Class: Krypt::Hex::Decoder
Overview
Hex-decodes any data written or read from it in the process.
Example: Reading and decoding hex-encoded data from a file
f = File.open("hex", "rb")
hex = Krypt::Hex::Decoder.new(f)
plain = hex.read # => result is decoded
hex.close
Example: Writing to a file while hex-decoding the data
f = File.open("document", "wb")
hex = Krypt::Hex::Decoder.new(f)
hexdata = ... #some hex-encoded data
hex << hexdata
hex.close # => contents in file will be decoded
Instance Method Summary collapse
- #close ⇒ Object
-
#read(len = nil) ⇒ Object
call-seq: in.read(, [buf=nil]) -> String or nil.
-
#write(data) ⇒ Object
(also: #<<)
call-seq: out.write(string) -> Integer .
Methods included from BaseCodec
#generic_read, #generic_write, #update_buffer
Methods inherited from IOFilter
Constructor Details
This class inherits a constructor from Krypt::IOFilter
Instance Method Details
#close ⇒ Object
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# File 'lib/krypt/codec/hex.rb', line 116 def close generic_close super end |
#read(len = nil) ⇒ Object
call-seq:
in.read([len=nil], [buf=nil]) -> String or nil
Reads from the underlying IO and hex-decodes the data. Please see IO#read for further details. Note that in-place reading into a buffer is not supported.
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# File 'lib/krypt/codec/hex.rb', line 99 def read(len=nil) read_len = len ? compute_decode_read_len(len) : nil generic_read(len, read_len) { |data| Krypt::Hex.decode(data) } end |
#write(data) ⇒ Object Also known as: <<
call-seq:
out.write(string) -> Integer
Hex-decodes string and writes it to the underlying IO. Please see IO#write for further details.
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# File 'lib/krypt/codec/hex.rb', line 111 def write(data) generic_write(data, 2) { |data| Krypt::Hex.decode(data) } end |