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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
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Diffstat (limited to 'node_modules/to-arraybuffer/index.js')
-rw-r--r--node_modules/to-arraybuffer/index.js27
1 files changed, 27 insertions, 0 deletions
diff --git a/node_modules/to-arraybuffer/index.js b/node_modules/to-arraybuffer/index.js
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+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')
+ }
+}