#
#  Copyright (c) 2006, Peter Kümmel, <syntheticpp@gmx.net>
#                2012, Kornel Benko, <kornel@lyx.org>
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions
#  are met:
#  
#  1. Redistributions of source code must retain the copyright
#     notice, this list of conditions and the following disclaimer.
#  2. Redistributions in binary form must reproduce the copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#  3. The name of the author may not be used to endorse or promote products 
#     derived from this software without specific prior written permission.
#  
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
#  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
#  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
#  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
#  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
#  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
#  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#  

set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)

include(CheckFunctionExists)
macro(check_magic_functions_exists _varname)
	set(${_varname} 1)
	if (Magic_LIBRARY)
		set(CMAKE_REQUIRED_LIBRARIES ${Magic_LIBRARY})
	endif()
	foreach(fkt file open load close error)
		check_function_exists(magic_${fkt} HAS_function_magic_${fkt})
		if (NOT HAS_function_magic_${fkt})
			set(${_varname} 0)
			message(STATUS "Function magic_${fkt} not found")
		endif()
	endforeach()
endmacro()
if (Magic_INCLUDE_DIR)
  # Already in cache, be silent
  set(Magic_FIND_QUIETLY TRUE)
endif()

find_path(Magic_INCLUDE_DIR magic.h PATHS
 /usr/include
 /usr/local/include)
 	
find_library(Magic_LIBRARY NAMES "magic")
	
check_magic_functions_exists(HAS_MAGIC_FUNCTIONS)

if(Magic_INCLUDE_DIR AND Magic_LIBRARY AND HAS_MAGIC_FUNCTIONS)
	set(Magic_FOUND TRUE)
endif()

if(Magic_FOUND)
   if(NOT Magic_FIND_QUIETLY)
      message(STATUS "Found magic library: ${Magic_LIBRARY}")
   endif()
else()
   if(Magic_FIND_REQUIRED)
      message(STATUS "Looked for magic library named magic.")
      message(STATUS "Found no acceptable magic library. This is fatal.")
      message(STATUS "magic header: ${Magic_INCLUDE_DIR}")
      message(STATUS "magic lib   : ${Magic_LIBRARY}")
      message(FATAL_ERROR "Could NOT find magic library")
   endif()
endif()

mark_as_advanced(Magic_LIBRARY Magic_INCLUDE_DIR)