################################################################################################
# short alias for CMake logging
function(dmsg)
  message(STATUS "<<${ARGN}")
endfunction()

################################################################################################
# Command checking if current module has cuda souces to compile
macro(check_cuda var)
  file(GLOB cuda src/cuda/*.cu)
  list(LENGTH cuda ___size)  
  if (HAVE_CUDA AND ___size GREATER 0)  
    set(${var} ON)
  else()  
    set(${var} OFF) 
  endif()
  unset(___size)
  unset(cuda)
endmacro()

################################################################################################
# short command for adding library module
macro(warnings_disable)
  if(NOT ENABLE_NOISY_WARNINGS)
    set(_flag_vars "")
    set(_msvc_warnings "")
    set(_gxx_warnings "")
    foreach(arg ${ARGN})
      if(arg MATCHES "^CMAKE_")
        list(APPEND _flag_vars ${arg})
      elseif(arg MATCHES "^/wd")
        list(APPEND _msvc_warnings ${arg})
      elseif(arg MATCHES "^-W")
        list(APPEND _gxx_warnings ${arg})
      endif()
    endforeach()
    if(MSVC AND _msvc_warnings AND _flag_vars)
      foreach(var ${_flag_vars})
        foreach(warning ${_msvc_warnings})
          set(${var} "${${var}} ${warning}")
        endforeach()
      endforeach()
    elseif(CV_COMPILER_IS_GNU AND _gxx_warnings AND _flag_vars)
      foreach(var ${_flag_vars})
        foreach(warning ${_gxx_warnings})
          if(NOT warning MATCHES "^-Wno-")
            string(REPLACE "${warning}" "" ${var} "${${var}}")
            string(REPLACE "-W" "-Wno-" warning "${warning}")
          endif()
          ocv_check_flag_support(${var} "${warning}" _varname)
          if(${_varname})
            set(${var} "${${var}} ${warning}")
          endif()
        endforeach()
      endforeach()
    endif()
    unset(_flag_vars)
    unset(_msvc_warnings)
    unset(_gxx_warnings)
  endif(NOT ENABLE_NOISY_WARNINGS)
endmacro()

################################################################################################
# Command for asstion options with some preconditions
macro(kf_option variable description value)
  set(__value ${value})
  set(__condition "")
  set(__varname "__value")
  foreach(arg ${ARGN})
    if(arg STREQUAL "IF" OR arg STREQUAL "if")
      set(__varname "__condition")
    else()
      list(APPEND ${__varname} ${arg})
    endif()
  endforeach()
  unset(__varname)
  if("${__condition}" STREQUAL "")
    set(__condition 2 GREATER 1)
  endif()

  if(${__condition})
    if("${__value}" MATCHES ";")
      if(${__value})
        option(${variable} "${description}" ON)
      else()
        option(${variable} "${description}" OFF)
      endif()
    elseif(DEFINED ${__value})
      if(${__value})
        option(${variable} "${description}" ON)
      else()
        option(${variable} "${description}" OFF)
      endif()
    else()
      option(${variable} "${description}" ${__value})
    endif()
  else()
    unset(${variable} CACHE)
  endif()
  unset(__condition)
  unset(__value)
endmacro()