Version 2.0.1
This library is a refactoring of the minizip contribution found in the zlib distribution that is supported on Windows, macOS, and Linux. It is based on the original work of Gilles Vollant that has been contributed to by many people over the years.
Dev: 
Master: 
For the older release of the library checkout the 1.2 branch.
To generate the project files for your platform and IDE download and run cmake in the project directory.
cmake . cmake --build .
| File(s) | Description | Required |
|---|---|---|
| miniunz.c | Sample unzip application | No |
| minizip.c | Sample zip application | No |
| mz_compat.* | Minizip 1.0 compatibility layer | No |
| mz_error.h | Error codes for all the functions | Yes |
| mz_os* | OS specific helper functions | Encryption |
| mz_strm.* | Stream interface | Yes |
| mz_strm_aes.* | WinZIP AES stream | No |
| mz_strm_buf.* | Buffered stream | No |
| mz_strm_bzip.* | BZIP2 stream using libbzip2 | No |
| mz_strm_crypt.* | PKWARE traditional encryption stream | Yes |
| mz_strm_lzma.* | LZMA stream using liblzma | No |
| mz_strm_mem.* | Memory stream | Yes |
| mz_strm_split.* | Disk splitting stream | No |
| mz_strm_posix.* | File stream using Posix functions | Non-windows systems |
| mz_strm_win32.* | File stream using Win32 API functions | Windows systems |
| mz_strm_zlib.* | Deflate stream using zlib | Yes |
| mz_unzip.* | Unzip functionality | Unzipping |
| mz_zip.* | Zip functionality | Zipping |
This library has been refactored around streams.
To unzip from a zip file in memory create a memory stream and pass it to the unzip open functions.
uint8_t *zip_buffer = NULL; int32_t zip_buffer_size = 0; void *mem_stream = NULL; // fill zip_buffer with zip contents mz_stream_mem_create(&mem_stream); mz_stream_mem_set_buffer(mem_stream, zip_buffer, zip_buffer_size); mz_stream_open(mem_stream, NULL, MZ_STREAM_MODE_READ); void *unz_handle = mz_unzip_open(mem_stream); // do unzip operations mz_stream_mem_delete(&mem_stream);
To create a zip file in memory first create a growable memory stream and pass it to the zip open functions.
void *mem_stream = NULL; mz_stream_mem_create(&mem_stream); mz_stream_mem_set_grow(mem_stream, 1); mz_stream_mem_set_grow_size(mem_stream, (128 * 1024)); mz_stream_open(mem_stream, NULL, MZ_STREAM_MODE_CREATE); void *zip_handle = mz_zip_open(0, 0, mem_stream); // do unzip operations mz_stream_mem_delete(&mem_stream);
By default the library will read bytes typically one at a time. The buffered stream allows for buffered read and write operations to improve I/O performance.
void *stream = NULL; void *buf_stream = NULL; mz_stream_os_create(&stream) // do open os stream mz_stream_buffered_create(&buf_stream); mz_stream_buffered_open(buf_stream, NULL, MZ_STREAM_MODE_READ); mz_stream_buffered_set_base(buf_stream, stream); void *unz_handle = mz_unzip_open(buf_stream);
To create an archive with multiple disks use the disk splitting stream and for zipping supply a disk size value in bytes.
void *stream = NULL; void *split_stream = NULL; mz_stream_os_create(&stream); mz_stream_split_create(&split_stream); mz_stream_split_set_prop_int64(split_stream, MZ_STREAM_PROP_DISK_SIZE, 64 * 1024); mz_stream_set_base(split_stream, stream); mz_stream_open(split_stream, path.. handle = mz_unzip/zip_open(split_stream);
The central directory is the only data stored in the .zip and doesn't follow disk size restrictions.
When unzipping it will automatically determine when in needs to cross disk boundaries.
When zipping with a password it will always use AES 256-bit encryption. When unzipping it will use AES decryption only if necessary. Does not support central directory or local file header encryption since it is not supported outside of PKZIP. For a more secure method it is best to just encrypt the zip post-process.