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#ifndef UTILS_HPP
#define UTILS_HPP
# include "../sanity.hpp"
# include <cstdio>
# include <cstring>
# include <type_traits>
# include "../strings/fwd.hpp"
# include "../strings/vstring.hpp"
# include "../io/fwd.hpp"
# include "const_array.hpp"
# include "operators.hpp"
# include "utils2.hpp"
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);
inline
void really_memcpy(uint8_t *dest, const uint8_t *src, size_t n)
{
memcpy(dest, src, n);
}
inline
void really_memmove(uint8_t *dest, const uint8_t *src, size_t n)
{
memmove(dest, src, n);
}
inline
bool really_memequal(const uint8_t *a, const uint8_t *b, size_t n)
{
return memcmp(a, b, n) == 0;
}
inline
void really_memset0(uint8_t *dest, size_t n)
{
memset(dest, '\0', n);
}
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(NULL);
}
bool error() const
{
return value == -1;
}
bool okay() const
{
return !error();
}
};
inline
long long convert_for_printf(TimeT t)
{
return t.value;
}
inline
long long& convert_for_scanf(TimeT& t)
{
return t.value;
}
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 \
)
#endif //UTILS_HPP
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