##

if(OCCT_MACROS_ALREADY_INCLUDED)
  return()
endif()
set(OCCT_MACROS_ALREADY_INCLUDED 1)


macro (OCCT_CHECK_AND_UNSET VARNAME)
  if (DEFINED ${VARNAME})
    unset (${VARNAME} CACHE)
  endif()
endmacro()

macro (OCCT_CHECK_AND_UNSET_GROUP VARNAME)
  OCCT_CHECK_AND_UNSET ("${VARNAME}_DIR")

  OCCT_CHECK_AND_UNSET ("${VARNAME}_INCLUDE_DIR")

  OCCT_CHECK_AND_UNSET ("${VARNAME}_LIBRARY")
  OCCT_CHECK_AND_UNSET ("${VARNAME}_LIBRARY_DIR")

  if (WIN32)
    OCCT_CHECK_AND_UNSET ("${VARNAME}_DLL")
    OCCT_CHECK_AND_UNSET ("${VARNAME}_DLL_DIR")
  endif()
endmacro()

macro (OCCT_CHECK_AND_UNSET_INSTALL_DIR_SUBDIRS)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_BIN)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_SCRIPT)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_LIB)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_INCLUDE)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_RESOURCE)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_DATA)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_SAMPLES)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_TESTS)
  OCCT_CHECK_AND_UNSET (INSTALL_DIR_DOC)
endmacro()

# COMPILER_BITNESS variable
macro (OCCT_MAKE_COMPILER_BITNESS)
  math (EXPR COMPILER_BITNESS "32 + 32*(${CMAKE_SIZEOF_VOID_P}/8)")
endmacro()

# OS_WITH_BIT
macro (OCCT_MAKE_OS_WITH_BITNESS)

  OCCT_MAKE_COMPILER_BITNESS()

  if (WIN32)
    set (OS_WITH_BIT "win${COMPILER_BITNESS}")
  elseif(APPLE)
    set (OS_WITH_BIT "mac${COMPILER_BITNESS}")
  else()
    set (OS_WITH_BIT "lin${COMPILER_BITNESS}")
  endif()
endmacro()

# COMPILER variable
macro (OCCT_MAKE_COMPILER_SHORT_NAME)
  if (MSVC)
    if ((MSVC_VERSION EQUAL 1300) OR (MSVC_VERSION EQUAL 1310))
      set (COMPILER vc7)
    elseif (MSVC_VERSION EQUAL 1400)
      set (COMPILER vc8)
    elseif (MSVC_VERSION EQUAL 1500)
      set (COMPILER vc9)
    elseif (MSVC_VERSION EQUAL 1600)
      set (COMPILER vc10)
    elseif (MSVC_VERSION EQUAL 1700)
      set (COMPILER vc11)
    elseif (MSVC_VERSION EQUAL 1800)
      set (COMPILER vc12)
    elseif (MSVC_VERSION EQUAL 1900)
      set (COMPILER vc14)
    elseif ((MSVC_VERSION GREATER 1900) AND (MSVC_VERSION LESS 2000))
      # Since Visual Studio 15 (2017), its version diverged from version of
      # compiler which is 14.1; as that compiler uses the same run-time as 14.0,
      # we keep its id as "vc14" to be compatibille
      set (COMPILER vc14)
    else()
      message (FATAL_ERROR "Unrecognized MSVC_VERSION")
    endif()
  elseif (DEFINED CMAKE_COMPILER_IS_GNUCC)
    set (COMPILER gcc)
  elseif (DEFINED CMAKE_COMPILER_IS_GNUCXX)
    set (COMPILER gxx)
  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
    set (COMPILER clang)
  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
    set (COMPILER icc)
  else()
    set (COMPILER ${CMAKE_GENERATOR})
    string (REGEX REPLACE " " "" COMPILER ${COMPILER})
  endif()
endmacro()

function (SUBDIRECTORY_NAMES MAIN_DIRECTORY RESULT)
  file (GLOB SUB_ITEMS "${MAIN_DIRECTORY}/*")

  foreach (ITEM ${SUB_ITEMS})
    if (IS_DIRECTORY "${ITEM}")
      get_filename_component (ITEM_NAME "${ITEM}" NAME)
      list (APPEND LOCAL_RESULT "${ITEM_NAME}")
    endif()
  endforeach()
  set (${RESULT} ${LOCAL_RESULT} PARENT_SCOPE)
endfunction()

function (FIND_SUBDIRECTORY ROOT_DIRECTORY DIRECTORY_SUFFIX SUBDIRECTORY_NAME)
  #message("Trying to find directory with suffix ${DIRECTORY_SUFFIX} in ${ROOT_DIRECTORY}")
  SUBDIRECTORY_NAMES ("${ROOT_DIRECTORY}" SUBDIR_NAME_LIST)
  #message("Subdirectories: ${SUBDIR_NAME_LIST}")

