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# encoding: binary
require 'amq/endianness'
module AMQ
# Implements pack to/unpack from 64bit string in network byte order
# compatible with Ruby 1.8+.
module Pack
UINT64 = "Q".freeze
UINT16_BE = "n".freeze
INT16 = "c".freeze
if Endianness.big_endian?
def self.pack_uint64_big_endian(long_long)
[long_long].pack(UINT64)
end
def self.unpack_uint64_big_endian(data)
data.unpack(UINT64)
end
def self.pack_int16_big_endian(short)
[long_long].pack(INT16)
end
def self.unpack_int16_big_endian(data)
data.unpack(INT16)
end
else
def self.pack_uint64_big_endian(long_long)
result = [long_long].pack(UINT64)
result.bytes.to_a.reverse.map(&:chr).join
end
def self.unpack_uint64_big_endian(data)
data = data.bytes.to_a.reverse.map(&:chr).join
data.unpack(UINT64)
end
def self.pack_int16_big_endian(short)
result = [long_long].pack(INT16)
result.bytes.to_a.reverse.map(&:chr).join
end
def self.unpack_int16_big_endian(data)
value = data.bytes.to_a.map(&:chr).join.unpack(UINT16_BE)[0]
[(value & ~(1 << 15)) - (value & (1 << 15))]
end
end
end
# Backwards compatibility
Hacks = Pack
end
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