lib/efl/eina_list.rb


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

#! /usr/bin/env ruby
# -*- coding: UTF-8 -*-
#
require 'efl/native/eina_list'
#
module Efl
    module EinaList
        #
        module Native
            #
            class EinaListStruct < FFI::Struct
                layout  :data,          :pointer,
                        :next,          :pointer,
                        :prev,          :pointer,
                        :accounting,    :pointer,
                        :magic,         :uint
            end
        end
        #
        class REinaList
            include Enumerable
            include Efl::ClassHelper
            proxy_list [Efl::EinaList::Native,'eina_list_'].freeze
            def initialize o=nil
                @ptr = (
                    case o
                    when FFI::Pointer
                        o
                    when NilClass
                        FFI::Pointer::NULL
                    when Array
                        o.inject(FFI::Pointer::NULL) { |p,e| Native.eina_list_append p, e }
                    else
                        raise ArgumentError.new "wrong argument #{o.class.name}"
                    end
                )
            end
            def free
                Native.eina_list_free @ptr
                @ptr = nil
            end
            def each
                return if not block_given?
                p = @ptr
                while p!=::FFI::Pointer::NULL
                    l = Native::EinaListStruct.new p
                    yield l[:data]
                    p = l[:next]
                end
            end
            def to_ary
                inject([]) { |s,e| s<<e }
            end
            # for fun and tests
            def append p
                @ptr = Native.eina_list_append @ptr, p
            end
            alias :<< :append
            def prepend p
                @ptr = Native.eina_list_prepend @ptr, p
            end
            alias :unshift :prepend
        end
    end
end
#
# EOF