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amiga-tz/timezoneinfo.c
2015-07-10 23:50:02 +02:00

75 lines
2.6 KiB
C

/*
* Copyright (c) 2015 Carsten Larsen
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/
#include <stdio.h>
#include "amiga_tz.h"
#include "private.h"
#include "version.h"
const char *vers = "\0$VER: TimeZoneInfo" AMIGA_VERSION;
int main(const int argc, char *argv[])
{
struct tm tm;
struct offset {
int hours, mins;
} offset;
timezone_t tz = NULL;
time_t now = time(NULL);
char *ret = (char*)AllocVec(ENVSIZE, MEMF_ANY | MEMF_CLEAR);
if(GetVar((STRPTR)TZVARIABLE, (STRPTR)ret, ENVSIZE - 1, GVF_GLOBAL_ONLY) == -1) {
strcpy(ret, "unknown");
tz = tzalloc(0);
} else {
tz = tzalloc(ret);
underscore_remove(ret);
}
if (tz) {
localtime_rz(tz, &now, &tm);
tzfree(tz);
offset.hours = tm.tm_gmtoff / 60 / 60;
offset.mins = tm.tm_gmtoff / 60 - offset.hours * 60;
FPrintf(Output(), (STRPTR)"Location is %s\n", ret);
FPrintf(Output(), (STRPTR)"Time zone is %s\n", tm.tm_zone);
FPrintf(Output(), (STRPTR)"GMT offset is %ld hours and %ld minutes.\n", offset.hours, offset.mins);
if (tm.tm_isdst) {
FPrintf(Output(), (STRPTR)"It is daylight-saving time.\n");
} else {
FPrintf(Output(), (STRPTR)"It is not daylight-saving time.\n");
}
} else {
FPrintf(Output(), (STRPTR)"Timezone not known.\n");
}
FreeVec(ret);
return RETURN_OK;
}