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Delphi&FPC Cross Platform Zip Compress&Decompress Library

Author: WiNDDRiVER(soulawing@gmail.com)

中文


This library refers to CnZip.pas in the CnVcl component library, and System.zip.pas in Delphi RTL And references some units in the component library CnCrypto Thanks to CnPack for the organization's contribution to the open source community

Features

  • Support delphi + fpc, cross-platform
  • Support aes
  • Support zip64
  • Dynamic encryption/decryption, only requires a small amount of memory to process large files, without redundant memory copying, greatly improving performance
  • Crc32 calculation while reading data, greatly improving performance

Insufficient

  • Although the speed is much faster than the built-in System.Zip and AbZip of Delphi, it is still a big gap in speed compared to mature compression and decompression software, such as WinRAR / 7Zip, etc. I hope more experts will participate in the improvement together.

Update list

2025.08.08

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