Description:
------------
On 32bit system, you can't generate ZIP files larger than 2GB.

I reproduce this with :
- PHP 5.3.4 on Mac OS 10.5 i686

Also observed with :
- PHP 5.2.4 on Ubuntu 8.04 i686
- PHP 5.3.2 on Ubuntu 10.04 i686

I tested with 3 files of 1GB random data. After adding the 3 files, the $zip-
>close() returns the error "Seek error: Invalid argument" and there is no zip 
output file.

After looking into ext/zip, it seems that the problem is in the use of "unsigned 
long" types instead of the "off_t" type in zip_cdir struct, and the fact that 
the HAVE_FSEEKO and HAVE_FTELLO are not detected/defined by the ./configure 
script.

On OS X (PHP 5.3.4), if I recompile the ext/zip extension by hand with the patch 
below (force HAVE_FSEEKO/HAVE_FTELLO and adjust the "unsigned long" to "off_t" 
in zip_cdir struct), then I can create my ZIP archive larger than 2GB.


Test script:
---------------
#!/bin/bash

# -- Create 3 files of 1GB random data

for I in 1 2 3; do dd if=/dev/urandom of=f$I bs=1M count=1024; done

# -- Create a 'out.zip' archive containing these 3 files

php -r '$zip = new ZipArchive(); $zip->open("out.zip", ZIPARCHIVE::CREATE); $zip->addFile("f1"); $zip->addFile("f2"); $zip->addFile("f3"); $ret = $zip->close(); if( $ret === false ) { print sprintf("Error: %s", $zip->getStatusString()); };'

zip -T out.zip
if [ $? -ne 0 ]; then
  echo "ERROR"
  exit 1
fi

echo "OK"
exit 0

Expected result:
----------------
A ZIP archive with a size around 3GB that passes the `zip -T' verification.

Actual result:
--------------
$zip->close() returns false with error "Seek error: Invalid argument", and the ZIP 
output file is not produced.