The memfile interface allows you to treat a fixed block of contiguous memory as a file that can be used with Allegro's I/O functions.
These functions are declared in the following header file. Link with allegro_memfile.
ALLEGRO_FILE *al_open_memfile(void *mem, int64_t size, const char *mode)
Returns a file handle to the block of memory. All read and write operations act upon the memory directly, so it must not be freed while the file remains open.
The mode can be any combination of "r" (readable) and "w" (writable). Regardless of the mode, the file always opens at position 0. The file size is fixed and cannot be expanded.
It should be closed with al_fclose. After the file is closed, you are responsible for freeing the memory (if needed).
Returns the (compiled) version of the addon, in the same format as al_get_allegro_version.