使用c ++ stl读取大于4GB的文件 [英] Reading files larger than 4GB using c++ stl

问题描述

几个星期前，我使用std :: ifstream读取一些文件，它是立即失败，打开，因为文件大于4GB。当时我无法找到一个体面的答案，为什么它被限制为32位文件大小，所以我自己使用原生操作系统API。

A few weeks back I was using std::ifstream to read in some files and it was failing immediately on open because the file was larger than 4GB. At the time I couldnt find a decent answer as to why it was limited to 32 bit files sizes, so I wrote my own using native OS API.

所以，我的问题然后：有一种方法来处理大小超过4GB的文件大小使用std :: ifstream / std :: ostream（IE：标准c ++）

So, my question then: Is there a way to handle files greater than 4GB in size using std::ifstream/std::ostream (IE: standard c++)

编辑：使用STL实现从VC 9编译器（Visual Studio 2008）。

Using the STL implementation from the VC 9 compiler (Visual Studio 2008). Surely there has to be standard way to support file sizes larger than 4GB.

推荐答案

显然，这取决于如何由库实现 off_t 。

Apparently it depends on how off_t is implemented by the library.

#include <streambuf>
__int64_t temp=std::numeric_limits<std::streamsize>::max();

可以显示当前最大值。

STLport 支持较大的文件。

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