abstract class Crystar::Reader::FileReader
- Crystar::Reader::FileReader
- IO
- Reference
- Object
Included Modules
- Crystar::FileState
Defined in:
tar/reader.crConstructors
Macro Summary
Instance Method Summary
- #io : IO
-
#read(slice : Bytes) : Int
Reads at most slice.size bytes from this
IOinto slice. -
#write(slice : Bytes) : Nil
Writes the contents of slice into this
IO. - #write_to(w : IO) : Int
Instance methods inherited from module Crystar::FileState
logical_remaining : Int64
logical_remaining,
physical_remaining : Int64
physical_remaining
Constructor Detail
Macro Detail
Instance Method Detail
abstract
def read(slice : Bytes) : Int
#
Description copied from class IO
Reads at most slice.size bytes from this IO into slice.
Returns the number of bytes read, which is 0 if and only if there is no
more data to read (so checking for 0 is the way to detect end of file).
io = IO::Memory.new "hello"
slice = Bytes.new(4)
io.read(slice) # => 4
slice # => Bytes[104, 101, 108, 108]
io.read(slice) # => 1
slice # => Bytes[111, 101, 108, 108]
io.read(slice) # => 0
def write(slice : Bytes) : Nil
#
Description copied from class IO
Writes the contents of slice into this IO.
io = IO::Memory.new
slice = Bytes.new(4) { |i| ('a'.ord + i).to_u8 }
io.write(slice)
io.to_s # => "abcd"