# Copyright 2022 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""zlib is a general purpose data compression library."""

ZLIB_COPTS = [
    "-Wno-implicit-function-declaration",
    "-Wno-conversion",
    "-Wno-implicit-fallthrough",
    "-Wno-strict-prototypes",
]

# This library exposes the headers both as the google3-preferred
# "third_party/zlib/zlib.h" as well as externally-typical <zlib.h>.
cc_library(
    name = "zlibonly",
    hdrs = [
        "zconf.h",
        "zlib.h",
    ],
    copts = ZLIB_COPTS,
    include_prefix = "third_party/zlib",
    includes = ["."],
    visibility = ["//visibility:public"],
    deps = [":zlibonlyimpl"],
)

alias(
    name = "zlibsystem",
    actual = ":zlibonly",
    visibility = ["//visibility:public"],
)

# If you add or remove source files from this list, you should make the
# same change in zlib.gyp.
ZLIB_SOURCES = [
    "adler32.c",
    "compress.c",
    "crc32.c",
    "deflate.c",
    "gzclose.c",
    "gzlib.c",
    "gzread.c",
    "gzwrite.c",
    "infback.c",
    "inffast.c",
    "inftrees.c",
    "trees.c",
    "uncompr.c",
    "zutil.c",
] + select({
    "//build/bazel/platforms/arch:arm64": glob([
        "contrib/optimizations/*.c",
    ]),
    "//conditions:default": ["inflate.c"],
})

ZLIB_HEADERS = glob(
    [
        "*.h",
        "contrib/optimizations/*.h",
    ],
)

ZLIB_DEFINES = ["ZLIB_IMPLEMENTATION"]

cc_library(
    name = "zlibonlyimpl",
    srcs = ZLIB_SOURCES,
    copts = [
        "-Wno-implicit-function-declaration",
    ] + ZLIB_COPTS,
    includes = ["src"],
    local_defines = ZLIB_DEFINES,
    deps = [":zlibonly_internal_hdrs"],
)

cc_library(
    name = "zlibonly_internal_hdrs",
    textual_hdrs = ZLIB_HEADERS,
    visibility = ["//visibility:private"],
)