How Can I Effectively Use Both `std::fstream` and a `FILE*` Handle Without Redundancy?

Converting std::fstream to FILE* Handle

In certain situations, it may be necessary to leverage both C 's std::fstream and a C library that accepts a FILE handle. However, extracting a FILE handle directly from std::fstream presents challenges.

Cross-Platform Incompatibility

std::fstream does not necessarily utilize a FILE internally. Therefore, attempting to create a FILE object using information from std::fstream may result in conflicts.

Potential for Redundancy

Even if a FILE handle could be obtained, maintaining both an std::fstream and FILE object would create redundancy, as both would attempt to buffer data for the same file descriptor.

Alternative Approaches

Instead of converting std::fstream to FILE*, consider alternative solutions:

• Funopen: This BSD extension allows creating a FILE object with custom read/write functions. By implementing these functions to interact with the underlying std::fstream, a FILE interface can be created. However, this approach is not POSIX-compliant and may not be portable.

The above is the detailed content of How Can I Effectively Use Both `std::fstream` and a `FILE*` Handle Without Redundancy?. For more information, please follow other related articles on the PHP Chinese website!