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Unified Diff: chrome/resources/inspector/consarray.js

Issue 339015: Update Windows reference build to r30072.... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/reference_builds/
Patch Set: Created 11 years, 2 months ago
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Index: chrome/resources/inspector/consarray.js
===================================================================
--- chrome/resources/inspector/consarray.js (revision 0)
+++ chrome/resources/inspector/consarray.js (revision 0)
@@ -0,0 +1,93 @@
+// Copyright 2009 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
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+/**
+ * Constructs a ConsArray object. It is used mainly for tree traversal.
+ * In this use case we have lots of arrays that we need to iterate
+ * sequentally. The internal Array implementation is horribly slow
+ * when concatenating on large (10K items) arrays due to memory copying.
+ * That's why we avoid copying memory and insead build a linked list
+ * of arrays to iterate through.
+ *
+ * @constructor
+ */
+function ConsArray() {
+ this.tail_ = new ConsArray.Cell(null, null);
+ this.currCell_ = this.tail_;
+ this.currCellPos_ = 0;
+};
+
+
+/**
+ * Concatenates another array for iterating. Empty arrays are ignored.
+ * This operation can be safely performed during ongoing ConsArray
+ * iteration.
+ *
+ * @param {Array} arr Array to concatenate.
+ */
+ConsArray.prototype.concat = function(arr) {
+ if (arr.length > 0) {
+ this.tail_.data = arr;
+ this.tail_ = this.tail_.next = new ConsArray.Cell(null, null);
+ }
+};
+
+
+/**
+ * Whether the end of iteration is reached.
+ */
+ConsArray.prototype.atEnd = function() {
+ return this.currCell_ === null ||
+ this.currCell_.data === null ||
+ this.currCellPos_ >= this.currCell_.data.length;
+};
+
+
+/**
+ * Returns the current item, moves to the next one.
+ */
+ConsArray.prototype.next = function() {
+ var result = this.currCell_.data[this.currCellPos_++];
+ if (this.currCellPos_ >= this.currCell_.data.length) {
+ this.currCell_ = this.currCell_.next;
+ this.currCellPos_ = 0;
+ }
+ return result;
+};
+
+
+/**
+ * A cell object used for constructing a list in ConsArray.
+ *
+ * @constructor
+ */
+ConsArray.Cell = function(data, next) {
+ this.data = data;
+ this.next = next;
+};
+
Property changes on: chrome/resources/inspector/consarray.js
___________________________________________________________________
Added: svn:executable
+ *
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