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      1 /* $NetBSD: t_strptime.c,v 1.17 2024/03/26 21:52:23 rillig Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1998, 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by David Laight.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __COPYRIGHT("@(#) Copyright (c) 2008\
     34  The NetBSD Foundation, inc. All rights reserved.");
     35 __RCSID("$NetBSD: t_strptime.c,v 1.17 2024/03/26 21:52:23 rillig Exp $");
     36 
     37 #include <errno.h>
     38 #include <inttypes.h>
     39 #include <stdio.h>
     40 #include <stdlib.h>
     41 #include <time.h>
     42 
     43 #include <atf-c.h>
     44 
     45 static void
     46 h_pass(const char *buf, const char *fmt, int len,
     47     int tm_sec, int tm_min, int tm_hour, int tm_mday,
     48     int tm_mon, int tm_year, int tm_wday, int tm_yday)
     49 {
     50 	struct tm tm = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, NULL };
     51 	const char *ret, *exp;
     52 
     53 	exp = buf + len;
     54 	ret = strptime(buf, fmt, &tm);
     55 
     56 	ATF_CHECK_MSG(ret == exp,
     57 	    "strptime(\"%s\", \"%s\", tm): incorrect return code: "
     58 	    "expected: %p, got: %p", buf, fmt, exp, ret);
     59 
     60 #define H_REQUIRE_FIELD(field)						\
     61 		ATF_CHECK_MSG(tm.field == field,			\
     62 		    "strptime(\"%s\", \"%s\", tm): incorrect %s: "	\
     63 		    "expected: %d, but got: %d", buf, fmt,		\
     64 		    ___STRING(field), field, tm.field)
     65 
     66 	H_REQUIRE_FIELD(tm_sec);
     67 	H_REQUIRE_FIELD(tm_min);
     68 	H_REQUIRE_FIELD(tm_hour);
     69 	H_REQUIRE_FIELD(tm_mday);
     70 	H_REQUIRE_FIELD(tm_mon);
     71 	H_REQUIRE_FIELD(tm_year);
     72 	H_REQUIRE_FIELD(tm_wday);
     73 	H_REQUIRE_FIELD(tm_yday);
     74 
     75 #undef H_REQUIRE_FIELD
     76 }
     77 
     78 static void
     79 h_fail(const char *buf, const char *fmt)
     80 {
     81 	struct tm tm = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, NULL };
     82 
     83 	ATF_CHECK_MSG(strptime(buf, fmt, &tm) == NULL, "strptime(\"%s\", "
     84 	    "\"%s\", &tm) should fail, but it didn't", buf, fmt);
     85 }
     86 
     87 static struct {
     88 	const char *name;
     89 	long offs;
     90 } zt[] = {
     91 	{ "Z",				0 },
     92 	{ "UT",				0 },
     93 	{ "UTC",			0 },
     94 	{ "GMT",			0 },
     95 	{ "EST",			-18000 },
     96 	{ "EDT",			-14400 },
     97 	{ "CST",			-21600 },
     98 	{ "CDT",			-18000 },
     99 	{ "MST",			-25200 },
    100 	{ "MDT",			-21600 },
    101 	{ "PST",			-28800 },
    102 	{ "PDT",			-25200 },
    103 
    104 	{ "VST",			-1 },
    105 	{ "VDT",			-1 },
    106 
    107 	{ "+03",			10800 },
    108 	{ "-03",			-10800 },
    109 	{ "+0403",			14580 },
    110 	{ "-0403",			-14580 },
    111 	{ "+04:03",			14580 },
    112 	{ "-04:03",			-14580 },
    113 	{ "+14:00",			50400 },
    114 	{ "-14:00",			-50400 },