  #set(${SUBDIRECTORY_NAME} "${SUBDIR_NAME_LIST}" PARENT_SCOPE)

  foreach (SUBDIR_NAME ${SUBDIR_NAME_LIST})
    #message("Subdir: ${SUBDIR_NAME}, ${DIRECTORY_SUFFIX}")
    # REGEX failed if the directory name contains '++' combination, so we replace it
    string(REPLACE "+" "\\+" SUBDIR_NAME_ESCAPED ${SUBDIR_NAME})
    string (REGEX MATCH "${SUBDIR_NAME_ESCAPED}" DOES_PATH_CONTAIN "${DIRECTORY_SUFFIX}")
    if (DOES_PATH_CONTAIN)
      set(${SUBDIRECTORY_NAME} "${ROOT_DIRECTORY}/${SUBDIR_NAME}" PARENT_SCOPE)
      #message("Subdirectory is found: ${SUBDIRECTORY_NAME}")
      BREAK()
    else()
      #message("Check directory: ${ROOT_DIRECTORY}/${SUBDIR_NAME}")
      FIND_SUBDIRECTORY ("${ROOT_DIRECTORY}/${SUBDIR_NAME}" "${DIRECTORY_SUFFIX}" SUBDIR_REC_NAME)
      if (NOT "${SUBDIR_REC_NAME}" STREQUAL "")
        set(${SUBDIRECTORY_NAME} "${SUBDIR_REC_NAME}" PARENT_SCOPE)
        #message("Subdirectory is found: ${SUBDIRECTORY_NAME}")
        BREAK()
      endif()
    endif()
  endforeach()
endfunction()

function (OCCT_ORIGIN_AND_PATCHED_FILES RELATIVE_PATH SEARCH_TEMPLATE RESULT)

  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/${RELATIVE_PATH}")
    file (GLOB FOUND_FILES "${BUILD_PATCH}/${RELATIVE_PATH}/${SEARCH_TEMPLATE}")
  endif()

  file (GLOB ORIGIN_FILES "${CMAKE_SOURCE_DIR}/${RELATIVE_PATH}/${SEARCH_TEMPLATE}")
  foreach (ORIGIN_FILE ${ORIGIN_FILES})
    # check for existence of patched version of current file
    if (NOT BUILD_PATCH OR NOT EXISTS "${BUILD_PATCH}/${RELATIVE_PATH}")
      list (APPEND FOUND_FILES ${ORIGIN_FILE})
    else()
      get_filename_component (ORIGIN_FILE_NAME "${ORIGIN_FILE}" NAME)
      if (NOT EXISTS "${BUILD_PATCH}/${RELATIVE_PATH}/${ORIGIN_FILE_NAME}")
        list (APPEND FOUND_FILES ${ORIGIN_FILE})
      endif()
    endif()
  endforeach()

  set (${RESULT} ${FOUND_FILES} PARENT_SCOPE)
endfunction()

function (FIND_PRODUCT_DIR ROOT_DIR PRODUCT_NAME RESULT)
  OCCT_MAKE_COMPILER_SHORT_NAME()
  OCCT_MAKE_COMPILER_BITNESS()

  string (TOLOWER "${PRODUCT_NAME}" lower_PRODUCT_NAME)

  list (APPEND SEARCH_TEMPLATES "^[^a-zA-Z]*${lower_PRODUCT_NAME}[^a-zA-Z]*${COMPILER}.*${COMPILER_BITNESS}")
  list (APPEND SEARCH_TEMPLATES "^[^a-zA-Z]*${lower_PRODUCT_NAME}[^a-zA-Z]*[0-9.]+.*${COMPILER}.*${COMPILER_BITNESS}")
  list (APPEND SEARCH_TEMPLATES "^[^a-zA-Z]*${lower_PRODUCT_NAME}[^a-zA-Z]*[0-9.]+.*${COMPILER_BITNESS}")
  list (APPEND SEARCH_TEMPLATES "^[^a-zA-Z]*${lower_PRODUCT_NAME}[^a-zA-Z]*.*${COMPILER_BITNESS}")
  list (APPEND SEARCH_TEMPLATES "^[^a-zA-Z]*${lower_PRODUCT_NAME}[^a-zA-Z]*[0-9.]+")
  list (APPEND SEARCH_TEMPLATES "^[^a-zA-Z]*${lower_PRODUCT_NAME}[^a-zA-Z]*")

  SUBDIRECTORY_NAMES ("${ROOT_DIR}" SUBDIR_NAME_LIST)

  foreach (SEARCH_TEMPLATE ${SEARCH_TEMPLATES})
    if (LOCAL_RESULT)
      BREAK()
    endif()

    foreach (SUBDIR_NAME ${SUBDIR_NAME_LIST})
      string (TOLOWER "${SUBDIR_NAME}" lower_SUBDIR_NAME)

      string (REGEX MATCH "${SEARCH_TEMPLATE}" DUMMY_VAR "${lower_SUBDIR_NAME}")
      if (DUMMY_VAR)
        list (APPEND LOCAL_RESULT ${SUBDIR_NAME})
      endif()
    endforeach()
  endforeach()

  if (LOCAL_RESULT)
    list (GET LOCAL_RESULT -1 DUMMY)
    set (${RESULT} ${DUMMY} PARENT_SCOPE)
  endif()
endfunction()

macro (OCCT_INSTALL_FILE_OR_DIR BEING_INSTALLED_OBJECT DESTINATION_PATH)
  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/${BEING_INSTALLED_OBJECT}")
    if (IS_DIRECTORY "${BUILD_PATCH}/${BEING_INSTALLED_OBJECT}")
      # first of all, install original files
      install (DIRECTORY "${CMAKE_SOURCE_DIR}/${BEING_INSTALLED_OBJECT}" DESTINATION  "${DESTINATION_PATH}")

