mifr/subsurface
1
0
Fork 0
mirror of https://github.com/subsurface/subsurface.git synced 2025-02-19 22:16:15 +00:00
Code Issues Projects Releases Packages Wiki Activity

Move all core-functionality to subsurface-core

Browse source 
And adapt a new CMakeLists.txt file for it. On the way I've also
found out that we where double-compilling a few files. I've also
set the subsurface-core as a include_path but that was just to
reduce the noise on this commit, since I plan to remove it from
the include path to make it obligatory to specify something like

 include "subsurface-core/dive.h"

for the header files. Since the app is growing quite a bit we ended
up having a few different files with almost same name that did
similar things, I want to kill that (for instance Dive.h, dive.h,
PrintDive.h and such).

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Tomaz Canabrava 2015-09-02 20:52:34 -03:00 • committed by Dirk Hohndel
parent a079821423
commit 4c0156e3d5
105 changed files with 102 additions and 78 deletions
Download patch file Download diff file Expand all files Collapse all files

98
subsurface-core/time.c Normal file
View file

@ -0,0 +1,98 @@
#include <string.h>
#include "dive.h"
/*
* Convert 64-bit timestamp to 'struct tm' in UTC.
*
* On 32-bit machines, only do 64-bit arithmetic for the seconds
* part, after that we do everything in 'long'. 64-bit divides
* are unnecessary once you're counting minutes (32-bit minutes:
* 8000+ years).
*/
void utc_mkdate(timestamp_t timestamp, struct tm *tm)
{
static const int mdays[] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
};
static const int mdays_leap[] = {
31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
};
unsigned long val;
unsigned int leapyears;
int m;
const int *mp;
memset(tm, 0, sizeof(*tm));
/* seconds since 1970 -> minutes since 1970 */
tm->tm_sec = timestamp % 60;
val = timestamp /= 60;
/* Do the simple stuff */
tm->tm_min = val % 60;
val /= 60;
tm->tm_hour = val % 24;
val /= 24;
/* Jan 1, 1970 was a Thursday (tm_wday=4) */
tm->tm_wday = (val + 4) % 7;
/*
* Now we're in "days since Jan 1, 1970". To make things easier,
* let's make it "days since Jan 1, 1968", since that's a leap-year
*/
val += 365 + 366;
/* This only works up until 2099 (2100 isn't a leap-year) */
leapyears = val / (365 * 4 + 1);
val %= (365 * 4 + 1);
tm->tm_year = 68 + leapyears * 4;
/* Handle the leap-year itself */
mp = mdays_leap;
if (val > 365) {
tm->tm_year++;
val -= 366;
tm->tm_year += val / 365;
val %= 365;
mp = mdays;
}
for (m = 0; m < 12; m++) {
if (val < *mp)
break;
val -= *mp++;
}
tm->tm_mday = val + 1;
tm->tm_mon = m;
}
timestamp_t utc_mktime(struct tm *tm)
{
static const int mdays[] = {
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
};
int year = tm->tm_year;
int month = tm->tm_mon;
int day = tm->tm_mday;
/* First normalize relative to 1900 */
if (year < 70)
year += 100;
else if (year > 1900)
year -= 1900;
/* Normalized to Jan 1, 1970: unix time */
year -= 70;
if (year < 0 || year > 129) /* algo only works for 1970-2099 */
return -1;
if (month < 0 || month > 11) /* array bounds */
return -1;
if (month < 2 || (year + 2) % 4)
day--;
if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0)
return -1;
return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24 * 60 * 60UL +
tm->tm_hour * 60 * 60 + tm->tm_min * 60 + tm->tm_sec;
}