| /* |
| * Copyright (C) 2021 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "ContentExtensionStringSerialization.h" |
| |
| #if ENABLE(CONTENT_EXTENSIONS) |
| |
| namespace WebCore::ContentExtensions { |
| |
| String deserializeString(Span<const uint8_t> span) |
| { |
| const auto* actions = span.data(); |
| const auto actionsLength = span.size(); |
| auto prefixLength = sizeof(uint32_t) + sizeof(bool); |
| auto stringStartIndex = prefixLength; |
| RELEASE_ASSERT(actionsLength >= stringStartIndex); |
| uint32_t stringLength = *reinterpret_cast<const uint32_t*>(actions); |
| bool wideCharacters = actions[sizeof(uint32_t)]; |
| |
| if (wideCharacters) { |
| RELEASE_ASSERT(actionsLength >= stringStartIndex + stringLength * sizeof(UChar)); |
| return String(reinterpret_cast<const UChar*>(&actions[stringStartIndex]), stringLength); |
| } |
| RELEASE_ASSERT(actionsLength >= stringStartIndex + stringLength * sizeof(LChar)); |
| return String(reinterpret_cast<const LChar*>(&actions[stringStartIndex]), stringLength); |
| } |
| |
| void serializeString(Vector<uint8_t>& actions, const String& string) |
| { |
| // Append Selector length (4 bytes). |
| uint32_t stringLength = string.length(); |
| actions.grow(actions.size() + sizeof(uint32_t)); |
| *reinterpret_cast<uint32_t*>(&actions[actions.size() - sizeof(uint32_t)]) = stringLength; |
| bool wideCharacters = !string.is8Bit(); |
| actions.append(wideCharacters); |
| // Append Selector. |
| if (wideCharacters) { |
| uint32_t startIndex = actions.size(); |
| actions.grow(actions.size() + sizeof(UChar) * stringLength); |
| for (uint32_t i = 0; i < stringLength; ++i) |
| *reinterpret_cast<UChar*>(&actions[startIndex + i * sizeof(UChar)]) = string[i]; |
| } else { |
| for (uint32_t i = 0; i < stringLength; ++i) |
| actions.append(string[i]); |
| } |
| } |
| |
| size_t stringSerializedLength(Span<const uint8_t> span) |
| { |
| constexpr auto prefixLength = sizeof(uint32_t) + sizeof(bool); |
| RELEASE_ASSERT(span.size() >= prefixLength); |
| auto stringLength = *reinterpret_cast<const uint32_t*>(span.data()); |
| bool wideCharacters = span[sizeof(uint32_t)]; |
| if (wideCharacters) |
| return prefixLength + stringLength * sizeof(UChar); |
| return prefixLength + stringLength * sizeof(LChar); |
| } |
| |
| } // namespace WebCore::ContentExtensions |
| |
| #endif // ENABLE(CONTENT_EXTENSIONS) |