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#pragma once
// utils.hpp - Useful stuff that hasn't been categorized.
//
// Copyright © ????-2004 Athena Dev Teams
// Copyright © 2004-2011 The Mana World Development Team
// Copyright © 2011-2014 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "fwd.hpp"
#include <cstring>
#include <ctime>
#include <type_traits>
#include "../ints/little.hpp"
#include "../strings/fwd.hpp"
#include "../strings/vstring.hpp"
#include "../generic/operators.hpp"
#include "../io/fwd.hpp"
namespace tmwa
{
template<class T>
struct is_trivially_copyable
: std::integral_constant<bool,
// come back when GCC actually implements the public traits properly
__has_trivial_copy(T)
&& __has_trivial_assign(T)
&& __has_trivial_destructor(T)>
{};
bool e_mail_check(XString email);
int config_switch (ZString str);
template<class T>
void really_memzero_this(T *v)
{
static_assert(is_trivially_copyable<T>::value, "only for mostly-pod types");
static_assert(std::is_class<T>::value || std::is_union<T>::value, "Only for user-defined structures (for now)");
memset(v, '\0', sizeof(*v));
}
template<class T, size_t n>
void really_memzero_this(T (&)[n]) = delete;
// Exists in place of time_t, to give it a predictable printf-format.
// (on x86 and amd64, time_t == long, but not on x32)
static_assert(sizeof(long long) >= sizeof(time_t), "long long >= time_t");
struct TimeT : Comparable
{
long long value;
// conversion
TimeT(time_t t=0) : value(t) {}
TimeT(struct tm t) : value(timegm(&t)) {}
operator time_t() const { return value; }
operator struct tm() const { time_t v = value; return *gmtime(&v); }
explicit operator bool() const { return value; }
bool operator !() const { return !value; }
// prevent surprises
template<class T>
TimeT(T) = delete;
template<class T>
operator T() const = delete;
static
TimeT now()
{
// poisoned, but this is still in header-land
return time(nullptr);
}
bool error() const
{
return value == -1;
}
bool okay() const
{
return !error();
}
};
inline
long long convert_for_printf(TimeT t)
{
return t.value;
}
// 2038 problem
inline __attribute__((warn_unused_result))
bool native_to_network(Little32 *net, TimeT nat)
{
time_t tmp = nat;
return native_to_network(net, static_cast<uint32_t>(tmp));
}
inline __attribute__((warn_unused_result))
bool network_to_native(TimeT *nat, Little32 net)
{
uint32_t tmp;
bool rv = network_to_native(&tmp, net);
*nat = static_cast<time_t>(tmp);
return rv;
}
inline __attribute__((warn_unused_result))
bool native_to_network(Little64 *net, TimeT nat)
{
time_t tmp = nat;
return native_to_network(net, static_cast<uint64_t>(tmp));
}
inline __attribute__((warn_unused_result))
bool network_to_native(TimeT *nat, Little64 net)
{
uint64_t tmp;
bool rv = network_to_native(&tmp, net);
*nat = static_cast<time_t>(tmp);
return rv;
}
struct timestamp_seconds_buffer : VString<19> {};
struct timestamp_milliseconds_buffer : VString<23> {};
void stamp_time(timestamp_seconds_buffer&, const TimeT *t=nullptr);
void stamp_time(timestamp_milliseconds_buffer&);
void log_with_timestamp(io::WriteFile& out, XString line);
// TODO VString?
#define TIMESTAMP_DUMMY "YYYY-MM-DD HH:MM:SS"
static_assert(sizeof(TIMESTAMP_DUMMY) == sizeof(timestamp_seconds_buffer),
"timestamp size");
#define WITH_TIMESTAMP(str) str TIMESTAMP_DUMMY
// str: prefix: YYYY-MM-DD HH:MM:SS
// sizeof: 01234567890123456789012345678
// str + sizeof: ^
// -1: ^
// there's probably a better way to do this now
#define REPLACE_TIMESTAMP(str, t) \
stamp_time( \
reinterpret_cast<timestamp_seconds_buffer *>( \
str + sizeof(str) \
)[-1], \
&t \
)
} // namespace tmwa
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