g++ 4.6 stringstream 的错误？

发布于 2024-12-20 08:05:00 字数 657 浏览 4 评论 0原文

我过去曾在单个线程中使用 stringstream 作为管道（使用 g++ 4.5），没有任何问题。现在我尝试了相同的方法，但我无法让它在 g++ 4.6 中工作：问题是内部 streambuf 永远不会填充到第一个字节之外。

考虑这段代码，

#include <iostream>
#include <sstream>
using namespace std;

int main(){
        stringstream pipe(ios_base::in|ios_base::out|ios_base::binary);
        const char* in="lol";
        pipe.write(in, 4);
        char out[4]={0};
        cout<<pipe.readsome(out, 4)<<" "<<out<<endl;
}

它意外地打印出“1 l”。

我对 stringstream 的使用有明显的错误吗？否则，我必须得出结论，g++ 4.6 STL 存在一些缺陷。

聚苯乙烯我使用带有关联 stringbuf 的 iostream 得到了相同的结果，这基本上就是 stringstream 所做的。

原文

I have used stringstream as pipes within a single thread in the past (with g++ 4.5) with no problem. Now I tried the same approach, but I can't get it to work in g++ 4.6: the problem is that the internal streambuf is never filled beyond the first byte.

Consider this code

#include <iostream>
#include <sstream>
using namespace std;

int main(){
        stringstream pipe(ios_base::in|ios_base::out|ios_base::binary);
        const char* in="lol";
        pipe.write(in, 4);
        char out[4]={0};
        cout<<pipe.readsome(out, 4)<<" "<<out<<endl;
}

This prints unexpectedly "1 l".

Is there any evident error in my usage of stringstream? Otherwise, I must conclude that there's some flaw in g++ 4.6 STL.

P.S.
I have the same results using a iostream with an associated stringbuf, which is basically what stringstream does.

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