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Cleanup PassTruDecompressor

This commit is contained in:
Jan-Joost Spanjers 2019-12-29 13:06:50 +01:00
parent 4ac83737b1
commit 2bbcec0e34
1 changed files with 11 additions and 8 deletions
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19
lib/zip/pass_thru_decompressor.rb
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@ -1,13 +1,15 @@
module Zip
class PassThruDecompressor < Decompressor #:nodoc:all
def initialize(input_stream, chars_to_read)
attr_reader :decompressed_size
def initialize(input_stream, decompressed_size)
super(input_stream)
@chars_to_read = chars_to_read
@decompressed_size = decompressed_size
@read_so_far = 0
@has_returned_empty_string = false
end
def sysread(number_of_bytes = nil, buf = '')
def sysread(length = nil, outbuf = '')
if eof?
has_returned_empty_string_val = @has_returned_empty_string
@has_returned_empty_string = true
@ -15,15 +17,16 @@ module Zip
return
end
if number_of_bytes.nil? || @read_so_far + number_of_bytes > @chars_to_read
number_of_bytes = @chars_to_read - @read_so_far
if length.nil? || (@read_so_far + length) > decompressed_size
length = decompressed_size - @read_so_far
end
@read_so_far += number_of_bytes
@input_stream.read(number_of_bytes, buf)
@read_so_far += length
@input_stream.read(length, outbuf)
end
def eof
@read_so_far >= @chars_to_read
@read_so_far >= decompressed_size
end
alias_method :eof?, :eof