DIUcl is the Delphi port of the popular UCL Compression Library, which is also used by the popular and well known UPX Ultimate Packer for eXecutables. DIUcl features include:

• Decompression is extremely fast and requires no memory.
• The assembler-optimized decompressor fits into less than 200 bytes of code.
• Builds into applications, requires no DLLs nor other dependencies.
• Supports in-place compression and decompression.
• Real-time decompression should be possible for any application.

The DIUcl API is very simple:

• The basic comression and decompression functions operate on blocks of memory.
• TStream wrappers for sequential on-the-fly compression and decompression with complete TStream.Seek support.
• Optimized helper functions for TStream, AnsiString, and UnicodeString operations.