ActionScript 3.0 整数溢出？

发布于 2024-11-06 17:55:16 字数 707 浏览 0 评论 0原文

我有一个旧的 AIR 文件，可以正常工作。我尝试重新编译它，但生成的航空文件有错误。

在深入研究代码后，我发现在某些地方字符串被解析为整数，并且生成的整数与字符串不对应。所以我制作了一个简单的 Actionscript 文件并执行了代码：

var test:int = parseInt("3710835714");

并且变量将具有值

-584131582

所以这看起来像是溢出。但令我惊讶的是，我拥有的空气文件（我自己没有编译）运行得很好。所以我想知道 - int 的内部表示是否在某种程度上取决于用于编译的 Flex 或 AIR sdk 库的版本？

//编辑：看来它可以归结为这个测试：

        var obj:Object = new Object();
        obj.val="3710835714";
        var test1:Boolean = (obj.val==-584131582);
        var test2:Boolean = (int(obj.val)==-584131582);

然而，这对我来说是评估的

test1=false;
test2=true;

- 这个旧的 AIR 文件似乎将这两种情况评估为 true。怎么可能呢？

原文

I have an old AIR file that works fine. I tried to recompile it but the resulting airfile is buggy.

After digging in the code, i found that at some place strings are parsed to ints, and that the resulting int does not correspond to the string.
So i made a simple Actionscript file and executed the code:

var test:int = parseInt("3710835714");

and the variable will have the value

-584131582

So this looks like an overflow. But i'm surprised that the air file i have (which i didn't compile myself) runs just fine. So I wonder - does the internal representation of int somehow depend on what version of the Flex or AIR sdk libraries one is using for compiling?

//edit: it seems it boils down to this test:

        var obj:Object = new Object();
        obj.val="3710835714";
        var test1:Boolean = (obj.val==-584131582);
        var test2:Boolean = (int(obj.val)==-584131582);

this evaluates for me to