Move some utilities to BufferUtils.

Change-Id: Ifb3c4348cc912640b99ff53f7cac59a63480c68e

lib/util/uint8array_utils.js

@@ -109,35 +109,6 @@ shaka.util.Uint8ArrayUtils = class {
   }
 
 
-  /**
-   * Compare two Uint8Arrays for equality.
-   * For convenience, this also accepts Arrays, so that one can trivially
-   * compare a Uint8Array to an Array of numbers.
-   *
-   * @param {(Uint8Array|Array.<number>)} arr1
-   * @param {(Uint8Array|Array.<number>)} arr2
-   * @return {boolean}
-   * @export
-   */
-  static equal(arr1, arr2) {
-    if (!arr1 && !arr2) {
-      return true;
-    }
-    if (!arr1 || !arr2) {
-      return false;
-    }
-    if (arr1.length != arr2.length) {
-      return false;
-    }
-    for (const i of shaka.util.Iterables.range(arr1.length)) {
-      if (arr1[i] != arr2[i]) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-
   /**
    * Concatenate Uint8Arrays.
    * @param {...!Uint8Array} varArgs
@@ -158,60 +129,4 @@ shaka.util.Uint8ArrayUtils = class {
     }
     return result;
   }
-
-
-  /**
-   * Creates a DataView over the given buffer.
-   * @param {!BufferSource} buffer
-   * @return {!DataView}
-   */
-  static toDataView(buffer) {
-    if (buffer instanceof ArrayBuffer) {
-      return new DataView(buffer);
-    } else {
-      return new DataView(buffer.buffer, buffer.byteOffset, buffer.byteLength);
-    }
-  }
-
-
-  /**
-   * Gets the underlying ArrayBuffer of the given view.  The caller needs to
-   * ensure it uses the "byteOffset" and "byteLength" fields of the view to
-   * only use the same "view" of the data.
-   *
-   * @param {!BufferSource} view
-   * @return {!ArrayBuffer}
-   */
-  static unsafeGetArrayBuffer(view) {
-    if (view instanceof ArrayBuffer) {
-      return view;
-    } else {
-      return view.buffer;
-    }
-  }
-
-
-  /**
-   * Gets an ArrayBuffer that contains the data from the given TypedArray.  Note
-   * this will allocate a new ArrayBuffer if the object is a partial view of
-   * the data.
-   *
-   * @param {!BufferSource} view
-   * @return {!ArrayBuffer}
-   */
-  static toArrayBuffer(view) {
-    if (view instanceof ArrayBuffer) {
-      return view;
-    } else {
-      if (view.byteOffset == 0 && view.byteLength == view.buffer.byteLength) {
-        // This is a TypedArray over the whole buffer.
-        return view.buffer;
-      }
-      // This is a "view" on the buffer.  Create a new buffer that only contains
-      // the data.
-      const ret = new Uint8Array(view.byteLength);
-      ret.set(view);
-      return ret.buffer;
-    }
-  }
 };