/*****************************Run First Task*********************************/
static void JsContextTask(struct JsEngine* e,void* data){
struct JsAstNode* ast = NULL;
struct JsValue v;
ast = JsParseFile(JS_PARSER_DEBUG_ERROR,NULL);
if(ast == NULL)
printf("language error\n");
else
JsEval(e,ast,&v);
}
/*
相当于把string字符串放置在当前环境下执行.
*/
static void JsGlobalEval(struct JsObject *self, struct JsObject *thisobj, int argc, struct JsValue **argv, struct JsValue *res) {
int saveVarattr;
//检查参数是否正确
if(argc <=0) {
res->type =JS_UNDEFINED;
return;
} else if( argv[0]->type != JS_STRING) {
*res = *argv[0];
return;
}
//从线程中获得JsEngine
struct JsEngine* e = JsGetTlsEngine();
//处理上下文
/*Stack, Scope, This 都使用当前Context*/
saveVarattr = e->exec->varattr;
e->exec->varattr = JS_OBJECT_ATTR_DEFAULT;
//执行函数
res->type =JS_UNDEFINED;
struct JsAstNode * ast;
ast = JsParseString(e->vm->debug ? JS_PARSER_DEBUG_ERROR
: JS_PARSER_DEBUG_CLOSE,argv[0]->u.string);
if(ast == NULL)
JsThrowString("SytaxError");
JsEval(e,ast,res);
//还原环境
e->exec->varattr = saveVarattr;
//结果处理
if(res->type == JS_COMPLETION) {
if(res->u.completion.type == JS_COMPLETION_RETURN) {
*res = *res->u.completion.value;
} else if(res->u.completion.type == JS_COMPLETION_THROW) {
//不处理
} else {
//JS_COMPLETION_NORMAL, JS_COMPLETION_BREAK, JS_COMPLETION_CONTINUE
res->type = JS_UNDEFINED;
}
} else if(res->type == JS_REFERENCE) {
res->type = JS_UNDEFINED;
}//res->type = JS_OBJECT, JS_NULL, JS_BOOLEAN ...
return;
}