project('zstd', 'c', license: 'BSD')

libm = meson.get_compiler('c').find_library('m', required: true)

lib_dir = join_paths('..', '..', 'lib')
common_dir = join_paths(lib_dir, 'common')
compress_dir = join_paths(lib_dir, 'compress')
decompress_dir = join_paths(lib_dir, 'decompress')
dictbuilder_dir = join_paths(lib_dir, 'dictBuilder')
deprecated_dir = join_paths(lib_dir, 'deprecated')

libzstd_srcs = [
    join_paths(common_dir, 'entropy_common.c'),
    join_paths(common_dir, 'fse_decompress.c'),
    join_paths(common_dir, 'threading.c'),
    join_paths(common_dir, 'pool.c'),
    join_paths(common_dir, 'zstd_common.c'),
    join_paths(common_dir, 'error_private.c'),
    join_paths(common_dir, 'xxhash.c'),
    join_paths(compress_dir, 'fse_compress.c'),
    join_paths(compress_dir, 'hist.c'),
    join_paths(compress_dir, 'huf_compress.c'),
    join_paths(compress_dir, 'zstd_compress.c'),
    join_paths(compress_dir, 'zstd_fast.c'),
    join_paths(compress_dir, 'zstd_double_fast.c'),
    join_paths(compress_dir, 'zstd_lazy.c'),
    join_paths(compress_dir, 'zstd_opt.c'),
    join_paths(compress_dir, 'zstd_ldm.c'),
    join_paths(compress_dir, 'zstdmt_compress.c'),
    join_paths(decompress_dir, 'huf_decompress.c'),
    join_paths(decompress_dir, 'zstd_decompress.c'),
    join_paths(dictbuilder_dir, 'cover.c'),
    join_paths(dictbuilder_dir, 'divsufsort.c'),
    join_paths(dictbuilder_dir, 'zdict.c'),
    join_paths(deprecated_dir, 'zbuff_common.c'),
    join_paths(deprecated_dir, 'zbuff_compress.c'),
    join_paths(deprecated_dir, 'zbuff_decompress.c')
]

libzstd_includes = [include_directories(common_dir, dictbuilder_dir, compress_dir, lib_dir)]

legacy = get_option('legacy_support')
if legacy == '0'
    legacy = 'false'
endif
if legacy != 'false'
    if legacy == 'true'
        legacy = '1'
    endif
    #See ZSTD_LEGACY_SUPPORT of programs/README.md
    message('Enabling legacy support back to version 0.' + legacy)
    legacy_int = legacy.to_int()
    if legacy_int > 7
        legacy_int = 7
    endif
    libzstd_cflags = ['-DZSTD_LEGACY_SUPPORT=' + legacy]

    legacy_dir = join_paths(lib_dir, 'legacy')
    libzstd_includes += [include_directories(legacy_dir)]
    if legacy_int <= 1
        libzstd_srcs += join_paths(legacy_dir, 'zstd_v01.c')
    endif
    if legacy_int <= 2
        libzstd_srcs += join_paths(legacy_dir, 'zstd_v02.c')
    endif
    if legacy_int <= 3
        libzstd_srcs += join_paths(legacy_dir, 'zstd_v03.c')
    endif
    if legacy_int <= 4
        libzstd_srcs += join_paths(legacy_dir, 'zstd_v04.c')
    endif
    if legacy_int <= 5
        libzstd_srcs += join_paths(legacy_dir, 'zstd_v05.c')
    endif
    if legacy_int <= 6
        libzstd_srcs += join_paths(legacy_dir, 'zstd_v06.c')
    endif
    if legacy_int <= 7
        libzstd_srcs += join_paths(legacy_dir, 'zstd_v07.c')
    endif
else
    libzstd_cflags = []
endif

if get_option('multithread')
    message('Enabling multi-threading support')
    add_global_arguments('-DZSTD_MULTITHREAD', language: 'c')
    libzstd_deps = [dependency('threads')]
else
    libzstd_deps = []
endif

libzstd = library('zstd',
                  libzstd_srcs,
                  include_directories: libzstd_includes,
                  c_args: libzstd_cflags,
                  dependencies: libzstd_deps,
                  install: true,
                  soversion: '1',
                 )

programs_dir = join_paths('..', '..', 'programs')

zstd = executable('zstd',
                  join_paths(programs_dir, 'bench.c'),
                  join_paths(programs_dir, 'datagen.c'),
                  join_paths(programs_dir, 'dibio.c'),
                  join_paths(programs_dir, 'fileio.c'),
                  join_paths(programs_dir, 'zstdcli.c'),
                  include_directories: libzstd_includes,
                  c_args: ['-DZSTD_NODICT', '-DZSTD_NOBENCH'],
                  link_with: libzstd,
                  install: true)

tests_dir = join_paths('..', '..', 'tests')
datagen_c = join_paths(programs_dir, 'datagen.c')
test_includes = libzstd_includes + [include_directories(programs_dir)]

fullbench = executable('fullbench',
                       datagen_c, join_paths(tests_dir, 'fullbench.c'),
                       include_directories: test_includes,
                       link_with: libzstd)
test('fullbench', fullbench)

fuzzer = executable('fuzzer',
                    datagen_c, join_paths(tests_dir, 'fuzzer.c'),
                    include_directories: test_includes,
                    link_with: libzstd)
test('fuzzer', fuzzer)

if target_machine.system() != 'windows'
    paramgrill = executable('paramgrill',
                            datagen_c, join_paths(tests_dir, 'paramgrill.c'),
                            join_paths(programs_dir, 'bench.c'),
                            include_directories: test_includes,
                            link_with: libzstd,
                            dependencies: libm)
    test('paramgrill', paramgrill)

    datagen = executable('datagen',
                         datagen_c, join_paths(tests_dir, 'datagencli.c'),
                         include_directories: test_includes,
                         link_with: libzstd)
endif