Provided by: allegro5-doc_5.2.3.0-1_all bug


       al_fopen_slice - Allegro 5 API


              #include <allegro5/allegro.h>

              ALLEGRO_FILE *al_fopen_slice(ALLEGRO_FILE *fp, size_t initial_size, const char *mode)


       Opens  a  slice (subset) of an already open random access file as if it were a stand alone
       file.  While the slice is open, the parent file handle must not be used in any way.

       The slice is opened at the current location of the parent file,  up  through  initial_size
       bytes.   The  initial_size may be any non-negative integer that will not exceed the bounds
       of the parent file.

       Seeking  with   ALLEGRO_SEEK_SET   will   be   relative   to   this   starting   location.
       ALLEGRO_SEEK_END will be relative to the starting location plus the size of the slice.

       The mode can be any combination of:

       · r: read access

       · w: write access

       · e: expandable

       For  example,  a mode of "rw" indicates the file can be read and written.  (Note that this
       is slightly different from the stdio modes.) Keep  in  mind  that  the  parent  file  must
       support  random access and be open in normal write mode (not append) for the slice to work
       in a well defined way.

       If the slice is marked as expandable, then reads and writes can happen after  the  initial
       end  point, and the slice will grow accordingly.  Otherwise, all activity is restricted to
       the initial size of the slice.

       A slice must be closed with al_fclose(3alleg5).  The parent file will then  be  positioned
       immediately after the end of the slice.


       5.0.6, 5.1.0