Inline internal getters for typed arrays & friends.

src/typedarray.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 39 matching lines @@
 macro TYPED_ARRAY_CONSTRUCTOR(ARRAY_ID, NAME, ELEMENT_SIZE)
   function NAMEConstructByArrayBuffer(obj, buffer, byteOffset, length) {
     if (!IS_UNDEFINED(byteOffset)) {
         byteOffset =
             ToPositiveInteger(byteOffset,  "invalid_typed_array_length");
     }
     if (!IS_UNDEFINED(length)) {
         length = ToPositiveInteger(length, "invalid_typed_array_length");
     }
 
-    var bufferByteLength = %ArrayBufferGetByteLength(buffer);
+    var bufferByteLength = %_ArrayBufferGetByteLength(buffer);
     var offset;
     if (IS_UNDEFINED(byteOffset)) {
       offset = 0;
     } else {
       offset = byteOffset;
 
       if (offset % ELEMENT_SIZE !== 0) {
         throw MakeRangeError("invalid_typed_array_alignment",
             ["start offset", "NAME", ELEMENT_SIZE]);
       }
@@ skipping 47 matching lines @@
     if(!%TypedArrayInitializeFromArrayLike(obj, ARRAY_ID, arrayLike, l)) {
       for (var i = 0; i < l; i++) {
         // It is crucial that we let any execptions from arrayLike[i]
         // propagate outside the function.
         obj[i] = arrayLike[i];
       }
     }
   }
 
   function NAMEConstructor(arg1, arg2, arg3) {
-
     if (%_IsConstructCall()) {
       if (IS_ARRAYBUFFER(arg1)) {
         NAMEConstructByArrayBuffer(this, arg1, arg2, arg3);
       } else if (IS_NUMBER(arg1) || IS_STRING(arg1) ||
                  IS_BOOLEAN(arg1) || IS_UNDEFINED(arg1)) {
         NAMEConstructByLength(this, arg1);
       } else {
         NAMEConstructByArrayLike(this, arg1);
       }
     } else {
       throw MakeTypeError("constructor_not_function", ["NAME"])
     }
   }
-endmacro
 
-TYPED_ARRAYS(TYPED_ARRAY_CONSTRUCTOR)
+  function NAME_GetBuffer() {
+    if (!(%_ClassOf(this) === 'NAME')) {
+      throw MakeTypeError('incompatible_method_receiver',
+                          ["NAME.buffer", this]);
+    }
+    return %TypedArrayGetBuffer(this);
+  }
 
-function TypedArrayGetBuffer() {
-  return %TypedArrayGetBuffer(this);
-}
+  function NAME_GetByteLength() {
+    if (!(%_ClassOf(this) === 'NAME')) {
+      throw MakeTypeError('incompatible_method_receiver',
+                          ["NAME.byteLength", this]);
+    }
+    return %_ArrayBufferViewGetByteLength(this);
+  }
 
-function TypedArrayGetByteLength() {
-  return %TypedArrayGetByteLength(this);
-}
+  function NAME_GetByteOffset() {
+    if (!(%_ClassOf(this) === 'NAME')) {
+      throw MakeTypeError('incompatible_method_receiver',
+                          ["NAME.byteOffset", this]);
+    }
+    return %_ArrayBufferViewGetByteOffset(this);
+  }
 
-function TypedArrayGetByteOffset() {
-  return %TypedArrayGetByteOffset(this);
-}
+  function NAME_GetLength() {
+    if (!(%_ClassOf(this) === 'NAME')) {
+      throw MakeTypeError('incompatible_method_receiver',
+                          ["NAME.length", this]);
+    }
+    return %_TypedArrayGetLength(this);
+  }
 
-function TypedArrayGetLength() {
-  return %TypedArrayGetLength(this);
-}
+  var $NAME = global.NAME;
 
-function CreateSubArray(elementSize, constructor) {
-  return function(begin, end) {
+  function NAMESubArray(begin, end) {
+    if (!(%_ClassOf(this) === 'NAME')) {
+      throw MakeTypeError('incompatible_method_receiver',
+                          ["NAME.subarray", this]);
+    }
     var beginInt = TO_INTEGER(begin);
     if (!IS_UNDEFINED(end)) {
       end = TO_INTEGER(end);
     }
 
-    var srcLength = %TypedArrayGetLength(this);
+    var srcLength = %_TypedArrayGetLength(this);
     if (beginInt < 0) {
       beginInt = MathMax(0, srcLength + beginInt);
     } else {
       beginInt = MathMin(srcLength, beginInt);
     }
 
     var endInt = IS_UNDEFINED(end) ? srcLength : end;
     if (endInt < 0) {
       endInt = MathMax(0, srcLength + endInt);
     } else {
       endInt = MathMin(endInt, srcLength);
     }
     if (endInt < beginInt) {
       endInt = beginInt;
     }
     var newLength = endInt - beginInt;
     var beginByteOffset =
-        %TypedArrayGetByteOffset(this) + beginInt * elementSize;
-    return new constructor(%TypedArrayGetBuffer(this),
-                           beginByteOffset, newLength);
+        %_ArrayBufferViewGetByteOffset(this) + beginInt * ELEMENT_SIZE;
+    return new $NAME(%TypedArrayGetBuffer(this),
+                     beginByteOffset, newLength);
   }
-}
+endmacro
+
+TYPED_ARRAYS(TYPED_ARRAY_CONSTRUCTOR)
+
 
 function TypedArraySetFromArrayLike(target, source, sourceLength, offset) {
   if (offset > 0) {
     for (var i = 0; i < sourceLength; i++) {
       target[offset + i] = source[i];
     }
   }
   else {
     for (var i = 0; i < sourceLength; i++) {
       target[i] = source[i];
@@ skipping 87 matching lines @@
       if (intOffset + l > this.length) {
         throw MakeRangeError("typed_array_set_source_too_large");
       }
       TypedArraySetFromArrayLike(this, obj, l, intOffset);
       return;
   }
 }
 