    115 	{ "+23:59",			86340 },
    116 	{ "-23:59",			-86340 },
    117 
    118 	{ "1",				-1 },
    119 	{ "03",				-1 },
    120 	{ "0304",			-1 },
    121 	{ "+1",				-1 },
    122 	{ "-203",			-1 },
    123 	{ "+12345",			-1 },
    124 	{ "+12:345",			-1 },
    125 	{ "+123:45",			-1 },
    126 	{ "+2400",			-1 },
    127 	{ "-2400",			-1 },
    128 	{ "+1060",			-1 },
    129 	{ "-1060",			-1 },
    130 
    131 	{ "A",				3600 },
    132 	{ "B",				7200 },
    133 	{ "C",				10800 },
    134 	{ "D",				14400 },
    135 	{ "E",				18000 },
    136 	{ "F",				21600 },
    137 	{ "G",				25200 },
    138 	{ "H",				28800 },
    139 	{ "I",				32400 },
    140 	{ "L",				39600 },
    141 	{ "M",				43200 },
    142 	{ "N",				-3600 },
    143 	{ "O",				-7200 },
    144 	{ "P",				-10800 },
    145 	{ "Q",				-14400 },
    146 	{ "R",				-18000 },
    147 	{ "T",				-25200 },
    148 	{ "U",				-28800 },
    149 	{ "V",				-32400 },
    150 	{ "W",				-36000 },
    151 	{ "X",				-39600 },
    152 	{ "Y",				-43200 },
    153 
    154 	{ "J",				-2 },
    155 
    156 	{ "America/Los_Angeles",	-28800 },
    157 	{ "America/New_York",		-18000 },
    158 	{ "EST4EDT",			-14400 },
    159 
    160 	{ "Bogus",			-1 },
    161 };
    162 
    163 static void
    164 ztest1(const char *name, const char *fmt, long value)
    165 {
    166 	struct tm tm;
    167 	char *rv;
    168 
    169 	memset(&tm, 0, sizeof(tm));
    170 	if ((rv = strptime(name, fmt, &tm)) == NULL)
    171 		tm.tm_gmtoff = -1;
    172 	else if (rv == name && fmt[1] == 'Z')
    173 		value = 0;
    174 
    175 	switch (value) {
    176 	case -2:
    177 		value = -timezone;
    178 		break;
    179 	case -1:
    180 		if (fmt[1] == 'Z')
    181 			value = 0;
    182 		break;
    183 	default:
    184 		break;
    185 	}
    186 
    187 	ATF_CHECK_MSG(tm.tm_gmtoff == value,
    188 	    "strptime(\"%s\", \"%s\", &tm): "
    189 	    "expected: tm.tm_gmtoff=%ld, got: tm.tm_gmtoff=%ld",
    190 	    name, fmt, value, tm.tm_gmtoff);
    191 	printf("%s %s %ld\n", name, fmt, tm.tm_gmtoff);
    192 }
    193 
    194 static void
    195 ztest(const char *fmt)
    196 {
    197 	setenv("TZ", "US/Eastern", 1);
    198 	ztest1("GMT", fmt, 0);
    199 	ztest1("UTC", fmt, 0);
    200 	ztest1("US/Eastern", fmt, -18000);
    201 	for (size_t i = 0; i < __arraycount(zt); i++)
    202 		ztest1(zt[i].name, fmt, zt[i].offs);
    203 }
    204 
    205 ATF_TC(common);
    206 
    207 ATF_TC_HEAD(common, tc)
    208 {
    209 
    210 	atf_tc_set_md_var(tc, "descr", "Checks strptime(3): various checks");
    211 }
    212 
    213 ATF_TC_BODY(common, tc)
    214 {
    215 
    216 	h_pass("Tue Jan 20 23:27:46 1998", "%a %b %d %T %Y",
    217 		24, 46, 27, 23, 20, 0, 98, 2, 19);
    218 	h_pass("Tue Jan 20 23:27:46 1998", "%a %b %d %H:%M:%S %Y",
    219 		24, 46, 27, 23, 20, 0, 98, 2, 19);
    220 	h_pass("Tue Jan 20 23:27:46 1998", "%c",
