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Contents
# frozen_string_literal: true
module GirFFI
# Base module providing class methods for generated classes representing GLib
# structs, unions and boxed types.
module StructLikeBase
def self.included(base)
base.extend ClassMethods
end
# Class methods for struct-like classes.
module ClassMethods
def native_type
FFI::Type::Struct.new(self::Struct)
end
def to_ffi_type
self
end
# NOTE: Needed for JRuby's FFI
def to_native(value, _context)
value.struct
end
def get_value_from_pointer(pointer, offset)
pointer + offset
end
def size
self::Struct.size
end
def copy_value_to_pointer(value, pointer, offset = 0)
bytes = value.to_ptr.read_bytes(size)
pointer.put_bytes offset, bytes
end
# Create an unowned copy of the struct represented by val
def copy_from(val)
return unless val
disown copy from(val)
end
# Wrap an owned copy of the struct represented by val
def wrap_copy(val)
return unless val
own copy(val)
end
# Wrap value and take ownership of it
def wrap_own(val)
return unless val
return if val.null?
own wrap(val)
end
private
def own(val)
val.struct.owned = true
val
end
def disown(val)
val.struct.owned = nil
val
end
# Create a copy of the struct represented by val
def copy(val)
new.tap do |copy|
copy_value_to_pointer(val, copy.to_ptr)
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems