# Copied from https://github.com/protocolbuffers/protobuf/blob/master/third_party/zlib.BUILD

#  Copyright 2008 Google Inc.  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions are
#  met:
#
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#  contributors may be used to endorse or promote products derived from
#  this software without specific prior written permission.
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#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#  Code generated by the Protocol Buffer compiler is owned by the owner
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#  standalone and requires a support library to be linked with it.  This
#  support library is itself covered by the above license.

load("@rules_cc//cc:defs.bzl", "cc_library")

licenses(["notice"])  # BSD/MIT-like license (for zlib)

_ZLIB_HEADERS = [
    "crc32.h",
    "deflate.h",
    "gzguts.h",
    "inffast.h",
    "inffixed.h",
    "inflate.h",
    "inftrees.h",
    "trees.h",
    "zconf.h",
    "zlib.h",
    "zutil.h",
]

_ZLIB_PREFIXED_HEADERS = ["zlib/include/" + hdr for hdr in _ZLIB_HEADERS]

# In order to limit the damage from the `includes` propagation
# via `:zlib`, copy the public headers to a subdirectory and
# expose those.
genrule(
    name = "copy_public_headers",
    srcs = _ZLIB_HEADERS,
    outs = _ZLIB_PREFIXED_HEADERS,
    cmd = "cp $(SRCS) $(@D)/zlib/include/",
)

cc_library(
    name = "zlib",
    srcs = [
        "adler32.c",
        "compress.c",
        "crc32.c",
        "deflate.c",
        "gzclose.c",
        "gzlib.c",
        "gzread.c",
        "gzwrite.c",
        "infback.c",
        "inffast.c",
        "inflate.c",
        "inftrees.c",
        "trees.c",
        "uncompr.c",
        "zutil.c",
        # Include the un-prefixed headers in srcs to work
        # around the fact that zlib isn't consistent in its
        # choice of <> or "" delimiter when including itself.
    ] + _ZLIB_HEADERS,
    hdrs = _ZLIB_PREFIXED_HEADERS,
    copts = select({
        "@bazel_tools//src/conditions:windows": [],
        "//conditions:default": [
            "-Wno-unused-variable",
            "-Wno-implicit-function-declaration",
        ],
    }),
    includes = ["zlib/include/"],
    visibility = ["//visibility:public"],
)