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yzyCli/u3d/Lua/tolua/protobuf/encoder.lua

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-- --
-- --------------------------------------------------------------------------------
-- -- FILE: encoder.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29日 19时30分46秒 CST
-- --------------------------------------------------------------------------------
-- --
-- local string = string
-- local table = table
-- local ipairs = ipairs
-- local assert =assert
-- local pb = require "pb"
-- local wire_format = require "protobuf.wire_format"
-- module "protobuf.encoder"
-- function _VarintSize(value)
-- if value <= 0x7f then return 1 end
-- if value <= 0x3fff then return 2 end
-- if value <= 0x1fffff then return 3 end
-- if value <= 0xfffffff then return 4 end
-- return 5
-- end
-- function _SignedVarintSize(value)
-- if value < 0 then return 10 end
-- if value <= 0x7f then return 1 end
-- if value <= 0x3fff then return 2 end
-- if value <= 0x1fffff then return 3 end
-- if value <= 0xfffffff then return 4 end
-- return 5
-- end
-- function _TagSize(field_number)
-- return _VarintSize(wire_format.PackTag(field_number, 0))
-- end
-- function _SimpleSizer(compute_value_size)
-- return function(field_number, is_repeated, is_packed)
-- local tag_size = _TagSize(field_number)
-- if is_packed then
-- local VarintSize = _VarintSize
-- return function(value)
-- local result = 0
-- for _, element in ipairs(value) do
-- result = result + compute_value_size(element)
-- end
-- return result + VarintSize(result) + tag_size
-- end
-- elseif is_repeated then
-- return function(value)
-- local result = tag_size * #value
-- for _, element in ipairs(value) do
-- result = result + compute_value_size(element)
-- end
-- return result
-- end
-- else
-- return function (value)
-- return tag_size + compute_value_size(value)
-- end
-- end
-- end
-- end
-- function _ModifiedSizer(compute_value_size, modify_value)
-- return function (field_number, is_repeated, is_packed)
-- local tag_size = _TagSize(field_number)
-- if is_packed then
-- local VarintSize = _VarintSize
-- return function (value)
-- local result = 0
-- for _, element in ipairs(value) do
-- result = result + compute_value_size(modify_value(element))
-- end
-- return result + VarintSize(result) + tag_size
-- end
-- elseif is_repeated then
-- return function (value)
-- local result = tag_size * #value
-- for _, element in ipairs(value) do
-- result = result + compute_value_size(modify_value(element))
-- end
-- return result
-- end
-- else
-- return function (value)
-- return tag_size + compute_value_size(modify_value(value))
-- end
-- end
-- end
-- end
-- function _FixedSizer(value_size)
-- return function (field_number, is_repeated, is_packed)
-- local tag_size = _TagSize(field_number)
-- if is_packed then
-- local VarintSize = _VarintSize
-- return function (value)
-- local result = #value * value_size
-- return result + VarintSize(result) + tag_size
-- end
-- elseif is_repeated then
-- local element_size = value_size + tag_size
-- return function(value)
-- return #value * element_size
-- end
-- else
-- local field_size = value_size + tag_size
-- return function (value)
-- return field_size
-- end
-- end
-- end
-- end
-- Int32Sizer = _SimpleSizer(_SignedVarintSize)
-- Int64Sizer = Int32Sizer
-- EnumSizer = Int32Sizer
-- UInt32Sizer = _SimpleSizer(_VarintSize)
-- UInt64Sizer = UInt32Sizer
-- SInt32Sizer = _ModifiedSizer(_SignedVarintSize, wire_format.ZigZagEncode)
-- SInt64Sizer = SInt32Sizer
-- Fixed32Sizer = _FixedSizer(4)
-- SFixed32Sizer = Fixed32Sizer
-- FloatSizer = Fixed32Sizer
-- Fixed64Sizer = _FixedSizer(8)
-- SFixed64Sizer = Fixed64Sizer
-- DoubleSizer = Fixed64Sizer
-- BoolSizer = _FixedSizer(1)
-- function StringSizer(field_number, is_repeated, is_packed)
-- local tag_size = _TagSize(field_number)
-- local VarintSize = _VarintSize
-- assert(not is_packed)
-- if is_repeated then
-- return function(value)
-- local result = tag_size * #value
-- for _, element in ipairs(value) do
-- local l = #element
-- result = result + VarintSize(l) + l
-- end
-- return result
-- end
-- else
-- return function(value)
-- local l = #value
-- return tag_size + VarintSize(l) + l
-- end
-- end
-- end
-- function BytesSizer(field_number, is_repeated, is_packed)
-- local tag_size = _TagSize(field_number)
-- local VarintSize = _VarintSize
-- assert(not is_packed)
-- if is_repeated then
-- return function (value)
-- local result = tag_size * #value
-- for _,element in ipairs(value) do
-- local l = #element
-- result = result + VarintSize(l) + l
-- end
-- return result
-- end
-- else
-- return function (value)
-- local l = #value
-- return tag_size + VarintSize(l) + l
-- end
-- end
-- end
-- function MessageSizer(field_number, is_repeated, is_packed)
-- local tag_size = _TagSize(field_number)
-- local VarintSize = _VarintSize
-- assert(not is_packed)
-- if is_repeated then
-- return function(value)
-- local result = tag_size * #value
-- for _,element in ipairs(value) do
-- local l = element:ByteSize()
-- result = result + VarintSize(l) + l
-- end
-- return result
-- end
-- else
-- return function (value)
-- local l = value:ByteSize()
-- return tag_size + VarintSize(l) + l
-- end
-- end
-- end
-- -- ====================================================================
-- -- Encoders!
