runtime/IndexingHeaderInlines.h

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef IndexingHeaderInlines_h
  27 #define IndexingHeaderInlines_h
  28
  29 #include "ArrayStorage.h"
  30 #include "IndexingHeader.h"
  31 #include "Structure.h"
  32
  33 namespace JSC {
  34
  35 inline size_t IndexingHeader::preCapacity(Structure* structure)
  36 {
  37     if (LIKELY(!hasAnyArrayStorage(structure->indexingType())))
  38         return 0;
  39
  40     return arrayStorage()->m_indexBias;
  41 }
  42
  43 inline size_t IndexingHeader::indexingPayloadSizeInBytes(Structure* structure)
  44 {
  45     switch (structure->indexingType()) {
  46     case ALL_UNDECIDED_INDEXING_TYPES:
  47     case ALL_INT32_INDEXING_TYPES:
  48     case ALL_DOUBLE_INDEXING_TYPES:
  49     case ALL_CONTIGUOUS_INDEXING_TYPES:
  50         return vectorLength() * sizeof(EncodedJSValue);
  51
  52     case ALL_ARRAY_STORAGE_INDEXING_TYPES:
  53         return ArrayStorage::sizeFor(arrayStorage()->vectorLength());
  54
  55     default:
  56         ASSERT(!hasIndexedProperties(structure->indexingType()));
  57         return 0;
  58     }
  59 }
  60
  61 } // namespace JSC
  62
  63 #endif // IndexingHeaderInlines_h
  64