java byte 与 c byte,C ++相当于Java ByteBuffer？

I'm looking for a C++ "equivalent" of Java ByteBuffer.

I'm probably missing the obvious or just need an isolated usage example to clarify. I've looked through the iostream family & it looks like it may provide a basis. Specifically, I want to be able to:

build a buffer from a byte array/point and get primitives from the buffer, e.g. getByte, getInt

build a buffer using primitives e.g. putByte, putInt and then get the byte array/pointer.

解决方案

You have stringbuf, filebuf or you could use vector.

This is a simple example using stringbuf:

std::stringbuf buf;

char data[] = {0, 1, 2, 3, 4, 5};

char tempbuf[sizeof data];

buf.sputn(data, sizeof data); // put data

buf.sgetn(tempbuf, sizeof data); // get data

Thanks @Pete Kirkham for the idea of generic functions.

#include

template

std::stringbuf& put(std::stringbuf& buf, const Type& var)

{

buf.sputn(reinterpret_cast(&var), sizeof var);

return buf;

}

template

std::stringbuf& get(std::stringbuf& buf, Type& var)

{

buf.sgetn(reinterpret_cast(&var), sizeof(var));

return buf;

}

int main()

{

std::stringbuf mybuf;

char byte = 0;

int var;

put(mybuf, byte++);

put(mybuf, byte++);

put(mybuf, byte++);

put(mybuf, byte++);

get(mybuf, var);

}