Class: GLib::Array

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/ffi-glib/array.rb

Overview

Overrides for GArray, GLib’s automatically growing array. It should not be necessary to create objects of this class from Ruby directly.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#element_type ⇒ Object

Returns the value of attribute element_type.



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# File 'lib/ffi-glib/array.rb', line 9

def element_type
  @element_type
end

Class Method Details

.from(elmtype, it) ⇒ Object 



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# File 'lib/ffi-glib/array.rb', line 52

def self.from elmtype, it
  case it
  when self then it
  when FFI::Pointer then wrap elmtype, it
  else self.new(elmtype).tap {|arr| arr.append_vals it }
  end
end

.new(type) ⇒ Object 



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# File 'lib/ffi-glib/array.rb', line 17

def new type
  ptr = Lib.g_array_new(0, 0, calculated_element_size(type))
  wrap type, ptr
end

.wrap(elmttype, ptr) ⇒ Object 



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# File 'lib/ffi-glib/array.rb', line 46

def self.wrap elmttype, ptr
  super(ptr).tap do |array|
    array.element_type = elmttype if array
  end
end

Instance Method Details

#append_vals(data) ⇒ Object 



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# File 'lib/ffi-glib/array.rb', line 23

def append_vals data
  bytes = GirFFI::InPointer.from_array element_type, data
  len = data.length
  Lib.g_array_append_vals(self, bytes, len)
  self
end

#each ⇒ Object 



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# File 'lib/ffi-glib/array.rb', line 36

def each
  @struct[:len].times.each do |idx|
    yield index(idx)
  end
end

#get_element_size ⇒ Object 



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# File 'lib/ffi-glib/array.rb', line 42

def get_element_size
  Lib.g_array_get_element_size self
end

#index(idx) ⇒ Object

Re-implementation of the g_array_index macro



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# File 'lib/ffi-glib/array.rb', line 31

def index idx
  ptr = @struct[:data].get_pointer(idx * get_element_size)
  GirFFI::ArgHelper.cast_from_pointer(element_type, ptr)
end