# Works the same as find_package, but forwards the "REQUIRED" and "QUIET" arguments

# used for the current package. For this to work, the first parameter must be the

# prefix of the current package, then the prefix of the new package etc, which are

# passed to find_package.

macro(libfind_package PREFIX)

	set(LIBFIND_PACKAGE_ARGS $ {ARGN})

	if($ {PREFIX} _FIND_QUIETLY)

		set(LIBFIND_PACKAGE_ARGS $ {LIBFIND_PACKAGE_ARGS} QUIET)

	endif($ {PREFIX} _FIND_QUIETLY)

	if($ {PREFIX} _FIND_REQUIRED)

		set(LIBFIND_PACKAGE_ARGS $ {LIBFIND_PACKAGE_ARGS} REQUIRED)

	endif($ {PREFIX} _FIND_REQUIRED)

	find_package($ {LIBFIND_PACKAGE_ARGS})

endmacro(libfind_package)

# CMake developers made the UsePkgConfig system deprecated in the same release (2.6)

# where they added pkg_check_modules. Consequently I need to support both in my scripts

# to avoid those deprecated warnings. Here's a helper that does just that.

# Works identically to pkg_check_modules, except that no checks are needed prior to use.

macro (libfind_pkg_check_modules PREFIX PKGNAME)

	if (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)

		include(UsePkgConfig)

		pkgconfig(${PKGNAME} ${PREFIX}_INCLUDE_DIRS ${PREFIX}_LIBRARY_DIRS ${PREFIX}_LDFLAGS ${PREFIX}_CFLAGS)

	else (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)

		find_package(PkgConfig)

		if (PKG_CONFIG_FOUND)

			pkg_check_modules(${PREFIX} ${PKGNAME})

		endif (PKG_CONFIG_FOUND)

	endif (${CMAKE_MAJOR_VERSION} EQUAL 2 AND ${CMAKE_MINOR_VERSION} EQUAL 4)

endmacro (libfind_pkg_check_modules)

# Do the final processing once the paths have been detected.

# If include dirs are needed, ${PREFIX}_PROCESS_INCLUDES should be set to contain

# all the variables, each of which contain one include directory.

# Ditto for ${PREFIX}_PROCESS_LIBS and library files.

# Will set ${PREFIX}_FOUND, ${PREFIX}_INCLUDE_DIRS and ${PREFIX}_LIBRARIES.

# Also handles errors in case library detection was required, etc.

macro (libfind_process PREFIX)

# Skip processing if already processed during this run

	if (NOT ${PREFIX}_FOUND)

# Start with the assumption that the library was found

		set (${PREFIX}_FOUND TRUE)

# Process all includes and set _FOUND to false if any are missing

		foreach (i ${${PREFIX}_PROCESS_INCLUDES})

			if (${i})

				set (${PREFIX}_INCLUDE_DIRS ${${PREFIX}_INCLUDE_DIRS} ${${i}})

				mark_as_advanced(${i})

			else (${i})

				set (${PREFIX}_FOUND FALSE)

			endif (${i})

		endforeach (i)

# Process all libraries and set _FOUND to false if any are missing

		foreach (i ${${PREFIX}_PROCESS_LIBS})

			if (${i})

				set (${PREFIX}_LIBRARIES ${${PREFIX}_LIBRARIES} ${${i}})

				mark_as_advanced(${i})

			else (${i})

				set (${PREFIX}_FOUND FALSE)

			endif (${i})

		endforeach (i)

# Print message and/or exit on fatal error

		if (${PREFIX}_FOUND)

			if (NOT ${PREFIX}_FIND_QUIETLY)

				message (STATUS "Found ${PREFIX} ${${PREFIX}_VERSION}")

			endif (NOT ${PREFIX}_FIND_QUIETLY)

		else (${PREFIX}_FOUND)

			if (${PREFIX}_FIND_REQUIRED)

				foreach (i ${${PREFIX}_PROCESS_INCLUDES} ${${PREFIX}_PROCESS_LIBS})

					message("${i}=${${i}}")

				endforeach (i)

				message (FATAL_ERROR "Required library ${PREFIX} NOT FOUND.\nInstall the library (dev version) and try again. If the library is already installed, use ccmake to set the missing variables manually.")

			endif (${PREFIX}_FIND_REQUIRED)

		endif (${PREFIX}_FOUND)

	endif (NOT ${PREFIX}_FOUND)

endmacro (libfind_process)

macro(libfind_library PREFIX basename)

	set(TMP "")

	if(MSVC80)

		set(TMP -vc80)

	endif(MSVC80)

	if(MSVC90)

		set(TMP -vc90)

	endif(MSVC90)

	set(${PREFIX}_LIBNAMES ${basename}${TMP})

	if(${ARGC} GREATER 2)

		set(${PREFIX}_LIBNAMES ${basename}${TMP}-${ARGV2})

		string(REGEX REPLACE "\\." "_" TMP ${${PREFIX}_LIBNAMES})

		set(${PREFIX}_LIBNAMES ${${PREFIX}_LIBNAMES} ${TMP})

	endif(${ARGC} GREATER 2)

	find_library(${PREFIX}_LIBRARY

		NAMES ${${PREFIX}_LIBNAMES}

		PATHS ${${PREFIX}_PKGCONF_LIBRARY_DIRS})

endmacro(libfind_library)

SET(THREE_PART_VERSION_REGEX "[0-9]+\\.[0-9]+\\.[0-9]+")

# Breaks up a string in the form n1.n2.n3 into three parts and stores

# them in major, minor, and patch.	version should be a value, not a

# variable, while major, minor and patch should be variables.

MACRO(THREE_PART_VERSION_TO_VARS version major minor patch)

	IF(${version} MATCHES ${THREE_PART_VERSION_REGEX})

		STRING(REPLACE "." " " version_list ${version})

		SEPARATE_ARGUMENTS(version_list)

		LIST(GET version_list 0 ${major})

		LIST(GET version_list 1 ${minor})

		LIST(GET version_list 2 ${patch})

	ELSE(${version} MATCHES ${THREE_PART_VERSION_REGEX})

		MESSAGE("MACRO(THREE_PART_VERSION_TO_VARS ${version} ${major} ${minor} ${patch}")

		MESSAGE(FATAL_ERROR "Problem parsing version string, I can't parse it properly.")

	ENDIF(${version} MATCHES ${THREE_PART_VERSION_REGEX})

ENDMACRO(THREE_PART_VERSION_TO_VARS)