module GirFFI::ArgHelper
Helper module containing methods used during argument conversion in generated methods.
Constants
- OBJECT_STORE
Public Class Methods
cast_from_pointer(type, it)
click to toggle source
# File lib/gir_ffi/arg_helper.rb, line 48 def self.cast_from_pointer(type, it) case type when :utf8, :filename it.to_utf8 when :gint32, :gint8 cast_pointer_to_int32 it when Class type.wrap it when :guint32 it.address when Array main_type, subtype = *type raise "Unexpected main type #{main_type}" if main_type != :pointer case subtype when Array container_type, *element_type = *subtype raise "Unexpected container type #{container_type}" if container_type != :ghash GLib::HashTable.wrap(element_type, it) else raise "Unexpected subtype #{subtype}" end else raise "Don't know how to cast #{type}" end end
cast_pointer_to_int32(ptr)
click to toggle source
# File lib/gir_ffi/arg_helper.rb, line 83 def self.cast_pointer_to_int32(ptr) cast_uint32_to_int32(ptr.address & 0xffffffff) end
cast_uint32_to_int32(val)
click to toggle source
# File lib/gir_ffi/arg_helper.rb, line 75 def self.cast_uint32_to_int32(val) if val >= 0x80000000 -(0x100000000 - val) else val end end
check_error(errpp)
click to toggle source
# File lib/gir_ffi/arg_helper.rb, line 37 def self.check_error(errpp) err = GLib::Error.wrap(errpp.read_pointer) raise GLibError, err if err end
check_fixed_array_size(size, arr, name)
click to toggle source
# File lib/gir_ffi/arg_helper.rb, line 42 def self.check_fixed_array_size(size, arr, name) unless arr.size == size raise ArgumentError, "#{name} should have size #{size}" end end
ptr_to_utf8_length(ptr, len)
click to toggle source
# File lib/gir_ffi/arg_helper.rb, line 33 def self.ptr_to_utf8_length(ptr, len) ptr.null? ? nil : ptr.read_string(len) end