    221 		24, 46, 27, 23, 20, 0, 98, 2, 19);
    222 	h_pass("Fri Mar  4 20:05:34 2005", "%a %b %e %H:%M:%S %Y",
    223 		24, 34, 5, 20, 4, 2, 105, 5, 62);
    224 	h_pass("5\t3  4 8pm:05:34 2005", "%w%n%m%t%d%n%k%p:%M:%S %Y",
    225 		21, 34, 5, 20, 4, 2, 105, 5, 62);
    226 	h_pass("Fri Mar  4 20:05:34 2005", "%c",
    227 		24, 34, 5, 20, 4, 2, 105, 5, 62);
    228 }
    229 
    230 ATF_TC(day);
    231 
    232 ATF_TC_HEAD(day, tc)
    233 {
    234 
    235 	atf_tc_set_md_var(tc, "descr",
    236 			  "Checks strptime(3) day name conversions [aA]");
    237 }
    238 
    239 ATF_TC_BODY(day, tc)
    240 {
    241 
    242 	h_pass("Sun", "%a", 3, -1, -1, -1, -1, -1, -1, 0, -1);
    243 	h_pass("Sunday", "%a", 6, -1, -1, -1, -1, -1, -1, 0, -1);
    244 	h_pass("Mon", "%a", 3, -1, -1, -1, -1, -1, -1, 1, -1);
    245 	h_pass("Monday", "%a", 6, -1, -1, -1, -1, -1, -1, 1, -1);
    246 	h_pass("Tue", "%a", 3, -1, -1, -1, -1, -1, -1, 2, -1);
    247 	h_pass("Tuesday", "%a", 7, -1, -1, -1, -1, -1, -1, 2, -1);
    248 	h_pass("Wed", "%a", 3, -1, -1, -1, -1, -1, -1, 3, -1);
    249 	h_pass("Wednesday", "%a", 9, -1, -1, -1, -1, -1, -1, 3, -1);
    250 	h_pass("Thu", "%a", 3, -1, -1, -1, -1, -1, -1, 4, -1);
    251 	h_pass("Thursday", "%a", 8, -1, -1, -1, -1, -1, -1, 4, -1);
    252 	h_pass("Fri", "%a", 3, -1, -1, -1, -1, -1, -1, 5, -1);
    253 	h_pass("Friday", "%a", 6, -1, -1, -1, -1, -1, -1, 5, -1);
    254 	h_pass("Sat", "%a", 3, -1, -1, -1, -1, -1, -1, 6, -1);
    255 	h_pass("Saturday", "%a", 8, -1, -1, -1, -1, -1, -1, 6, -1);
    256 	h_pass("Saturn", "%a", 3, -1, -1, -1, -1, -1, -1, 6, -1);
    257 	h_fail("Moon", "%a");
    258 	h_pass("Sun", "%A", 3, -1, -1, -1, -1, -1, -1, 0, -1);
    259 	h_pass("Sunday", "%A", 6, -1, -1, -1, -1, -1, -1, 0, -1);
    260 	h_pass("Mon", "%A", 3, -1, -1, -1, -1, -1, -1, 1, -1);
    261 	h_pass("Monday", "%A", 6, -1, -1, -1, -1, -1, -1, 1, -1);
    262 	h_pass("Tue", "%A", 3, -1, -1, -1, -1, -1, -1, 2, -1);
    263 	h_pass("Tuesday", "%A", 7, -1, -1, -1, -1, -1, -1, 2, -1);
    264 	h_pass("Wed", "%A", 3, -1, -1, -1, -1, -1, -1, 3, -1);
    265 	h_pass("Wednesday", "%A", 9, -1, -1, -1, -1, -1, -1, 3, -1);
    266 	h_pass("Thu", "%A", 3, -1, -1, -1, -1, -1, -1, 4, -1);
    267 	h_pass("Thursday", "%A", 8, -1, -1, -1, -1, -1, -1, 4, -1);
    268 	h_pass("Fri", "%A", 3, -1, -1, -1, -1, -1, -1, 5, -1);
    269 	h_pass("Friday", "%A", 6, -1, -1, -1, -1, -1, -1, 5, -1);
    270 	h_pass("Sat", "%A", 3, -1, -1, -1, -1, -1, -1, 6, -1);
    271 	h_pass("Saturday", "%A", 8, -1, -1, -1, -1, -1, -1, 6, -1);
    272 	h_pass("Saturn", "%A", 3, -1, -1, -1, -1, -1, -1, 6, -1);
    273 	h_fail("Moon", "%A");
    274 
    275 	h_pass("mon", "%a", 3, -1, -1, -1, -1, -1, -1, 1, -1);
    276 	h_pass("tueSDay", "%A", 7, -1, -1, -1, -1, -1, -1, 2, -1);
    277 	h_pass("sunday", "%A", 6, -1, -1, -1, -1, -1, -1, 0, -1);
    278 	h_fail("sunday", "%EA");