 // -------------------------------------------------------------------
 
-function SetupTypedArray(constructor, fun, elementSize) {
+function SetupTypedArrays() {
+macro SETUP_TYPED_ARRAY(ARRAY_ID, NAME, ELEMENT_SIZE)
   %CheckIsBootstrapping();
-  %SetCode(constructor, fun);
-  %FunctionSetPrototype(constructor, new $Object());
+  %SetCode(global.NAME, NAMEConstructor);
+  %FunctionSetPrototype(global.NAME, new $Object());
 
-  %SetProperty(constructor, "BYTES_PER_ELEMENT", elementSize,
+  %SetProperty(global.NAME, "BYTES_PER_ELEMENT", ELEMENT_SIZE,
                READ_ONLY | DONT_ENUM | DONT_DELETE);
-  %SetProperty(constructor.prototype,
-               "constructor", constructor, DONT_ENUM);
-  %SetProperty(constructor.prototype,
-               "BYTES_PER_ELEMENT", elementSize,
+  %SetProperty(global.NAME.prototype,
+               "constructor", global.NAME, DONT_ENUM);
+  %SetProperty(global.NAME.prototype,
+               "BYTES_PER_ELEMENT", ELEMENT_SIZE,
                READ_ONLY | DONT_ENUM | DONT_DELETE);
-  InstallGetter(constructor.prototype, "buffer", TypedArrayGetBuffer);
-  InstallGetter(constructor.prototype, "byteOffset", TypedArrayGetByteOffset);
-  InstallGetter(constructor.prototype, "byteLength", TypedArrayGetByteLength);
-  InstallGetter(constructor.prototype, "length", TypedArrayGetLength);
+  InstallGetter(global.NAME.prototype, "buffer", NAME_GetBuffer);
+  InstallGetter(global.NAME.prototype, "byteOffset", NAME_GetByteOffset);
+  InstallGetter(global.NAME.prototype, "byteLength", NAME_GetByteLength);
+  InstallGetter(global.NAME.prototype, "length", NAME_GetLength);
 
-  InstallFunctions(constructor.prototype, DONT_ENUM, $Array(
-        "subarray", CreateSubArray(elementSize, constructor),
+  InstallFunctions(global.NAME.prototype, DONT_ENUM, $Array(
+        "subarray", NAMESubArray,
         "set", TypedArraySet
   ));
-}
-
-macro SETUP_TYPED_ARRAY(ARRAY_ID, NAME, ELEMENT_SIZE)
-  SetupTypedArray (global.NAME, NAMEConstructor, ELEMENT_SIZE);
 endmacro
 
 TYPED_ARRAYS(SETUP_TYPED_ARRAY)
+}
+
+SetupTypedArrays();
 
 // --------------------------- DataView -----------------------------
 
 var $DataView = global.DataView;
 
 function DataViewConstructor(buffer, byteOffset, byteLength) { // length = 3
   if (%_IsConstructCall()) {
     if (!IS_ARRAYBUFFER(buffer)) {
       throw MakeTypeError('data_view_not_array_buffer', []);
     }
     if (!IS_UNDEFINED(byteOffset)) {
         byteOffset = ToPositiveInteger(byteOffset, 'invalid_data_view_offset');
     }
     if (!IS_UNDEFINED(byteLength)) {
         byteLength = TO_INTEGER(byteLength);
     }
 
-    var bufferByteLength = %ArrayBufferGetByteLength(buffer);
+    var bufferByteLength = %_ArrayBufferGetByteLength(buffer);
 
     var offset = IS_UNDEFINED(byteOffset) ?  0 : byteOffset;
     if (offset > bufferByteLength) {
       throw MakeRangeError('invalid_data_view_offset');
     }
 
     var length = IS_UNDEFINED(byteLength)
         ? bufferByteLength - offset
         : byteLength;
     if (length < 0 || offset + length > bufferByteLength) {
@@ skipping 11 matching lines @@
                         ['DataView.buffer', this]);
   }
   return %DataViewGetBuffer(this);
 }
 
 function DataViewGetByteOffset() {
   if (!IS_DATAVIEW(this)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['DataView.byteOffset', this]);
   }
-  return %DataViewGetByteOffset(this);
+  return %_ArrayBufferViewGetByteOffset(this);
 }
 
 function DataViewGetByteLength() {
   if (!IS_DATAVIEW(this)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['DataView.byteLength', this]);
   }
-  return %DataViewGetByteLength(this);
+  return %_ArrayBufferViewGetByteLength(this);
 }
 
 macro DATA_VIEW_TYPES(FUNCTION)
   FUNCTION(Int8)
   FUNCTION(Uint8)
   FUNCTION(Int16)
   FUNCTION(Uint16)
   FUNCTION(Int32)
   FUNCTION(Uint32)
   FUNCTION(Float32)
@@ skipping 71 matching lines @@
 
       "getFloat32", DataViewGetFloat32,
       "setFloat32", DataViewSetFloat32,
 
       "getFloat64", DataViewGetFloat64,
       "setFloat64", DataViewSetFloat64
   ));
 }
 
 SetupDataView();