You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
28 lines
881 B
28 lines
881 B
4 weeks ago
|
var Buffer = require('buffer').Buffer
|
||
|
|
|
||
|
|
module.exports = function (buf) {
|
||
|
|
// If the buffer is backed by a Uint8Array, a faster version will work
|
||
|
|
if (buf instanceof Uint8Array) {
|
||
|
|
// If the buffer isn't a subarray, return the underlying ArrayBuffer
|
||
|
|
if (buf.byteOffset === 0 && buf.byteLength === buf.buffer.byteLength) {
|
||
|
|
return buf.buffer
|
||
|
|
} else if (typeof buf.buffer.slice === 'function') {
|
||
|
|
// Otherwise we need to get a proper copy
|
||
|
|
return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Buffer.isBuffer(buf)) {
|
||
|
|
// This is the slow version that will work with any Buffer
|
||
|
|
// implementation (even in old browsers)
|
||
|
|
var arrayCopy = new Uint8Array(buf.length)
|
||
|
|
var len = buf.length
|
||
|
|
for (var i = 0; i < len; i++) {
|
||
|
|
arrayCopy[i] = buf[i]
|
||
|
|
}
|
||
|
|
return arrayCopy.buffer
|
||
|
|
} else {
|
||
|
|
throw new Error('Argument must be a Buffer')
|
||
|
|
}
|
||
|
|
}
|