Detailed description of LUA and Delphi applications

AboutLUAAndDelphiThe application is the content to be introduced in this article, mainly to understand and learnLuaFor more information, see this article. You can download the Lua4Delphi package from Http: // www.Lua.org.

Basic usage of Lua.

1. Open Lua:

 
 

  
  
var L: Plua_State;  
  
  
L := lua_open; 
 
 

2. After running, you must turn off:

 
 

  
  
lua_close(L); 
 
 

3. Add a method in Lua, such as adding the Print ("mrlong") method to the Lua script.

 
 

  
  
Function LuaPrint (L: Plua_State): Integer; cdecl;
  
  
Var
  
  
I, N: Integer;
  
  
Egin
  
  
// LuaShowStack ');
  
  
 
  
  
N: = lua_gettop (L );
  
  
For I: = 1 to N do
  
  
ShowMessage (lua_tostring (L, I ));
  
  
Result: = 0;
  
  
End;
 
 

4. OpenLuaThen, the registration method is: LuaRegister (L, 'print ', LuaPrint );

5. Load the Script: LuaLoadBuffer (L, memCode. Text, 'code ');

6. RunLuaScript: LuaPCall (L, 0, 0, 0 );

7. Retrieve the parameters of the registration method. For example, print ("mrlong") is used in the right Lua script.

S: = lua_tostring (L, 1); // note that this is from 1, not both 0 and Delphi and C/C ++. \
 
If (lua_gettop (L) <> 2) then // Where lua_gettop (L) is the data of the retrieved Parameter
 
LuaL_error (L, 'number of parameter errors ');

Summary: DetailsLUAAndDelphiThe application content has been introduced. I hope this article will help you!