Description:
Set compression mode and level for a would-be zip file.
Syntax:
zip_compress(zip,mode,level)
Note:
This external library function (See External Library Guide) sets mode and level for compresing a file to get various compression ratio.
Parameter:
|
zip |
A zip file object. |
|
mode |
Compression mode 0: Won’t compress 1: Standard compression 2: AES_ENC mode compression Other values: Standard compression.
|
|
level |
Compression level: 1: DEFLATE_LEVEL_FASTEST 2: DEFLATE_LEVEL_FAST 3: DEFLATE_LEVEL_NORMAL 4: DEFLATE_LEVEL_MAXIMUM 5: DEFLATE_LEVEL_ULTRA Other values: DEFLATE_LEVEL_NORMAL. |
Return
value
Boolean value
Example:
|
|
A |
|
|
1 |
=zip_open("D:/emp.zip") |
Open a zip file. |
|
2 |
=zip_encrypt(A1,1,3) |
Standard encryption. |
|
3 |
>zip_close(A1) |
Open a zip file. |