ProceduralStructGenerator's genRecord and genEnum were package-private, and only extractClassStruct was made public.
However, this package private visibility rendered them unable to be used by the rest of wpilib(and advanced users).
Here, ProceduralStructGenerator is split into 2 classes: StructGenerator(which generates structs) and StructFetcher(the new namespace for extractClassStruct). In addition, genRecord and genEnum have been made public methods.
After a struct-type field descriptor had offsets calculated more than once, IsBitField would return true, causing the second call to CalculateOffsets to calculate incorrect offsets.
This makes it easier to define schemas when the type name is non-trivial (e.g., templated structs).
This is breaking for a) custom struct implementations and b) anything calling `wpi::Struct<T>::GetTypeString(info...)` in C++ directly. In both cases, it's a simple translation: For A, rename `GetTypeString()` to `GetTypeName()` and remove the struct: at the beginning, and for B, use `wpi::GetStructTypeString<T>(info...)` instead.
Update() checks/updates the last value and appends only if changed.
GetLastValue() gets the last value.
Also add OutputStream support to Java DataLogWriter.
Dynamic structs had a few major issues.
In C++, if the string was the last definition in the schema, attempting to set a string would trigger an assertion. This has been fixed
Setting a string value could truncate the string actually stored in the struct, if the definition was shorter than the string to set.
There was no way to detect if this case occurred. The set string function now returns a bool if the string was fully written or not.
Reading a string that had a value shorter than the schema definition would result in embedded trailing nulls in the string. This would make comparing string equality basically impossible, as those embedded nulls count for the length of the string.
The above truncating didn't take into account UTF8 code points. This means a truncation could happen in the middle of a unicode character. Depending on the language this had different behavior, but unpaired code points are problematic to detect in any case. On the decoding side, detect if a split UTF8 code point has occurred by the writer, and if so just ignore it and treat it as not part of the string. Doing this on the receive side means a newer receive side is all that is needed to fix this, which is generally a better option then requiring all senders to update.
Actual DynamicStruct instances have 0 units tests for them. Added a bunch of unit tests around strings to ensure things work properly.
This adds support for two serialization formats for complex data types:
- Protobuf for complex objects with variable length internals that need forward and backward wire compatibility (lower speed, more flexible)
- Raw struct (ByteBuffer-style) for fixed-length objects (higher speed, less flexible)
Deserialization can be done either by creating a new object (for immutable objects) or overwriting the contents of an existing object (for mutable objects).
Implementing classes should provide inner classes that implement the Protobuf or Struct interface (in Java) or specialize the wpi::Protobuf or wpi::Struct struct (in C++). It is possible for classes to implement both. If the class itself does not implement serialization, it's possible for third parties/users to provide an implementation instead.
Uses the Google protobuf implementation for C++ and the QuickBuffers alternative protobuf implementation for Java.
The following source code changes were required:
* Whitespace changes from spotless
* PMD warning suppressions for utility class tests
* PMD warning rename from "BeanMembersShouldSerialize" to
"NonSerializableClass"
* Declared more class members as final
- Add InterpolatedTreeMap for Java from team 254's 2016 MIT licensed code
- Add InterpolatedMap for C++ from team 3512's code with @calcmogul (original author) permission
Co-authored-by: Tyler Veness <calcmogul@gmail.com>
