-- --
-- --------------------------------------------------------------------------------
-- --  FILE:  wire_format.lua
-- --  DESCRIPTION:  protoc-gen-lua
-- --      Google's Protocol Buffers project, ported to lua.
-- --      https://code.google.com/p/protoc-gen-lua/
-- --
-- --      Copyright (c) 2010 , 林卓毅 (Zhuoyi Lin) netsnail@gmail.com
-- --      All rights reserved.
-- --
-- --      Use, modification and distribution are subject to the "New BSD License"
-- --      as listed at <url: http://www.opensource.org/licenses/bsd-license.php >.
-- --  COMPANY:  NetEase
-- --  CREATED:  2010年07月30日 15时59分53秒 CST
-- --------------------------------------------------------------------------------
-- --

-- local pb = require "pb"
-- module "protobuf.wire_format"

-- WIRETYPE_VARINT = 0
-- WIRETYPE_FIXED64 = 1
-- WIRETYPE_LENGTH_DELIMITED = 2
-- WIRETYPE_START_GROUP = 3
-- WIRETYPE_END_GROUP = 4
-- WIRETYPE_FIXED32 = 5
-- _WIRETYPE_MAX = 5


-- -- yeah, we don't need uint64
-- local function _VarUInt64ByteSizeNoTag(uint64)
--     if uint64 <= 0x7f then return 1 end
--     if uint64 <= 0x3fff then return 2 end
--     if uint64 <= 0x1fffff then return 3 end
--     if uint64 <= 0xfffffff then return 4 end
--     return 5
-- end

-- function PackTag(field_number, wire_type)
--     return field_number * 8 + wire_type
-- end

-- function UnpackTag(tag)
--     local wire_type = tag % 8
--     return (tag - wire_type) / 8, wire_type
-- end

-- ZigZagEncode32 = pb.zig_zag_encode32
-- ZigZagDecode32 = pb.zig_zag_decode32
-- ZigZagEncode64 = pb.zig_zag_encode64
-- ZigZagDecode64 = pb.zig_zag_decode64

-- function Int32ByteSize(field_number, int32)
--   return Int64ByteSize(field_number, int32)
-- end

-- function Int32ByteSizeNoTag(int32)
--   return _VarUInt64ByteSizeNoTag(int32)
-- end

-- function Int64ByteSize(field_number, int64)
--   return UInt64ByteSize(field_number, int64)
-- end

-- function UInt32ByteSize(field_number, uint32)
--   return UInt64ByteSize(field_number, uint32)
-- end

-- function UInt64ByteSize(field_number, uint64)
--   return TagByteSize(field_number) + _VarUInt64ByteSizeNoTag(uint64)
-- end

-- function SInt32ByteSize(field_number, int32)
--   return UInt32ByteSize(field_number, ZigZagEncode(int32))
-- end

-- function SInt64ByteSize(field_number, int64)
--   return UInt64ByteSize(field_number, ZigZagEncode(int64))
-- end

-- function Fixed32ByteSize(field_number, fixed32)
--   return TagByteSize(field_number) + 4
-- end

-- function Fixed64ByteSize(field_number, fixed64)
--   return TagByteSize(field_number) + 8
-- end

-- function SFixed32ByteSize(field_number, sfixed32)
--   return TagByteSize(field_number) + 4
-- end

-- function SFixed64ByteSize(field_number, sfixed64)
--   return TagByteSize(field_number) + 8
-- end

-- function FloatByteSize(field_number, flt)
--   return TagByteSize(field_number) + 4
-- end

-- function DoubleByteSize(field_number, double)
--   return TagByteSize(field_number) + 8
-- end

-- function BoolByteSize(field_number, b)
--   return TagByteSize(field_number) + 1
-- end

-- function EnumByteSize(field_number, enum)
--   return UInt32ByteSize(field_number, enum)
-- end

-- function StringByteSize(field_number, string)
--   return BytesByteSize(field_number, string)
-- end

-- function BytesByteSize(field_number, b)
--     return TagByteSize(field_number) + _VarUInt64ByteSizeNoTag(#b) + #b
-- end

-- function MessageByteSize(field_number, message)
--     return TagByteSize(field_number) + _VarUInt64ByteSizeNoTag(message.ByteSize()) + message.ByteSize()
-- end

-- function MessageSetItemByteSize(field_number, msg)
--     local total_size = 2 * TagByteSize(1) + TagByteSize(2) + TagByteSize(3) 
--     total_size = total_size + _VarUInt64ByteSizeNoTag(field_number)
--     local message_size = msg.ByteSize()
--     total_size = total_size + _VarUInt64ByteSizeNoTag(message_size)
--     total_size = total_size + message_size
--     return total_size
-- end

-- function TagByteSize(field_number)
--     return _VarUInt64ByteSizeNoTag(PackTag(field_number, 0))
-- end