buffer-from - npm Package Compare versions

Comparing version 0.1.0 to 0.1.1

index.js

@@ -0,1 +1,47 @@
+var isArrayBuffer = require('is-array-buffer-x')
+
+var isModern = (
+  typeof Buffer.alloc === 'function' &&
+  typeof Buffer.allocUnsafe === 'function' &&
+  typeof Buffer.from === 'function'
+)
+
+function fromArrayBuffer (obj, byteOffset, length) {
+  byteOffset >>>= 0
+
+  var maxLength = obj.byteLength - byteOffset
+
+  if (maxLength < 0) {
+    throw new RangeError("'offset' is out of bounds")
+  }
+
+  if (length === undefined) {
+    length = maxLength
+  } else {
+    length >>>= 0
+
+    if (length > maxLength) {
+      throw new RangeError("'length' is out of bounds")
+    }
+  }
+
+  return isModern
+    ? Buffer.from(obj.slice(byteOffset, byteOffset + length))
+    : new Buffer(new Uint8Array(obj.slice(byteOffset, byteOffset + length)))
+}
+
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
+
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('"encoding" must be a valid string encoding')
+  }
+
+  return isModern
+    ? Buffer.from(string, encoding)
+    : new Buffer(string, encoding)
+}
+
 function bufferFrom (value, encodingOrOffset, length) {
@@ -6,5 +52,15 @@ if (typeof value === 'number') {
 
-  return new Buffer(value, encodingOrOffset, length)
+  if (isArrayBuffer(value)) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  return isModern
+    ? Buffer.from(value)
+    : new Buffer(value)
 }
 
-module.exports = (Buffer.from || bufferFrom)
+module.exports = bufferFrom

package.json

 {
   "name": "buffer-from",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "license": "MIT",
@@ -15,3 +15,6 @@ "repository": "LinusU/buffer-from",
     "buffer from"
-  ]
+  ],
+  "dependencies": {
+    "is-array-buffer-x": "^1.0.13"
+  }
 }

readme.md

 # Buffer From
 
-A ponyfill for `Buffer.from`, uses native implementation if available.
+A [ponyfill](https://ponyfill.com) for `Buffer.from`, uses native implementation if available.
 
@@ -5,0 +5,0 @@ ## Installation

No alert changes

Improved metrics

Total package byte prevSize

4251

increased by45.43%

Lines of code

58

increased by286.67%

Worsened metrics

Dependency count

1

increased byInfinity%

Dependency changes

• + Addedis-array-buffer-x@^1.0.13

• + Addedattempt-x@1.1.3(transitive)

• + Addedcached-constructors-x@1.0.2(transitive)

• + Addedhas-own-property-x@3.2.0(transitive)

• + Addedhas-symbol-support-x@1.4.2(transitive)

• + Addedhas-symbols@1.0.3(transitive)

• + Addedhas-to-string-tag-x@1.4.1(transitive)

• + Addedhas-tostringtag@1.0.2(transitive)

• + Addedinfinity-x@1.0.2(transitive)

• + Addedis-array-buffer-x@1.7.0(transitive)

• + Addedis-date-object@1.0.5(transitive)

• + Addedis-falsey-x@1.0.3(transitive)

• + Addedis-finite-x@3.0.4(transitive)

• + Addedis-function-x@3.3.0(transitive)

• + Addedis-index-x@1.1.0(transitive)

• + Addedis-nan-x@1.0.3(transitive)

• + Addedis-nil-x@1.4.2(transitive)

• + Addedis-object-like-x@1.7.1(transitive)

• + Addedis-primitive@2.0.03.0.1(transitive)

• + Addedis-string@1.0.7(transitive)

• + Addedis-symbol@1.0.4(transitive)

• + Addedlodash.isnull@3.0.0(transitive)

• + Addedmath-clamp-x@1.2.0(transitive)

• + Addedmath-sign-x@3.0.0(transitive)

• + Addedmax-safe-integer@1.0.1(transitive)

• + Addednan-x@1.0.2(transitive)

• + Addednormalize-space-x@3.0.0(transitive)

• + Addedobject-get-own-property-descriptor-x@3.2.0(transitive)

• + Addedparse-int-x@2.0.0(transitive)

• + Addedproperty-is-enumerable-x@1.1.0(transitive)

• + Addedreplace-comments-x@2.0.0(transitive)

• + Addedrequire-coercible-to-string-x@1.0.2(transitive)

• + Addedrequire-object-coercible-x@1.4.3(transitive)

• + Addedto-boolean-x@1.0.3(transitive)

• + Addedto-integer-x@3.0.0(transitive)

• + Addedto-number-x@2.0.0(transitive)

• + Addedto-object-x@1.5.0(transitive)

• + Addedto-primitive-x@1.1.0(transitive)

• + Addedto-property-key-x@2.0.2(transitive)

• + Addedto-string-symbols-supported-x@1.0.2(transitive)

• + Addedto-string-tag-x@1.4.3(transitive)

• + Addedto-string-x@1.4.5(transitive)

• + Addedtrim-left-x@3.0.0(transitive)

• + Addedtrim-right-x@3.0.0(transitive)

• + Addedtrim-x@3.0.0(transitive)

• + Addedvalidate.io-undefined@1.0.3(transitive)

• + Addedwhite-space-x@3.0.1(transitive)