      # secondly, rewrite original files with patched ones
      install (DIRECTORY "${BUILD_PATCH}/${BEING_INSTALLED_OBJECT}" DESTINATION  "${DESTINATION_PATH}")
    else()
      install (FILES     "${BUILD_PATCH}/${BEING_INSTALLED_OBJECT}" DESTINATION  "${DESTINATION_PATH}")
    endif()
  else()
    if (IS_DIRECTORY "${CMAKE_SOURCE_DIR}/${BEING_INSTALLED_OBJECT}")
      install (DIRECTORY "${CMAKE_SOURCE_DIR}/${BEING_INSTALLED_OBJECT}" DESTINATION  "${DESTINATION_PATH}")
    else()
      install (FILES     "${CMAKE_SOURCE_DIR}/${BEING_INSTALLED_OBJECT}" DESTINATION  "${DESTINATION_PATH}")
    endif()
  endif()
endmacro()

macro (OCCT_CONFIGURE_AND_INSTALL BEING_CONGIRUGED_FILE BUILD_NAME INSTALL_NAME DESTINATION_PATH)
  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/${BEING_CONGIRUGED_FILE}")
    configure_file("${BUILD_PATCH}/${BEING_CONGIRUGED_FILE}" "${BUILD_NAME}" @ONLY)
  else()
    configure_file("${CMAKE_SOURCE_DIR}/${BEING_CONGIRUGED_FILE}" "${BUILD_NAME}" @ONLY)
  endif()

  install(FILES "${OCCT_BINARY_DIR}/${BUILD_NAME}" DESTINATION  "${DESTINATION_PATH}" RENAME ${INSTALL_NAME})
endmacro()

macro (COLLECT_AND_INSTALL_OCCT_HEADER_FILES ROOT_TARGET_OCCT_DIR OCCT_BUILD_TOOLKITS OCCT_COLLECT_SOURCE_DIR OCCT_INSTALL_DIR_PREFIX)
  set (OCCT_USED_PACKAGES)

  # consider patched header.in template
  set (TEMPLATE_HEADER_PATH "${CMAKE_SOURCE_DIR}/adm/templates/header.in")
  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/adm/templates/header.in")
    set (TEMPLATE_HEADER_PATH "${BUILD_PATCH}/adm/templates/header.in")
  endif()

  set (ROOT_OCCT_DIR ${CMAKE_SOURCE_DIR})

  foreach (OCCT_USED_TOOLKIT ${OCCT_BUILD_TOOLKITS})
    # append all required package folders
    set (OCCT_TOOLKIT_PACKAGES)
    if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/src/${OCCT_USED_TOOLKIT}/PACKAGES")
      file (STRINGS "${BUILD_PATCH}/src/${OCCT_USED_TOOLKIT}/PACKAGES" OCCT_TOOLKIT_PACKAGES)
    elseif (EXISTS "${OCCT_COLLECT_SOURCE_DIR}/${OCCT_USED_TOOLKIT}/PACKAGES")
      file (STRINGS "${OCCT_COLLECT_SOURCE_DIR}/${OCCT_USED_TOOLKIT}/PACKAGES" OCCT_TOOLKIT_PACKAGES)
    endif()

    list (APPEND OCCT_USED_PACKAGES ${OCCT_TOOLKIT_PACKAGES})
  endforeach()

  list (REMOVE_DUPLICATES OCCT_USED_PACKAGES)

  set (OCCT_HEADER_FILES_COMPLETE)
  set (OCCT_HEADER_FILE_NAMES_NOT_IN_FILES)
  set (OCCT_HEADER_FILE_WITH_PROPER_NAMES)

  string(TIMESTAMP CURRENT_TIME "%H:%M:%S")
  message (STATUS "Info: \(${CURRENT_TIME}\) Compare FILES with files in package directories...")

  foreach (OCCT_PACKAGE ${OCCT_USED_PACKAGES})
    if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/src/${OCCT_PACKAGE}/FILES")
      file (STRINGS "${BUILD_PATCH}/src/${OCCT_PACKAGE}/FILES" OCCT_ALL_FILE_NAMES)
    elseif (EXISTS "${OCCT_COLLECT_SOURCE_DIR}/${OCCT_PACKAGE}/FILES")
      file (STRINGS "${OCCT_COLLECT_SOURCE_DIR}/${OCCT_PACKAGE}/FILES" OCCT_ALL_FILE_NAMES)
    else()
      message (WARNING "FILES has not been found in ${OCCT_COLLECT_SOURCE_DIR}/${OCCT_PACKAGE}")
      continue()
    endif()

    list (LENGTH OCCT_ALL_FILE_NAMES ALL_FILES_NB)
    math (EXPR ALL_FILES_NB "${ALL_FILES_NB} - 1" )

