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author | Florian Dold <florian.dold@gmail.com> | 2017-05-03 15:35:00 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2017-05-03 15:35:00 +0200 |
commit | de98e0b232509d5f40c135d540a70e415272ff85 (patch) | |
tree | a79222a5b58484ab3b80d18efcaaa7ccc4769b33 /node_modules/to-arraybuffer/index.js | |
parent | e0c9d480a73fa629c1e4a47d3e721f1d2d345406 (diff) | |
download | wallet-core-de98e0b232509d5f40c135d540a70e415272ff85.tar.xz |
node_modules
Diffstat (limited to 'node_modules/to-arraybuffer/index.js')
-rw-r--r-- | node_modules/to-arraybuffer/index.js | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/node_modules/to-arraybuffer/index.js b/node_modules/to-arraybuffer/index.js new file mode 100644 index 000000000..2f69ae0c8 --- /dev/null +++ b/node_modules/to-arraybuffer/index.js @@ -0,0 +1,27 @@ +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') + } +} |