In Files
- dl/lib/dl/struct.rb
Methods
Class/Module Index
![[+]](../images/find.png "show/hide quicksearch")
- DL
- DL::BasicTypes
- DL::CFunc
- DL::CParser
- DL::CPtr
- DL::CStruct
- DL::CStructBuilder
- DL::CStructEntity
- DL::CUnion
- DL::CUnionEntity
- DL::CarriedFunction
- DL::CompositeHandler
- DL::DLError
- DL::DLTypeError
- DL::Function
- DL::Handle
- DL::Importer
- DL::Packer
- DL::Stack
- DL::TempFunction
- DL::ValueUtil
- DL::Win32Types
- Object
DL::CStructBuilder
Used to construct C classes (CUnion, CStruct, etc)
DL::Importer#struct and DL::Importer#union wrap this functionality in an easy-to-use manner.
Public Class Methods
Construct a new class given a C:
-
class
klass(CUnion, CStruct, or other that provide an entity_class) -
types(DL:TYPE_INT, DL::TYPE_SIZE_T, etc., see the C types constants) -
corresponding
members
DL::Importer#struct and DL::Importer#union wrap this functionality in an easy-to-use manner.
Example:
require 'dl/struct' require 'dl/cparser' include DL::CParser types, members = parse_struct_signature(['int i','char c']) MyStruct = DL::CStructBuilder.create(CUnion, types, members) obj = MyStruct.allocate
# File dl/lib/dl/struct.rb, line 50
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 = DL.malloc(#{size})
new(addr)
end
", __FILE__, __LINE__+1)
return new_class
end
Commenting is here to help enhance the documentation. For example, code samples, or clarification of the documentation.
If you have questions about Ruby or the documentation, please post to one of the Ruby mailing lists. You will get better, faster, help that way.
If you wish to post a correction of the docs, please do so, but also file bug report so that it can be corrected for the next release. Thank you.
If you want to help improve the Ruby documentation, please visit Documenting-ruby.org.