13.2.3 Zip Built-in Functions
The ZIP BIFS utilize Info-ZIP's compression and decompression utilities via unzip32.dll, zip32.dll and unzipsfx.exe. Info-ZIP's software (Zip, UnZip and related utilities) is free and can be obtained as source code or executables from info-zip's web site. Also refer to Info-zip's web site for information on the .ZIP file format and functionality of zip and unzip.
PKWARE introduced the .ZIP file format in 1989. According to strict interpretation of the zipfile specification (as specified by PKWARE and amended by Info-ZIP), the following limits apply to all zipfile archives:
| Limit | Maximum |
|
Number of Files |
65536 |
|
Uncompressed size of a single file |
4 GB |
|
Compressed size of a single file |
4 GB |
|
Maximum size of archive that can be created |
256 TB |
|
Maximum size of archive that can be extracted |
4 GB |
Using the wildcard * in file specifications: If you want to include (or ignore) all files that are named readme or readme.* then add readme* to the list (rather than readme.*).