gecko-dev/xpcom/ds/nsGkAtoms.cpp

67 строки
2.3 KiB
C++

/* -*- 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/. */
#include "nsGkAtoms.h"
namespace mozilla {
namespace detail {
// Because this is `constexpr` it ends up in read-only memory where it can be
// shared between processes.
extern constexpr GkAtoms gGkAtoms = {
// The initialization of each atom's string.
//
// Expansion of the example GK_ATOM entries in nsGkAtoms.h:
//
// u"a",
// u"bb",
// u"ccc",
//
#define GK_ATOM(name_, value_, hash_, type_, atom_type_) \
u"" value_,
#include "nsGkAtomList.h"
#undef GK_ATOM
{
// The initialization of the atoms themselves.
//
// Note that |value_| is an 8-bit string, and so |sizeof(value_)| is equal
// to the number of chars (including the terminating '\0'). The |u""| prefix
// converts |value_| to a 16-bit string.
//
// Expansion of the example GK_ATOM entries in nsGkAtoms.h:
//
// nsStaticAtom(
// 1, 0x01234567,
// offsetof(GkAtoms, mAtoms[static_cast<size_t>(GkAtoms::Atoms::a)]) -
// offsetof(GkAtoms, a_string)),
//
// nsStaticAtom(
// 2, 0x12345678,
// offsetof(GkAtoms, mAtoms[static_cast<size_t>(GkAtoms::Atoms::bb)]) -
// offsetof(GkAtoms, bb_string)),
//
// nsStaticAtom(
// 3, 0x23456789,
// offsetof(GkAtoms, mAtoms[static_cast<size_t>(GkAtoms::Atoms::ccc)]) -
// offsetof(GkAtoms, ccc_string)),
//
#define GK_ATOM(name_, value_, hash_, type_, atom_type_) \
nsStaticAtom( \
sizeof(value_) - 1, hash_, \
offsetof(GkAtoms, \
mAtoms[static_cast<size_t>(GkAtoms::Atoms::name_)]) - \
offsetof(GkAtoms, name_##_string)),
#include "nsGkAtomList.h"
#undef GK_ATOM
}
};
} // namespace detail
} // namespace mozilla
const nsStaticAtom* const nsGkAtoms::sAtoms = mozilla::detail::gGkAtoms.mAtoms;