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/*
* Copyright (c) 2015, 2018 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* 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;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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.
*/
/* @file
* Serialization Interface Declarations
*/
#ifndef __SERIALIZE_HANDLERS_HH__
#define __SERIALIZE_HANDLERS_HH__
#include <iostream>
#include <type_traits>
#include <utility>
#include "base/str.hh"
/**
* @ingroup api_serialize
* @{
*/
// To add support for a new type of field that can be serialized, define
// template specializations of the two classes below, ParseParam and ShowParam,
// as described above each. The way ParseParam is specialized for std::string
// or ShowParam is specialied for bool can be used as examples.
/*
* A structure which should be specialized to contain a static method with the
* signature:
*
* bool parse(const std::string &s, T &value)
*
* which fills in value using the contents of s, and returns if that was
* successful.
*/
template <class T, class Enable=void>
struct ParseParam;
// Specialization for anything to_number can accept.
template <class T>
struct ParseParam<T, decltype(to_number("", std::declval<T&>()), void())>
{
static bool
parse(const std::string &s, T &value)
{
return to_number(s, value);
}
};
template <>
struct ParseParam<bool>
{
static bool
parse(const std::string &s, bool &value)
{
return to_bool(s, value);
}
};
template <>
struct ParseParam<std::string>
{
static bool
parse(const std::string &s, std::string &value)
{
// String requires no processing to speak of
value = s;
return true;
}
};
/*
* A structure which should be specialized to contain a static method with the
* signature:
*
* void show(std::ostream &os, const T &value)
*
* which outputs value to the stream os.
*
* This default implementation falls back to the << operator which should work
* for many types.
*/
template <class T, class Enabled=void>
struct ShowParam
{
static void show(std::ostream &os, const T &value) { os << value; }
};
// Handle characters specially so that we print their value, not the character
// they encode.
template <class T>
struct ShowParam<T, std::enable_if_t<std::is_same<char, T>::value ||
std::is_same<unsigned char, T>::value ||
std::is_same<signed char, T>::value>>
{
static void
show(std::ostream &os, const T &value)
{
if (std::is_signed<T>::value)
os << (int)value;
else
os << (unsigned int)value;
}
};
template <>
struct ShowParam<bool>
{
static void
show(std::ostream &os, const bool &value)
{
// Display bools as strings
os << (value ? "true" : "false");
}
};
/** @} */
#endif // __SERIALIZE_HANDLERS_HH__