instiki/lib/zip/ioextras.rb

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2005-04-10 18:55:44 +02:00
module IOExtras #:nodoc:
# Implements kind_of? in order to pretend to be an IO object
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module FakeIO
def kind_of?(object)
object == IO || super
end
end
# Implements many of the convenience methods of IO
# such as gets, getc, readline and readlines
# depends on: input_finished?, produce_input and read
module AbstractInputStream
include Enumerable
include FakeIO
def initialize
super
@lineno = 0
@outputBuffer = ""
end
attr_accessor :lineno
def readlines(aSepString = $/)
retVal = []
each_line(aSepString) { |line| retVal << line }
return retVal
end
def gets(aSepString=$/)
@lineno = @lineno.next
return read if aSepString == nil
aSepString="#{$/}#{$/}" if aSepString == ""
bufferIndex=0
while ((matchIndex = @outputBuffer.index(aSepString, bufferIndex)) == nil)
bufferIndex=@outputBuffer.length
if input_finished?
return @outputBuffer.empty? ? nil : flush
end
@outputBuffer << produce_input
end
sepIndex=matchIndex + aSepString.length
return @outputBuffer.slice!(0...sepIndex)
end
def flush
retVal=@outputBuffer
@outputBuffer=""
return retVal
end
def readline(aSepString = $/)
retVal = gets(aSepString)
raise EOFError if retVal == nil
return retVal
end
def each_line(aSepString = $/)
while true
yield readline(aSepString)
end
rescue EOFError
end
alias_method :each, :each_line
end
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# Implements many of the output convenience methods of IO.
# relies on <<
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module AbstractOutputStream
include FakeIO
def write(data)
self << data
data.to_s.length
end
def print(*params)
self << params.to_s << $\.to_s
end
def printf(aFormatString, *params)
self << sprintf(aFormatString, *params)
end
def putc(anObject)
self << case anObject
when Fixnum then anObject.chr
when String then anObject
else raise TypeError, "putc: Only Fixnum and String supported"
end
anObject
end
def puts(*params)
params << "\n" if params.empty?
params.flatten.each {
|element|
val = element.to_s
self << val
self << "\n" unless val[-1,1] == "\n"
}
end
end
end # IOExtras namespace module
# Copyright (C) 2002-2004 Thomas Sondergaard
# rubyzip is free software; you can redistribute it and/or
# modify it under the terms of the ruby license.