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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Concepts.h>
#include <AK/Forward.h>
#include <AK/NumericLimits.h>
#include <AK/StdLibExtras.h>
#include <AK/String.h>
#include <LibIPC/Forward.h>
#include <LibIPC/Message.h>
namespace IPC {
template<typename T>
inline bool decode(Decoder&, T&)
{
static_assert(DependentFalse<T>, "Base IPC::decoder() instantiated");
VERIFY_NOT_REACHED();
}
class Decoder {
public:
Decoder(InputMemoryStream& stream, int sockfd)
: m_stream(stream)
, m_sockfd(sockfd)
{
}
bool decode(bool&);
bool decode(u8&);
bool decode(u16&);
bool decode(u32&);
bool decode(u64&);
bool decode(i8&);
bool decode(i16&);
bool decode(i32&);
bool decode(i64&);
bool decode(float&);
bool decode(String&);
bool decode(ByteBuffer&);
bool decode(URL&);
bool decode(Dictionary&);
bool decode(File&);
template<typename K, typename V>
bool decode(HashMap<K, V>& hashmap)
{
u32 size;
if (!decode(size) || size > NumericLimits<i32>::max())
return false;
for (size_t i = 0; i < size; ++i) {
K key;
if (!decode(key))
return false;
V value;
if (!decode(value))
return false;
hashmap.set(move(key), move(value));
}
return true;
}
template<Enum T>
bool decode(T& enum_value)
{
UnderlyingType<T> inner_value;
if (!decode(inner_value))
return false;
enum_value = T(inner_value);
return true;
}
template<typename T>
bool decode(T& value)
{
return IPC::decode(*this, value);
}
template<typename T>
bool decode(Vector<T>& vector)
{
u64 size;
if (!decode(size) || size > NumericLimits<i32>::max())
return false;
for (size_t i = 0; i < size; ++i) {
T value;
if (!decode(value))
return false;
vector.append(move(value));
}
return true;
}
template<typename T>
bool decode(Optional<T>& optional)
{
bool has_value;
if (!decode(has_value))
return false;
if (!has_value) {
optional = {};
return true;
}
T value;
if (!decode(value))
return false;
optional = move(value);
return true;
}
private:
InputMemoryStream& m_stream;
int m_sockfd { -1 };
};
}
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