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# encoding: ascii-8bit
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
module Thrift
class MemoryBufferTransport < BaseTransport
GARBAGE_BUFFER_SIZE = 4*(2**10) # 4kB
# If you pass a string to this, you should #dup that string
# unless you want it to be modified by #read and #write
#--
# this behavior is no longer required. If you wish to change it
# go ahead, just make sure the specs pass
def initialize(buffer = nil)
@buf = buffer ? Bytes.force_binary_encoding(buffer) : Bytes.empty_byte_buffer
@index = 0
end
def open?
return true
end
def open
end
def close
end
def peek
@index < @buf.size
end
# this method does not use the passed object directly but copies it
def reset_buffer(new_buf = '')
@buf.replace Bytes.force_binary_encoding(new_buf)
@index = 0
end
def available
@buf.length - @index
end
def read(len)
data = @buf.slice(@index, len)
@index += len
@index = @buf.size if @index > @buf.size
if @index >= GARBAGE_BUFFER_SIZE
@buf = @buf.slice(@index..-1)
@index = 0
end
if data.size < len
raise EOFError, "Not enough bytes remain in buffer"
end
data
end
def read_byte
raise EOFError.new("Not enough bytes remain in buffer") if @index >= @buf.size
val = Bytes.get_string_byte(@buf, @index)
@index += 1
if @index >= GARBAGE_BUFFER_SIZE
@buf = @buf.slice(@index..-1)
@index = 0
end
val
end
def read_into_buffer(buffer, size)
i = 0
while i < size
raise EOFError.new("Not enough bytes remain in buffer") if @index >= @buf.size
# The read buffer has some data now, so copy bytes over to the output buffer.
byte = Bytes.get_string_byte(@buf, @index)
Bytes.set_string_byte(buffer, i, byte)
@index += 1
i += 1
end
if @index >= GARBAGE_BUFFER_SIZE
@buf = @buf.slice(@index..-1)
@index = 0
end
i
end
def write(wbuf)
@buf << Bytes.force_binary_encoding(wbuf)
end
def flush
end
def inspect_buffer
out = []
for idx in 0...(@buf.size)
# if idx != 0
# out << " "
# end
if idx == @index
out << ">"
end
out << @buf[idx].ord.to_s(16)
end
out.join(" ")
end
def to_s
"memory"
end
end
end
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