    279 	h_pass("SaturDay", "%A", 8, -1, -1, -1, -1, -1, -1, 6, -1);
    280 	h_fail("SaturDay", "%OA");
    281 }
    282 
    283 ATF_TC(hour);
    284 
    285 ATF_TC_HEAD(hour, tc)
    286 {
    287 
    288 	atf_tc_set_md_var(tc, "descr",
    289 			  "Checks strptime(3) hour conversions [IH]");
    290 }
    291 
    292 ATF_TC_BODY(hour, tc)
    293 {
    294 
    295 	h_fail("00", "%I");
    296 	h_fail("13", "%I");
    297 
    298 	h_pass("00", "%H", 2, -1, -1, 0, -1, -1, -1, -1, -1);
    299 	h_pass("12", "%H", 2, -1, -1, 12, -1, -1, -1, -1, -1);
    300 	h_pass("23", "%H", 2, -1, -1, 23, -1, -1, -1, -1, -1);
    301 	h_fail("24", "%H");
    302 }
    303 
    304 
    305 ATF_TC(month);
    306 
    307 ATF_TC_HEAD(month, tc)
    308 {
    309 
    310 	atf_tc_set_md_var(tc, "descr",
    311 			  "Checks strptime(3) month name conversions [bB]");
    312 }
    313 
    314 ATF_TC_BODY(month, tc)
    315 {
    316 
    317 	h_pass("Jan", "%b", 3, -1, -1, -1, -1, 0, -1, -1, -1);
    318 	h_pass("January", "%b", 7, -1, -1, -1, -1, 0, -1, -1, -1);
    319 	h_pass("Feb", "%b", 3, -1, -1, -1, -1, 1, -1, -1, -1);
    320 	h_pass("February", "%b", 8, -1, -1, -1, -1, 1, -1, -1, -1);
    321 	h_pass("Mar", "%b", 3, -1, -1, -1, -1, 2, -1, -1, -1);
    322 	h_pass("March", "%b", 5, -1, -1, -1, -1, 2, -1, -1, -1);
    323 	h_pass("Apr", "%b", 3, -1, -1, -1, -1, 3, -1, -1, -1);
    324 	h_pass("April", "%b", 5, -1, -1, -1, -1, 3, -1, -1, -1);
    325 	h_pass("May", "%b", 3, -1, -1, -1, -1, 4, -1, -1, -1);
    326 	h_pass("Jun", "%b", 3, -1, -1, -1, -1, 5, -1, -1, -1);
    327 	h_pass("June", "%b", 4, -1, -1, -1, -1, 5, -1, -1, -1);
    328 	h_pass("Jul", "%b", 3, -1, -1, -1, -1, 6, -1, -1, -1);
    329 	h_pass("July", "%b", 4, -1, -1, -1, -1, 6, -1, -1, -1);
    330 	h_pass("Aug", "%b", 3, -1, -1, -1, -1, 7, -1, -1, -1);
    331 	h_pass("August", "%b", 6, -1, -1, -1, -1, 7, -1, -1, -1);
    332 	h_pass("Sep", "%b", 3, -1, -1, -1, -1, 8, -1, -1, -1);
    333 	h_pass("September", "%b", 9, -1, -1, -1, -1, 8, -1, -1, -1);
    334 	h_pass("Oct", "%b", 3, -1, -1, -1, -1, 9, -1, -1, -1);
    335 	h_pass("October", "%b", 7, -1, -1, -1, -1, 9, -1, -1, -1);
    336 	h_pass("Nov", "%b", 3, -1, -1, -1, -1, 10, -1, -1, -1);
    337 	h_pass("November", "%b", 8, -1, -1, -1, -1, 10, -1, -1, -1);
    338 	h_pass("Dec", "%b", 3, -1, -1, -1, -1, 11, -1, -1, -1);
    339 	h_pass("December", "%b", 8, -1, -1, -1, -1, 11, -1, -1, -1);
    340 	h_pass("Mayor", "%b", 3, -1, -1, -1, -1, 4, -1, -1, -1);
    341 	h_pass("Mars", "%b", 3, -1, -1, -1, -1, 2, -1, -1, -1);
    342 	h_fail("Rover", "%b");
    343 	h_pass("Jan", "%B", 3, -1, -1, -1, -1, 0, -1, -1, -1);
    344 	h_pass("January", "%B", 7, -1, -1, -1, -1, 0, -1, -1, -1);
    345 	h_pass("Feb", "%B", 3, -1, -1, -1, -1, 1, -1, -1, -1);
    346 	h_pass("February", "%B", 8, -1, -1, -1, -1, 1, -1, -1, -1);
    347 	h_pass("Mar", "%B", 3, -1, -1, -1, -1, 2, -1, -1, -1);