    # emit warnings if there is unprocessed headers
    file (GLOB OCCT_ALL_FILES_IN_DIR "${OCCT_COLLECT_SOURCE_DIR}/${OCCT_PACKAGE}/*.*")
    file (GLOB OCCT_ALL_FILES_IN_PATCH_DIR "${BUILD_PATCH}/src/${OCCT_PACKAGE}/*.*")

    # use patched header files
    foreach (OCCT_FILE_IN_PATCH_DIR ${OCCT_ALL_FILES_IN_PATCH_DIR})
      get_filename_component (OCCT_FILE_IN_PATCH_DIR_NAME ${OCCT_FILE_IN_PATCH_DIR} NAME)
      list (REMOVE_ITEM OCCT_ALL_FILES_IN_DIR "${OCCT_COLLECT_SOURCE_DIR}/${OCCT_PACKAGE}/${OCCT_FILE_IN_PATCH_DIR_NAME}")
      list (APPEND OCCT_ALL_FILES_IN_DIR "${OCCT_FILE_IN_PATCH_DIR}")
    endforeach()

    foreach (OCCT_FILE_IN_DIR ${OCCT_ALL_FILES_IN_DIR})
      get_filename_component (OCCT_FILE_IN_DIR_NAME ${OCCT_FILE_IN_DIR} NAME)

      set (OCCT_FILE_IN_DIR_STATUS OFF)

      if (${ALL_FILES_NB} LESS 0)
        break()
      endif()

      foreach (FILE_INDEX RANGE ${ALL_FILES_NB})
        list (GET OCCT_ALL_FILE_NAMES ${FILE_INDEX} OCCT_FILE_NAME)

        string (REGEX REPLACE "[^:]+:+" "" OCCT_FILE_NAME "${OCCT_FILE_NAME}")

        if ("${OCCT_FILE_IN_DIR_NAME}" STREQUAL "${OCCT_FILE_NAME}")
          set (OCCT_FILE_IN_DIR_STATUS ON)

          string (REGEX MATCH ".+\\.[hlg]xx|.+\\.h$" IS_HEADER_FOUND "${OCCT_FILE_NAME}")
          if (IS_HEADER_FOUND)
            list (APPEND OCCT_HEADER_FILES_COMPLETE ${OCCT_FILE_IN_DIR})

            # collect header files with name that does not contain its package one
            string (FIND "${OCCT_FILE_NAME}" "${OCCT_PACKAGE}_" FOUND_INDEX)
            if (NOT ${FOUND_INDEX} EQUAL 0)
              list (APPEND OCCT_HEADER_FILE_WITH_PROPER_NAMES "${OCCT_FILE_NAME}")
            endif()
          endif()

          # remove found element from list
          list (REMOVE_AT OCCT_ALL_FILE_NAMES ${FILE_INDEX})
          math (EXPR ALL_FILES_NB "${ALL_FILES_NB} - 1" ) # decrement number

          break()
        endif()
      endforeach()

      if (NOT OCCT_FILE_IN_DIR_STATUS)
        message (STATUS "Warning. File ${OCCT_FILE_IN_DIR} is not listed in ${OCCT_COLLECT_SOURCE_DIR}/${OCCT_PACKAGE}/FILES")

        string (REGEX MATCH ".+\\.[hlg]xx|.+\\.h$" IS_HEADER_FOUND "${OCCT_FILE_NAME}")
        if (IS_HEADER_FOUND)
          list (APPEND OCCT_HEADER_FILE_NAMES_NOT_IN_FILES ${OCCT_FILE_NAME})
        endif()
      endif()
    endforeach()
  endforeach()
  
  # create new file including found header
  string(TIMESTAMP CURRENT_TIME "%H:%M:%S")
  message (STATUS "Info: \(${CURRENT_TIME}\) Create header-links in inc folder...")

  foreach (OCCT_HEADER_FILE ${OCCT_HEADER_FILES_COMPLETE})
    get_filename_component (HEADER_FILE_NAME ${OCCT_HEADER_FILE} NAME)
    set (OCCT_HEADER_FILE_CONTENT "#include \"${OCCT_HEADER_FILE}\"")
    configure_file ("${TEMPLATE_HEADER_PATH}" "${ROOT_TARGET_OCCT_DIR}/${OCCT_INSTALL_DIR_PREFIX}/${HEADER_FILE_NAME}" @ONLY)
  endforeach()
  
  install (FILES ${OCCT_HEADER_FILES_COMPLETE} DESTINATION "${INSTALL_DIR}/${OCCT_INSTALL_DIR_PREFIX}")
  
  string(TIMESTAMP CURRENT_TIME "%H:%M:%S")
  message (STATUS "Info: \(${CURRENT_TIME}\) Checking headers in inc folder...")
    
