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Copy pathCorpseByteParser.cpp
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71 lines (62 loc) · 2.56 KB
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/*
* Copyright (C) 2026 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 "CorpseByteParser.h"
#if (OS(MACOS) || USE(APPLE_INTERNAL_SDK)) && !PLATFORM(MACCATALYST) && !PLATFORM(IOS_FAMILY_SIMULATOR)
#include <wtf/LEBDecoder.h>
#include <wtf/StdLibExtras.h>
namespace JSC {
namespace Corpse {
std::optional<uint8_t> ByteParser::consumeByte()
{
if (m_position >= m_data.size())
return std::nullopt;
return m_data[m_position++];
}
std::optional<uint64_t> ByteParser::consumeULEB128()
{
size_t start = m_position;
uint64_t result = 0;
if (WTF::LEBDecoder::decodeUInt64(m_data, m_position, result))
return result;
m_position = start;
return std::nullopt;
}
std::optional<std::string_view> ByteParser::consumeCString()
{
size_t start = m_position;
while (m_position < m_data.size() && m_data[m_position])
++m_position;
if (m_position >= m_data.size()) {
m_position = start;
return std::nullopt;
}
std::string_view result(spanReinterpretCast<const char>(m_data.subspan(start, m_position - start)));
++m_position; // Consume the null terminator.
return result;
}
} // namespace Corpse
} // namespace JSC
#endif // (OS(MACOS) || USE(APPLE_INTERNAL_SDK)) && !PLATFORM(MACCATALYST) && !PLATFORM(IOS_FAMILY_SIMULATOR)