DO NOT MERGE - Merge pi-dev@5234907 into stage-aosp-master

Bug: 120848293
Change-Id: If75c28131fdb5d963ba97b6bdf4bb84e8486b8d4
tree: 40285823a35f14791bfe177f751433b7d6f1961e
  1. .clang-format
  2. Android.bp
  3. BUILD.gn
  4. LICENSE
  5. Makefile
  6. OWNERS
  7. PRESUBMIT.cfg
  8. PREUPLOAD.cfg
  9. README.md
  10. README.version
  11. libpuffdiff.pc
  12. libpuffpatch.pc
  13. scripts/
  14. src/
README.md

Puffin

Source code for Puffin: A utility for deterministic DEFLATE recompression.

TODO(ahassani): Describe the directory structure and how-tos.

Glossary

  • Alphabet A value that occurs in the input stream. It can be either a literal:[0..255], and end of block sign [256], a length[257..285], or a distance [0..29].

  • Huffman code A variable length code representing the Huffman encoded of an alphabet. Huffman codes can be created uniquely using Huffman code length array.

  • Huffman code array An array which an array index identifies a Huffman code and the array element in that index represents the corresponding alphabet. Throughout the code, Huffman code arrays are identified by vectors with postfix hcodes_.

  • Huffman reverse code array An array which an array index identifies an alphabet and the array element in that index contains the Huffman code of the alphabet. Throughout the code, The Huffman reverse code arrays are identified by vectors with postfix rcodes_.

  • Huffman code length The number of bits in a Huffman code.

  • Huffman code length array An array of Huffman code lengths with the array index as the alphabet. Throughout the code, Huffman code length arrays are identified by vectors with postfix lens_.