I'm currently using C++ and ShadowFlare's mpq library to mess around with maps. My program currently opens the mpq, opens the chk, then writes each section to a temp file(after any editing) before finally adding it back to the mpq and compacting it.

I'm using write() with a fstream(app|out|binary) and it will output some sections correctly but others it will screw up the data (after investigation of temp file with hex editor). The documentation for fstream::write() says the output is unformatted even though it takes a char*, and I'm sending it a pointer to the buffer for each section; in the case of edited sections I send it a pointer to a structure. The temp file size is correct, though some of the data is incorrect. Scmdraft also seems to think that the resulting mpq has been protected(with and without file compression). Any hints as to what I'm doing wrong? Been messing with it on and off for a few days and I'm out of ideas.

I can attach the .cpp if needed, only ~150 lines with comments.

SCM Draft is extremely sensitive to protection, so if anything is out of the ordinary, it stops trying to read it, even though it could easily fix the problem.

Staredit also refuses to open it :\