-- local _EncodeVarint = pb.varint_encoder
-- local _EncodeSignedVarint = pb.signed_varint_encoder
-- local _EncodeVarint64 = pb.varint_encoder64
-- local _EncodeSignedVarint64 = pb.signed_varint_encoder64
-- function _VarintBytes(value)
-- local out = {}
-- local write = function(value)
-- out[#out + 1 ] = value
-- end
-- _EncodeSignedVarint(write, value)
-- return table.concat(out)
-- end
-- function TagBytes(field_number, wire_type)
-- return _VarintBytes(wire_format.PackTag(field_number, wire_type))
-- end
-- function _SimpleEncoder(wire_type, encode_value, compute_value_size)
-- return function(field_number, is_repeated, is_packed)
-- if is_packed then
-- local tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
-- local EncodeVarint = _EncodeVarint
-- return function(write, value)
-- write(tag_bytes)
-- local size = 0
-- for _, element in ipairs(value) do
-- size = size + compute_value_size(element)
-- end
-- EncodeVarint(write, size)
-- for element in value do
-- encode_value(write, element)
-- end
-- end
-- elseif is_repeated then
-- local tag_bytes = TagBytes(field_number, wire_type)
-- return function(write, value)
-- for _, element in ipairs(value) do
-- write(tag_bytes)
-- encode_value(write, element)
-- end
-- end
-- else
-- local tag_bytes = TagBytes(field_number, wire_type)
-- return function(write, value)
-- write(tag_bytes)
-- encode_value(write, value)
-- end
-- end
-- end
-- end
-- function _ModifiedEncoder(wire_type, encode_value, compute_value_size, modify_value)
-- return function (field_number, is_repeated, is_packed)
-- if is_packed then
-- local tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
-- local EncodeVarint = _EncodeVarint
-- return function (write, value)
-- write(tag_bytes)
-- local size = 0
-- for _, element in ipairs(value) do
-- size = size + compute_value_size(modify_value(element))
-- end
-- EncodeVarint(write, size)
-- for _, element in ipairs(value) do
-- encode_value(write, modify_value(element))
-- end
-- end
-- elseif is_repeated then
-- local tag_bytes = TagBytes(field_number, wire_type)
-- return function (write, value)
-- for _, element in ipairs(value) do
-- write(tag_bytes)
-- encode_value(write, modify_value(element))
-- end
-- end
-- else
-- local tag_bytes = TagBytes(field_number, wire_type)
-- return function (write, value)
-- write(tag_bytes)
-- encode_value(write, modify_value(value))
-- end
-- end
-- end
-- end
-- function _StructPackEncoder(wire_type, value_size, format)
-- return function(field_number, is_repeated, is_packed)
-- local struct_pack = pb.struct_pack
-- if is_packed then
-- local tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
-- local EncodeVarint = _EncodeVarint
-- return function (write, value)
-- write(tag_bytes)
-- EncodeVarint(write, #value * value_size)
-- for _, element in ipairs(value) do
-- struct_pack(write, format, element)
-- end
-- end
-- elseif is_repeated then
-- local tag_bytes = TagBytes(field_number, wire_type)
-- return function (write, value)
-- for _, element in ipairs(value) do
-- write(tag_bytes)
-- struct_pack(write, format, element)
-- end
-- end
-- else
-- local tag_bytes = TagBytes(field_number, wire_type)
-- return function (write, value)
-- write(tag_bytes)
-- struct_pack(write, format, value)
-- end
-- end
-- end
-- end
-- Int32Encoder = _SimpleEncoder(wire_format.WIRETYPE_VARINT, _EncodeSignedVarint, _SignedVarintSize)
-- Int64Encoder = _SimpleEncoder(wire_format.WIRETYPE_VARINT, _EncodeSignedVarint64, _SignedVarintSize)
-- EnumEncoder = Int32Encoder
