Implement fixed size options for rotgen containers

See merge request oss/rotgen!11
2025-07-20 20:23:51 +02:00 · 2025-07-20 20:23:51 +02:00 · 2084874b1b
commit 2084874b1b
parent 8e545dd51a
39 changed files with 1247 additions and 323 deletions
--- a/cmake/options.cmake
+++ b/cmake/options.cmake
@ -0,0 +1,106 @@
+##======================================================================================================================
+##  ROTGEN - Runtime Overlay for Eigen
+##  Copyright : CODE RECKONS
+##  SPDX-License-Identifier: BSL-1.0
+##======================================================================================================================
+
+function(assert_integer VAR_NAME)
+  if(DEFINED ${VAR_NAME} AND NOT ${${VAR_NAME}} STREQUAL "")
+    if(NOT ${${VAR_NAME}} MATCHES "^[0-9]+$")
+      message(FATAL_ERROR "[ROTGEN] - ${VAR_NAME} must be a non-negative integer, got '${${VAR_NAME}}'}")
+    endif()
+  endif()
+endfunction()
+
+function(check_force_dynamic_and_sizes FORCE_DYNAMIC_VAR MAX_SIZE_VAR)
+  if(${FORCE_DYNAMIC_VAR})
+    if(NOT ${MAX_SIZE_VAR} STREQUAL "")
+      message(FATAL_ERROR "[ROTGEN] - ROTGEN_FORCE_DYNAMIC is set, so ROTGEN_MAX_SIZE must not be defined.")
+    endif()
+  endif()
+endfunction()
+
+function(infer_force_dynamic FORCE_DYNAMIC_VAR MAX_SIZE_VAR OUT_FORCE_DYNAMIC_INFERRED)
+  set(${OUT_FORCE_DYNAMIC_INFERRED} OFF PARENT_SCOPE)
+
+  if(${FORCE_DYNAMIC_VAR})
+    if(NOT ${MAX_SIZE_VAR} STREQUAL "")
+      message(FATAL_ERROR "ROTGEN_FORCE_DYNAMIC cannot be used together with MAX_SIZE.")
+    endif()
+  elseif(${MAX_SIZE_VAR} STREQUAL "")
+    # None set, enable force_dynamic
+    set(${OUT_FORCE_DYNAMIC_INFERRED} ON PARENT_SCOPE)
+    set(${FORCE_DYNAMIC_VAR} ON PARENT_SCOPE)  # update caller variable!
+  endif()
+endfunction()
+
+function(build_compile_definitions FORCE_DYNAMIC_VAR MAX_SIZE_VAR OUT_DEFS)
+  set(defs "")
+  if(${FORCE_DYNAMIC_VAR})
+    list(APPEND defs "ROTGEN_FORCE_DYNAMIC")
+  else()
+    if(NOT ${MAX_SIZE_VAR} STREQUAL "")
+      list(APPEND defs "ROTGEN_MAX_SIZE=${${MAX_SIZE_VAR}}")
+    endif()
+  endif()
+  set(${OUT_DEFS} "${defs}" PARENT_SCOPE)
+endfunction()
+
+function(print_configuration_summary FORCE_DYNAMIC_VAR FORCE_CONFIG_REASON MAX_SIZE_VAR COMPILE_DEFS)
+  message(STATUS "==================== Rotgen Configuration Summary ====================")
+
+  if(DEFINED ROTGEN_DISABLE_EXPRESSION_TEMPLATES AND ROTGEN_DISABLE_EXPRESSION_TEMPLATES)
+    message(STATUS "  Configuration mode: DISABLE_EXPRESSION_TEMPLATES (overrides other settings)")
+  elseif(${FORCE_DYNAMIC_VAR})
+      message(STATUS "  Configuration mode: DYNAMIC")
+      if(${FORCE_CONFIG_REASON})
+        message(STATUS "  Reason          : No static size options were provided")
+      endif()
+  else()
+      message(STATUS "  Configuration mode: STATIC")
+  endif()
+
+  set(PREPROCESSOR_FLAGS "")
+  foreach(def IN LISTS COMPILE_DEFS)
+    string(APPEND PREPROCESSOR_FLAGS " -D${def}")
+  endforeach()
+  message(STATUS "  Preprocessor flags: ${PREPROCESSOR_FLAGS}")
+  message(STATUS "======================================================================")
+endfunction()
+
+function(handle_option OUT_DEFS)
+  # Early-out if disabling expression templates
+  if(NOT DEFINED ROTGEN_DISABLE_EXPRESSION_TEMPLATES)
+    set(ROTGEN_DISABLE_EXPRESSION_TEMPLATES OFF)
+  endif()
+  if(ROTGEN_DISABLE_EXPRESSION_TEMPLATES)
+    # Pass only the disable flag
+    set(${OUT_DEFS} "ROTGEN_DISABLE_EXPRESSION_TEMPLATES" PARENT_SCOPE)
+    message(STATUS "==================== Rotgen Configuration Summary ====================")
+    message(STATUS "  Configuration mode: DISABLE_EXPRESSION_TEMPLATES (overrides other settings)")
+    message(STATUS "  Preprocessor flags: -DROTGEN_DISABLE_EXPRESSION_TEMPLATES")
+    message(STATUS "======================================================================")
+    # Propagate to parent
+    set(ROTGEN_DISABLE_EXPRESSION_TEMPLATES ${ROTGEN_DISABLE_EXPRESSION_TEMPLATES} PARENT_SCOPE)
+    return()
+  endif()
+
+  # Defaults for other options
+  if(NOT DEFINED ROTGEN_FORCE_DYNAMIC)
+    set(ROTGEN_FORCE_DYNAMIC OFF)
+  endif()
+  if(NOT DEFINED ROTGEN_MAX_SIZE)
+    set(ROTGEN_MAX_SIZE "")
+  endif()
+
+  assert_integer("ROTGEN_MAX_SIZE")
+  check_force_dynamic_and_sizes("ROTGEN_FORCE_DYNAMIC" "ROTGEN_MAX_SIZE")
+  infer_force_dynamic("ROTGEN_FORCE_DYNAMIC" "ROTGEN_MAX_SIZE" _force_dynamic_inferred)
+
+  build_compile_definitions("ROTGEN_FORCE_DYNAMIC" "ROTGEN_MAX_SIZE" defs)
+  print_configuration_summary("ROTGEN_FORCE_DYNAMIC" "_force_dynamic_inferred" "ROTGEN_MAX_SIZE" "${defs}")
+
+  set(${OUT_DEFS}           "${defs}"               PARENT_SCOPE)
+  set(ROTGEN_FORCE_DYNAMIC  ${ROTGEN_FORCE_DYNAMIC} PARENT_SCOPE)
+  set(ROTGEN_MAX_SIZE       ${ROTGEN_MAX_SIZE}      PARENT_SCOPE)
+endfunction()