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/*
* The Rin Library – time module
*
* Copyright (C) 2017 Gediminas Jakutis
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; version 2.1
* of the License.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "rin/time.h"
#include "time_private.h"
struct timespec rin_time_add(const struct timespec * const a, const struct timespec * const b)
{
struct timespec ret;
ret.tv_sec = a->tv_sec + b->tv_sec;
ret.tv_nsec = a->tv_nsec + b->tv_nsec;
return rin_time_normalize(&ret);
}
struct timespec rin_time_sub(const struct timespec * const a, const struct timespec * const b)
{
struct timespec ret;
ret.tv_sec = a->tv_sec - b->tv_sec;
ret.tv_nsec = a->tv_nsec - b->tv_nsec;
return rin_time_normalize(&ret);
}
struct timespec rin_time_normalize(const struct timespec * const t)
{
struct timespec ret;
ret = *t;
if (ret.tv_nsec >= 0 && ret.tv_nsec <= tv_nsec_max) {
return ret;
}
if (ret.tv_nsec > 0) {
ret.tv_sec += ret.tv_nsec / (tv_nsec_max + 1);
ret.tv_nsec = ret.tv_nsec % (tv_nsec_max + 1);
} else {
ret.tv_sec += ret.tv_nsec / (tv_nsec_max + 1) - 1;
ret.tv_nsec = (tv_nsec_max + 1) - (-ret.tv_nsec) % (tv_nsec_max + 1);
}
return ret;
}
long int rin_time_cmp(const struct timespec * const a, const struct timespec * const b)
{
if (a->tv_sec != b->tv_sec) {
return a->tv_sec - b->tv_sec;
} else {
return a->tv_nsec - b->tv_nsec;
}
}
unsigned int rin_time_cmp_less(const struct timespec * const a, const struct timespec * const b)
{
if (a->tv_sec > b->tv_sec) {
return 0;
} else if (a->tv_sec < b->tv_sec) {
return 1;
} else {
return a->tv_nsec < b->tv_nsec;
}
}
unsigned int rin_time_cmp_more(const struct timespec * const a, const struct timespec * const b)
{
if (a->tv_sec < b->tv_sec) {
return 0;
} else if (a->tv_sec > b->tv_sec) {
return 1;
} else {
return a->tv_nsec > b->tv_nsec;
}
}
unsigned int rin_time_cmp_lessequal(const struct timespec * const a, const struct timespec * const b)
{
if (a->tv_sec > b->tv_sec) {
return 0;
} else if (a->tv_sec < b->tv_sec) {
return 1;
} else {
return a->tv_nsec <= b->tv_nsec;
}
}
unsigned int rin_time_cmp_moreequal(const struct timespec * const a, const struct timespec * const b)
{
if (a->tv_sec < b->tv_sec) {
return 0;
} else if (a->tv_sec > b->tv_sec) {
return 1;
} else {
return a->tv_nsec >= b->tv_nsec;
}
}
unsigned int rin_time_cmp_equal(const struct timespec * const a, const struct timespec * const b)
{
return a->tv_sec == b->tv_sec && a->tv_nsec == b->tv_nsec;
}
unsigned int rin_time_cmp_nonequal(const struct timespec * const a, const struct timespec * const b)
{
return a->tv_sec != b->tv_sec || a->tv_nsec != b->tv_nsec;
}
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