Name: js-handler/node_modules/restify/node_modules/node-uuid/README.md 
1:
# node-uuid
2:
 
3:
Simple, fast generation of [RFC4122](http://www.ietf.org/rfc/rfc4122.txt) UUIDS.
4:
 
5:
Features:
6:
 
7:
* Generate RFC4122 version 1 or version 4 UUIDs
8:
* Runs in node.js and all browsers.
9:
* Cryptographically strong random # generation on supporting platforms
10:
* 1.1K minified and gzip'ed  (Want something smaller?  Check this [crazy shit](https://gist.github.com/982883) out! )
11:
* [Annotated source code](http://broofa.github.com/node-uuid/docs/uuid.html)
12:
 
13:
## Getting Started
14:
 
15:
Install it in your browser:
16:
 
17:
```html
18:
<script src="uuid.js"></script>
19:
```
20:
 
21:
Or in node.js:
22:
 
23:
```
24:
npm install node-uuid
25:
```
26:
 
27:
```javascript
28:
var uuid = require('node-uuid');
29:
```
30:
 
31:
Then create some ids ...
32:
 
33:
```javascript
34:
// Generate a v1 (time-based) id
35:
uuid.v1(); // -> '6c84fb90-12c4-11e1-840d-7b25c5ee775a'
36:
 
37:
// Generate a v4 (random) id
38:
uuid.v4(); // -> '110ec58a-a0f2-4ac4-8393-c866d813b8d1'
39:
```
40:
 
41:
## API
42:
 
43:
### uuid.v1([`options` [, `buffer` [, `offset`]]])
44:
 
45:
Generate and return a RFC4122 v1 (timestamp-based) UUID.
46:
 
47:
* `options` - (Object) Optional uuid state to apply. Properties may include:
48:
 
49:
  * `node` - (Array) Node id as Array of 6 bytes (per 4.1.6). Default: Randomly generated ID.  See note 1.
50:
  * `clockseq` - (Number between 0 - 0x3fff) RFC clock sequence.  Default: An internally maintained clockseq is used.
51:
  * `msecs` - (Number | Date) Time in milliseconds since unix Epoch.  Default: The current time is used.
52:
  * `nsecs` - (Number between 0-9999) additional time, in 100-nanosecond units. Ignored if `msecs` is unspecified. Default: internal uuid counter is used, as per 4.2.1.2.
53:
 
54:
* `buffer` - (Array | Buffer) Array or buffer where UUID bytes are to be written.
55:
* `offset` - (Number) Starting index in `buffer` at which to begin writing.
56:
 
57:
Returns `buffer`, if specified, otherwise the string form of the UUID
58:
 
59:
Notes:
60:
 
61:
1. The randomly generated node id is only guaranteed to stay constant for the lifetime of the current JS runtime. (Future versions of this module may use persistent storage mechanisms to extend this guarantee.)
62:
 
63:
Example: Generate string UUID with fully-specified options
64:
 
65:
```javascript
66:
uuid.v1({
67:
  node: [0x01, 0x23, 0x45, 0x67, 0x89, 0xab],
68:
  clockseq: 0x1234,
69:
  msecs: new Date('2011-11-01').getTime(),
70:
  nsecs: 5678
71:
});   // -> "710b962e-041c-11e1-9234-0123456789ab"
72:
```
73:
 
74:
Example: In-place generation of two binary IDs
75:
 
76:
```javascript
77:
// Generate two ids in an array
78:
var arr = new Array(32); // -> []
79:
uuid.v1(null, arr, 0);   // -> [02 a2 ce 90 14 32 11 e1 85 58 0b 48 8e 4f c1 15]
80:
uuid.v1(null, arr, 16);  // -> [02 a2 ce 90 14 32 11 e1 85 58 0b 48 8e 4f c1 15 02 a3 1c b0 14 32 11 e1 85 58 0b 48 8e 4f c1 15]
81:
 
82:
// Optionally use uuid.unparse() to get stringify the ids
83:
uuid.unparse(buffer);    // -> '02a2ce90-1432-11e1-8558-0b488e4fc115'
84:
uuid.unparse(buffer, 16) // -> '02a31cb0-1432-11e1-8558-0b488e4fc115'
85:
```
86:
 
87:
### uuid.v4([`options` [, `buffer` [, `offset`]]])
88:
 
89:
Generate and return a RFC4122 v4 UUID.
90:
 
91:
* `options` - (Object) Optional uuid state to apply. Properties may include:
92:
 
