string_hasher.h | Explore in Territory

/*
 * Copyright (C) 2005, 2006, 2008, 2010, 2013 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Patrick Gansterer <[email protected]>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_HASHER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_HASHER_H_

#ifdef __SSE2__
#include <emmintrin.h>
#elif defined(__ARM_NEON__)
#include <arm_neon.h>
#endif

#include <cstring>
#include <type_traits>

#include "base/dcheck_is_on.h"
#include "base/logging.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_uchar.h"
#include "third_party/rapidhash/rapidhash.h"

namespace WTF {

// This HashReader is for converting 16-bit strings to 8-bit strings,
// assuming that all characters are within Latin1 (i.e., the high bit
// is never set). In other words, using this gives exactly the same
// hash as if you took the 16-bit string, converted to LChar (removing
// every high byte; they must all be zero) and hashed using PlainHashReader.
// See the comment on PlainHashReader in rapidhash.h for more information.
struct ConvertTo8BitHashReader { … };

class StringHasher { … };

}  // namespace WTF

StringHasher;

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_HASHER_H_
chromium/third_party/blink/renderer/platform/wtf/text/string_hasher.h
