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# encoding: binary
# frozen_string_literal: true
module AMQ
# Implements pack to/unpack from 64bit string in network byte order.
# Uses native Ruby pack directives with explicit endianness (Ruby 1.9.3+).
module Pack
# Pack format strings - frozen for performance
UINT64_BE = 'Q>'.freeze # 64-bit unsigned, big-endian
INT64_BE = 'q>'.freeze # 64-bit signed, big-endian
INT16_BE = 's>'.freeze # 16-bit signed, big-endian
UINT16_BE = 'n'.freeze # 16-bit unsigned, big-endian (network order)
# Packs a 64-bit unsigned integer to big-endian binary string.
# @param long_long [Integer] The value to pack
# @return [String] 8-byte binary string in big-endian order
def self.pack_uint64_big_endian(long_long)
[long_long].pack(UINT64_BE)
end
# Unpacks a big-endian binary string to a 64-bit unsigned integer.
# @param data [String] 8-byte binary string in big-endian order
# @return [Array<Integer>] Single-element array containing the unpacked value
def self.unpack_uint64_big_endian(data)
data.unpack(UINT64_BE)
end
# Packs a 16-bit signed integer to big-endian binary string.
# @param short [Integer] The value to pack
# @return [String] 2-byte binary string in big-endian order
def self.pack_int16_big_endian(short)
[short].pack(INT16_BE)
end
# Unpacks a big-endian binary string to a 16-bit signed integer.
# @param data [String] 2-byte binary string in big-endian order
# @return [Array<Integer>] Single-element array containing the unpacked value
def self.unpack_int16_big_endian(data)
data.unpack(INT16_BE)
end
end
# Backwards compatibility alias
Hacks = Pack
end
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