# Port

Port is abstract class to encapsulate mail resources.

## Methods

ropen
  opens stream to read.
wopen
  opens stream to write.
aopen
  opens stream to append.

# FilePort

# StringPort

# Stream

each {|line| ... }
  iterates for each lines.
read( size )
  reads string of SIZE.
read_all
  reads all contents from stream.

# FileIStream

# FileOStream

# StringIStream

# StringOStream

Copyright (c) 1998-2001 Minero Aoki <aamine@dp.u-netsurf.ne.jp>