dom/base/nsTextFragmentImpl.h
author Andrew Halberstadt <ahalberstadt@mozilla.com>
Fri, 21 Oct 2016 12:24:17 -0400
changeset 318984 85832226cbd70af940e2f093a28ebc9ec018fb48
parent 242171 bd079aadd3feeee3f9b9f73c5e0bc4bd6a870722
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1311723 - Look for mozinfo.json in the correct place when running interactive loaners, r=armenzg MozReview-Commit-ID: K8fqlo0x4Oc

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsTextFragmentImpl_h__
#define nsTextFragmentImpl_h__

#include <stdint.h>

template<size_t size> struct Non8BitParameters;
template<> struct Non8BitParameters<4> {
  static inline size_t mask() { return 0xff00ff00; }
  static inline uint32_t alignMask() { return 0x3; }
  static inline uint32_t numUnicharsPerWord() { return 2; }
};

template<> struct Non8BitParameters<8> {
  static inline size_t mask() {
    static const uint64_t maskAsUint64 = 0xff00ff00ff00ff00ULL;
    // We have to explicitly cast this 64-bit value to a size_t, or else
    // compilers for 32-bit platforms will warn about it being too large to fit
    // in the size_t return type. (Fortunately, this code isn't actually
    // invoked on 32-bit platforms -- they'll use the <4> specialization above.
    // So it is, in fact, OK that this value is too large for a 32-bit size_t.)
    return (size_t)maskAsUint64;
  }
  static inline uint32_t alignMask() { return 0x7; }
  static inline uint32_t numUnicharsPerWord() { return 4; }
};

#endif