first commit

.gitignore

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+node_modules

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2015 Mathias Buus
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# uint64be
+
+Encode / decode big endian unsigned 64 bit integers
+
+```
+npm install uint64be
+```
+
+## Usage
+
+``` js
+var uint64be = require('uint64be')
+
+var buf = uint64be.encode(42) // returns a 8 byte buffer with 42 encoded
+console.log(uint64be.decode(buf)) // returns 42
+```
+
+## API
+
+#### `buffer = uint64be.encode(num, [buffer], [offset])`
+
+Encode a number as a big endian 64 bit unsigned integer.
+Optionally you can pass a buffer + offset as the 2nd and 3rd argument
+and the number will be encoded into that buffer at the given offset.
+
+#### `num = uint64be.decode(buffer, [offset])`
+
+Decode a number from a buffer.
+
+#### `length = uint64be.encodingLength(num)`
+
+Always returns `8`. Added to comply with the standard encoding interface in node.
+Similarly `uint64be.encode.bytes` and `uint64be.decode.bytes` is also set to `8`.
+
+## License
+
+MIT

index.js

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+var UINT_32_MAX = 0xffffffff
+
+exports.encodingLength = function () {
+  return 8
+}
+
+exports.encode = function (num, buf, offset) {
+  if (!buf) buf = new Buffer(8)
+  if (!offset) offset = 0
+
+  var top = Math.floor(num / UINT_32_MAX)
+  var rem = num - top * UINT_32_MAX
+
+  buf.writeUInt32BE(top, offset)
+  buf.writeUInt32BE(rem, offset + 4)
+  return buf
+}
+
+exports.decode = function (buf, offset) {
+  if (!offset) offset = 0
+
+  if (!buf) buf = new Buffer(4)
+  if (!offset) offset = 0
+
+  var top = buf.readUInt32BE(offset)
+  var rem = buf.readUInt32BE(offset + 4)
+
+  return top * UINT_32_MAX + rem
+}
+
+exports.encode.bytes = 8
+exports.decode.bytes = 8

package.json

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+{
+  "name": "uint64be",
+  "version": "0.0.0",
+  "description": "Encode / decode big endian unsigned 64 bit integers",
+  "main": "index.js",
+  "dependencies": {},
+  "devDependencies": {
+    "standard": "^5.0.0",
+    "tape": "^4.0.2"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mafintosh/uint64be.git"
+  },
+  "scripts": {
+    "test": "standard && tape test.js"
+  },
+  "author": "Mathias Buus (@mafintosh)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mafintosh/uint64be/issues"
+  },
+  "homepage": "https://github.com/mafintosh/uint64be"
+}

test.js

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+var uint64be = require('./')
+var tape = require('tape')
+
+tape('encode', function (t) {
+  t.same(uint64be.encodingLength(42), 8)
+  t.same(uint64be.encode(42), new Buffer([0, 0, 0, 0, 0, 0, 0, 42]))
+  t.same(uint64be.encode(42424242424242), new Buffer([0x0, 0x0, 0x26, 0x95, 0xa9, 0xe6, 0x70, 0x47]))
+  t.same(uint64be.encode(Number.MAX_SAFE_INTEGER), new Buffer([0x0, 0x20, 0x0, 0x0, 0x0, 0x1f, 0xff, 0xff]))
+  t.same(uint64be.encode.bytes, 8)
+  t.end()
+})
+
+tape('decode', function (t) {
+  t.same(uint64be.decode(new Buffer([0, 0, 0, 0, 0, 0, 0, 42])), 42)
+  t.same(uint64be.decode(new Buffer([0x0, 0x0, 0x26, 0x95, 0xa9, 0xe6, 0x70, 0x47])), 42424242424242)
+  t.same(uint64be.decode(new Buffer([0x0, 0x20, 0x0, 0x0, 0x0, 0x1f, 0xff, 0xff])), Number.MAX_SAFE_INTEGER)
+  t.same(uint64be.decode.bytes, 8)
+  t.end()
+})