  file (GLOB OCCT_HEADER_FILES_OLD "${ROOT_TARGET_OCCT_DIR}/${OCCT_INSTALL_DIR_PREFIX}/*")
  foreach (OCCT_HEADER_FILE_OLD ${OCCT_HEADER_FILES_OLD})
    get_filename_component (HEADER_FILE_NAME ${OCCT_HEADER_FILE_OLD} NAME)
    string (REGEX MATCH "^[a-zA-Z0-9]+" PACKAGE_NAME "${HEADER_FILE_NAME}")
    
    list (FIND OCCT_USED_PACKAGES ${PACKAGE_NAME} IS_HEADER_FOUND)
    if (NOT ${IS_HEADER_FOUND} EQUAL -1)
      if (NOT EXISTS "${OCCT_COLLECT_SOURCE_DIR}/${PACKAGE_NAME}/${HEADER_FILE_NAME}")
        message (STATUS "Warning. ${OCCT_HEADER_FILE_OLD} is not presented in the sources and will be removed from ${ROOT_TARGET_OCCT_DIR}/inc")
        file (REMOVE "${OCCT_HEADER_FILE_OLD}")
      else()
        list (FIND OCCT_HEADER_FILE_NAMES_NOT_IN_FILES ${PACKAGE_NAME} IS_HEADER_FOUND)
        if (NOT ${IS_HEADER_FOUND} EQUAL -1)
          message (STATUS "Warning. ${OCCT_HEADER_FILE_OLD} is presented in the sources but not involved in FILES and will be removed from ${ROOT_TARGET_OCCT_DIR}/inc")
          file (REMOVE "${OCCT_HEADER_FILE_OLD}")
        endif()
      endif()
    else()
      set (IS_HEADER_FOUND -1)
      if (NOT "${OCCT_HEADER_FILE_WITH_PROPER_NAMES}" STREQUAL "")
        list (FIND OCCT_HEADER_FILE_WITH_PROPER_NAMES ${HEADER_FILE_NAME} IS_HEADER_FOUND)
      endif()
      
      if (${IS_HEADER_FOUND} EQUAL -1)
        message (STATUS "Warning. \(${PACKAGE_NAME}\) ${OCCT_HEADER_FILE_OLD} is not used and will be removed from ${ROOT_TARGET_OCCT_DIR}/inc")
        file (REMOVE "${OCCT_HEADER_FILE_OLD}")
      endif()
    endif()
  endforeach()
endmacro()

macro (OCCT_COPY_FILE_OR_DIR BEING_COPIED_OBJECT DESTINATION_PATH)
  # first of all, copy original files
  if (EXISTS "${CMAKE_SOURCE_DIR}/${BEING_COPIED_OBJECT}")
    file (COPY "${CMAKE_SOURCE_DIR}/${BEING_COPIED_OBJECT}" DESTINATION  "${DESTINATION_PATH}")
  endif()

  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/${BEING_COPIED_OBJECT}")
    # secondly, rewrite original files with patched ones
    file (COPY "${BUILD_PATCH}/${BEING_COPIED_OBJECT}" DESTINATION  "${DESTINATION_PATH}")
  endif()
endmacro()

macro (OCCT_CONFIGURE BEING_CONGIRUGED_FILE FINAL_NAME)
  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/${BEING_CONGIRUGED_FILE}")
    configure_file("${BUILD_PATCH}/${BEING_CONGIRUGED_FILE}" "${FINAL_NAME}" @ONLY)
  else()
    configure_file("${CMAKE_SOURCE_DIR}/${BEING_CONGIRUGED_FILE}" "${FINAL_NAME}" @ONLY)
  endif()
endmacro()

macro (OCCT_ADD_SUBDIRECTORY BEING_ADDED_DIRECTORY)
  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/${BEING_ADDED_DIRECTORY}/CMakeLists.txt")
    add_subdirectory(${BUILD_PATCH}/${BEING_ADDED_DIRECTORY})
  elseif (EXISTS "${CMAKE_SOURCE_DIR}/${BEING_ADDED_DIRECTORY}/CMakeLists.txt")
    add_subdirectory (${CMAKE_SOURCE_DIR}/${BEING_ADDED_DIRECTORY})
  else()
    message (STATUS "${BEING_ADDED_DIRECTORY} directory is not included")
  endif()
endmacro()

function (OCCT_IS_PRODUCT_REQUIRED CSF_VAR_NAME USE_PRODUCT)
  set (${USE_PRODUCT} OFF PARENT_SCOPE)

  if (NOT BUILD_TOOLKITS)
    message(STATUS "Warning: the list of being used toolkits is empty")
  else()
    foreach (USED_TOOLKIT ${BUILD_TOOLKITS})
      if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/src/${USED_TOOLKIT}/EXTERNLIB")
        file (READ "${BUILD_PATCH}/src/${USED_TOOLKIT}/EXTERNLIB" FILE_CONTENT)
      elseif (EXISTS "${CMAKE_SOURCE_DIR}/src/${USED_TOOLKIT}/EXTERNLIB")
        file (READ "${CMAKE_SOURCE_DIR}/src/${USED_TOOLKIT}/EXTERNLIB" FILE_CONTENT)
      endif()

