Module: Proj4::FFIProj4

Extended by:
FFI::Library
Defined in:
lib/ffi-proj4.rb

Constant Summary collapse

FFI_LAYOUT = 
{
  :pj_get_release => [
    :string
  ],

  :pj_transform => [
    :int, :pointer, :pointer, :long, :int, :pointer, :pointer, :pointer
  ],

  :pj_init_plus => [
    :pointer, :string
  ],

  :pj_free => [
    :void, :pointer
  ],

  :pj_is_latlong => [
    :int, :pointer
  ],

  :pj_is_geocent => [
    :int, :pointer
  ],

  :pj_get_def => [
    :string, :pointer, :int
  ],

  :pj_latlong_from_proj => [
    :pointer, :pointer
  ],

  :pj_set_finder => [
    :void, callback([ :string ], :string)
  ],

  :pj_set_searchpath => [
    :void, :int, :pointer
  ],

  :pj_deallocate_grids => [
    :void
  ],

  :pj_strerrno => [
    :string, :int
  ],

  :pj_get_errno_ref => [
    :pointer
  ],

  :pj_fwd => [
    Proj4::ProjXY.by_value, Proj4::ProjXY.by_value, :pointer
  ],

  :pj_inv => [
    Proj4::ProjXY.by_value, Proj4::ProjXY.by_value, :pointer
  ],

  :pj_transform => [
    :int, :pointer, :pointer, :long, :int, :pointer, :pointer, :pointer
  ],

  :pj_datum_transform => [
    :int, :pointer, :pointer, :long, :int, :pointer, :pointer, :pointer
  ],
}

Class Method Summary collapse

Class Method Details

.proj4_library_path ⇒ Object 



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# File 'lib/ffi-proj4.rb', line 22

def self.proj4_library_path
  return @proj4_library_path if @proj4_library_path

  paths = if ENV['PROJ4_LIBRARY_PATH']
    [ ENV['PROJ4_LIBRARY_PATH'] ]
  else
    [ '/usr/local/{lib64,lib}', '/opt/local/{lib64,lib}', '/usr/{lib64,lib}' ]
  end

  lib = if FFI::Platform::IS_MAC
    'libproj.dylib'
  elsif FFI::Platform::IS_WINDOWS
    # For MinGW and the official binaries
    '{libproj-?,proj}.dll'
  else
    'libproj.so'
  end

  paths = if ENV['PROJ4_LIBRARY_PATH']
    [ ENV['PROJ4_LIBRARY_PATH'] ]
  elsif FFI::Platform::IS_WINDOWS
    ENV['PATH'].split(File::PATH_SEPARATOR)
  else
    [ '/usr/local/{lib64,lib}', '/opt/local/{lib64,lib}', '/usr/{lib64,lib}' ]
  end

  @proj4_library_path = Dir.glob(paths.collect { |path|
    File.expand_path(File.join(path, lib))
  }).first
end