/src/php-src/ext/date/lib/unixtime2tm.c

Source (jump to first uncovered line)
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015-2021 Derick Rethans
 * Copyright (c) 2021 MongoDB
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "timelib.h"
#include "timelib_private.h"

void timelib_unixtime2date(timelib_sll ts, timelib_sll *y, timelib_sll *m, timelib_sll *d)
{
  timelib_sll days, era, t;
  timelib_ull day_of_era, year_of_era, day_of_year, month_portion;

  /* Calculate days since algorithm's epoch (0000-03-01) */
  days = ts / SECS_PER_DAY + HINNANT_EPOCH_SHIFT;

  /* Adjustment for a negative time portion */
  t = ts % SECS_PER_DAY;
  days += (t < 0) ? -1 : 0;

  /* Calculate year, month, and day. Algorithm from:
   * http://howardhinnant.github.io/date_algorithms.html#civil_from_days */
  era = (days >= 0 ? days : days - DAYS_PER_ERA + 1) / DAYS_PER_ERA;
  day_of_era = days - era * DAYS_PER_ERA;
  year_of_era = (day_of_era - day_of_era / 1460 + day_of_era / 36524 - day_of_era / 146096) / DAYS_PER_YEAR;
  *y = year_of_era + era * YEARS_PER_ERA;
  day_of_year = day_of_era - (DAYS_PER_YEAR * year_of_era + year_of_era / 4 - year_of_era / 100);
  month_portion = (5 * day_of_year + 2) / 153;
  *d = day_of_year - (153 * month_portion + 2) / 5 + 1;
  *m = month_portion + (month_portion < 10 ? 3 : -9);
  *y += (*m <= 2);

  TIMELIB_DEBUG(printf("A: ts=%lld, year=%lld, month=%lld, day=%lld,", ts, *y, *m, *d););
}

/* Converts a Unix timestamp value into broken down time, in GMT */
void timelib_unixtime2gmt(timelib_time* tm, timelib_sll ts)
{
  timelib_sll remainder;
  timelib_sll hours, minutes, seconds;

  timelib_unixtime2date(ts, &tm->y, &tm->m, &tm->d);
  remainder = ts % SECS_PER_DAY;
  remainder += (remainder < 0) * SECS_PER_DAY;

  /* That was the date, now we do the time */
  hours = remainder / 3600;
  minutes = (remainder - hours * 3600) / 60;
  seconds = remainder % 60;
  TIMELIB_DEBUG(printf(" hour=%lld, minute=%lld, second=%lld\n", hours, minutes, seconds););

  tm->h = hours;
  tm->i = minutes;
  tm->s = seconds;
  tm->z = 0;
  tm->dst = 0;
  tm->sse = ts;
  tm->sse_uptodate = 1;
  tm->tim_uptodate = 1;
  tm->is_localtime = 0;
}

void timelib_update_from_sse(timelib_time *tm)
{
  timelib_sll sse;
  int z = tm->z;
  signed int dst = tm->dst;

  sse = tm->sse;

  switch (tm->zone_type) {
    case TIMELIB_ZONETYPE_ABBR:
    case TIMELIB_ZONETYPE_OFFSET: {
      timelib_unixtime2gmt(tm, tm->sse + tm->z + (tm->dst * 3600));

      goto cleanup;
    }

    case TIMELIB_ZONETYPE_ID: {
      int32_t  offset = 0;

      timelib_get_time_zone_offset_info(tm->sse, tm->tz_info, &offset, NULL, NULL);
      timelib_unixtime2gmt(tm, tm->sse + offset);

      goto cleanup;
    }

    default:
      timelib_unixtime2gmt(tm, tm->sse);
      goto cleanup;
  }
cleanup:
  tm->sse = sse;
  tm->is_localtime = 1;
  tm->have_zone = 1;
  tm->z = z;
  tm->dst = dst;
}

void timelib_unixtime2local(timelib_time *tm, timelib_sll ts)
{
  timelib_time_offset *gmt_offset;
  timelib_tzinfo      *tz = tm->tz_info;

  switch (tm->zone_type) {
    case TIMELIB_ZONETYPE_ABBR:
    case TIMELIB_ZONETYPE_OFFSET: {
      int z = tm->z;
      signed int dst = tm->dst;

      timelib_unixtime2gmt(tm, ts + tm->z + (tm->dst * 3600));

      tm->sse = ts;
      tm->z = z;
      tm->dst = dst;
      break;
    }

    case TIMELIB_ZONETYPE_ID:
      gmt_offset = timelib_get_time_zone_info(ts, tz);
      timelib_unixtime2gmt(tm, ts + gmt_offset->offset);

