/// <summary>
/// Sets a field of a lua table to a lua variable identified by luaIdentifier i.e. luaTable.someField = luaVariable
/// The table to operate on must currently be on top of the lua stack.
/// After the call the lua table is still on top of the stack.
/// </summary>
/// <param name="fieldName">name of the field</param>
/// <param name="luaIdentifier">the identifier identifying the lua variable</param>
public void SetTableFieldToLuaIdentifier(string fieldName, string luaIdentifier)
{
Lua.lua_pushstring(L, fieldName);
Lua.lua_getglobal(L, luaIdentifier);
Lua.lua_settable(L, -3);
//table is still on top of the stack
}
/// <summary>
/// Gets the value of a field of a table and returns it as type object i.e. return luaTable.someField
/// After the call the lua stack is balanced
/// </summary>
/// <param name="tableName">name of lua table</param>
/// <param name="fieldName">name of table field</param>
/// <returns>returns luaTable.someField</returns>
public object GetTableField(string tableName, string fieldName)
{
//push table on the stack
Lua.lua_getglobal(L, tableName);
if (IsTopNil)
{
throw new Exception("GetTableField, the table does not exist: " + tableName);
}
//push table field name on the stack
Lua.lua_pushstring(L, fieldName);
//get value of field of table: get tableName[fieldName]
Lua.lua_gettable(L, -2);
//get the result of the stack
int luaType = 0;
object value = GetValueOfStack(out luaType);
//pop table of the stack
Lua.lua_pop(L, 1);
//stack is balanced
return(value);
}
/// <summary>
/// Sets a field of a lua table to a lua variable identified by luaIdentifier i.e. luaTable.someField = luaVariable
/// After the call the lua stack is balanced.
/// </summary>
/// <param name="tableName">name of the lua table</param>
/// <param name="fieldName">name of the field</param>
/// <param name="luaIdentifier">the identifier identifying the lua variable</param>
public void SetTableFieldToLuaIdentifier(string tableName, string fieldName, string luaIdentifier)
{
Lua.lua_getglobal(L, tableName);
Lua.lua_pushstring(L, fieldName);
Lua.lua_getglobal(L, luaIdentifier);
Lua.lua_settable(L, -3);
Lua.lua_pop(L, 1);
//stack is balanced
}
/// <summary>
/// Pushes the value on to the lua stack based on value.GetType(), and how that type maps to a lua type.
/// Pushes nil if object is null or typeof object is not a basic type
/// </summary>
/// <param name="value">the value to push on to the stack</param>
public void PushBasicValue(object value)
{
//push value on the stack
if (value == null)
{
Lua.lua_pushnil(L);
return;
}
if (value.GetType() == typeof(string))
{
Lua.lua_pushstring(L, value.ToString());
return;
}
if (value.GetType() == typeof(bool))
{
Lua.lua_pushboolean(L, (bool)value);
return;
}
if (value.GetType() == typeof(decimal))
{
Lua.lua_pushnumber(L, Convert.ToDouble(((decimal)value)));
return;
}
if (value.GetType() == typeof(float))
{
Lua.lua_pushnumber(L, Convert.ToDouble(((float)value)));
return;
}
if (value.GetType() == typeof(double))
{
Lua.lua_pushnumber(L, Convert.ToDouble(((double)value)));
return;
}
if (value.GetType() == typeof(int))
{
Lua.lua_pushinteger(L, (int)value);
return;
}
if (value.GetType() == typeof(DateTime))
{
Lua.lua_pushstring(L, ((DateTime)value).ToString());
return;
}
if (value.GetType() == typeof(Guid))
{
Lua.lua_pushstring(L, ((Guid)value).ToString());
return;
}
if (value.GetType().IsEnum)
{
Lua.lua_pushstring(L, value.ToString());
return;
}
Lua.lua_pushnil(L);
}
/// <summary>
/// Sets a field of a lua table to a .net variable value i.e. luaTable.someField = value of .net variable.
/// After the call the lua table is still on top of the stack.
/// </summary>
/// <param name="fieldName">name of the field</param>
/// <param name="value">.net variable</param>
public void SetTableField(string fieldName, object value)
{
if (IsTopNil)
{
throw new Exception("SetTableField, no table on top of the stack");
}
//push table field name on the stack
Lua.lua_pushstring(L, fieldName);
//push value on the stack
PushBasicValue(value);
//set field of table to value: tableName[fieldName]=value
Lua.lua_settable(L, -3);
//table is still on top of the stack
}
/// <summary>
/// Gets the value of a field of a lua table and returns it as type object i.e. return luaTable.someField
/// The table to operate on must currently be on top of the lua stack.
/// After the call the lua table is still on top of the stack
/// </summary>
/// <param name="fieldName">
/// the name of the field, belonging to a lua table currently sitting on
/// top of the lua stack
/// </param>
/// <returns>returns luaTable.someField</returns>
public object GetTableField(string fieldName)
{
if (IsTopNil)
{
throw new Exception("GetTableField, no table on top of stack");
}
//push table field name on the stack
Lua.lua_pushstring(L, fieldName);
//get value of field of table: get tableName[fieldName]
Lua.lua_gettable(L, -2);
//get the result of the stack
int luaType = 0;
object value = GetValueOfStack(out luaType);
//table is still on top of the stack
return(value);
}
/// <summary>
/// Sets a field of a lua table to a .net variable value i.e. luaTable.someField = value of .net variable.
/// After the call the lua stack is balanced.
/// </summary>
/// <param name="tableName">name of the lua table</param>
/// <param name="fieldName">name of the field</param>
/// <param name="value">.net variable</param>
public void SetTableField(string tableName, string fieldName, object value)
{
//push table on the stack
Lua.lua_getglobal(L, tableName);
if (IsTopNil)
{
throw new Exception("SetTableField, the table does not exist: " + tableName);
}
//push table field name on the stack
Lua.lua_pushstring(L, fieldName);
//push value on the stack
PushBasicValue(value);
//set field of table to value: tableName[fieldName]=value
Lua.lua_settable(L, -3);
//pop table of the stack
Lua.lua_pop(L, 1);
//stack is balanced
}
