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/*
* Copyright (C) 2011 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 "ArgumentCoders.h"
#include "DaemonDecoder.h"
#include "DaemonEncoder.h"
#include "DataReference.h"
#include "StreamConnectionEncoder.h"
#include <wtf/text/AtomString.h>
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
namespace IPC {
template<typename Encoder>
void ArgumentCoder<CString>::encode(Encoder& encoder, const CString& string)
{
// Special case the null string.
if (string.isNull()) {
encoder << std::numeric_limits<size_t>::max();
return;
}
encoder << static_cast<size_t>(string.length());
encoder.encodeSpan(string.bytes());
}
template void ArgumentCoder<CString>::encode<Encoder>(Encoder&, const CString&);
template<typename Decoder>
std::optional<CString> ArgumentCoder<CString>::decode(Decoder& decoder)
{
auto length = decoder.template decode<size_t>();
if (!length)
return std::nullopt;
if (*length == std::numeric_limits<size_t>::max()) {
// This is the null string.
return CString();
}
auto data = decoder.template decodeSpan<uint8_t>(*length);
if (!data.data())
return std::nullopt;
char* buffer;
CString string = CString::newUninitialized(*length, buffer);
static_assert(sizeof(typename decltype(data)::element_type) == 1);
memcpy(buffer, data.data(), data.size_bytes());
return string;
}
template
std::optional<CString> ArgumentCoder<CString>::decode<Decoder>(Decoder&);
template<typename Encoder>
void ArgumentCoder<String>::encode(Encoder& encoder, const String& string)
{
// Special case the null string.
if (string.isNull()) {
encoder << std::numeric_limits<unsigned>::max();
return;
}
unsigned length = string.length();
bool is8Bit = string.is8Bit();
encoder << length << is8Bit;
if (is8Bit)
encoder.encodeSpan(std::span(string.characters8(), length));
else
encoder.encodeSpan(std::span(string.characters16(), length));
}
template
void ArgumentCoder<String>::encode<Encoder>(Encoder&, const String&);
template
void ArgumentCoder<String>::encode<StreamConnectionEncoder>(StreamConnectionEncoder&, const String&);
template<typename CharacterType, typename Decoder>
static inline std::optional<String> decodeStringText(Decoder& decoder, unsigned length)
{
auto data = decoder.template decodeSpan<CharacterType>(length);
if (!data.data())
return std::nullopt;
return std::make_optional<String>(data);
}
template<typename Decoder>
WARN_UNUSED_RETURN std::optional<String> ArgumentCoder<String>::decode(Decoder& decoder)
{
auto length = decoder.template decode<unsigned>();
if (!length)
return std::nullopt;
if (*length == std::numeric_limits<unsigned>::max()) {
// This is the null string.
return String();
}
auto is8Bit = decoder.template decode<bool>();
if (!is8Bit)
return std::nullopt;
if (*is8Bit)
return decodeStringText<LChar>(decoder, *length);
return decodeStringText<UChar>(decoder, *length);
}
template
std::optional<String> ArgumentCoder<String>::decode<Decoder>(Decoder&);
template<typename Encoder>
void ArgumentCoder<StringView>::encode(Encoder& encoder, StringView string)
{
// Special case the null string.
if (string.isNull()) {
encoder << std::numeric_limits<uint32_t>::max();
return;
}
unsigned length = string.length();
bool is8Bit = string.is8Bit();
encoder << length << is8Bit;
if (is8Bit)
encoder.encodeSpan(string.span8());
else
encoder.encodeSpan(string.span16());
}
template
void ArgumentCoder<StringView>::encode<Encoder>(Encoder&, StringView);
template
void ArgumentCoder<StringView>::encode<StreamConnectionEncoder>(StreamConnectionEncoder&, StringView);
#if HAVE(AUDIT_TOKEN)
void ArgumentCoder<audit_token_t>::encode(Encoder& encoder, const audit_token_t& auditToken)
{
for (unsigned i = 0; i < std::size(auditToken.val); i++)
encoder << auditToken.val[i];
}
WARN_UNUSED_RETURN bool ArgumentCoder<audit_token_t>::decode(Decoder& decoder, audit_token_t& auditToken)
{
for (unsigned i = 0; i < std::size(auditToken.val); i++) {
if (!decoder.decode(auditToken.val[i]))
return false;
}
return true;
}
#endif // HAVE(AUDIT_TOKEN)
} // namespace IPC
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