      /* we need to reset the sse here as unixtime2gmt modifies it */
      tm->sse = ts;
      tm->dst = gmt_offset->is_dst;
      tm->z = gmt_offset->offset;
      tm->tz_info = tz;

      timelib_time_tz_abbr_update(tm, gmt_offset->abbr);
      timelib_time_offset_dtor(gmt_offset);
      break;

    default:
      tm->is_localtime = 0;
      tm->have_zone = 0;
      return;
  }

  tm->is_localtime = 1;
  tm->have_zone = 1;
}

void timelib_set_timezone_from_offset(timelib_time *t, timelib_sll utc_offset)
{
  if (t->tz_abbr) {
    timelib_free(t->tz_abbr);
  }
  t->tz_abbr = NULL;

  t->z = utc_offset;
  t->have_zone = 1;
  t->zone_type = TIMELIB_ZONETYPE_OFFSET;
  t->dst = 0;
  t->tz_info = NULL;
}

void timelib_set_timezone_from_abbr(timelib_time *t, timelib_abbr_info abbr_info)
{
  if (t->tz_abbr) {
    timelib_free(t->tz_abbr);
  }
  t->tz_abbr = timelib_strdup(abbr_info.abbr);

  t->z = abbr_info.utc_offset;
  t->have_zone = 1;
  t->zone_type = TIMELIB_ZONETYPE_ABBR;
  t->dst = abbr_info.dst;
  t->tz_info = NULL;
}

void timelib_set_timezone(timelib_time *t, timelib_tzinfo *tz)
{
  timelib_time_offset *gmt_offset;

  gmt_offset = timelib_get_time_zone_info(t->sse, tz);
  t->z = gmt_offset->offset;
/*
  if (t->dst != gmt_offset->is_dst) {
    printf("ERROR (%d, %d)\n", t->dst, gmt_offset->is_dst);
    exit(1);
  }
*/
  t->dst = gmt_offset->is_dst;
  t->tz_info = tz;
  if (t->tz_abbr) {
    timelib_free(t->tz_abbr);
  }
  t->tz_abbr = timelib_strdup(gmt_offset->abbr);
  timelib_time_offset_dtor(gmt_offset);

  t->have_zone = 1;
  t->zone_type = TIMELIB_ZONETYPE_ID;
}

/* Converts the time stored in the struct to localtime if localtime = true,
 * otherwise it converts it to gmttime. This is only done when necessary
 * of course. */
int timelib_apply_localtime(timelib_time *t, unsigned int localtime)
{
  if (localtime) {
    /* Converting from GMT time to local time */
    TIMELIB_DEBUG(printf("Converting from GMT time to local time\n"););

    /* Check if TZ is set */
    if (!t->tz_info) {
      TIMELIB_DEBUG(printf("E: No timezone configured, can't switch to local time\n"););
      return -1;
    }

    timelib_unixtime2local(t, t->sse);
  } else {
    /* Converting from local time to GMT time */
    TIMELIB_DEBUG(printf("Converting from local time to GMT time\n"););

