# FindGLib.cmake <https://github.com/nemequ/gnome-cmake>
#
# CMake support for GLib/GObject/GIO.
#
# License:
#
# Copyright (c) 2016 Evan Nemerson <evan@nemerson.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
# ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

find_package (PkgConfig)

if (PKG_CONFIG_FOUND)
	pkg_search_module (GLib_PKG glib-2.0)
endif ()

find_library (GLib_LIBRARY glib-2.0 HINTS ${GLib_PKG_LIBRARY_DIRS})
set (GLib glib-2.0)

if (GLib_LIBRARY AND NOT GLib_FOUND)
	add_library (${GLib} SHARED IMPORTED)
	set_property (TARGET ${GLib} PROPERTY IMPORTED_LOCATION "${GLib_LIBRARY}")
	set_property (TARGET ${GLib} PROPERTY INTERFACE_COMPILE_OPTIONS "${GLib_PKG_CFLAGS_OTHER}")

	find_path (
		GLib_INCLUDE_DIRS "glib.h"
		HINTS ${GLib_PKG_INCLUDE_DIRS}
		PATH_SUFFIXES "glib-2.0")

	get_filename_component (GLib_LIBDIR "${GLib}" DIRECTORY)
	find_path (
		GLib_CONFIG_INCLUDE_DIR "glibconfig.h"
		HINTS ${GLib_LIBDIR} ${GLib_PKG_INCLUDE_DIRS}
		PATHS "${CMAKE_LIBRARY_PATH}"
		PATH_SUFFIXES "glib-2.0/include" "glib-2.0")
	unset (GLib_LIBDIR)

	if (GLib_CONFIG_INCLUDE_DIR)
		file (STRINGS "${GLib_CONFIG_INCLUDE_DIR}/glibconfig.h" GLib_MAJOR_VERSION REGEX "^#define GLIB_MAJOR_VERSION +([0-9]+)")
		string (REGEX REPLACE "^#define GLIB_MAJOR_VERSION ([0-9]+)$" "\\1" GLib_MAJOR_VERSION "${GLib_MAJOR_VERSION}")
		file (STRINGS "${GLib_CONFIG_INCLUDE_DIR}/glibconfig.h" GLib_MINOR_VERSION REGEX "^#define GLIB_MINOR_VERSION +([0-9]+)")
		string (REGEX REPLACE "^#define GLIB_MINOR_VERSION ([0-9]+)$" "\\1" GLib_MINOR_VERSION "${GLib_MINOR_VERSION}")
		file (STRINGS "${GLib_CONFIG_INCLUDE_DIR}/glibconfig.h" GLib_PATCH_VERSION REGEX "^#define GLIB_PATCH_VERSION +([0-9]+)")
		string (REGEX REPLACE "^#define GLIB_PATCH_VERSION ([0-9]+)$" "\\1" GLib_PATCH_VERSION "${GLib_PATCH_VERSION}")
		set (GLib_VERSION "${GLib_MAJOR_VERSION}.${GLib_MINOR_VERSION}.${GLib_PATCH_VERSION}")
		unset (GLib_MAJOR_VERSION)
		unset (GLib_MINOR_VERSION)
		unset (GLib_PATCH_VERSION)

		list (APPEND GLib_INCLUDE_DIRS ${GLib_CONFIG_INCLUDE_DIR})
		set_property (TARGET ${GLib} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${GLib_INCLUDE_DIRS}")
	endif ()
endif ()

include (FindPackageHandleStandardArgs)
find_package_handle_standard_args (
	GLib
	REQUIRED_VARS GLib_LIBRARY GLib_INCLUDE_DIRS
	VERSION_VAR GLib_VERSION)
