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NAME

       zzip_disk_fopen, zzip_disk_entry_fopen, zzip_disk_fread,
       zzip_disk_fclose, zzip_disk_feof - openening a file part wrapped within
       a (mmapped) zip archive

SYNOPSIS

       #include <zzip/mmapped.h>

       zzip__new__ ZZIP_DISK_FILE *
                                                    zzip_disk_fopen((ZZIP_DISK * disk, char *filename));

       zzip__new__ ZZIP_DISK_FILE *
                                                          zzip_disk_entry_fopen((ZZIP_DISK * disk, ZZIP_DISK_ENTRY * entry));

       zzip_size_t
                                   zzip_disk_fread((void *ptr, zzip_size_t sized, zzip_size_t nmemb, ZZIP_DISK_FILE * file));

       int zzip_disk_fclose((ZZIP_DISK_FILE * file));

       int zzip_disk_feof((ZZIP_DISK_FILE * file));

DESCRIPTION

       The zzip_disk_fopen function opens a file found by name, so it does a
       search into the zip central directory with zzip_disk_findfile and
       whatever is found first is given to zzip_disk_entry_fopen

       the ZZIP_DISK_FILE* is rather simple in just encapsulating the
       arguments given to the zzip_disk_entry_fopen function plus a zlib
       deflate buffer. Note that the ZZIP_DISK pointer does already contain
       the full mmapped file area of a zip disk, so open()ing a file part
       within that area happens to be a lookup of its bounds and encoding.
       That information is memorized on the ZZIP_DISK_FILE so that subsequent
       _read() operations will be able to get the next data portion or return
       an eof condition for that file part wrapped in the zip archive.

       The zzip_disk_fread function reads more bytes into the output buffer
       specified as arguments. The return value is null on eof or error, the
       stdio-like interface can not distinguish between these so you need to
       check with zzip_disk_feof for the difference.

       The zzip_disk_fclose function releases any zlib decoder info needed for
       decompression and dumps the ZZIP_DISK_FILE* then.

       The zzip_disk_feof function allows to distinguish an error from an eof
       condition. Actually, if we found an error but we did already reach eof
       then we just keep on saying that it was an eof, so the app can just
       continue.

AUTHOR

       ·   Guido Draheim <guidod@gmx.de>

COPYRIGHT

       Copyright (c) 2003,2004,2006 Guido Draheim All rights reserved, use
       under the restrictions of the Lesser GNU General Public License or
       alternatively the restrictions of the Mozilla Public License 1.1



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