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// Copyright (c) 2022-2023, The Monero Project
// 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.
//
// 3. Neither the name of the copyright holder 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 HOLDER 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.
#pragma once
#include <exception>
#include <system_error>
#include <type_traits>
#include "misc_log_ex.h"
//! Print default `code` message followed by optional message to debug log then throw `code`.
#define WIRE_DLOG_THROW_(code, ...) \
do \
{ \
MDEBUG( get_string(code) __VA_ARGS__ ); \
throw ::wire::exception_t<decltype(code)>{code}; \
} \
while (0)
//! Print default `code` message followed by `msg` to debug log then throw `code`.
#define WIRE_DLOG_THROW(code, msg) \
WIRE_DLOG_THROW_(code, << ": " << msg)
namespace wire
{
namespace error
{
enum class schema : int
{
none = 0, //!< Must be zero for `expect<..>`
array, //!< Expected an array value
array_max_element,//!< Exceeded max array count
array_min_size, //!< Below min element wire size
binary, //!< Expected a binary value of variable length
boolean, //!< Expected a boolean value
enumeration, //!< Expected a value from a specific set
fixed_binary, //!< Expected a binary value of fixed length
integer, //!< Expected an integer value
invalid_key, //!< Key for object is invalid
larger_integer, //!< Expected a larger integer value
maximum_depth, //!< Hit maximum number of object+array tracking
missing_key, //!< Missing required key for object
number, //!< Expected a number (integer or float) value
object, //!< Expected object value
smaller_integer, //!< Expected a smaller integer value
string, //!< Expected string value
};
//! \return Error message string.
const char* get_string(schema value) noexcept;
//! \return Category for `schema_error`.
const std::error_category& schema_category() noexcept;
//! \return Error code with `value` and `schema_category()`.
inline std::error_code make_error_code(const schema value) noexcept
{
return std::error_code{int(value), schema_category()};
}
} // error
//! `std::exception` doesn't require dynamic memory like `std::runtime_error`
struct exception : std::exception
{
exception() noexcept
: std::exception()
{}
exception(const exception&) = default;
exception& operator=(const exception&) = default;
virtual ~exception() noexcept
{}
virtual std::error_code code() const noexcept = 0;
};
template<typename T>
class exception_t final : public wire::exception
{
static_assert(std::is_enum<T>(), "only enumerated types allowed");
T value;
public:
exception_t(T value) noexcept
: value(value)
{}
exception_t(const exception_t&) = default;
~exception_t() = default;
exception_t& operator=(const exception_t&) = default;
const char* what() const noexcept override final
{
static_assert(noexcept(noexcept(get_string(value))), "get_string function must be noexcept");
return get_string(value);
}
std::error_code code() const noexcept override final
{
static_assert(noexcept(noexcept(make_error_code(value))), "make_error_code funcion must be noexcept");
return make_error_code(value);
}
};
} // wire
namespace std
{
template<>
struct is_error_code_enum<wire::error::schema>
: true_type
{};
}
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