Fix wchar deserialize error when swaping the bytes

src/cpp/Cdr.cpp

@@ -1643,13 +1643,8 @@ Cdr& Cdr::deserialize(
         // Allocate memory.
         string_t = reinterpret_cast<wchar_t*>(calloc(length + 1, sizeof(wchar_t))); // WStrings never serialize terminating zero
 
-        for (size_t idx = 0; idx < length; ++idx)
-        {
-            uint16_t temp;
-            offset_ >> temp;
-            string_t[idx] = static_cast<wchar_t>(temp);
-            offset_ += sizeof(uint16_t);
-        }
+        deserialize_array(string_t, length);
+
         return *this;
     }
 

test/cdr/SimpleTest.cpp

@@ -1900,6 +1900,32 @@ TEST(CDRTests, CWString)
 
     free(c_string_value);
 
+    // Check the big endianness case
+    char buffer_bigendi[BUFFER_LENGTH];
+
+    // Serialization.
+    FastBuffer cdrbuffer_bigendi(buffer_bigendi, BUFFER_LENGTH);
+    Cdr cdr_ser_bigendi(cdrbuffer_bigendi, eprosima::fastcdr::Cdr::Endianness::BIG_ENDIANNESS);
+
+    EXPECT_NO_THROW(
+    {
+        cdr_ser_bigendi.serialize(c_wstring_t);
+    });
+
+    // Deserialization.
+    Cdr cdr_des_bigendi(cdrbuffer_bigendi, eprosima::fastcdr::Cdr::Endianness::BIG_ENDIANNESS);
+
+    wchar_t* c_wstring_bigendi {nullptr};
+
+    EXPECT_NO_THROW(
+    {
+        cdr_des_bigendi.deserialize(c_wstring_bigendi);
+    });
+
+    EXPECT_EQ(wcscmp(c_wstring_bigendi, c_wstring_t), 0);
+
+    free(c_wstring_bigendi);
+
     // Check bad case without space
     char buffer_bad[1];