Sha256: 0c056ddb79f3f7f424740b0261a7fce6064678f97aa087c56379b855929eebfe
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Size: 1.98 KB
Versions: 6
Compression:
Stored size: 1.98 KB
Contents
# frozen_string_literal: true
require 'gir_ffi/allocation_helper'
require 'gir_ffi/builder'
require 'gir_ffi/glib_error'
require 'gir_ffi/object_store'
module GirFFI
# Helper module containing methods used during argument conversion in
# generated methods.
module ArgHelper
OBJECT_STORE = ObjectStore.new
def self.check_error(errpp)
err = GLib::Error.wrap(errpp.read_pointer)
raise GLibError, err if err
end
def self.check_fixed_array_size(size, arr, name)
raise ArgumentError, "#{name} should have size #{size}" unless arr.size.equal? size
end
# NOTE: Only used in List, SList and HashTable classes.
# TODO: Stop using basic types and instead cast type to an ITypeInfo
# look-alike.
def self.cast_from_pointer(type, ptr)
case type
when Symbol
cast_from_simple_type_pointer(type, ptr)
when Class
type.wrap ptr
when Array
cast_from_complex_type_pointer(type, ptr)
end
end
def self.cast_uint32_to_int32(val)
if val >= 0x80000000
-(0x100000000 - val)
else
val
end
end
def self.cast_pointer_to_int32(ptr)
cast_uint32_to_int32(ptr.address & 0xffffffff)
end
def self.store(obj)
OBJECT_STORE.store(obj)
end
def self.cast_from_simple_type_pointer(type, ptr)
case type
when :utf8, :filename
ptr.to_utf8
when :gint32, :gint8
cast_pointer_to_int32 ptr
when :guint32
ptr.address
else
raise "Don't know how to cast #{type}"
end
end
def self.cast_from_complex_type_pointer(type, ptr)
main_type, (container_type, *element_type) = *type
case main_type
when :pointer
case container_type
when :ghash
return GLib::HashTable.wrap(element_type, ptr)
end
end
raise "Don't know how to cast #{type}"
end
private_class_method :cast_from_complex_type_pointer, :cast_from_simple_type_pointer
end
end
Version data entries
6 entries across 6 versions & 1 rubygems