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# Find LibLZ4
#
# Find LibLZ4 headers and library
#
# Result Variables
#
# LIBLZ4_FOUND - True if lz4 is found
# LIBLZ4_INCLUDE_DIRS - lz4 headers directories
# LIBLZ4_LIBRARIES - lz4 libraries
# LIBLZ4_VERSION_MAJOR - The major version of lz4
# LIBLZ4_VERSION_MINOR - The minor version of lz4
# LIBLZ4_VERSION_RELEASE - The release version of lz4
# LIBLZ4_VERSION_STRING - version number string (e.g. 1.8.3)
#
# Hints
#
# Set ``LZ4_ROOT_DIR`` to the directory of lz4.h and lz4 library
set(_LIBLZ4_ROOT_HINTS
ENV LZ4_ROOT_DIR)
find_path( LIBLZ4_INCLUDE_DIR lz4.h
HINTS ${_LIBLZ4_ROOT_HINTS})
find_library( LIBLZ4_LIBRARY NAMES lz4 liblz4 liblz4_static
HINTS ${_LIBLZ4_ROOT_HINTS})
if(LIBLZ4_INCLUDE_DIR)
file(STRINGS "${LIBLZ4_INCLUDE_DIR}/lz4.h" LIBLZ4_HEADER_CONTENT REGEX "#define LZ4_VERSION_[A-Z]+ +[0-9]+")
string(REGEX REPLACE ".*#define LZ4_VERSION_MAJOR +([0-9]+).*" "\\1" LIBLZ4_VERSION_MAJOR "${LIBLZ4_HEADER_CONTENT}")
string(REGEX REPLACE ".*#define LZ4_VERSION_MINOR +([0-9]+).*" "\\1" LIBLZ4_VERSION_MINOR "${LIBLZ4_HEADER_CONTENT}")
string(REGEX REPLACE ".*#define LZ4_VERSION_RELEASE +([0-9]+).*" "\\1" LIBLZ4_VERSION_RELEASE "${LIBLZ4_HEADER_CONTENT}")
set(LIBLZ4_VERSION_STRING "${LIBLZ4_VERSION_MAJOR}.${LIBLZ4_VERSION_MINOR}.${LIBLZ4_VERSION_RELEASE}")
unset(LIBLZ4_HEADER_CONTENT)
endif()
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibLZ4 REQUIRED_VARS LIBLZ4_INCLUDE_DIR
LIBLZ4_LIBRARY
VERSION_VAR LIBLZ4_VERSION_STRING
FAIL_MESSAGE "Could NOT find LZ4, try to set the paths to lz4.h and lz4 library in environment variable LZ4_ROOT_DIR")
if (LIBLZ4_FOUND)
set(LIBLZ4_LIBRARIES ${LIBLZ4_LIBRARY})
set(LIBLZ4_INCLUDE_DIRS ${LIBLZ4_INCLUDE_DIR})
endif ()
mark_as_advanced( LIBLZ4_INCLUDE_DIR LIBLZ4_LIBRARY )
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