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sisongsisong
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add readme & npm codes
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‎.gitignore‎

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# Compiled binary addons (https://nodejs.org/api/addons.html)
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build/Release
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build/Debug
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# Dependency directories
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node_modules/
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# TernJS port file
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.tern-port
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.idea

‎.npmignore‎

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.idea
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build

‎README.md‎

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# node-hdiffpatch
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# node-hdiffpatch
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Create patch buffer with origin buffer with [HDiffPatch](https://github.com/sisong/HDiffPatch)
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Patch compatible with HDiffPatch -SD
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## Installation
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```bash
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npm install --save node-hdiffpatch
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```
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## Usage
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### diff(originBuf, newBuf)
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Compare two buffers and return a new hdiffpatch patch as return value.

‎binding.gyp‎

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{
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"targets": [
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{
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"target_name": "hdiffpatch",
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"sources": [
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"src/main.cc",
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"src/hdiff.cpp",
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"HDiffPatch/libHDiffPatch/HPatch/patch.c",
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"HDiffPatch/file_for_patch.c",
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"HDiffPatch/libHDiffPatch/HDiff/diff.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/bytes_rle.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/suffix_string.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/compress_detect.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/limit_mem_diff/digest_matcher.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/limit_mem_diff/stream_serialize.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/libdivsufsort/divsufsort64.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/libdivsufsort/divsufsort.cpp",
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"HDiffPatch/libHDiffPatch/HDiff/private_diff/limit_mem_diff/adler_roll.cpp",
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"lzma/C/LzFind.c",
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"lzma/C/LzmaDec.c",
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"lzma/C/LzmaEnc.c",
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"lzma/C/Lzma2Dec.c",
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"lzma/C/Lzma2Enc.c"
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],
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"defines": [
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"_IS_NEED_DIR_DIFF_PATCH=0",
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"_7ZIP_ST",
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"_IS_USED_MULTITHREAD=0"
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],
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"include_dirs" : [
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"<!(node -e \"require('nan')\")"
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]
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}
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]
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}

‎index.js‎

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/**
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* Created by housisong on 2021.04.06.
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*/
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var native;
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try {
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native = require('./build/Release/hdiffpatch');
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} catch(e) {
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console.error(e);
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native = require('./build/Debug/hdiffpatch');
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}
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exports.native = native;
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exports.diff = function(oldBuf, newBuf) {
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var buffers = [];
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native.diff(oldBuf, newBuf, function(output){
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buffers.push(output);
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});
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return Buffer.concat(buffers);
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}

‎index_test.js‎

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/**
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* Created by housisong on 2021.04.06.
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*/
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var native;
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try {
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native = require('./build/Release/hdiffpatch');
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} catch(e) {
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console.error(e);
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native = require('./build/Debug/hdiffpatch');
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}
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exports.native = native;
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exports.diff = function(oldBuf, newBuf) {
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var buffers = [];
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native.diff(oldBuf, newBuf, function(output){
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buffers.push(output);
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});
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return Buffer.concat(buffers);
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}

‎package.json‎

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{
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"name": "node-hdiffpatch",
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"version": "0.1.5",
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"description": "hdiffpatch port to node.js",
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"main": "index.js",
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"scripts": {
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"test": "node test/test.js"
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},
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"gypfile": true,
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"author": "housisong",
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"license": "MIT",
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"dependencies": {
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"nan": "^2.14.0"
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},
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"devDependencies": {
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"md5": "^2.2.1"
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},
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"repository": {
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"type": "git",
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"url": "git+https://github.com/reactnativecn/node-hdiffpatch"
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},
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"keywords": [
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"hdiffpatch"
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],
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"bugs": {
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"url": "https://github.com/reactnativecn/node-hdiffpatch/issues"
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},
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"homepage": "https://github.com/reactnativecn/node-hdiffpatch#readme"
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}

‎test/test.js‎

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var hdiffpatch = require("../index");
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var test_hdiffpatch = require("../index_test");
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var crypto = require("crypto");
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var md5 = require("md5");
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var assert = require("assert").strict;
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var cur = crypto.randomBytes(40960);
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var ref = Buffer.concat([
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Buffer.from("fdsa"),
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cur.slice(0, 4096),
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Buffer.from("asdf"),
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cur.slice(4096),
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Buffer.from("asdf")
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]);
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assert.deepStrictEqual(
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md5(hdiffpatch.diff(cur, ref)),
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md5(test_hdiffpatch.diff(cur, ref))
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);
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console.log("pass");

‎yarn.lock‎

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# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
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# yarn lockfile v1
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amdefine@~1.0.0:
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version "1.0.1"
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resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
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integrity sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=
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charenc@~0.0.1:
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version "0.0.2"
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resolved "https://registry.yarnpkg.com/charenc/-/charenc-0.0.2.tgz#c0a1d2f3a7092e03774bfa83f14c0fc5790a8667"
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integrity sha1-wKHS86cJLgN3S/qD8UwPxXkKhmc=
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commander@~2.8.1:
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version "2.8.1"
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resolved "https://registry.yarnpkg.com/commander/-/commander-2.8.1.tgz#06be367febfda0c330aa1e2a072d3dc9762425d4"
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integrity sha1-Br42f+v9oMMwqh4qBy09yXYkJdQ=
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dependencies:
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graceful-readlink ">= 1.0.0"
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crypt@~0.0.1:
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version "0.0.2"
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resolved "https://registry.yarnpkg.com/crypt/-/crypt-0.0.2.tgz#88d7ff7ec0dfb86f713dc87bbb42d044d3e6c41b"
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integrity sha1-iNf/fsDfuG9xPch7u0LQRNPmxBs=
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"graceful-readlink@>= 1.0.0":
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version "1.0.1"
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resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
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integrity sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=
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is-buffer@~1.1.1:
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version "1.1.6"
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resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
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integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==
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md5@^2.2.1:
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version "2.2.1"
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resolved "https://registry.yarnpkg.com/md5/-/md5-2.2.1.tgz#53ab38d5fe3c8891ba465329ea23fac0540126f9"
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integrity sha1-U6s41f48iJG6RlMp6iP6wFQBJvk=
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dependencies:
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charenc "~0.0.1"
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crypt "~0.0.1"
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is-buffer "~1.1.1"
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nan@^2.14.0:
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version "2.14.0"
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resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
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integrity sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==

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