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/**
* \file
* \author Egor Tensin <Egor.Tensin@gmail.com>
* \date 2015
* \copyright This file is licensed under the terms of the MIT License.
* See LICENSE.txt for details.
*/
#pragma once
#include "debug.hpp"
#include <aesni/all.h>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <functional>
#include <ostream>
#include <stdexcept>
#include <string>
#include <vector>
namespace aesni
{
class Error : public std::runtime_error
{
public:
Error(const AesNI_ErrorDetails& err_details)
: std::runtime_error(format_error_message(err_details))
{
copy_call_stack(err_details);
}
void for_each_in_call_stack(const std::function<void (void*, const std::string&)>& callback) const
{
aux::CallStackFormatter formatter;
std::for_each(m_call_stack, m_call_stack + m_call_stack_size, [&formatter, &callback] (void* addr)
{
callback(addr, formatter.format(addr));
});
}
private:
static std::string format_error_message(const AesNI_ErrorDetails& err_details)
{
std::vector<char> buf;
buf.resize(aesni_format_error(&err_details, NULL, 0));
aesni_format_error(&err_details, buf.data(), buf.size());
return { buf.begin(), buf.end() };
}
void copy_call_stack(const AesNI_ErrorDetails& err_details)
{
m_call_stack_size = err_details.call_stack_size;
std::memcpy(m_call_stack, err_details.call_stack, m_call_stack_size * sizeof(void*));
}
void* m_call_stack[AESNI_MAX_CALL_STACK_LENGTH];
std::size_t m_call_stack_size;
};
std::ostream& operator<<(std::ostream& os, const Error& e)
{
os << "AesNI error: " << e.what() << '\n';
os << "Call stack:\n";
e.for_each_in_call_stack([&os] (void* addr, const std::string& name)
{
os << '\t' << addr << ' ' << name << '\n';
});
return os;
}
class ErrorDetailsThrowsInDestructor
{
public:
ErrorDetailsThrowsInDestructor()
{
aesni_success(get());
}
~ErrorDetailsThrowsInDestructor()
{
if (aesni_is_error(aesni_get_error_code(get())))
throw Error(m_impl);
}
AesNI_ErrorDetails* get() { return &m_impl; }
operator AesNI_ErrorDetails*() { return get(); }
private:
AesNI_ErrorDetails m_impl;
};
}
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