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/* -*-c++-*-

This file is part of LiveCode.

LiveCode is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License v3 as published by the Free

Software Foundation.

LiveCode 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 LiveCode. If not see <http://www.gnu.org/licenses/>. */

#include <foundation.h>

#include <foundation-auto.h>

#include <time.h>

#ifndef _WINDOWS

# include <sys/time.h>

#else

# include <windows.h>

#endif

#if defined(__WINDOWS__)

static bool

MCDateGetTimeInfo(bool t_is_local,

struct tm & r_timeinfo,

long & r_timezone)

{

if (t_is_local)

{

_get_timezone(&r_timezone);

}

else

{

r_timezone = 0;

}

time_t t_now;

time(&t_now);

/* Windows doesn't have localtime_r(), but it does have an equivalent

* function with the arguments in the opposite order! */

if (0 != (t_is_local

? localtime_s(&r_timeinfo, &t_now)

: gmtime_s(&r_timeinfo, &t_now)))

{

return false;

}

return true;

}

#elif defined(__MAC__) || defined(__IOS__)

static bool

MCDateGetTimeInfo(bool t_is_local,

struct tm & r_timeinfo,

long & r_timezone)

{

time_t t_now;

time(&t_now);

if (NULL == (t_is_local

? localtime_r(&t_now, &r_timeinfo)

: gmtime_r(&t_now, &r_timeinfo)))

{

return false;

}

r_timezone = r_timeinfo.tm_gmtoff;

return true;

}

#elif defined(__LINUX__) || defined(__ANDROID__) || defined(__EMSCRIPTEN__)

static bool

MCDateGetTimeInfo(bool t_is_local,

struct tm & r_timeinfo,

long & r_timezone)

{

time_t t_now;

time (&t_now);

if (NULL == (t_is_local

? localtime_r(&t_now, &r_timeinfo)

: gmtime_r(&t_now, &r_timeinfo)))

{

return false;

}

if (t_is_local)

{

/* FIXME This may be expensive, but is probably required if

* MCDateGetTimeInfo() is to behave properly over summer time

* changes. */

tzset();

r_timezone = timezone;

}

else

{

r_timezone = 0;

}

return true;

}

#else

# error "MCDateGetTimeInfo() not implemented for this platform"

#endif

static void

MCDateExecGetDate(bool t_is_local,

MCProperListRef & r_datetime)

{

struct tm t_timeinfo;

long t_timezone;

if (!MCDateGetTimeInfo(t_is_local, t_timeinfo, t_timezone))

{

return;

}

// tm_mon is number of months since January

t_timeinfo . tm_mon++;

// tm_year is number of years since 1900

t_timeinfo . tm_year += 1900;

MCAutoNumberRef t_year, t_month, t_day, t_hour, t_minute, t_second,

t_gmtoff;

if (!(MCNumberCreateWithInteger (t_timeinfo.tm_year, &t_year) &&

MCNumberCreateWithInteger (t_timeinfo.tm_mon, &t_month) &&

MCNumberCreateWithInteger (t_timeinfo.tm_mday, &t_day) &&

MCNumberCreateWithInteger (t_timeinfo.tm_hour, &t_hour) &&

MCNumberCreateWithInteger (t_timeinfo.tm_min, &t_minute) &&

MCNumberCreateWithInteger (t_timeinfo.tm_sec, &t_second) &&

MCNumberCreateWithInteger (t_timezone, &t_gmtoff)))

return;

const MCValueRef t_elements[] = {*t_year, *t_month, *t_day,

*t_hour, *t_minute, *t_second,

*t_gmtoff};

if (!MCProperListCreate (t_elements, 7, r_datetime))

return;

}

extern "C" MC_DLLEXPORT_DEF void

MCDateExecGetLocalDate (MCProperListRef & r_datetime)

{

MCDateExecGetDate(true, r_datetime);

}

extern "C" MC_DLLEXPORT_DEF void

MCDateExecGetUniversalDate(MCProperListRef & r_datetime)

{

MCDateExecGetDate(false, r_datetime);

}

extern "C" MC_DLLEXPORT_DEF void

MCDateExecGetUniversalTime (double& r_time)

{

#ifndef _WINDOWS

struct timeval tv;

gettimeofday(&tv, NULL);

r_time = tv.tv_sec + (double)tv.tv_usec / 1000000.0;

#else

SYSTEMTIME t_localtime;

FILETIME t_filetime;

GetLocalTime(&t_localtime);

SystemTimeToFileTime(&t_localtime, &t_filetime);

// The Win32 filetime counts 100ns intervals since 1st Jan 1601

uint64_t t_time_win32;

double t_time_unix;

t_time_win32 = (uint64_t(t_filetime.dwHighDateTime) << 32) | t_filetime.dwLowDateTime;

t_time_unix = (double(t_time_win32) / 10000000.0) - 11644473600.0;

r_time = t_time_unix;

#endif

}

////////////////////////////////////////////////////////////////////////////////////////////////////

extern "C" bool com_livecode_date_Initialize(void)

{

return true;

}

extern "C" void com_livecode_date_Finalize(void)

{

}

////////////////////////////////////////////////////////////////////////////////////////////////////