Sha256: cd4bd559880ba4bdec63d1e81fe7290ad7ac58fa3dac576569d2b1396c3bf1f3
Contents?: true
Size: 935 Bytes
Versions: 6
Compression:
Stored size: 935 Bytes
Contents
# frozen_string_literal: true
require 'ffi'
module FFI
# Module to extend struct classes that are present in callbacks as fixed length arrays
module StructArray
# Generate a one way converter for a fixed size array of struct
# @return [DataConverter]
def array(size)
ArrayConverter.new(self, size)
end
# @!visibility private
# Helper to handle callbacks containing fixed length array of struct
class ArrayConverter
include DataConverter
def initialize(type, size)
@type = type
@size = size
end
def native_type(_type = nil)
FFI::Type::POINTER
end
def from_native(ptr, _ctx)
return [] if ptr.null?
Array.new(@size) { |i| @type.new(ptr + (i * @type.size)) }
end
def to_native(ary, _ctx)
raise NotImplementedError, "#{self.class.name} Cannot convert #{ary} to pointer"
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems