Module: ICU::Lib

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

Defined Under Namespace

Classes: UParseError, UTransPosition

Constant Summary collapse

VERSIONS = 
{
  "48" => "_48",
  "46" => "_46",
  "45" => "_45",
  "44" => "_44",
  "42" => "_4_2",
}

Class Method Summary collapse

Class Method Details

.check_error ⇒ Object 



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# File 'lib/ffi-icu/lib.rb', line 67

def self.check_error
  ptr = FFI::MemoryPointer.new(:int)
  ret = yield(ptr)
  error_code = ptr.read_int

  if error_code > 0
    name = Lib.u_errorName error_code
    if name == "U_BUFFER_OVERFLOW_ERROR"
      raise BufferOverflowError
    else
      raise Error, name
    end
  elsif error_code < 0
    warn "ffi-icu: #{Lib.u_errorName error_code}"
  end

  ret
end

.enum_ptr_to_array(enum_ptr) ⇒ Object 



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# File 'lib/ffi-icu/lib.rb', line 86

def self.enum_ptr_to_array(enum_ptr)
  length = check_error do |status|
    uenum_count(enum_ptr, status)
  end

  len = FFI::MemoryPointer.new(:int)

  (0...length).map do |idx|
    check_error { |st| uenum_next(enum_ptr, len, st) }
  end
end

.find_icu ⇒ Object

FIXME: this is incredibly ugly, figure out some better way



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# File 'lib/ffi-icu/lib.rb', line 20

def self.find_icu
  suffix = ''

  # let the user tell us where the lib is
  if ENV['FFI_ICU_LIB']
    libs = ENV['FFI_ICU_LIB'].split(",")
    ffi_lib(*libs)

    if ENV['FFI_ICU_VERSION_SUFFIX']
      return ENV['FFI_ICU_VERSION_SUFFIX']
    elsif num = libs.first[/\d+$/]
      return num.split(//).join("_")
    else
      return suffix
    end
  end

  libs = nil
  versions = VERSIONS.keys

  # ok, try to find it
  case ICU.platform
  when :osx
    ffi_lib "icucore"
  when :linux
    libs = ffi_lib versions.map { |v| "libicui18n.so.#{v}" },
                   versions.map { |v| "libicutu.so.#{v}"   }

  when :windows
    libs = ffi_lib versions.map { |v| "icuin#{v}.dll" }
  else
    raise LoadError
  end

  if libs
    lib_name = libs.first.name
    version  = VERSIONS.find { |object, func| lib_name =~ /#{object}(\.dll)?$/ }

    version or raise "unable to find suffix in #{lib_name}"
    suffix = version.last
  end

  suffix
rescue LoadError => ex
  raise LoadError, "no idea how to load ICU on #{ICU.platform.inspect}, patches appreciated! (#{ex.message})"
end

.not_available(func_name) ⇒ Object 



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# File 'lib/ffi-icu/lib.rb', line 98

def self.not_available(func_name)
  self.class.send :define_method, func_name do |*args|
    raise Error, "#{func_name} not available on platform #{ICU.platform.inspect}"
  end
end