      string (REGEX MATCH "${CSF_VAR_NAME}" DOES_FILE_CONTAIN "${FILE_CONTENT}")

      if (DOES_FILE_CONTAIN)
        set (${USE_PRODUCT} ON PARENT_SCOPE)
        break()
      endif()
    endforeach()
  endif()
endfunction()

function (FILE_TO_LIST FILE_NAME FILE_CONTENT)
  set (LOCAL_FILE_CONTENT)
  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/${FILE_NAME}")
    file (STRINGS "${BUILD_PATCH}/${FILE_NAME}" LOCAL_FILE_CONTENT)
  elseif (EXISTS "${CMAKE_SOURCE_DIR}/${FILE_NAME}")
    file (STRINGS "${CMAKE_SOURCE_DIR}/${FILE_NAME}" LOCAL_FILE_CONTENT)
  endif()

  set (${FILE_CONTENT} ${LOCAL_FILE_CONTENT} PARENT_SCOPE)
endfunction()

# Function to determine if TOOLKIT is OCCT toolkit
function (IS_OCCT_TOOLKIT TOOLKIT_NAME MODULES IS_TOOLKIT_FOUND)
  set (${IS_TOOLKIT_FOUND} OFF PARENT_SCOPE)
  foreach (MODULE ${${MODULES}})
    set (TOOLKITS ${${MODULE}_TOOLKITS})
    list (FIND TOOLKITS ${TOOLKIT_NAME} FOUND)

    if (NOT ${FOUND} EQUAL -1)
      set (${IS_TOOLKIT_FOUND} ON PARENT_SCOPE)
    endif()
  endforeach(MODULE)
endfunction()

# TOOLKIT_DEPS is defined with dependencies from file src/TOOLKIT_NAME/EXTERNLIB.
# CSF_ variables are ignored
function (OCCT_TOOLKIT_DEP TOOLKIT_NAME TOOLKIT_DEPS)
  FILE_TO_LIST ("src/${TOOLKIT_NAME}/EXTERNLIB" FILE_CONTENT)

  #list (APPEND LOCAL_TOOLKIT_DEPS ${TOOLKIT_NAME})
  set (LOCAL_TOOLKIT_DEPS)
  foreach (FILE_CONTENT_LINE ${FILE_CONTENT})
    string (REGEX MATCH "^TK" TK_FOUND ${FILE_CONTENT_LINE})
    if ("x${FILE_CONTENT_LINE}" STREQUAL "xDRAWEXE" OR NOT "${TK_FOUND}" STREQUAL "")
      list (APPEND LOCAL_TOOLKIT_DEPS ${FILE_CONTENT_LINE})
    endif()
  endforeach()

  set (${TOOLKIT_DEPS} ${LOCAL_TOOLKIT_DEPS} PARENT_SCOPE)
endfunction()

# TOOLKIT_FULL_DEPS is defined with complete dependencies (all levels)
function (OCCT_TOOLKIT_FULL_DEP TOOLKIT_NAME TOOLKIT_FULL_DEPS)
  # first level dependencies are stored in LOCAL_TOOLKIT_FULL_DEPS
  OCCT_TOOLKIT_DEP (${TOOLKIT_NAME} LOCAL_TOOLKIT_FULL_DEPS)

  list (LENGTH LOCAL_TOOLKIT_FULL_DEPS LIST_LENGTH)
  set (LIST_INDEX 0)
  while (LIST_INDEX LESS LIST_LENGTH)
    list (GET LOCAL_TOOLKIT_FULL_DEPS ${LIST_INDEX} CURRENT_TOOLKIT)
    OCCT_TOOLKIT_DEP (${CURRENT_TOOLKIT} CURRENT_TOOLKIT_DEPS)

    # append toolkits are not contained
    foreach (CURRENT_TOOLKIT_DEP ${CURRENT_TOOLKIT_DEPS})
      set (CURRENT_TOOLKIT_DEP_FOUND OFF)
      foreach (LOCAL_TOOLKIT_FULL_DEP ${LOCAL_TOOLKIT_FULL_DEPS})
        if ("${CURRENT_TOOLKIT_DEP}" STREQUAL "${LOCAL_TOOLKIT_FULL_DEP}")
          set (CURRENT_TOOLKIT_DEP_FOUND ON)
          break()
        endif()
      endforeach()
      if ("${CURRENT_TOOLKIT_DEP_FOUND}" STREQUAL "OFF")
        list (APPEND LOCAL_TOOLKIT_FULL_DEPS ${CURRENT_TOOLKIT_DEP})
      endif()
    endforeach()

    # increment the list index
    MATH(EXPR LIST_INDEX "${LIST_INDEX}+1")

    # calculate new length
    list (LENGTH LOCAL_TOOLKIT_FULL_DEPS LIST_LENGTH)
  endwhile()

  set (${TOOLKIT_FULL_DEPS} ${LOCAL_TOOLKIT_FULL_DEPS} PARENT_SCOPE)
endfunction()