    timelib_unixtime2gmt(t, t->sse);
  }
  return 0;
}

Coverage Report

Created: 2025-06-13 06:43

Line	Count	Source (jump to first uncovered line)
1		/*
2		* The MIT License (MIT)
3		*
4		* Copyright (c) 2015-2021 Derick Rethans
5		* Copyright (c) 2021 MongoDB
6		*
7		* Permission is hereby granted, free of charge, to any person obtaining a copy
8		* of this software and associated documentation files (the "Software"), to deal
9		* in the Software without restriction, including without limitation the rights
10		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11		* copies of the Software, and to permit persons to whom the Software is
12		* furnished to do so, subject to the following conditions:
13		*
14		* The above copyright notice and this permission notice shall be included in
15		* all copies or substantial portions of the Software.
16		*
17		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20		* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23		* THE SOFTWARE.
24		*/
25
26		#include "timelib.h"
27		#include "timelib_private.h"
28
29		void timelib_unixtime2date(timelib_sll ts, timelib_sll y, timelib_sll m, timelib_sll *d)
30	5.52k	{
31	5.52k	timelib_sll days, era, t;
32	5.52k	timelib_ull day_of_era, year_of_era, day_of_year, month_portion;
33
34		/* Calculate days since algorithm's epoch (0000-03-01) */
35	5.52k	days = ts / SECS_PER_DAY + HINNANT_EPOCH_SHIFT;
36
37		/* Adjustment for a negative time portion */
38	5.52k	t = ts % SECS_PER_DAY;
39	5.52k	days += (t < 0) ? -1 : 0;
40
41		/* Calculate year, month, and day. Algorithm from:
42		* http://howardhinnant.github.io/date_algorithms.html#civil_from_days */
43	5.52k	era = (days >= 0 ? days : days - DAYS_PER_ERA + 1) / DAYS_PER_ERA;
44	5.52k	day_of_era = days - era * DAYS_PER_ERA;
45	5.52k	year_of_era = (day_of_era - day_of_era / 1460 + day_of_era / 36524 - day_of_era / 146096) / DAYS_PER_YEAR;
46	5.52k	y = year_of_era + era YEARS_PER_ERA;
47	5.52k	day_of_year = day_of_era - (DAYS_PER_YEAR * year_of_era + year_of_era / 4 - year_of_era / 100);
48	5.52k	month_portion = (5 * day_of_year + 2) / 153;
49	5.52k	d = day_of_year - (153 month_portion + 2) / 5 + 1;
50	5.52k	*m = month_portion + (month_portion < 10 ? 3 : -9);
51	5.52k	y += (m <= 2);
52
53	5.52k	TIMELIB_DEBUG(printf("A: ts=%lld, year=%lld, month=%lld, day=%lld,", ts, y, m, *d););
54	5.52k	}
55
56		/* Converts a Unix timestamp value into broken down time, in GMT */
57		void timelib_unixtime2gmt(timelib_time* tm, timelib_sll ts)
58	5.52k	{
59	5.52k	timelib_sll remainder;
60	5.52k	timelib_sll hours, minutes, seconds;
61
62	5.52k	timelib_unixtime2date(ts, &tm->y, &tm->m, &tm->d);
63	5.52k	remainder = ts % SECS_PER_DAY;
64	5.52k	remainder += (remainder < 0) * SECS_PER_DAY;
65
66		/* That was the date, now we do the time */
67	5.52k	hours = remainder / 3600;
68	5.52k	minutes = (remainder - hours * 3600) / 60;
69	5.52k	seconds = remainder % 60;
70	5.52k	TIMELIB_DEBUG(printf(" hour=%lld, minute=%lld, second=%lld\n", hours, minutes, seconds););
71
72	5.52k	tm->h = hours;
73	5.52k	tm->i = minutes;
74	5.52k	tm->s = seconds;
75	5.52k	tm->z = 0;
76	5.52k	tm->dst = 0;
77	5.52k	tm->sse = ts;
78	5.52k	tm->sse_uptodate = 1;
79	5.52k	tm->tim_uptodate = 1;
80	5.52k	tm->is_localtime = 0;
81	5.52k	}
82
83		void timelib_update_from_sse(timelib_time *tm)
84	244	{
85	244	timelib_sll sse;
86	244	int z = tm->z;
87	244	signed int dst = tm->dst;
88
89	244	sse = tm->sse;
90
91	244	switch (tm->zone_type) {
92	0	case TIMELIB_ZONETYPE_ABBR:
93	13	case TIMELIB_ZONETYPE_OFFSET: {
94	13	timelib_unixtime2gmt(tm, tm->sse + tm->z + (tm->dst * 3600));
95
96	13	goto cleanup;
97	0	}
98
99	231	case TIMELIB_ZONETYPE_ID: {
100	231	int32_t offset = 0;
101
102	231	timelib_get_time_zone_offset_info(tm->sse, tm->tz_info, &offset, NULL, NULL);
