Name
zzip_entry_data_offset, zzip_entry_fread_file_header, zzip_entry_strdup_name — helper functions for (fseeko) zip access api
Synopsis
#include <zzip/fseeko.h>
zzip_off_t
zzip_entry_data_offset( | ); | |
static zzip_off_t
zzip_entry_fread_file_header( | ); | |
zzip__new__ char*
zzip_entry_strdup_name( | ); | |
Description
The zzip_entry_data_offset functions returns the seekval offset of the data portion of the
file referenced by the given zzip_entry. It requires an intermediate
check of the file_header structure (i.e. it reads it from disk). After
this call, the contained diskfile readposition is already set to the
data_offset returned here. On error -1 is returned.
The zzip_entry_fread_file_header functions read the correspoding struct zzip_file_header from
the zip disk of the given "entry". The returned off_t points to the
end of the file_header where the current fseek pointer has stopped.
This is used to immediatly parse out any filename/extras block following
the file_header. The return value is null on error.
The zzip_entry_strdup_name function is a big helper despite its little name: in a zip file the
encoded filenames are usually NOT zero-terminated but for common usage
with libc we need it that way. Secondly, the filename SHOULD be present
in the zip central directory but if not then we fallback to the filename
given in the file_header of each compressed data portion.
Copyright
Copyright (c) 2003,2004 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