if(NOT DEFINED INPUT)
    message(FATAL_ERROR "INPUT is required")
endif()

if(NOT DEFINED OUTPUT)
    message(FATAL_ERROR "OUTPUT is required")
endif()

file(STRINGS "${INPUT}" OFFSET_LINES REGEX "->")

set(OFFSET_CONTENT "/* Generated by GenerateAsmOffsets.cmake. */\n")

foreach(LINE IN LISTS OFFSET_LINES)
    string(REGEX MATCH "->([A-Za-z0-9_]+)[^0-9-]*(-?[0-9]+)" _ "${LINE}")
    if(NOT CMAKE_MATCH_1)
        continue()
    endif()

    string(APPEND OFFSET_CONTENT "#define ${CMAKE_MATCH_1} ${CMAKE_MATCH_2}\n")
endforeach()

file(WRITE "${OUTPUT}" "${OFFSET_CONTENT}")