#pragma once
#include "Decoder.h"
#include "Encoder.h"
#include <utility>
#include <wtf/Forward.h>
#include <wtf/MonotonicTime.h>
#include <wtf/SHA1.h>
#include <wtf/WallTime.h>
namespace IPC {
template<typename T> struct SimpleArgumentCoder {
static void encode(Encoder& encoder, const T& t)
{
encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(&t), sizeof(T), alignof(T));
}
static bool decode(Decoder& decoder, T& t)
{
return decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(&t), sizeof(T), alignof(T));
}
};
template<typename T> struct ArgumentCoder<OptionSet<T>> {
static void encode(Encoder& encoder, const OptionSet<T>& optionSet)
{
encoder << (static_cast<uint64_t>(optionSet.toRaw()));
}
static bool decode(Decoder& decoder, OptionSet<T>& optionSet)
{
uint64_t value;
if (!decoder.decode(value))
return false;
optionSet = OptionSet<T>::fromRaw(value);
return true;
}
static Optional<OptionSet<T>> decode(Decoder& decoder)
{
Optional<uint64_t> value;
decoder >> value;
if (!value)
return WTF::nullopt;
return OptionSet<T>::fromRaw(*value);
}
};
template<typename T> struct ArgumentCoder<Optional<T>> {
static void encode(Encoder& encoder, const Optional<T>& optional)
{
if (!optional) {
encoder << false;
return;
}
encoder << true;
encoder << optional.value();
}
static bool decode(Decoder& decoder, Optional<T>& optional)
{
bool isEngaged;
if (!decoder.decode(isEngaged))
return false;
if (!isEngaged) {
optional = WTF::nullopt;
return true;
}
T value;
if (!decoder.decode(value))
return false;
optional = WTFMove(value);
return true;
}
static Optional<Optional<T>> decode(Decoder& decoder)
{
Optional<bool> isEngaged;
decoder >> isEngaged;
if (!isEngaged)
return WTF::nullopt;
if (*isEngaged) {
Optional<T> value;
decoder >> value;
if (!value)
return WTF::nullopt;
return Optional<Optional<T>>(WTFMove(*value));
}
return Optional<Optional<T>>(Optional<T>(WTF::nullopt));
}
};
template<typename T, typename U> struct ArgumentCoder<std::pair<T, U>> {
static void encode(Encoder& encoder, const std::pair<T, U>& pair)
{
encoder << pair.first << pair.second;
}
static bool decode(Decoder& decoder, std::pair<T, U>& pair)
{
T first;
if (!decoder.decode(first))
return false;
U second;
if (!decoder.decode(second))
return false;
pair.first = first;
pair.second = second;
return true;
}
static Optional<std::pair<T, U>> decode(Decoder& decoder)
{
Optional<T> first;
decoder >> first;
if (!first)
return WTF::nullopt;
Optional<U> second;
decoder >> second;
if (!second)
return WTF::nullopt;
return {{ WTFMove(*first), WTFMove(*second) }};
}
};
template<size_t index, typename... Elements>
struct TupleCoder {
static void encode(Encoder& encoder, const std::tuple<Elements...>& tuple)
{
encoder << std::get<sizeof...(Elements) - index>(tuple);
TupleCoder<index - 1, Elements...>::encode(encoder, tuple);
}
template<typename U = typename std::remove_reference<typename std::tuple_element<sizeof...(Elements) - index, std::tuple<Elements...>>::type>::type, std::enable_if_t<!UsesModernDecoder<U>::value>* = nullptr>
static bool decode(Decoder& decoder, std::tuple<Elements...>& tuple)
{
if (!decoder.decode(std::get<sizeof...(Elements) - index>(tuple)))
return false;
return TupleCoder<index - 1, Elements...>::decode(decoder, tuple);
}
template<typename U = typename std::remove_reference<typename std::tuple_element<sizeof...(Elements) - index, std::tuple<Elements...>>::type>::type, std::enable_if_t<UsesModernDecoder<U>::value>* = nullptr>
static bool decode(Decoder& decoder, std::tuple<Elements...>& tuple)
{
Optional<U> optional;
decoder >> optional;