-- UInt32Encoder = _SimpleEncoder(wire_format.WIRETYPE_VARINT, _EncodeVarint, _VarintSize)
-- UInt64Encoder = _SimpleEncoder(wire_format.WIRETYPE_VARINT, _EncodeVarint64, _VarintSize)
-- SInt32Encoder = _ModifiedEncoder(
-- wire_format.WIRETYPE_VARINT, _EncodeVarint, _VarintSize,
-- wire_format.ZigZagEncode32)
-- SInt64Encoder = _ModifiedEncoder(
-- wire_format.WIRETYPE_VARINT, _EncodeVarint64, _VarintSize,
-- wire_format.ZigZagEncode64)
-- Fixed32Encoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED32, 4, string.byte('I'))
-- Fixed64Encoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED64, 8, string.byte('Q'))
-- SFixed32Encoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED32, 4, string.byte('i'))
-- SFixed64Encoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED64, 8, string.byte('q'))
-- FloatEncoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED32, 4, string.byte('f'))
-- DoubleEncoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED64, 8, string.byte('d'))
-- function BoolEncoder(field_number, is_repeated, is_packed)
-- local false_byte = '\0'
-- local true_byte = '\1'
-- if is_packed then
-- local tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
-- local EncodeVarint = _EncodeVarint
-- return function (write, value)
-- write(tag_bytes)
-- EncodeVarint(write, #value)
-- for _, element in ipairs(value) do
-- if element then
-- write(true_byte)
-- else
-- write(false_byte)
-- end
-- end
-- end
-- elseif is_repeated then
-- local tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_VARINT)
-- return function(write, value)
-- for _, element in ipairs(value) do
-- write(tag_bytes)
-- if element then
-- write(true_byte)
-- else
-- write(false_byte)
-- end
-- end
-- end
-- else
-- local tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_VARINT)
-- return function (write, value)
-- write(tag_bytes)
-- if value then
-- return write(true_byte)
-- end
-- return write(false_byte)
-- end
-- end
-- end
-- function StringEncoder(field_number, is_repeated, is_packed)
-- local tag = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
-- local EncodeVarint = _EncodeVarint
-- assert(not is_packed)
-- if is_repeated then
-- return function (write, value)
-- for _, element in ipairs(value) do
-- -- encoded = element.encode('utf-8')
-- write(tag)
-- EncodeVarint(write, #element)
-- write(element)
-- end
-- end
-- else
-- return function (write, value)
-- -- local encoded = value.encode('utf-8')
-- write(tag)
-- EncodeVarint(write, #value)
-- return write(value)
-- end
-- end
-- end
-- function BytesEncoder(field_number, is_repeated, is_packed)
-- local tag = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
-- local EncodeVarint = _EncodeVarint
-- assert(not is_packed)
-- if is_repeated then
-- return function (write, value)
-- for _, element in ipairs(value) do
-- write(tag)
-- EncodeVarint(write, #element)
-- write(element)
-- end
-- end
-- else
-- return function(write, value)
-- write(tag)
-- EncodeVarint(write, #value)
-- return write(value)
-- end
-- end
-- end
-- function MessageEncoder(field_number, is_repeated, is_packed)
-- local tag = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
-- local EncodeVarint = _EncodeVarint
-- assert(not is_packed)
-- if is_repeated then
-- return function(write, value)
-- for _, element in ipairs(value) do
-- write(tag)
-- EncodeVarint(write, element:ByteSize())
-- element:_InternalSerialize(write)
-- end
-- end
-- else
-- return function (write, value)
-- write(tag)
-- EncodeVarint(write, value:ByteSize())
-- return value:_InternalSerialize(write)
-- end
-- end
-- end