sisong/HDiffPatch
HDiffPatch
HDiffPatch is a cross-platform library and command-line utility designed for generating and applying binary differential updates. It enables the creation of compact patch files by calculating the differences between binary files or entire directory structures, facilitating efficient data synchronization and software distribution.
The project distinguishes itself through a low-memory patching engine specifically engineered for hardware with restricted resources. By utilizing streaming buffer techniques and suffix-sorting algorithms, it maintains a constant memory footprint during operations, making it suitable for embedded system maintenance and environments where processing power is limited.
The toolset supports a wide range of synchronization capabilities, including rolling-hash-based identification of data blocks and recursive directory traversal. These features allow for the management of large file versioning and the distribution of updates by transferring only the necessary changes, thereby minimizing bandwidth usage. The software is implemented in C and C++ and provides a unified interface for cross-platform binary diffing and patching.
Features
- Binary Diffing Libraries - Provides a cross-platform C and C++ library for generating and applying compact binary deltas between files and directory structures.
- Binary Delta Generators - Generates compact binary patch files by calculating differences between binary files or directory structures.
- Embedded Patching Utilities - Provides low-memory patching routines specifically engineered for reliable software maintenance on embedded hardware.
- Parcheo binario genérico - Applies standard binary patches using formats like bsdiff and VCDIFF to update files to a target state.
- Low-Memory Patching Engines - Implements a high-performance patching system designed for embedded devices with restricted memory and processing power.
- Streaming Patch Buffers - Processes large files in small, sequential chunks to maintain a constant memory footprint during patching.
- Large File Versioning Systems - Manages large binary files by generating and applying differential patches to track changes over time.
- Compressed Delta Updates - Provides a command-line utility for creating small differential updates to minimize bandwidth usage.
- Rolling Checksum Chunking - Uses rolling checksums to identify identical data blocks across files for efficient synchronization.
- Automated Software Updates - Distributes software updates by applying binary patches to ensure efficient synchronization and reduced bandwidth usage.
- Remote File Synchronization - Synchronizes remote files by fetching only necessary changes using hash certificates to ensure integrity.
- Resource-Constrained Device Support - Provides low-memory patching routines designed for storage-limited hardware to ensure reliable updates.
- Binary Instruction Patching - Implements instruction-stream-based patching to reconstruct target data from source files and patch payloads.
- Cross-Platform Binary Modifications - Ensures data integrity and efficiency across different operating systems by applying binary patches.
- Recursive Directory Traversers - Traverses directory trees recursively to generate unified patches for nested file structures.
- Suffix-Sorting Delta Compressors - Uses suffix arrays to identify long matching sequences between binary files for highly efficient data compression.