# Function to get list of modules/toolkits/samples from file adm/${FILE_NAME}.
# Creates list <$MODULE_LIST> to store list of MODULES and
# <NAME_OF_MODULE>_TOOLKITS foreach module to store its toolkits, where "TOOLKITS" is defined by TOOLKITS_NAME_SUFFIX.
function (OCCT_MODULES_AND_TOOLKITS FILE_NAME TOOLKITS_NAME_SUFFIX MODULE_LIST)
  FILE_TO_LIST ("adm/${FILE_NAME}" FILE_CONTENT)

  foreach (CONTENT_LINE ${FILE_CONTENT})
    string (REPLACE " " ";" CONTENT_LINE ${CONTENT_LINE})
    list (GET CONTENT_LINE 0 MODULE_NAME)
    list (REMOVE_AT CONTENT_LINE 0)
    list (APPEND ${MODULE_LIST} ${MODULE_NAME})
    # (!) REMOVE THE LINE BELOW (implicit variables)
    set (${MODULE_NAME}_${TOOLKITS_NAME_SUFFIX} ${CONTENT_LINE} PARENT_SCOPE)
  endforeach()

  set (${MODULE_LIST} ${${MODULE_LIST}} PARENT_SCOPE)
endfunction()

# Returns OCC version string from file Standard_Version.hxx (if available)
function (OCC_VERSION OCC_VERSION_MAJOR OCC_VERSION_MINOR OCC_VERSION_MAINTENANCE OCC_VERSION_DEVELOPMENT OCC_VERSION_STRING_EXT)

  set (OCC_VERSION_MAJOR         7)
  set (OCC_VERSION_MINOR         0)
  set (OCC_VERSION_MAINTENANCE   0)
  set (OCC_VERSION_DEVELOPMENT   dev)
  set (OCC_VERSION_COMPLETE      "7.0.0")
 
  set (STANDARD_VERSION_FILE "${CMAKE_SOURCE_DIR}/src/Standard/Standard_Version.hxx")
  if (BUILD_PATCH AND EXISTS "${BUILD_PATCH}/src/Standard/Standard_Version.hxx")
    set (STANDARD_VERSION_FILE "${BUILD_PATCH}/src/Standard/Standard_Version.hxx")
  endif()

  if (EXISTS "${STANDARD_VERSION_FILE}")
    foreach (SOUGHT_VERSION OCC_VERSION_MAJOR OCC_VERSION_MINOR OCC_VERSION_MAINTENANCE)
      file (STRINGS "${STANDARD_VERSION_FILE}" ${SOUGHT_VERSION} REGEX "^#define ${SOUGHT_VERSION} .*")
      string (REGEX REPLACE ".*${SOUGHT_VERSION} .*([^ ]+).*" "\\1" ${SOUGHT_VERSION} "${${SOUGHT_VERSION}}" )
    endforeach()
    
    foreach (SOUGHT_VERSION OCC_VERSION_DEVELOPMENT OCC_VERSION_COMPLETE)
      file (STRINGS "${STANDARD_VERSION_FILE}" ${SOUGHT_VERSION} REGEX "^#define ${SOUGHT_VERSION} .*")
      string (REGEX REPLACE ".*${SOUGHT_VERSION} .*\"([^ ]+)\".*" "\\1" ${SOUGHT_VERSION} "${${SOUGHT_VERSION}}" )
    endforeach()
  endif()
 
  set (OCC_VERSION_MAJOR "${OCC_VERSION_MAJOR}" PARENT_SCOPE)
  set (OCC_VERSION_MINOR "${OCC_VERSION_MINOR}" PARENT_SCOPE)
  set (OCC_VERSION_MAINTENANCE "${OCC_VERSION_MAINTENANCE}" PARENT_SCOPE)
  set (OCC_VERSION_DEVELOPMENT "${OCC_VERSION_DEVELOPMENT}" PARENT_SCOPE)
  
  if (OCC_VERSION_DEVELOPMENT AND OCC_VERSION_COMPLETE)
    set (OCC_VERSION_STRING_EXT "${OCC_VERSION_COMPLETE}.${OCC_VERSION_DEVELOPMENT}" PARENT_SCOPE)
  else()
    set (OCC_VERSION_STRING_EXT "${OCC_VERSION_COMPLETE}" PARENT_SCOPE)
  endif()
endfunction()

macro (CHECK_PATH_FOR_CONSISTENCY THE_ROOT_PATH_NAME THE_BEING_CHECKED_PATH_NAME THE_VAR_TYPE THE_MESSAGE_OF_BEING_CHECKED_PATH)
  
  set (THE_ROOT_PATH "${${THE_ROOT_PATH_NAME}}")
  set (THE_BEING_CHECKED_PATH "${${THE_BEING_CHECKED_PATH_NAME}}")

  if (THE_BEING_CHECKED_PATH OR EXISTS "${THE_BEING_CHECKED_PATH}")
    get_filename_component (THE_ROOT_PATH_ABS "${THE_ROOT_PATH}" ABSOLUTE)
    get_filename_component (THE_BEING_CHECKED_PATH_ABS "${THE_BEING_CHECKED_PATH}" ABSOLUTE)

    string (REGEX MATCH "${THE_ROOT_PATH_ABS}" DOES_PATH_CONTAIN "${THE_BEING_CHECKED_PATH_ABS}")

    if (NOT DOES_PATH_CONTAIN) # if cmake found the being checked path at different place from THE_ROOT_PATH_ABS
      set (${THE_BEING_CHECKED_PATH_NAME} "" CACHE ${THE_VAR_TYPE} "${THE_MESSAGE_OF_BEING_CHECKED_PATH}" FORCE)
    endif()
  else()
    set (${THE_BEING_CHECKED_PATH_NAME} "" CACHE ${THE_VAR_TYPE} "${THE_MESSAGE_OF_BEING_CHECKED_PATH}" FORCE)
  endif()

endmacro()