if (!optional)
return false;
std::get<sizeof...(Elements) - index>(tuple) = WTFMove(*optional);
return TupleCoder<index - 1, Elements...>::decode(decoder, tuple);
}
};
template<typename... Elements>
struct TupleCoder<0, Elements...> {
static void encode(Encoder&, const std::tuple<Elements...>&)
{
}
static bool decode(Decoder&, std::tuple<Elements...>&)
{
return true;
}
};
template<typename... Elements> struct ArgumentCoder<std::tuple<Elements...>> {
static void encode(Encoder& encoder, const std::tuple<Elements...>& tuple)
{
TupleCoder<sizeof...(Elements), Elements...>::encode(encoder, tuple);
}
static bool decode(Decoder& decoder, std::tuple<Elements...>& tuple)
{
return TupleCoder<sizeof...(Elements), Elements...>::decode(decoder, tuple);
}
};
template<typename KeyType, typename ValueType> struct ArgumentCoder<WTF::KeyValuePair<KeyType, ValueType>> {
static void encode(Encoder& encoder, const WTF::KeyValuePair<KeyType, ValueType>& pair)
{
encoder << pair.key << pair.value;
}
static bool decode(Decoder& decoder, WTF::KeyValuePair<KeyType, ValueType>& pair)
{
KeyType key;
if (!decoder.decode(key))
return false;
ValueType value;
if (!decoder.decode(value))
return false;
pair.key = key;
pair.value = value;
return true;
}
};
template<bool fixedSizeElements, typename T, size_t inlineCapacity, typename OverflowHandler, size_t minCapacity> struct VectorArgumentCoder;
template<typename T, size_t inlineCapacity, typename OverflowHandler, size_t minCapacity> struct VectorArgumentCoder<false, T, inlineCapacity, OverflowHandler, minCapacity> {
static void encode(Encoder& encoder, const Vector<T, inlineCapacity, OverflowHandler, minCapacity>& vector)
{
encoder << static_cast<uint64_t>(vector.size());
for (size_t i = 0; i < vector.size(); ++i)
encoder << vector[i];
}
static bool decode(Decoder& decoder, Vector<T, inlineCapacity, OverflowHandler, minCapacity>& vector)
{
Optional<Vector<T, inlineCapacity, OverflowHandler, minCapacity>> optional;
decoder >> optional;
if (!optional)
return false;
vector = WTFMove(*optional);
return true;
}
static Optional<Vector<T, inlineCapacity, OverflowHandler, minCapacity>> decode(Decoder& decoder)
{
uint64_t size;
if (!decoder.decode(size))
return WTF::nullopt;
Vector<T, inlineCapacity, OverflowHandler, minCapacity> vector;
for (size_t i = 0; i < size; ++i) {
Optional<T> element;
decoder >> element;
if (!element)
return WTF::nullopt;
vector.append(WTFMove(*element));
}
vector.shrinkToFit();
return WTFMove(vector);
}
};
template<typename T, size_t inlineCapacity, typename OverflowHandler, size_t minCapacity> struct VectorArgumentCoder<true, T, inlineCapacity, OverflowHandler, minCapacity> {
static void encode(Encoder& encoder, const Vector<T, inlineCapacity, OverflowHandler, minCapacity>& vector)
{
encoder << static_cast<uint64_t>(vector.size());
encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(vector.data()), vector.size() * sizeof(T), alignof(T));
}
static bool decode(Decoder& decoder, Vector<T, inlineCapacity, OverflowHandler, minCapacity>& vector)
{
uint64_t size;
if (!decoder.decode(size))
return false;
if (!decoder.bufferIsLargeEnoughToContain<T>(size)) {
decoder.markInvalid();
return false;
}
Vector<T, inlineCapacity, OverflowHandler, minCapacity> temp;
temp.grow(size);
decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(temp.data()), size * sizeof(T), alignof(T));
vector.swap(temp);
return true;
}
static Optional<Vector<T, inlineCapacity, OverflowHandler, minCapacity>> decode(Decoder& decoder)
{
uint64_t size;
if (!decoder.decode(size))
return WTF::nullopt;
