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I'm trying to learn a bit more about how I/O streams work in C++, and I'm really confused at when to use what.
What exactly is a streambuf?
When do I use a streambuf, as compared to a string, an istream, or a vector? (I already know the last three, but not how streambuf compares to them, if it does at all.)
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A stream buffer is an object in charge of performing the reading and writing operations of the stream object it is associated with: the stream delegates all such operations to its associated stream buffer object, which is an intermediary between the stream and its controlled input and output sequences.
ostream is a general purpose output stream. cout and cerr are both examples of ostreams. ifstream is an input file stream. It is a special kind of an istream that reads in data from a data file. ofstream is an output file stream.
Stream buffers, also known as riparian buffers, are vegetated areas on either side of a stream. or river. When functioning properly, buffers protect the waterbody from the impacts of human activity. Buffers can differ greatly, ranging from flat floodplains to steep gorges.
Description. filebuf s specialize streambuf s to use a file as a source or sink of characters. Characters are consumed by doing writes to the file, and are produced by doing reads. When the file is seekable, a filebuf allows seeks. At least 4 characters of putback are guaranteed.
With the help of streambuf, we can work in an even lower level. It allows access to the underlying buffers.
Here are some good examples : Copy, load, redirect and tee using C++ streambufs and in reference to comparison, This might be helpful,
See this for more details : IOstream Library
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