93:
  * `random` - (Number[16]) Array of 16 numbers (0-255) to use in place of randomly generated values
94:
  * `rng` - (Function) Random # generator to use.  Set to one of the built-in generators - `uuid.mathRNG` (all platforms), `uuid.nodeRNG` (node.js only), `uuid.whatwgRNG` (WebKit only) - or a custom function that returns an array[16] of byte values.
95:
 
96:
* `buffer` - (Array | Buffer) Array or buffer where UUID bytes are to be written.
97:
* `offset` - (Number) Starting index in `buffer` at which to begin writing.
98:
 
99:
Returns `buffer`, if specified, otherwise the string form of the UUID
100:
 
101:
Example: Generate string UUID with fully-specified options
102:
 
103:
```javascript
104:
uuid.v4({
105:
  random: [
106:
    0x10, 0x91, 0x56, 0xbe, 0xc4, 0xfb, 0xc1, 0xea,
107:
    0x71, 0xb4, 0xef, 0xe1, 0x67, 0x1c, 0x58, 0x36
108:
  ]
109:
});
110:
// -> "109156be-c4fb-41ea-b1b4-efe1671c5836"
111:
```
112:
 
113:
Example: Generate two IDs in a single buffer
114:
 
115:
```javascript
116:
var buffer = new Array(32); // (or 'new Buffer' in node.js)
117:
uuid.v4(null, buffer, 0);
118:
uuid.v4(null, buffer, 16);
119:
```
120:
 
121:
### uuid.parse(id[, buffer[, offset]])
122:
### uuid.unparse(buffer[, offset])
123:
 
124:
Parse and unparse UUIDs
125:
 
126:
  * `id` - (String) UUID(-like) string
127:
  * `buffer` - (Array | Buffer) Array or buffer where UUID bytes are to be written. Default: A new Array or Buffer is used
128:
  * `offset` - (Number) Starting index in `buffer` at which to begin writing. Default: 0
129:
 
130:
Example parsing and unparsing a UUID string
131:
 
132:
```javascript
133:
var bytes = uuid.parse('797ff043-11eb-11e1-80d6-510998755d10'); // -> <Buffer 79 7f f0 43 11 eb 11 e1 80 d6 51 09 98 75 5d 10>
134:
var string = uuid.unparse(bytes); // -> '797ff043-11eb-11e1-80d6-510998755d10'
135:
```
136:
 
137:
### uuid.noConflict()
138:
 
139:
(Browsers only) Set `uuid` property back to it's previous value.
140:
 
141:
Returns the node-uuid object.
142:
 
143:
Example:
144:
 
145:
```javascript
146:
var myUuid = uuid.noConflict();
147:
myUuid.v1(); // -> '6c84fb90-12c4-11e1-840d-7b25c5ee775a'
148:
```
149:
 
150:
## Deprecated APIs
151:
 
152:
Support for the following v1.2 APIs is available in v1.3, but is deprecated and will be removed in the next major version.
153:
 
154:
### uuid([format [, buffer [, offset]]])
155:
 
156:
uuid() has become uuid.v4(), and the `format` argument is now implicit in the `buffer` argument. (i.e. if you specify a buffer, the format is assumed to be binary).
157:
 
158:
### uuid.BufferClass
159:
 
160:
The class of container created when generating binary uuid data if no buffer argument is specified.  This is expected to go away, with no replacement API.
161:
 
162:
## Testing
163:
 
164:
In node.js
165:
 
166:
```
167:
> cd test
168:
> node test.js
169:
```
170:
 
171:
In Browser
172:
 
173:
```
174:
open test/test.html
175:
```
176:
 
177:
### Benchmarking
178:
 
179:
Requires node.js
180:
 
181:
```
182:
npm install uuid uuid-js
183:
node benchmark/benchmark.js
184:
```
185:
 
186:
For a more complete discussion of node-uuid performance, please see the `benchmark/README.md` file, and the [benchmark wiki](https://github.com/broofa/node-uuid/wiki/Benchmark)
187:
 
188:
For browser performance [checkout the JSPerf tests](http://jsperf.com/node-uuid-performance).
189:
 
190:
## Release notes
191:
 
192:
v1.4
193:
* Improved module context detection
194:
* Removed public RNG functions
195:
 
196:
v1.3.2:
197:
* Improve tests and handling of v1() options (Issue #24)
198:
* Expose RNG option to allow for perf testing with different generators
199:
 
200:
v1.3:
201:
* Support for version 1 ids, thanks to [@ctavan](https://github.com/ctavan)!
202:
* Support for node.js crypto API
203:
* De-emphasizing performance in favor of a) cryptographic quality PRNGs where available and b) more manageable code