Using std::fstream and PhysicsFS.
Eric Johnson

Hi there. I recently incorporated PhysFS in a project of mine to read the contents of archive (.zip) files. All was well until I attempted to load a text file using std::fstream. No matter what I tried, the text file could not be found.

My thinking is that al_set_physfs_file_interface() works only with Allegro-specific calls (such as al_load_bitmap() and ALLEGRO_FILE), but does not affect things outside of Allegro (such as std::fstream). Is my thinking correct?

I have attached an example that attempts to load a text file from an archive. It first uses std::fstream, and then ALLEGRO_FILE. ALLEGRO_FILE is successful, but std::fstream is not. On Linux, I am using g++ -Wall -o test main.cpp -lphysfs $(pkg-config --libs allegro-5 allegro_physfs-5) to compile from a command line.

TL;DR: Can al_set_physfs_file_interface() be used with std::fstream?

Thank you for your time. :)

Thomas Fjellstrom

It could be used if you wrote specialized fstream subclasses that work on ALLEGRO_FILE's or directly with PhysFS, but as is, no.

Eric Johnson

Thank you for your swift reply, Thomas.

Okay, no worries then. ALLEGRO_FILE makes things a bit easier anyhow. ;)

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