Writefile and readfile of Lua

Lua readfile and writefile note: the string in Lua code can contain binary data string. len (STR) is not truncated by '\ 0'. When you pass data from Lua to C: You need to input the string containing binary data and the size of the data. The size is string. when Len (STR) is used to calculate the data transfer from C to Lua: lua_pushlstring instead of lua_pushstring, lua_pushstring internally uses strlen () to calculate the data length, while lua_pushlstring needs to input a sizeint luafilesystem :: readfile (lua_state * luastate) {If (! Lua_isstring (luastate, 2) {return 0;} const char * strpath = lual_checkstring (luastate, 2); STD: wstring wstrpath; transcode: utf8_to_unicode (strpath, strlen (strpath), wstrpath); handle hfile =: createfile (wstrpath. c_str (), generic_read, 0, null, open_existing, null, null); If (hfile! = Invalid_handle_value) {DWORD nfilesize =: getfilesize (hfile, null); char * lpbuffer = new char [nfilesize]; DWORD nnumberofbytesread; bool Bret =: readfile (hfile, lpbuffer, nfilesize, & nnumberofbytesread, null); lua_pushlstring (luastate, lpbuffer, nnumberofbytesread); Delete [] lpbuffer; closehandle (hfile); return 1;} return 0;} int luafilesystem :: writefile (lua_state * luastate) {If (! Lua_isstring (luastate, 2) |! Lua_isstring (luastate, 3) {return 0;} const char * strpath = lual_checkstring (luastate, 2); const char * strcontent = lual_checkstring (luastate, 3 ); int ncontentsize = strlen (strcontent); If (lua_isnumber (luastate, 4) {ncontentsize = lual_checkint (luastate, 4);} STD: wstring wstrpath; transcode :: utf8_to_unicode (strpath, strlen (strpath), wstrpath); handle hfile =: createfile (wstrpath. c_str (), g Eneric_write, 0, null, create_always, null, null); If (hfile! = Invalid_handle_value) {DWORD nnumberofbyteswritten;: writefile (hfile, strcontent, ncontentsize, & nnumberofbyteswritten, null); closehandle (hfile);} return 0 ;}