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/* -*- 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
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