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4.\n\n[![GoDoc](https://godoc.org/github.com/gabstv/go-bsdiff?status.svg)](https://godoc.org/github.com/gabstv/go-bsdiff)\n[![Go Report Card](https://goreportcard.com/badge/github.com/gabstv/go-bsdiff)](https://goreportcard.com/report/github.com/gabstv/go-bsdiff)\n[![Build Status](https://travis-ci.org/gabstv/go-bsdiff.svg?branch=master)](https://travis-ci.org/gabstv/go-bsdiff)\n[![Coverage Status](https://coveralls.io/repos/github/gabstv/go-bsdiff/badge.svg?branch=master)](https://coveralls.io/github/gabstv/go-bsdiff?branch=master)\n\u003c!--[![codecov](https://codecov.io/gh/gabstv/go-bsdiff/branch/master/graph/badge.svg)](https://codecov.io/gh/gabstv/go-bsdiff)--\u003e\n\nbsdiff and bspatch are tools for building and applying patches to binary files. By using suffix sorting (specifically, Larsson and Sadakane's [qsufsort](http://www.larsson.dogma.net/ssrev-tr.pdf)) and taking advantage of how executable files change.\n\nThe package can be used as a library (pkg/bsdiff pkg/bspatch) or as a cli program (cmd/bsdiff cmd/bspatch).\n\n## As a library\n\n### Bsdiff Bytes\n```Go\npackage main\n\nimport (\n  \"fmt\"\n  \"bytes\"\n\n  \"github.com/gabstv/go-bsdiff/pkg/bsdiff\"\n  \"github.com/gabstv/go-bsdiff/pkg/bspatch\"\n)\n\nfunc main(){\n  // example files\n  oldfile := []byte{0xfa, 0xdd, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff}\n  newfile := []byte{0xfa, 0xdd, 0x00, 0x00, 0x00, 0xee, 0xee, 0x00, 0x00, 0xff, 0xfe, 0xfe}\n\n  // generate a BSDIFF4 patch\n  patch, err := bsdiff.Bytes(oldfile, newfile)\n  if err != nil {\n    panic(err)\n  }\n  fmt.Println(patch)\n\n  // Apply a BSDIFF4 patch\n  newfile2, err := bspatch.Bytes(oldfile, patch)\n  if err != nil {\n    panic(err)\n  }\n  if !bytes.Equal(newfile, newfile2) {\n    panic()\n  }\n}\n```\n### Bsdiff Reader\n```Go\npackage main\n\nimport (\n  \"fmt\"\n  \"bytes\"\n\n  \"github.com/gabstv/go-bsdiff/pkg/bsdiff\"\n  \"github.com/gabstv/go-bsdiff/pkg/bspatch\"\n)\n\nfunc main(){\n  oldrdr := bytes.NewReader([]byte{0xfa, 0xdd, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff})\n  newrdr := bytes.NewReader([]byte{0xfa, 0xdd, 0x00, 0x00, 0x00, 0xee, 0xee, 0x00, 0x00, 0xff, 0xfe, 0xfe})\n  patch := new(bytes.Buffer)\n\n  // generate a BSDIFF4 patch\n  if err := bsdiff.Reader(oldrdr, newrdr, patch); err != nil {\n    panic(err)\n  }\n\n  newpatchedf := new(bytes.Buffer)\n  oldrdr.Seek(0, 0)\n\n  // Apply a BSDIFF4 patch\n  if err := bspatch.Reader(oldrdr, newpatchedf, patch); err != nil {\n    panic(err)\n  }\n  fmt.Println(newpatchedf.Bytes())\n}\n```\n\n## As a program (CLI)\n```sh\ngo get -u -v github.com/gabstv/go-bsdiff/cmd/...\n\nbsdiff oldfile newfile patch\nbspatch oldfile newfile2 patch\n```","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgabstv%2Fgo-bsdiff","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fgabstv%2Fgo-bsdiff","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgabstv%2Fgo-bsdiff/lists"}