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Editorial: simplify DataView validation #84

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Editorial: simplify DataView validation #84

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6 changes: 2 additions & 4 deletions spec.html
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Original file line number Diff line number Diff line change
Expand Up @@ -1180,21 +1180,19 @@ <h1>DataView ( _buffer_ [ , _byteOffset_ [ , _byteLength_ ] ] )</h1>
1. Let _bufferByteLength_ be <del>_buffer_.[[ArrayBufferByteLength]]</del><ins>ArrayBufferByteLength(_buffer_, ~SeqCst~).</ins>.
1. If _offset_ &gt; _bufferByteLength_, throw a *RangeError* exception.
1. <ins>Let _bufferIsResizable_ be IsResizableArrayBuffer(_buffer_).</ins>
1. <ins>Let _byteLengthChecked_ be ~empty~.</ins>
1. <ins>If _bufferIsResizable_ is *true* and _byteLength_ is *undefined*, then</ins>
1. <ins>Let _viewByteLength_ be ~auto~.</ins>
1. <del>I</del><ins>Else i</ins>f _byteLength_ is *undefined*, then
1. Let _viewByteLength_ be _bufferByteLength_ - _offset_.
1. Else,
1. <ins>Set _byteLengthChecked_ to ? ToIndex(_byteLength_)</ins>.
1. Let _viewByteLength_ be <del>? ToIndex(_byteLength_)</del><ins>_byteLengthChecked_</ins>.
1. Let _viewByteLength_ be ? ToIndex(_byteLength_).
1. If _offset_ + _viewByteLength_ &gt; _bufferByteLength_, throw a *RangeError* exception.
1. Let _O_ be ? OrdinaryCreateFromConstructor(NewTarget, *"%DataView.prototype%"*, &laquo; [[DataView]], [[ViewedArrayBuffer]], [[ByteLength]], [[ByteOffset]] &raquo;).
1. If IsDetachedBuffer(_buffer_) is *true*, throw a *TypeError* exception.
1. <ins>Let _getBufferByteLength_ be MakeIdempotentArrayBufferByteLengthGetter(~SeqCst~).</ins>
1. <ins>Set _bufferByteLength_ be _getBufferByteLength_(_buffer_).</ins>
1. <ins>If _offset_ &gt; _bufferByteLength_, throw a *RangeError* exception.</ins>
1. <ins>If _byteLengthChecked_ is not ~empty~, then</ins>
1. <ins>If _viewByteLength_ is not ~auto~, then</ins>
1. <ins>If _offset_ + _viewByteLength_ &gt; _bufferByteLength_, throw a *RangeError* exception.</ins>
1. Set _O_.[[ViewedArrayBuffer]] to _buffer_.
1. Set _O_.[[ByteLength]] to _viewByteLength_.
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