/usr/lib/ruby/vendor_ruby/qrack/transport/buffer09.rb is in ruby-bunny 0.7.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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if [].map.respond_to? :with_index
class Array #:nodoc:
def enum_with_index
each.with_index
end
end
else
require 'enumerator'
end
module Qrack
module Transport09 #:nodoc: all
class Buffer
def initialize data = ''
@data = data
@pos = 0
end
attr_reader :pos
def data
@data.clone
end
alias :contents :data
alias :to_s :data
def << data
@data << data.to_s
self
end
def length
@data.bytesize
end
def empty?
pos == length
end
def rewind
@pos = 0
end
def read_properties *types
types.shift if types.first == :properties
i = 0
values = []
while props = read(:short)
(0..14).each do |n|
# no more property types
break unless types[i]
# if flag is set
if props & (1<<(15-n)) != 0
if types[i] == :bit
# bit values exist in flags only
values << true
else
# save type name for later reading
values << types[i]
end
else
# property not set or is false bit
values << (types[i] == :bit ? false : nil)
end
i+=1
end
# bit(0) == 0 means no more property flags
break unless props & 1 == 1
end
values.map do |value|
value.is_a?(Symbol) ? read(value) : value
end
end
def read *types
if types.first == :properties
return read_properties(*types)
end
values = types.map do |type|
case type
when :octet
_read(1, 'C')
when :short
_read(2, 'n')
when :long
_read(4, 'N')
when :longlong
upper, lower = _read(8, 'NN')
upper << 32 | lower
when :shortstr
_read read(:octet)
when :longstr
_read read(:long)
when :timestamp
Time.at read(:longlong)
when :table
t = Hash.new
table = Buffer.new(read(:longstr))
until table.empty?
key, type = table.read(:shortstr, :octet)
key = key.intern
t[key] ||= case type
when 83 # 'S'
table.read(:longstr)
when 73 # 'I'
table.read(:long)
when 68 # 'D'
exp = table.read(:octet)
num = table.read(:long)
num / 10.0**exp
when 84 # 'T'
table.read(:timestamp)
when 70 # 'F'
table.read(:table)
when 116 # 't'
table.read(:octet)
end
end
t
when :bit
if (@bits ||= []).empty?
val = read(:octet)
@bits = (0..7).map{|i| (val & (1 << i)) != 0 }
end
@bits.shift
else
raise Qrack::InvalidTypeError, "Cannot read data of type #{type}"
end
end
types.size == 1 ? values.first : values
end
def write type, data
case type
when :octet
_write(data, 'C')
when :short
_write(data, 'n')
when :long
_write(data, 'N')
when :longlong
lower = data & 0xffffffff
upper = (data & ~0xffffffff) >> 32
_write([upper, lower], 'NN')
when :shortstr
data = (data || '').to_s
_write([data.bytesize, data], 'Ca*')
when :longstr
if data.is_a? Hash
write(:table, data)
else
data = (data || '').to_s
_write([data.bytesize, data], 'Na*')
end
when :timestamp
write(:longlong, data.to_i)
when :table
data ||= {}
write :longstr, (data.inject(Buffer.new) do |table, (key, value)|
table.write(:shortstr, key.to_s)
case value
when String
table.write(:octet, 83) # 'S'
table.write(:longstr, value.to_s)
when Fixnum
table.write(:octet, 73) # 'I'
table.write(:long, value)
when Float
table.write(:octet, 68) # 'D'
# XXX there's gotta be a better way to do this..
exp = value.to_s.split('.').last.bytesize
num = value * 10**exp
table.write(:octet, exp)
table.write(:long, num)
when Time
table.write(:octet, 84) # 'T'
table.write(:timestamp, value)
when Hash
table.write(:octet, 70) # 'F'
table.write(:table, value)
end
table
end)
when :bit
[*data].to_enum(:each_slice, 8).each{|bits|
write(:octet, bits.enum_with_index.inject(0){ |byte, (bit, i)|
byte |= (1 << i) if bit
byte
})
}
when :properties
values = []
data.enum_with_index.inject(0) do |short, ((type, value), i)|
n = i % 15
last = i+1 == data.size
if (n == 0 and i != 0) or last
if data.size > i+1
short |= (1 << 0)
elsif last and value
values << [type,value]
short |= 1<<(15-n)
end
write(:short, short)
short = 0
end
if value and !last
values << [type,value]
short |= 1<<(15-n)
end
short
end
values.each do |type, value|
write(type, value) unless type == :bit
end
else
raise Qrack::InvalidTypeError, "Cannot write data of type #{type}"
end
self
end
def extract
begin
cur_data, cur_pos = @data.clone, @pos
yield self
rescue Qrack::BufferOverflowError
@data, @pos = cur_data, cur_pos
nil
end
end
def _read(size, pack = nil)
if @data.is_a?(Qrack::Client)
raw = @data.read(size)
return raw if raw.nil? or pack.nil?
return raw.unpack(pack).first
end
if @pos + size > length
raise Qrack::BufferOverflowError
else
data = @data[@pos,size]
@data[@pos,size] = ''
if pack
data = data.unpack(pack)
data = data.pop if data.size == 1
end
data
end
end
def _write data, pack = nil
data = [*data].pack(pack) if pack
@data[@pos,0] = data
@pos += data.bytesize
end
end
end
end
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