allow IO write to write memoryview object without copying or add IO#write_memoryview
dsisnero opened this issue · comments
dsisnero commented
as seen on rubybugs #17832 -
IO#write()
- arguments that are not a string will be converted to string using to_s
want IO#write
to be able to write memoryview objects without conversion to string
require` 'fiddle'
include Fiddle
ptr = Fiddle::Pointer['this is a string']
mv = MemoryView.new ptr
mv.byte_size #17802
mv[0] # 116
'this is a string'.bytes[0] = 116
File.open('test.txt', 'wb'){ f.write mv}
contents = File.open('test.txt', 'r'){ |f| f.read} # contents is "#<Fiddle::MemoryView:0x000001a75ae76258>" not 'this is a string'
buffer = ByteBuffer.new('this is a string')
File.open('test.txt', 'w'){|f| f.write Fiddle::MemoryView.new(buffer)}
allow IO#write to write memoryview objects without converting to string or add a new method on IO to write memoryview objects without converting to string
Sutou Kouhei commented
Thanks for your report.
We can do this now. Fiddle::MemoryView#to_s
returns a String
but it doesn't copy underlying data.