#-------------------------------------------------------------------
# This file is part of the CMake build system for Hydrax
#
# The contents of this file are placed in the public domain. Feel
# free to make use of it in any way you like.
#-------------------------------------------------------------------

macro(get_preprocessor_entry CONTENTS KEYWORD VARIABLE)
  string(REGEX MATCH
    "# *define +${KEYWORD} +((\"([^\n]*)\")|([^ \n]*))"
    PREPROC_TEMP_VAR
    ${${CONTENTS}}
  )
  if (CMAKE_MATCH_3)
    set(${VARIABLE} ${CMAKE_MATCH_3})
  else ()
    set(${VARIABLE} ${CMAKE_MATCH_4})
  endif ()
endmacro()

macro(hydrax_get_version HEADER)
	file(READ ${HEADER} TEMP_VAR_CONTENTS)
	get_preprocessor_entry(TEMP_VAR_CONTENTS HYDRAX_VERSION_MAJOR HYDRAX_VERSION_MAJOR)
	get_preprocessor_entry(TEMP_VAR_CONTENTS HYDRAX_VERSION_MINOR HYDRAX_VERSION_MINOR)
	get_preprocessor_entry(TEMP_VAR_CONTENTS HYDRAX_VERSION_PATCH HYDRAX_VERSION_PATCH)
	set(HYDRAX_VERSION "${HYDRAX_VERSION_MAJOR}.${HYDRAX_VERSION_MINOR}.${HYDRAX_VERSION_PATCH}")
endmacro()