C++ cLuaState::ToString方法代码示例

int cLuaState::CopyStackFrom(cLuaState & a_SrcLuaState, int a_SrcStart, int a_SrcEnd)
{
	/*
	// DEBUG:
	LOGD("Copying stack values from %d to %d", a_SrcStart, a_SrcEnd);
	a_SrcLuaState.LogStack("Src stack before copying:");
	LogStack("Dst stack before copying:");
	*/
	for (int i = a_SrcStart; i <= a_SrcEnd; ++i)
	{
		int t = lua_type(a_SrcLuaState, i);
		switch (t)
		{
			case LUA_TNIL:
			{
				lua_pushnil(m_LuaState);
				break;
			}
			case LUA_TSTRING:
			{
				AString s;
				a_SrcLuaState.ToString(i, s);
				Push(s);
				break;
			}
			case LUA_TBOOLEAN:
			{
				bool b = (tolua_toboolean(a_SrcLuaState, i, false) != 0);
				Push(b);
				break;
			}
			case LUA_TNUMBER:
			{
				lua_Number d = tolua_tonumber(a_SrcLuaState, i, 0);
				Push(d);
				break;
			}
			case LUA_TUSERDATA:
			{
				// Get the class name:
				const char * type = nullptr;
				if (lua_getmetatable(a_SrcLuaState, i) == 0)
				{
					LOGWARNING("%s: Unknown class in pos %d, cannot copy.", __FUNCTION__, i);
					lua_pop(m_LuaState, i - a_SrcStart);
					return -1;
				}
				lua_rawget(a_SrcLuaState, LUA_REGISTRYINDEX);  // Stack +1
				type = lua_tostring(a_SrcLuaState, -1);
				lua_pop(a_SrcLuaState, 1);                     // Stack -1

				// Copy the value:
				void * ud = tolua_touserdata(a_SrcLuaState, i, nullptr);
				tolua_pushusertype(m_LuaState, ud, type);
				break;
			}
			default:
			{
				LOGWARNING("%s: Unsupported value: '%s' at stack position %d. Can only copy numbers, strings, bools and classes!",
					__FUNCTION__, lua_typename(a_SrcLuaState, t), i
				);
				a_SrcLuaState.LogStack("Stack where copying failed:");
				lua_pop(m_LuaState, i - a_SrcStart);
				return -1;
			}
		}
	}
	return a_SrcEnd - a_SrcStart + 1;
}

bool cLuaState::CopySingleValueFrom(cLuaState & a_SrcLuaState, int a_StackIdx, int a_NumAllowedNestingLevels)
{
	int t = lua_type(a_SrcLuaState, a_StackIdx);
	switch (t)
	{
		case LUA_TNIL:
		{
			lua_pushnil(m_LuaState);
			return true;
		}
		case LUA_TSTRING:
		{
			AString s;
			a_SrcLuaState.ToString(a_StackIdx, s);
			Push(s);
			return true;
		}
		case LUA_TBOOLEAN:
		{
			bool b = (tolua_toboolean(a_SrcLuaState, a_StackIdx, false) != 0);
			Push(b);
			return true;
		}
		case LUA_TNUMBER:
		{
			lua_Number d = tolua_tonumber(a_SrcLuaState, a_StackIdx, 0);
			Push(d);
			return true;
		}
		case LUA_TUSERDATA:
		{
			// Get the class name:
			const char * type = nullptr;
			if (lua_getmetatable(a_SrcLuaState, a_StackIdx) == 0)
			{
				LOGWARNING("%s: Unknown class in pos %d, cannot copy.", __FUNCTION__, a_StackIdx);
				return false;
			}
			lua_rawget(a_SrcLuaState, LUA_REGISTRYINDEX);  // Stack +1
			type = lua_tostring(a_SrcLuaState, -1);
			lua_pop(a_SrcLuaState, 1);                     // Stack -1

			// Copy the value:
			void * ud = tolua_touserdata(a_SrcLuaState, a_StackIdx, nullptr);
			tolua_pushusertype(m_LuaState, ud, type);
			return true;
		}
		case LUA_TTABLE:
		{
			if (!CopyTableFrom(a_SrcLuaState, a_StackIdx, a_NumAllowedNestingLevels - 1))
			{
				LOGWARNING("%s: Failed to copy table in pos %d.", __FUNCTION__, a_StackIdx);
				return false;
			}
			return true;
		}
		default:
		{
			LOGWARNING("%s: Unsupported value: '%s' at stack position %d. Can only copy numbers, strings, bools, classes and simple tables!",
				__FUNCTION__, lua_typename(a_SrcLuaState, t), a_StackIdx
			);
			return false;
		}
	}
}