Merge pull request #29 from matthewleon/fromArrayBuffer

Buffer.fromArrayBuffer

Author: paf31

src/Node/Buffer.js

@@ -25,6 +25,12 @@ exports.fromStringImpl = function (str) {
   };
 };
 
+exports.fromArrayBuffer = function(ab) {
+  return function() {
+    return Buffer.from(ab);
+  };
+};
+
 exports.toArrayBuffer = function(buff) {
   return function() {
     return buff.buffer.slice(buff.byteOffset, buff.byteOffset + buff.byteLength);

src/Node/Buffer.purs

@@ -7,6 +7,7 @@ module Node.Buffer
   , create
   , fromArray
   , fromString
+  , fromArrayBuffer
   , toArrayBuffer
   , read
   , readString
@@ -87,6 +88,11 @@ foreign import create :: forall e. Int -> Eff (buffer :: BUFFER | e) Buffer
 -- | Creates a new buffer from an array of octets, sized to match the array.
 foreign import fromArray :: forall e. Array Octet -> Eff (buffer :: BUFFER | e) Buffer
 
+-- | Creates a buffer view from a JS ArrayByffer without copying data.
+--
+-- Requires Node >= v5.10.0
+foreign import fromArrayBuffer :: forall e. ArrayBuffer -> Eff (buffer :: BUFFER | e) Buffer
+
 -- | Creates a new buffer from a string with the specified encoding, sized to
 -- | match the string.
 fromString :: forall e. String -> Encoding -> Eff (buffer :: BUFFER | e) Buffer