# Adds OCCT_INSTALL_BIN_LETTER variable ("" for Release, "d" for Debug and 
# "i" for RelWithDebInfo) in OpenCASCADETargets-*.cmake files during 
# installation process.
# This and the following macros are used to overcome limitation of CMake
# prior to version 3.3 not supporting per-configuration install paths
# for install target files (see https://cmake.org/Bug/view.php?id=14317)
macro (OCCT_UPDATE_TARGET_FILE)
  if (MSVC)
    OCCT_INSERT_CODE_FOR_TARGET ()
  endif()

  install (CODE
  "cmake_policy(PUSH)
  cmake_policy(SET CMP0007 NEW)
  string (TOLOWER \"\${CMAKE_INSTALL_CONFIG_NAME}\" CMAKE_INSTALL_CONFIG_NAME_LOWERCASE)
  file (GLOB ALL_OCCT_TARGET_FILES \"\$ENV{DESTDIR}${INSTALL_DIR}/${INSTALL_DIR_CMAKE}/OpenCASCADE*Targets-\${CMAKE_INSTALL_CONFIG_NAME_LOWERCASE}.cmake\")
  foreach(TARGET_FILENAME \${ALL_OCCT_TARGET_FILES})
    file (STRINGS \"\${TARGET_FILENAME}\" TARGET_FILE_CONTENT)
    file (REMOVE \"\${TARGET_FILENAME}\")
    foreach (line IN LISTS TARGET_FILE_CONTENT)
      string (REGEX REPLACE \"[\\\\]?[\\\$]{OCCT_INSTALL_BIN_LETTER}\" \"\${OCCT_INSTALL_BIN_LETTER}\" line \"\${line}\")
      file (APPEND \"\${TARGET_FILENAME}\" \"\${line}\\n\")
    endforeach()
  endforeach()
  cmake_policy(POP)")
endmacro()

macro (OCCT_INSERT_CODE_FOR_TARGET)
  install(CODE "if (\"\${CMAKE_INSTALL_CONFIG_NAME}\" MATCHES \"^([Rr][Ee][Ll][Ee][Aa][Ss][Ee])$\")
    set (OCCT_INSTALL_BIN_LETTER \"\")
  elseif (\"\${CMAKE_INSTALL_CONFIG_NAME}\" MATCHES \"^([Rr][Ee][Ll][Ww][Ii][Tt][Hh][Dd][Ee][Bb][Ii][Nn][Ff][Oo])$\")
    set (OCCT_INSTALL_BIN_LETTER \"i\")
  elseif (\"\${CMAKE_INSTALL_CONFIG_NAME}\" MATCHES \"^([Dd][Ee][Bb][Uu][Gg])$\")
    set (OCCT_INSTALL_BIN_LETTER \"d\")
  endif()")
endmacro()

macro (OCCT_UPDATE_DRAW_DEFAULT_FILE)
  install(CODE "cmake_policy(PUSH)
  cmake_policy(SET CMP0007 NEW)
  set (DRAW_DEFAULT_FILE_NAME \"${INSTALL_DIR}/${INSTALL_DIR_RESOURCE}/DrawResources/DrawPlugin\")
  file (STRINGS \"\${DRAW_DEFAULT_FILE_NAME}\" DRAW_DEFAULT_CONTENT)
  file (REMOVE \"\${DRAW_DEFAULT_FILE_NAME}\")
  foreach (line IN LISTS DRAW_DEFAULT_CONTENT)
    string (REGEX MATCH \": TK\([a-zA-Z]+\)$\" IS_TK_LINE \"\${line}\")
    string (REGEX REPLACE \": TK\([a-zA-Z]+\)$\" \": TK\${CMAKE_MATCH_1}${BUILD_SHARED_LIBRARY_NAME_POSTFIX}\" line \"\${line}\")
    file (APPEND \"\${DRAW_DEFAULT_FILE_NAME}\" \"\${line}\\n\")
  endforeach()
  cmake_policy(POP)")
endmacro()

macro (OCCT_CREATE_SYMLINK_TO_FILE LIBRARY_NAME LINK_NAME)
  if (NOT WIN32)
    install (CODE "if (EXISTS \"${LIBRARY_NAME}\")
        execute_process (COMMAND ln -s \"${LIBRARY_NAME}\" \"${LINK_NAME}\")
      endif()
    ")
  endif()
endmacro()