103	231	timelib_unixtime2gmt(tm, tm->sse + offset);
104
105	231	goto cleanup;
106	0	}
107
108	0	default:
109	0	timelib_unixtime2gmt(tm, tm->sse);
110	0	goto cleanup;
111	244	}
112	244	cleanup:
113	244	tm->sse = sse;
114	244	tm->is_localtime = 1;
115	244	tm->have_zone = 1;
116	244	tm->z = z;
117	244	tm->dst = dst;
118	244	}
119
120		void timelib_unixtime2local(timelib_time *tm, timelib_sll ts)
121	5.28k	{
122	5.28k	timelib_time_offset *gmt_offset;
123	5.28k	timelib_tzinfo *tz = tm->tz_info;
124
125	5.28k	switch (tm->zone_type) {
126	25	case TIMELIB_ZONETYPE_ABBR:
127	25	case TIMELIB_ZONETYPE_OFFSET: {
128	25	int z = tm->z;
129	25	signed int dst = tm->dst;
130
131	25	timelib_unixtime2gmt(tm, ts + tm->z + (tm->dst * 3600));
132
133	25	tm->sse = ts;
134	25	tm->z = z;
135	25	tm->dst = dst;
136	25	break;
137	25	}
138
139	5.25k	case TIMELIB_ZONETYPE_ID:
140	5.25k	gmt_offset = timelib_get_time_zone_info(ts, tz);
141	5.25k	timelib_unixtime2gmt(tm, ts + gmt_offset->offset);
142
143		/* we need to reset the sse here as unixtime2gmt modifies it */
144	5.25k	tm->sse = ts;
145	5.25k	tm->dst = gmt_offset->is_dst;
146	5.25k	tm->z = gmt_offset->offset;
147	5.25k	tm->tz_info = tz;
148
149	5.25k	timelib_time_tz_abbr_update(tm, gmt_offset->abbr);
150	5.25k	timelib_time_offset_dtor(gmt_offset);
151	5.25k	break;
152
153	0	default:
154	0	tm->is_localtime = 0;
155	0	tm->have_zone = 0;
156	0	return;
157	5.28k	}
158
159	5.28k	tm->is_localtime = 1;
160	5.28k	tm->have_zone = 1;
161	5.28k	}
162
163		void timelib_set_timezone_from_offset(timelib_time *t, timelib_sll utc_offset)
164	0	{
165	0	if (t->tz_abbr) {
166	0	timelib_free(t->tz_abbr);
167	0	}
168	0	t->tz_abbr = NULL;
169
170	0	t->z = utc_offset;
171	0	t->have_zone = 1;
172	0	t->zone_type = TIMELIB_ZONETYPE_OFFSET;
173	0	t->dst = 0;
174	0	t->tz_info = NULL;
175	0	}
176
177		void timelib_set_timezone_from_abbr(timelib_time *t, timelib_abbr_info abbr_info)
178	0	{
179	0	if (t->tz_abbr) {
180	0	timelib_free(t->tz_abbr);
181	0	}
182	0	t->tz_abbr = timelib_strdup(abbr_info.abbr);
183
184	0	t->z = abbr_info.utc_offset;
185	0	t->have_zone = 1;
186	0	t->zone_type = TIMELIB_ZONETYPE_ABBR;
187	0	t->dst = abbr_info.dst;
188	0	t->tz_info = NULL;
189	0	}
190
191		void timelib_set_timezone(timelib_time t, timelib_tzinfo tz)
192	236	{
193	236	timelib_time_offset *gmt_offset;
194
195	236	gmt_offset = timelib_get_time_zone_info(t->sse, tz);
196	236	t->z = gmt_offset->offset;
197		/*
198		if (t->dst != gmt_offset->is_dst) {
199		printf("ERROR (%d, %d)\n", t->dst, gmt_offset->is_dst);
200		exit(1);
201		}
202		*/
203	236	t->dst = gmt_offset->is_dst;
204	236	t->tz_info = tz;
205	236	if (t->tz_abbr) {
206	236	timelib_free(t->tz_abbr);
207	236	}
208	236	t->tz_abbr = timelib_strdup(gmt_offset->abbr);
209	236	timelib_time_offset_dtor(gmt_offset);
210
211	236	t->have_zone = 1;
212	236	t->zone_type = TIMELIB_ZONETYPE_ID;
213	236	}
214
215		/* Converts the time stored in the struct to localtime if localtime = true,
216		* otherwise it converts it to gmttime. This is only done when necessary
217		* of course. */
218		int timelib_apply_localtime(timelib_time *t, unsigned int localtime)
219	0	{
220	0	if (localtime) {
221		/* Converting from GMT time to local time */
222	0	TIMELIB_DEBUG(printf("Converting from GMT time to local time\n"););
223
224		/* Check if TZ is set */
225	0	if (!t->tz_info) {
226	0	TIMELIB_DEBUG(printf("E: No timezone configured, can't switch to local time\n"););
227	0	return -1;
228	0	}
229
230	0	timelib_unixtime2local(t, t->sse);
231	0	} else {
232		/* Converting from local time to GMT time */
233	0	TIMELIB_DEBUG(printf("Converting from local time to GMT time\n"););
234
235	0	timelib_unixtime2gmt(t, t->sse);
236	0	}
237	0	return 0;
238	0	}