class GirFFI::ZeroTerminated
Represents a null-terminated array.
Attributes
Public Class Methods
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# File lib/gir_ffi/zero_terminated.rb, line 19 def self.from(type, arg) new type, InPointer.from_array(type, arg) end
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# File lib/gir_ffi/zero_terminated.rb, line 10 def initialize(elm_t, ptr) @element_type = elm_t @ptr = ptr end
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# File lib/gir_ffi/zero_terminated.rb, line 23 def self.wrap(type, arg) new type, arg end
Public Instance Methods
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# File lib/gir_ffi/zero_terminated.rb, line 37 def ==(other) to_a == other.to_a end
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# File lib/gir_ffi/zero_terminated.rb, line 27 def each return if @ptr.null? offset = 0 while (val = read_value(offset)) offset += ffi_type_size yield wrap_value(val) end end
Private Instance Methods
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# File lib/gir_ffi/zero_terminated.rb, line 52 def fetch_value(offset) case ffi_type when Module ffi_type.get_value_from_pointer(@ptr, offset) when Symbol @ptr.send(getter_method, offset) else raise NotImplementedError end end
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# File lib/gir_ffi/zero_terminated.rb, line 74 def ffi_type @ffi_type ||= TypeMap.type_specification_to_ffi_type element_type end
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# File lib/gir_ffi/zero_terminated.rb, line 78 def ffi_type_size @ffi_type_size ||= FFI.type_size(ffi_type) end
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# File lib/gir_ffi/zero_terminated.rb, line 48 def getter_method @getter_method ||= "get_#{ffi_type}" end
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# File lib/gir_ffi/zero_terminated.rb, line 82 def null_check_strategy @null_check_strategy ||= if ffi_type == :pointer :pointer elsif ffi_type.is_a? Symbol :numeric elsif ffi_type < GirFFI::ClassBase # rubocop:disable Lint/DuplicateBranch :pointer elsif ffi_type.singleton_class.include? GirFFI::EnumBase :enum end end
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# File lib/gir_ffi/zero_terminated.rb, line 95 def null_value?(val) case null_check_strategy when :pointer val.null? when :enum ffi_type.to_native(val, nil) == 0 else val == 0 end end
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# File lib/gir_ffi/zero_terminated.rb, line 43 def read_value(offset) val = fetch_value(offset) val unless null_value? val end
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# File lib/gir_ffi/zero_terminated.rb, line 63 def wrap_value(val) case element_type when Array element_type.last.wrap val when Class element_type.wrap val else val end end