tolua lua 添加 C库的byte[] 解析 byteArray ipack

jquave · 发表于 2023-4-9 10:22

为了方式封装和解析二进制数据给tolua添加 ipack库和一个lua的解析类 ByteArray
在lua中解析byte[]数据
ipcak https://github.com/LuaDist/lpack
参考 https://forum.cocos.com/t/bytearray/14319
1 从git上获得 ipack库
ipcak 库修改

2 在tolua-runtime库 https://github.com/topameng/tolua_runtime
添加ipack 注册找到tolua.c文件 tolua_openlibs方法添加这个方法

3 生成对应平台的库文件这个教程后期出不过需要这个功能的人应该也是会的
4 添加LUA代码
ipack =require 'ipack'local setmetatable = setmetatablelocal ByteArray ={}ByteArray.__index = ByteArraylocal typeEnum={ OP_ZSTRING= 'z',--/* zero-terminated string */ OP_BSTRING= 'p',--/* string preceded by length byte */ OP_WSTRING= 'P',--/* string preceded by length word */ OP_SSTRING= 'a',--/* string preceded by length size_t */ OP_STRING= 'A',--/* string */ OP_FLOAT= 'f',--/* float */ OP_DOUBLE= 'd',--/* double */ OP_NUMBER= 'n',--/* Lua number */ OP_BYTE = 'c',--/* char is byte*/ OP_UBYTE = 'b',--/* byte = unsigned char */ OP_SHORT ='h',--/* short */ OP_USHORT= 'H',--/* unsigned short */ OP_INT = 'i',--/* int */ OP_UINT = 'I',--/* unsigned int */ OP_LONG = 'l',--/* long */ OP_ULONG= 'L',--/* unsigned long */ OP_LITTLEENDIAN= '<',--/* little endian */ OP_BIGENDIAN= '>',--/* big endian */ OP_NATIVE= '=',--/* native endian */}--local OP_ZSTRING= 'z'--/* zero-terminated string */--local OP_BSTRING= 'p'--/* string preceded by length byte */--local OP_WSTRING= 'P'--/* string preceded by length word */--local OP_SSTRING= 'a'--/* string preceded by length size_t */--local OP_STRING= 'A'--/* string */--local OP_FLOAT= 'f'--/* float */--local OP_DOUBLE= 'd'--/* double */--local OP_NUMBER= 'n'--/* Lua number */--local OP_CHAR = 'c'--/* char */--local OP_BYTE = 'b'--/* byte = unsigned char */--local OP_SHORT ='h'--/* short */--local OP_USHORT= 'H'--/* unsigned short */--local OP_INT = 'i'--/* int */--local OP_UINT = 'I'--/* unsigned int */--local OP_LONG = 'l'--/* long */--local OP_ULONG= 'L'--/* unsigned long */--local OP_LITTLEENDIAN= '<'--/* little endian */--local OP_BIGENDIAN= '>'--/* big endian */--local OP_NATIVE= '='--/* native endian */----@packedStr --已经打包的字节字符串如果是创建写bytearray 此参数不需要传nil--@endian --字节序不传默认小字节序--]]function ByteArray:new(packedStr, endian) local t = {} setmetatable(t, self) self.packedStr =packedStr self.endian = endian or '<' self.fmt = {} self.data = {} self.position = 1 self.__index = self return tend--清除数据--]]function ByteArray:destroy() self.packedStr = nil self.fmt = nil self.data = nilendfunction ByteArray:readByte() local val = 0 self.position, val = ipack.unpack(self.packedStr, typeEnum.OP_BYTE, self.position) return valendfunction ByteArray:writeByte(b) self.fmt[#self.fmt + 1] = typeEnum.OP_BYTE self.data[#self.data + 1] = bendfunction ByteArray:readUByte() local val = 0 self.position, val = ipack.unpack(self.packedStr, typeEnum.OP_UBYTE, self.position) return valendfunction ByteArray:writeUByte(b) self.fmt[#self.fmt + 1] = typeEnum.OP_UBYTE self.data[#self.data + 1] = bendfunction ByteArray:readShort() local val = 0 self.position, val = ipack.unpack(self.packedStr, self.endian .. typeEnum.OP_SHORT, self.position) return valendfunction ByteArray:readUshort() local val = 0 self.position, val = ipack.unpack(self.packedStr, self.endian .. typeEnum.OP_USHORT, self.position) return valendfunction ByteArray:writeUShort(h) self.fmt[#self.fmt + 1] = typeEnum.OP_USHORT self.data[#self.data + 1] = hendfunction ByteArray:writeShort(h) self.fmt[#self.fmt + 1] = typeEnum.OP_SHORT self.data[#self.data + 1] = hendfunction ByteArray:readInt() local val = 0 self.position, val = ipack.unpack(self.packedStr, self.endian .. typeEnum.OP_INT, self.position) return valendfunction ByteArray:writeInt(i) self.fmt[#self.fmt + 1] = typeEnum.OP_INT self.data[#self.data + 1] = iendfunction ByteArray:readDouble() local val = 0 self.position, val = ipack.unpack(self.packedStr, self.endian .. typeEnum.OP_DOUBLE, self.position) return valendfunction ByteArray:readUint() local val = 0 self.position, val = ipack.unpack(self.packedStr, self.endian .. typeEnum.OP_UINT, self.position) return valendfunction ByteArray:writeDouble(d) self.fmt[#self.fmt + 1] = typeEnum.OP_DOUBLE self.data[#self.data + 1] = dendfunction ByteArray:readString() local l = self:readShort() local val = 0 self.position, val = ipack.unpack(self.packedStr, typeEnum.OP_STRING .. l, self.position) return valendfunction ByteArray:writeString(s) self:writeShort(#s) self.fmt[#self.fmt + 1] = typeEnum.OP_STRING self.data[#self.data + 1] = send--获取打包后的数据 -str--]]function ByteArray:getbytesString() if self.packedStr and self.packedStr ~= '' then       return self.packedStr else       print(self.endian .. table.concat(self.fmt))       print(unpack(self.data))       return ipack.pack(self.endian .. table.concat(self.fmt), unpack(self.data)) endendreturn ByteArray 使用方法特别注意的是大小端问题‘’<‘’ 如果解析失败换下试试
如果解析数据是从C# 传过到lua的记得要给数据加上标签[LuaByteBufferAttribute]  否则传过来是个table
local ByteArray=require"ipack/ByteArray"       local ba = ByteArray:new(nil, '<')       ba:writeInt(333300)       ba:writeString('fuck 1334 goddess')       ba:writeShort(44)       ba:writeByte(-3)       ba:writeByte(122)       local s = ba:getbytesString()       print(#s, s)       print('----------------')       local ba2 = ByteArray:new(s, '<')       print(ba:readInt())       print(ba:readString())       print(ba:readShort())       print(ba:readByte())       print(ba:readByte())

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tolua lua 添加 C库的byte[] 解析 byteArray ipack

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