if (!decoder.bufferIsLargeEnoughToContain<T>(size)) {
decoder.markInvalid();
return WTF::nullopt;
}
Vector<T, inlineCapacity, OverflowHandler, minCapacity> vector;
vector.grow(size);
decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(vector.data()), size * sizeof(T), alignof(T));
return vector;
}
};
template<typename T, size_t inlineCapacity, typename OverflowHandler, size_t minCapacity> struct ArgumentCoder<Vector<T, inlineCapacity, OverflowHandler, minCapacity>> : VectorArgumentCoder<std::is_arithmetic<T>::value, T, inlineCapacity, OverflowHandler, minCapacity> { };
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg> struct ArgumentCoder<HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>> {
typedef HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg> HashMapType;
static void encode(Encoder& encoder, const HashMapType& hashMap)
{
encoder << static_cast<uint64_t>(hashMap.size());
for (typename HashMapType::const_iterator it = hashMap.begin(), end = hashMap.end(); it != end; ++it)
encoder << *it;
}
static bool decode(Decoder& decoder, HashMapType& hashMap)
{
uint64_t hashMapSize;
if (!decoder.decode(hashMapSize))
return false;
HashMapType tempHashMap;
for (uint64_t i = 0; i < hashMapSize; ++i) {
KeyArg key;
MappedArg value;
if (!decoder.decode(key))
return false;
if (!decoder.decode(value))
return false;
if (!tempHashMap.add(key, value).isNewEntry) {
decoder.markInvalid();
return false;
}
}
hashMap.swap(tempHashMap);
return true;
}
static Optional<HashMapType> decode(Decoder& decoder)
{
uint64_t hashMapSize;
if (!decoder.decode(hashMapSize))
return WTF::nullopt;
HashMapType hashMap;
for (uint64_t i = 0; i < hashMapSize; ++i) {
Optional<KeyArg> key;
decoder >> key;
if (!key)
return WTF::nullopt;
Optional<MappedArg> value;
decoder >> value;
if (!value)
return WTF::nullopt;
if (!hashMap.add(WTFMove(key.value()), WTFMove(value.value())).isNewEntry) {
decoder.markInvalid();
return WTF::nullopt;
}
}
return WTFMove(hashMap);
}
};
template<typename KeyArg, typename HashArg, typename KeyTraitsArg> struct ArgumentCoder<HashSet<KeyArg, HashArg, KeyTraitsArg>> {
typedef HashSet<KeyArg, HashArg, KeyTraitsArg> HashSetType;
static void encode(Encoder& encoder, const HashSetType& hashSet)
{
encoder << static_cast<uint64_t>(hashSet.size());
for (typename HashSetType::const_iterator it = hashSet.begin(), end = hashSet.end(); it != end; ++it)
encoder << *it;
}
static bool decode(Decoder& decoder, HashSetType& hashSet)
{
Optional<HashSetType> tempHashSet;
decoder >> tempHashSet;
if (!tempHashSet)
return false;
hashSet.swap(tempHashSet.value());
return true;
}
static Optional<HashSetType> decode(Decoder& decoder)
{
uint64_t hashSetSize;
if (!decoder.decode(hashSetSize))
return WTF::nullopt;
HashSetType hashSet;
for (uint64_t i = 0; i < hashSetSize; ++i) {
Optional<KeyArg> key;
decoder >> key;
if (!key)
return WTF::nullopt;
if (!hashSet.add(WTFMove(key.value())).isNewEntry) {
decoder.markInvalid();
return WTF::nullopt;
}
}
return WTFMove(hashSet);
}
};
template<typename KeyArg, typename HashArg, typename KeyTraitsArg> struct ArgumentCoder<HashCountedSet<KeyArg, HashArg, KeyTraitsArg>> {
typedef HashCountedSet<KeyArg, HashArg, KeyTraitsArg> HashCountedSetType;
static void encode(Encoder& encoder, const HashCountedSetType& hashCountedSet)
{
encoder << static_cast<uint64_t>(hashCountedSet.size());
for (auto entry : hashCountedSet) {
encoder << entry.key;
encoder << entry.value;
}
}
static bool decode(Decoder& decoder, HashCountedSetType& hashCountedSet)
{
uint64_t hashCountedSetSize;
