axmol/scripting/lua/cocos2dx_support/CCLuaStack.cpp

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2013-02-02 02:05:52 +08:00
/****************************************************************************
Copyright (c) 2011 cocos2d-x.org
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "CCLuaStack.h"
extern "C" {
#include "lua.h"
#include "tolua++.h"
#include "lualib.h"
#include "lauxlib.h"
#include "tolua_fix.h"
}
#include "LuaCocos2d.h"
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_MAC)
#include "platform/ios/CCLuaObjcBridge.h"
#elif (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
#include "Cocos2dxLuaLoader.h"
#endif
NS_CC_BEGIN
CCLuaStack *CCLuaStack::create(void)
{
CCLuaStack *stack = new CCLuaStack();
stack->init();
stack->autorelease();
return stack;
}
CCLuaStack *CCLuaStack::attach(lua_State *L)
{
CCLuaStack *stack = new CCLuaStack();
stack->initWithLuaState(L);
stack->autorelease();
return stack;
}
bool CCLuaStack::init(void)
{
m_state = lua_open();
luaL_openlibs(m_state);
tolua_Cocos2d_open(m_state);
toluafix_open(m_state);
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_MAC)
CCLuaObjcBridge::luaopen_luaoc(m_state);
#elif (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
addLuaLoader(loader_Android);
#endif
return true;
}
bool CCLuaStack::initWithLuaState(lua_State *L)
{
m_state = L;
return true;
}
void CCLuaStack::addSearchPath(const char* path)
{
lua_getglobal(m_state, "package"); /* L: package */
lua_getfield(m_state, -1, "path"); /* get package.path, L: package path */
const char* cur_path = lua_tostring(m_state, -1);
lua_pop(m_state, 1); /* L: package */
lua_pushfstring(m_state, "%s;%s/?.lua", cur_path, path); /* L: package newpath */
lua_setfield(m_state, -2, "path"); /* package.path = newpath, L: package */
lua_pop(m_state, 1); /* L: - */
}
void CCLuaStack::addLuaLoader(lua_CFunction func)
{
if (!func) return;
// stack content after the invoking of the function
// get loader table
lua_getglobal(m_state, "package"); /* L: package */
lua_getfield(m_state, -1, "loaders"); /* L: package, loaders */
// insert loader into index 2
lua_pushcfunction(m_state, func); /* L: package, loaders, func */
for (int i = lua_objlen(m_state, -2) + 1; i > 2; --i)
{
lua_rawgeti(m_state, -2, i - 1); /* L: package, loaders, func, function */
// we call lua_rawgeti, so the loader table now is at -3
lua_rawseti(m_state, -3, i); /* L: package, loaders, func */
}
lua_rawseti(m_state, -2, 2); /* L: package, loaders */
// set loaders into package
lua_setfield(m_state, -2, "loaders"); /* L: package */
lua_pop(m_state, 1);
}
void CCLuaStack::removeScriptObjectByCCObject(CCObject* pObj)
{
toluafix_remove_ccobject_by_refid(m_state, pObj->m_nLuaID);
}
void CCLuaStack::removeScriptHandler(int nHandler)
{
toluafix_remove_function_by_refid(m_state, nHandler);
}
int CCLuaStack::executeString(const char *codes)
{
++m_callFromLua;
int nRet = luaL_dostring(m_state, codes);
--m_callFromLua;
CC_ASSERT(m_callFromLua >= 0);
lua_gc(m_state, LUA_GCCOLLECT, 0);
if (nRet != 0)
{
CCLOG("[LUA ERROR] %s", lua_tostring(m_state, -1));
lua_pop(m_state, 1);
return nRet;
}
return 0;
}
int CCLuaStack::executeScriptFile(const char* filename)
{
++m_callFromLua;
int nRet = luaL_dofile(m_state, filename);
--m_callFromLua;
CC_ASSERT(m_callFromLua >= 0);
// lua_gc(m_state, LUA_GCCOLLECT, 0);
if (nRet != 0)
{
CCLOG("[LUA ERROR] %s", lua_tostring(m_state, -1));
lua_pop(m_state, 1);
return nRet;
}
return 0;
}
int CCLuaStack::executeGlobalFunction(const char* functionName)
{
lua_getglobal(m_state, functionName); /* query function by name, stack: function */
if (!lua_isfunction(m_state, -1))
{
CCLOG("[LUA ERROR] name '%s' does not represent a Lua function", functionName);
lua_pop(m_state, 1);
return 0;
}
++m_callFromLua;
int error = lua_pcall(m_state, 0, 1, 0); /* call function, stack: ret */
--m_callFromLua;
CC_ASSERT(m_callFromLua >= 0);
// lua_gc(m_state, LUA_GCCOLLECT, 0);
if (error)
{
CCLOG("[LUA ERROR] %s", lua_tostring(m_state, - 1));
lua_pop(m_state, 1); // clean error message
return 0;
}
// get return value
if (!lua_isnumber(m_state, -1))
{
lua_pop(m_state, 1);
return 0;
}
