[英]How to work with memory like direct access files: analogues of fread and fwrite functions?
I need to work in my app with memory buffer like with direct access files.我需要在我的应用程序中使用内存缓冲区,就像直接访问文件一样。 Is exists analogues for fread and fwrite functions? fread 和 fwrite 函数是否存在类似物? C++ C++
I have buffer in memory with data.我在内存中有数据缓冲区。 I want: read data, write data and move pointer in this buffer.我想要:在这个缓冲区中读取数据、写入数据和移动指针。 Like files but with memory and without files.喜欢文件但有内存和没有文件。
I think you mean memory mapped files.我想你的意思是内存映射文件。 It is not supported by the C++ standard, but Boost has a portable implementation here . C++ 标准不支持它,但 Boost 在这里有一个可移植的实现。
Basically, it allows you to access the file through a pointer.基本上,它允许您通过指针访问文件。 The OS will take care of caching and, in general, it is quite efficient.操作系统将负责缓存,并且一般来说,它非常有效。
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