chromium/third_party/blink/renderer/core/html/parser/literal_buffer.h

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#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_CORE_HTML_PARSER_LITERAL_BUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PARSER_LITERAL_BUFFER_H_

#include <algorithm>
#include <bit>
#include <memory>
#include <type_traits>

#include "base/check_op.h"
#include "base/compiler_specific.h"
#include "base/containers/span.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/partitions.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_encoding.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/wtf_size_t.h"

// For ASAN builds, disable inline buffers completely as they cause various
// issues.
#ifdef ANNOTATE_CONTIGUOUS_CONTAINER
#define BUFFER_INLINE_CAPACITY …
#else
#define BUFFER_INLINE_CAPACITY …
#endif

// LiteralBufferBase is an optimized version of Vector for LChar and UChar
// characters. In particular `AddChar` is faster than `push_back`, since
// it avoids unnecessary register spills. See https://crbug.com/1205338.
// Use one of the concrete implementations: LCharLiteralBuffer or
// UCharLiteralBuffer.
template <typename T, wtf_size_t kInlineSize>
class LiteralBufferBase { … };

template <wtf_size_t kInlineSize>
class LCharLiteralBuffer : public LiteralBufferBase<LChar, kInlineSize> { … };

template <wtf_size_t kInlineSize>
class UCharLiteralBuffer : public LiteralBufferBase<UChar, kInlineSize> { … };

#undef BUFFER_INLINE_CAPACITY

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_PARSER_LITERAL_BUFFER_H_