int ret = lua_tointeger(m_state, -1);
lua_pop(m_state, 1); /* stack: - */
return ret;
}
void CCLuaStack::clean(void)
{
lua_settop(m_state, 0);
}
void CCLuaStack::pushInt(int intValue)
{
lua_pushinteger(m_state, intValue);
}
void CCLuaStack::pushFloat(float floatValue)
{
lua_pushnumber(m_state, floatValue);
}
void CCLuaStack::pushBoolean(bool boolValue)
{
lua_pushboolean(m_state, boolValue);
}
void CCLuaStack::pushString(const char* stringValue)
{
lua_pushstring(m_state, stringValue);
}
void CCLuaStack::pushString(const char* stringValue, int length)
{
lua_pushlstring(m_state, stringValue, length);
}
void CCLuaStack::pushNil(void)
{
lua_pushnil(m_state);
}
void CCLuaStack::pushCCObject(CCObject* objectValue, const char* typeName)
{
toluafix_pushusertype_ccobject(m_state, objectValue->m_uID, &objectValue->m_nLuaID, objectValue, typeName);
}
void CCLuaStack::pushCCLuaValue(const CCLuaValue& value)
{
const CCLuaValueType type = value.getType();
if (type == CCLuaValueTypeInt)
{
return pushInt(value.intValue());
}
else if (type == CCLuaValueTypeFloat)
{
return pushFloat(value.floatValue());
}
else if (type == CCLuaValueTypeBoolean)
{
return pushBoolean(value.booleanValue());
}
else if (type == CCLuaValueTypeString)
{
return pushString(value.stringValue().c_str());
}
else if (type == CCLuaValueTypeDict)
{
pushCCLuaValueDict(value.dictValue());
}
else if (type == CCLuaValueTypeArray)
{
pushCCLuaValueArray(value.arrayValue());
}
else if (type == CCLuaValueTypeCCObject)
{
pushCCObject(value.ccobjectValue(), value.getCCObjectTypename().c_str());
}
}
void CCLuaStack::pushCCLuaValueDict(const CCLuaValueDict& dict)
{
lua_newtable(m_state); /* L: table */
for (CCLuaValueDictIterator it = dict.begin(); it != dict.end(); ++it)
{
lua_pushstring(m_state, it->first.c_str()); /* L: table key */
pushCCLuaValue(it->second); /* L: table key value */
lua_rawset(m_state, -3); /* table.key = value, L: table */
}
}
void CCLuaStack::pushCCLuaValueArray(const CCLuaValueArray& array)
{
lua_newtable(m_state); /* L: table */
int index = 1;
for (CCLuaValueArrayIterator it = array.begin(); it != array.end(); ++it)
{
pushCCLuaValue(*it); /* L: table value */
lua_rawseti(m_state, -2, index); /* table[index] = value, L: table */
++index;
}
}
bool CCLuaStack::pushFunctionByHandler(int nHandler)
{
toluafix_get_function_by_refid(m_state, nHandler); /* L: ... func */
if (!lua_isfunction(m_state, -1))
{
CCLOG("[LUA ERROR] function refid '%d' does not reference a Lua function", nHandler);
lua_pop(m_state, 1);
return false;
}
return true;
}
int CCLuaStack::executeFunction(int numArgs)
{
int functionIndex = -(numArgs + 1);
if (!lua_isfunction(m_state, functionIndex))
{
CCLOG("value at stack [%d] is not function", functionIndex);
return 0;
}
int traceback = 0;
lua_getglobal(m_state, "__G__TRACKBACK__"); /* L: ... func arg1 arg2 ... G */
if (!lua_isfunction(m_state, -1))
{
lua_pop(m_state, 1); /* L: ... func arg1 arg2 ... */
}
else
{
lua_insert(m_state, functionIndex - 1); /* L: ... G func arg1 arg2 ... */
traceback = functionIndex - 1;
}
int error = 0;
++m_callFromLua;
error = lua_pcall(m_state, numArgs, 1, traceback); /* L: ... ret */
--m_callFromLua;
if (error)
{
if (traceback == 0)
{
CCLOG("[LUA ERROR] %s", lua_tostring(m_state, - 1)); /* L: ... error */
lua_pop(m_state, 1); // remove error message from stack
}
return 0;
}
// get return value
int ret = 0;
if (lua_isnumber(m_state, -1))
{
ret = lua_tointeger(m_state, -1);
}
else if (lua_isboolean(m_state, -1))
{
ret = lua_toboolean(m_state, -1);
}
lua_pop(m_state, 1); // remove return value from stack
return ret;
}
int CCLuaStack::executeFunctionByHandler(int nHandler, int numArgs)
{
if (pushFunctionByHandler(nHandler)) /* L: ... arg1 arg2 ... func */
{
if (numArgs > 0)
{
lua_insert(m_state, -(numArgs + 1)); /* L: ... func arg1 arg2 ... */
}
return executeFunction(numArgs);
}
lua_pop(m_state, numArgs); // remove args from stack
return 0;
}
bool CCLuaStack::executeAssert(bool cond, const char *msg)
{
if (m_callFromLua == 0) return false;
lua_pushfstring(m_state, "ASSERT FAILED ON LUA EXECUTE: %s", msg ? msg : "unknown");
lua_error(m_state);
return true;
}
NS_CC_END