteField = U32ByteField(10);
   auto u16ByteField = U16ByteField(5);