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Raw Data and Type Identification

This module provides the RawData and ConstRawData classes for encapsulating raw data, along with the TypeID utility for type identification without relying on RTTI. These tools are useful for data description and cross-module data transfer in embedded environments.

RawData​

class RawData;

A generic data wrapper that stores a pointer and size in bytes.

Constructors​

  • RawData(void* addr, size_t size) – Specify address and size directly.
  • RawData() – Default constructor for empty data.
  • RawData(const T&) – Construct from any data object, referencing its address.
  • RawData(char*) – Construct from a C-style string (excluding trailing \0).
  • RawData(const char (&str)[N]) – Construct from a char array, with automatic size detection.
  • RawData(const std::string&) – Construct from a std::string.

Fields​

  • void* addr_ – Data pointer
  • size_t size_ – Size in bytes

ConstRawData​

class ConstRawData;

Read-only data wrapper, similar to RawData but with an immutable address:

Constructors​

  • Same as RawData, supports construction from RawData or const char*.
  • Ensures addr_ is of type const void*, suitable for protecting data from modification.

Fields​

  • const void* addr_ – Read-only data pointer
  • size_t size_ – Size in bytes

TypeID​

class TypeID;

A lightweight type identification tool to avoid RTTI and typeid.

Method​

template <typename T>
static TypeID::ID GetID();

Returns a globally unique address (const void*) for each type:

auto id1 = LibXR::TypeID::GetID<int>();
auto id2 = LibXR::TypeID::GetID<std::string>();

Useful for type registration, dispatching, or distinguishing types without runtime type information.

Use Cases​

  • Passing raw data via generic interfaces, data buffers, or IPC mechanisms
  • Uniquely identifying types in RTTI-less environments (e.g., embedded registries, plugin systems)
  • Wrapping and passing structs via components like LibXR::Topic