Class: StringIO

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# File 'opal/stdlib/stringio.rb', line 14
def initialize(string = "", mode = 'rw')
 @string = string
 @position = 0
 super(nil, mode)
end

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# File 'opal/stdlib/stringio.rb', line 12
def string
 @string
end

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# File 'opal/stdlib/stringio.rb', line 4
def self.open(string = "", mode = nil, &block)
 io = new(string, mode)
 res = block.call(io)
 io.close
 res
end

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# File 'opal/stdlib/stringio.rb', line 21
def eof?
 check_readable
 @position == @string.length
end

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# File 'opal/stdlib/stringio.rb', line 83
def read(length = nil, outbuf = nil)
 check_readable
 return if eof?
 string = if length
 str = @string[@position, length]
 @position += length
 @position = @string.length if @position > @string.length
 str
 else
 str = @string[@position .. -1]
 @position = @string.length
 str
 end
 if outbuf
 outbuf.write(string)
 else
 string
 end
end

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# File 'opal/stdlib/stringio.rb', line 59
def rewind
 seek 0
end

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# File 'opal/stdlib/stringio.rb', line 27
def seek(pos, whence = IO ::SEEK_SET)
 # Let's reset the read buffer, because it will be most likely wrong
 @read_buffer = ''
 case whence
 when IO ::SEEK_SET
 raise Errno::EINVAL unless pos >= 0
 @position = pos
 when IO ::SEEK_CUR
 if @position + pos > @string.length
 @position = @string.length
 else
 @position += pos
 end
 when IO ::SEEK_END
 if pos > @string.length
 @position = 0
 else
 @position -= pos
 end
 end
 0
end

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# File 'opal/stdlib/stringio.rb', line 106
def sysread(length)
 check_readable
 read(length)
end

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# File 'opal/stdlib/stringio.rb', line 55
def tell
 @position
end

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# File 'opal/stdlib/stringio.rb', line 63
def write(string)
 check_writable
 # Let's reset the read buffer, because it will be most likely wrong
 @read_buffer = ''
 string = String (string)
 if @string.length == @position
 @string += string
 @position += string.length
 else
 before = @string[0 .. @position - 1]
 after = @string[@position + string.length .. -1]
 @string = before + string + after
 @position += string.length
 end
end