In Files
- fiddle/lib/fiddle/struct.rb
Methods
Class/Module Index
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- 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
- Win32
- Win32::Registry
- Win32::Registry::API
- Win32::Registry::Constants
- Win32::Registry::Error
- Win32::Registry::Error::Kernel32
- Win32::Registry::PredefinedKey
- Win32::Resolv
- Win32::Resolv::Kernel32
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
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 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 = Fiddle.malloc(#{size})
new(addr)
end
", __FILE__, __LINE__+1)
return new_class
end
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