In Files
- fiddle/lib/fiddle/struct.rb
Methods
Class/Module Index
- Fiddle
- Fiddle::BasicTypes
- Fiddle::CParser
- Fiddle::CStruct
- Fiddle::CStructBuilder
- Fiddle::CStructEntity
- Fiddle::CUnion
- Fiddle::CUnionEntity
- Fiddle::Closure
- Fiddle::Closure::BlockCaller
- Fiddle::CompositeHandler
- Fiddle::DLError
- Fiddle::Function
- Fiddle::Handle
- Fiddle::Importer
- Fiddle::Pointer
- Fiddle::Win32Types
Fiddle::CStructBuilder
Used to construct C classes (CUnion, CStruct, etc)
Fiddle::Importer#struct and Fiddle::Importer#union wrap this functionality in an easy-to-use manner.
Public Class Methods
create(klass, types, members)
Construct a new class given a C:
-
class
klass
(CUnion, CStruct, or other that provide an entity_class) -
types
(Fiddle::TYPE_INT, Fiddle::TYPE_SIZE_T, etc., see the C types constants) -
corresponding
members
Fiddle::Importer#struct and Fiddle::Importer#union wrap this functionality in an easy-to-use manner.
Example:
require 'fiddle/struct' require 'fiddle/cparser' include Fiddle::CParser types, members = parse_struct_signature(['int i','char c']) MyStruct = Fiddle::CStructBuilder.create(Fiddle::CUnion, types, members) obj = MyStruct.allocate
# File fiddle/lib/fiddle/struct.rb, line 51 def create(klass, types, members) new_class = Class.new(klass){ define_method(:initialize){|addr| @entity = klass.entity_class.new(addr, types) @entity.assign_names(members) } define_method(:to_ptr){ @entity } define_method(:to_i){ @entity.to_i } members.each{|name| define_method(name){ @entity[name] } define_method(name + "="){|val| @entity[name] = val } } } size = klass.entity_class.size(types) new_class.module_eval(" def new_class.size() #{size} end def new_class.malloc() addr = Fiddle.malloc(#{size}) new(addr) end ", __FILE__, __LINE__+1) return new_class end