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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
# Find the zstd library
#
# Input variables:
#
# - `ZSTD_INCLUDE_DIR`: Absolute path to zstd include directory.
# - `ZSTD_LIBRARY`: Absolute path to `zstd` library.
#
# Result variables:
#
# - `ZSTD_FOUND`: System has zstd.
# - `ZSTD_INCLUDE_DIRS`: The zstd include directories.
# - `ZSTD_LIBRARIES`: The zstd library names.
# - `ZSTD_LIBRARY_DIRS`: The zstd library directories.
# - `ZSTD_PC_REQUIRES`: The zstd pkg-config packages.
# - `ZSTD_CFLAGS`: Required compiler flags.
# - `ZSTD_VERSION`: Version of zstd.
if(DEFINED Zstd_INCLUDE_DIR AND NOT DEFINED ZSTD_INCLUDE_DIR)
message(WARNING "Zstd_INCLUDE_DIR is deprecated, use ZSTD_INCLUDE_DIR instead.")
set(ZSTD_INCLUDE_DIR "${Zstd_INCLUDE_DIR}")
endif()
if(DEFINED Zstd_LIBRARY AND NOT DEFINED ZSTD_LIBRARY)
message(WARNING "Zstd_LIBRARY is deprecated, use ZSTD_LIBRARY instead.")
set(ZSTD_LIBRARY "${Zstd_LIBRARY}")
endif()
set(ZSTD_PC_REQUIRES "libzstd")
if(CURL_USE_PKGCONFIG AND
NOT DEFINED ZSTD_INCLUDE_DIR AND
NOT DEFINED ZSTD_LIBRARY)
find_package(PkgConfig QUIET)
pkg_check_modules(ZSTD ${ZSTD_PC_REQUIRES})
endif()
if(ZSTD_FOUND)
set(Zstd_FOUND TRUE)
string(REPLACE ";" " " ZSTD_CFLAGS "${ZSTD_CFLAGS}")
message(STATUS "Found Zstd (via pkg-config): ${ZSTD_INCLUDE_DIRS} (found version \"${ZSTD_VERSION}\")")
else()
find_path(ZSTD_INCLUDE_DIR NAMES "zstd.h")
find_library(ZSTD_LIBRARY NAMES "zstd")
unset(ZSTD_VERSION CACHE)
if(ZSTD_INCLUDE_DIR AND EXISTS "${ZSTD_INCLUDE_DIR}/zstd.h")
set(_version_regex1 "#[\t ]*define[ \t]+ZSTD_VERSION_MAJOR[ \t]+([0-9]+).*")
set(_version_regex2 "#[\t ]*define[ \t]+ZSTD_VERSION_MINOR[ \t]+([0-9]+).*")
set(_version_regex3 "#[\t ]*define[ \t]+ZSTD_VERSION_RELEASE[ \t]+([0-9]+).*")
file(STRINGS "${ZSTD_INCLUDE_DIR}/zstd.h" _version_str1 REGEX "${_version_regex1}")
file(STRINGS "${ZSTD_INCLUDE_DIR}/zstd.h" _version_str2 REGEX "${_version_regex2}")
file(STRINGS "${ZSTD_INCLUDE_DIR}/zstd.h" _version_str3 REGEX "${_version_regex3}")
string(REGEX REPLACE "${_version_regex1}" "\\1" _version_str1 "${_version_str1}")
string(REGEX REPLACE "${_version_regex2}" "\\1" _version_str2 "${_version_str2}")
string(REGEX REPLACE "${_version_regex3}" "\\1" _version_str3 "${_version_str3}")
set(ZSTD_VERSION "${_version_str1}.${_version_str2}.${_version_str3}")
unset(_version_regex1)
unset(_version_regex2)
unset(_version_regex3)
unset(_version_str1)
unset(_version_str2)
unset(_version_str3)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Zstd
REQUIRED_VARS
ZSTD_INCLUDE_DIR
ZSTD_LIBRARY
VERSION_VAR
ZSTD_VERSION
)
if(ZSTD_FOUND)
set(ZSTD_INCLUDE_DIRS ${ZSTD_INCLUDE_DIR})
set(ZSTD_LIBRARIES ${ZSTD_LIBRARY})
endif()
mark_as_advanced(ZSTD_INCLUDE_DIR ZSTD_LIBRARY)
endif()
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