if (!decoder.decode(hashCountedSetSize))
return false;
HashCountedSetType tempHashCountedSet;
for (uint64_t i = 0; i < hashCountedSetSize; ++i) {
KeyArg key;
if (!decoder.decode(key))
return false;
unsigned count;
if (!decoder.decode(count))
return false;
if (!tempHashCountedSet.add(key, count).isNewEntry) {
decoder.markInvalid();
return false;
}
}
hashCountedSet.swap(tempHashCountedSet);
return true;
}
};
template<typename ValueType, typename ErrorType> struct ArgumentCoder<Expected<ValueType, ErrorType>> {
static void encode(Encoder& encoder, const Expected<ValueType, ErrorType>& expected)
{
if (!expected.has_value()) {
encoder << false;
encoder << expected.error();
return;
}
encoder << true;
encoder << expected.value();
}
static Optional<Expected<ValueType, ErrorType>> decode(Decoder& decoder)
{
Optional<bool> hasValue;
decoder >> hasValue;
if (!hasValue)
return WTF::nullopt;
if (*hasValue) {
Optional<ValueType> value;
decoder >> value;
if (!value)
return WTF::nullopt;
Expected<ValueType, ErrorType> expected(WTFMove(*value));
return WTFMove(expected);
}
Optional<ErrorType> error;
decoder >> error;
if (!error)
return WTF::nullopt;
return { makeUnexpected(WTFMove(*error)) };
}
};
template<size_t index, typename... Types>
struct VariantCoder {
static void encode(Encoder& encoder, const WTF::Variant<Types...>& variant, unsigned i)
{
if (i == index) {
encoder << WTF::get<index>(variant);
return;
}
VariantCoder<index - 1, Types...>::encode(encoder, variant, i);
}
static Optional<WTF::Variant<Types...>> decode(Decoder& decoder, unsigned i)
{
if (i == index) {
Optional<typename WTF::variant_alternative<index, WTF::Variant<Types...>>::type> optional;
decoder >> optional;
if (!optional)
return WTF::nullopt;
return { WTFMove(*optional) };
}
return VariantCoder<index - 1, Types...>::decode(decoder, i);
}
};
template<typename... Types>
struct VariantCoder<0, Types...> {
static void encode(Encoder& encoder, const WTF::Variant<Types...>& variant, unsigned i)
{
ASSERT_UNUSED(i, !i);
encoder << WTF::get<0>(variant);
}
static Optional<WTF::Variant<Types...>> decode(Decoder& decoder, unsigned i)
{
ASSERT_UNUSED(i, !i);
Optional<typename WTF::variant_alternative<0, WTF::Variant<Types...>>::type> optional;
decoder >> optional;
if (!optional)
return WTF::nullopt;
return { WTFMove(*optional) };
}
};
template<typename... Types> struct ArgumentCoder<WTF::Variant<Types...>> {
static void encode(Encoder& encoder, const WTF::Variant<Types...>& variant)
{
unsigned i = variant.index();
encoder << i;
VariantCoder<sizeof...(Types) - 1, Types...>::encode(encoder, variant, i);
}
static Optional<WTF::Variant<Types...>> decode(Decoder& decoder)
{
Optional<unsigned> i;
decoder >> i;
if (!i)
return WTF::nullopt;
return VariantCoder<sizeof...(Types) - 1, Types...>::decode(decoder, *i);
}
};
template<> struct ArgumentCoder<WallTime> {
static void encode(Encoder&, const WallTime&);
static bool decode(Decoder&, WallTime&);
static Optional<WallTime> decode(Decoder&);
};
template<> struct ArgumentCoder<AtomicString> {
static void encode(Encoder&, const AtomicString&);
static bool decode(Decoder&, AtomicString&);
};
template<> struct ArgumentCoder<CString> {
static void encode(Encoder&, const CString&);
static bool decode(Decoder&, CString&);
};
template<> struct ArgumentCoder<String> {
static void encode(Encoder&, const String&);
static bool decode(Decoder&, String&);
static Optional<String> decode(Decoder&);
};
template<> struct ArgumentCoder<SHA1::Digest> {
static void encode(Encoder&, const SHA1::Digest&);
static bool decode(Decoder&, SHA1::Digest&);
};
}