# Explicitly list the source files for this subdirectory
#
# If you add any source files to this subdirectory
#    that should be included in the kenlm library,
#        (this excludes any unit test files)
#    you should add them to the following list:
#
# Because we do not set PARENT_SCOPE in the following definition,
#    CMake files in the parent directory won't be able to access this variable.
#
set(KENLM_UTIL_SOURCE
		bit_packing.cc
		ersatz_progress.cc
		exception.cc
		file.cc
		file_piece.cc
		float_to_string.cc
		integer_to_string.cc
		mmap.cc
		murmur_hash.cc
		parallel_read.cc
		pool.cc
		read_compressed.cc
		scoped.cc
    spaces.cc
		string_piece.cc
		usage.cc
	)

if (WIN32)
  set(KENLM_UTIL_SOURCE ${KENLM_UTIL_SOURCE} getopt.c)
endif()

# This directory has children that need to be processed
add_subdirectory(double-conversion)
add_subdirectory(stream)

add_library(kenlm_util ${KENLM_UTIL_DOUBLECONVERSION_SOURCE} ${KENLM_UTIL_STREAM_SOURCE} ${KENLM_UTIL_SOURCE})
# Since headers are relative to `include/kenlm` at install time, not just `include`
target_include_directories(kenlm_util PUBLIC $<INSTALL_INTERFACE:include/kenlm>)

set(READ_COMPRESSED_FLAGS)
find_package(ZLIB)
if (ZLIB_FOUND)
  set(READ_COMPRESSED_FLAGS "${READ_COMPRESSED_FLAGS} -DHAVE_ZLIB")
  target_link_libraries(kenlm_util PRIVATE ${ZLIB_LIBRARIES})
  include_directories(${ZLIB_INCLUDE_DIR})
endif()

find_package(BZip2)
if (BZIP2_FOUND)
  set(READ_COMPRESSED_FLAGS "${READ_COMPRESSED_FLAGS} -DHAVE_BZLIB")
    target_link_libraries(kenlm_util PRIVATE ${BZIP2_LIBRARIES})
  include_directories(${BZIP2_INCLUDE_DIR})
endif()

find_package(LibLZMA)
if (LIBLZMA_FOUND)
  set(READ_COMPRESSED_FLAGS "${READ_COMPRESSED_FLAGS} -DHAVE_XZLIB")
      target_link_libraries(kenlm_util PRIVATE ${LIBLZMA_LIBRARIES})
  include_directories(${LIBLZMA_INCLUDE_DIRS})
endif()
if (NOT "${READ_COMPRESSED_FLAGS}" STREQUAL "")
  set_source_files_properties(read_compressed.cc PROPERTIES COMPILE_FLAGS ${READ_COMPRESSED_FLAGS})
  set_source_files_properties(read_compressed_test.cc PROPERTIES COMPILE_FLAGS ${READ_COMPRESSED_FLAGS})
  set_source_files_properties(file_piece_test.cc PROPERTIES COMPILE_FLAGS ${READ_COMPRESSED_FLAGS})
endif()

if(UNIX)
  include(CheckLibraryExists)
  check_library_exists(rt clock_gettime "clock_gettime from librt" HAVE_CLOCKGETTIME_RT)
  if (HAVE_CLOCKGETTIME_RT)
    set(RT rt)
  else()
    check_library_exists(c clock_gettime "clock_gettime from the libc" HAVE_CLOCKGETTIME)
  endif()

  if (HAVE_CLOCKGETTIME_RT OR HAVE_CLOCKGETTIME)
    add_definitions(-DHAVE_CLOCKGETTIME)
  endif()
endif()

# Group these objects together for later use.
set_target_properties(kenlm_util PROPERTIES POSITION_INDEPENDENT_CODE ON)
target_link_libraries(kenlm_util
  PUBLIC
  # Boost is required for building binaries and tests
  "$<BUILD_INTERFACE:${Boost_LIBRARIES}>"
  PRIVATE
  Threads::Threads
  ${RT})

install(
  TARGETS kenlm_util
  EXPORT kenlmTargets
  RUNTIME DESTINATION bin
  LIBRARY DESTINATION lib
  ARCHIVE DESTINATION lib
  INCLUDES DESTINATION include
)

if (NOT WIN32)
AddExes(EXES probing_hash_table_benchmark
        LIBRARIES kenlm_util Threads::Threads)
endif()

# Only compile and run unit tests if tests should be run
if(BUILD_TESTING)
  set(KENLM_BOOST_TESTS_LIST
    bit_packing_test
    integer_to_string_test
    joint_sort_test
    multi_intersection_test
    pcqueue_test
    probing_hash_table_test
    read_compressed_test
    sized_iterator_test
    sorted_uniform_test
    string_stream_test
    tokenize_piece_test
  )

  AddTests(TESTS ${KENLM_BOOST_TESTS_LIST}
           LIBRARIES kenlm_util Threads::Threads)

  # file_piece_test requires an extra command line parameter
  KenLMAddTest(TEST file_piece_test
               LIBRARIES kenlm_util Threads::Threads
               TEST_ARGS ${CMAKE_CURRENT_SOURCE_DIR}/file_piece.cc)
endif()