protoc-gen-lua
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int64 encoder _VarintSize error!
有64位字段的message,里面数值很大时 在计算 bytesize时出错, 应该是之前代码没兼容64位
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
may need to change:
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 if value <= 0x7ffffffff then return 5 end if value <= 0x3ffffffffff then return 6 end if value <= 0x1ffffffffffff then return 7 end if value <= 0xffffffffffffff then return 8 end if value <= 0x7fffffffffffffff then return 9 end return 10 end
不知道这样改可行不可行?
@zhenmu
我今天也遇到你这个问题,测试发现这样改没有效果。
@cp790621656
我看了一下我们项目里完整的修改
1.encoder.lua
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
改成
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 if value <= 0x7ffffffff then return 5 end if value <= 0x3ffffffffff then return 6 end if value <= 0x1ffffffffffff then return 7 end if value <= 0xffffffffffffff then return 8 end if value <= 0x7fffffffffffffff then return 9 end return 10 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 if value <= 0x7ffffffff then return 5 end if value <= 0x3ffffffffff then return 6 end if value <= 0x1ffffffffffff then return 7 end if value <= 0xffffffffffffff then return 8 end if value <= 0x7fffffffffffffff then return 9 end return 10 end
2.ware_format里 (非必要?)
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
改成
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 if uint64 <= 0x7ffffffff then return 5 end if uint64 <= 0x3ffffffffff then return 6 end if uint64 <= 0x1ffffffffffff then return 7 end if uint64 <= 0xffffffffffffff then return 8 end if uint64 <= 0x7fffffffffffffff then return 9 end return 10 end
- type_checkers.lua里 (这个范围是我们自己根据一些情况 设定了一个范围) 增加
function Int64ValueChecker() local _MIN = -562949953421312 local _MAX = 562949953421312 return function(proposed_value) if type(proposed_value) ~= 'number' then error(string.format('%s has type %s, but expected one of: number', proposed_value, type(proposed_value))) end if _MIN > proposed_value or proposed_value > _MAX then error('Value out of range: ' .. proposed_value) end end end
function Uint64ValueChecker(IntValueChecker) local _MIN = 0 local _MAX = 1125899906842624
return function(proposed_value) if type(proposed_value) ~= 'number' then error(string.format('%s has type %s, but expected one of: number', proposed_value, type(proposed_value))) end if _MIN > proposed_value or proposed_value > _MAX then error('Value out of range: ' .. proposed_value) end end
end
4.protobuf.lua 里
[FieldDescriptor.CPPTYPE_INT64] = type_checkers.Int32ValueChecker(), [FieldDescriptor.CPPTYPE_UINT64] = type_checkers.Uint32ValueChecker(),
改成
[FieldDescriptor.CPPTYPE_INT64] = type_checkers.Int64ValueChecker(), [FieldDescriptor.CPPTYPE_UINT64] = type_checkers.Uint64ValueChecker(),
仅供参考
测试OK啦,安卓上也测试OK,非常感谢您!! @zhenmu
测试可用,感谢楼主
如上修改 发现,java后端传来的long型数值,在客户端解析的数据溢出
最大支持50位。
最大支持50位。
为什么最大是50位呀,哪里有限制的呢,不是真的int64呢
最大支持50位。
为什么最大是50位呀,哪里有限制的呢,不是真的int64呢
lua存放数值这类的都是用double的