    348 	h_pass("March", "%B", 5, -1, -1, -1, -1, 2, -1, -1, -1);
    349 	h_pass("Apr", "%B", 3, -1, -1, -1, -1, 3, -1, -1, -1);
    350 	h_pass("April", "%B", 5, -1, -1, -1, -1, 3, -1, -1, -1);
    351 	h_pass("May", "%B", 3, -1, -1, -1, -1, 4, -1, -1, -1);
    352 	h_pass("Jun", "%B", 3, -1, -1, -1, -1, 5, -1, -1, -1);
    353 	h_pass("June", "%B", 4, -1, -1, -1, -1, 5, -1, -1, -1);
    354 	h_pass("Jul", "%B", 3, -1, -1, -1, -1, 6, -1, -1, -1);
    355 	h_pass("July", "%B", 4, -1, -1, -1, -1, 6, -1, -1, -1);
    356 	h_pass("Aug", "%B", 3, -1, -1, -1, -1, 7, -1, -1, -1);
    357 	h_pass("August", "%B", 6, -1, -1, -1, -1, 7, -1, -1, -1);
    358 	h_pass("Sep", "%B", 3, -1, -1, -1, -1, 8, -1, -1, -1);
    359 	h_pass("September", "%B", 9, -1, -1, -1, -1, 8, -1, -1, -1);
    360 	h_pass("Oct", "%B", 3, -1, -1, -1, -1, 9, -1, -1, -1);
    361 	h_pass("October", "%B", 7, -1, -1, -1, -1, 9, -1, -1, -1);
    362 	h_pass("Nov", "%B", 3, -1, -1, -1, -1, 10, -1, -1, -1);
    363 	h_pass("November", "%B", 8, -1, -1, -1, -1, 10, -1, -1, -1);
    364 	h_pass("Dec", "%B", 3, -1, -1, -1, -1, 11, -1, -1, -1);
    365 	h_pass("December", "%B", 8, -1, -1, -1, -1, 11, -1, -1, -1);
    366 	h_pass("Mayor", "%B", 3, -1, -1, -1, -1, 4, -1, -1, -1);
    367 	h_pass("Mars", "%B", 3, -1, -1, -1, -1, 2, -1, -1, -1);
    368 	h_fail("Rover", "%B");
    369 
    370 	h_pass("september", "%b", 9, -1, -1, -1, -1, 8, -1, -1, -1);
    371 	h_pass("septembe", "%B", 3, -1, -1, -1, -1, 8, -1, -1, -1);
    372 }
    373 
    374 ATF_TC(seconds);
    375 
    376 ATF_TC_HEAD(seconds, tc)
    377 {
    378 
    379 	atf_tc_set_md_var(tc, "descr",
    380 			  "Checks strptime(3) seconds conversions [S]");
    381 }
    382 
    383 ATF_TC_BODY(seconds, tc)
    384 {
    385 
    386 	h_pass("0", "%S", 1, 0, -1, -1, -1, -1, -1, -1, -1);
    387 	h_pass("59", "%S", 2, 59, -1, -1, -1, -1, -1, -1, -1);
    388 	h_pass("60", "%S", 2, 60, -1, -1, -1, -1, -1, -1, -1);
    389 	h_pass("61", "%S", 2, 61, -1, -1, -1, -1, -1, -1, -1);
    390 	h_fail("62", "%S");
    391 }
    392 
    393 ATF_TC(year);
    394 
    395 ATF_TC_HEAD(year, tc)
    396 {
    397 
    398 	atf_tc_set_md_var(tc, "descr",
    399 			  "Checks strptime(3) century/year conversions [CyY]");
    400 }
    401 
    402 ATF_TC_BODY(year, tc)
    403 {
    404 
    405 	h_pass("x20y", "x%Cy", 4, -1, -1, -1, -1, -1, 100, -1, -1);
    406 	h_pass("x84y", "x%yy", 4, -1, -1, -1, -1, -1, 84, -1, -1);
    407 	h_pass("x2084y", "x%C%yy", 6, -1, -1, -1, -1, -1, 184, -1, -1);
    408 	h_pass("x8420y", "x%y%Cy", 6, -1, -1, -1, -1, -1, 184, -1, -1);
    409 	h_pass("%20845", "%%%C%y5", 6, -1, -1, -1, -1, -1, 184, -1, -1);
    410 	h_fail("%", "%E%");
    411 
    412 	h_pass("1980", "%Y", 4, -1, -1, -1, -1, -1, 80, -1, -1);
    413 	h_pass("1980", "%EY", 4, -1, -1, -1, -1, -1, 80, -1, -1);
    414 }
    415 
    416 ATF_TC(zone);
    417 
    418 ATF_TC_HEAD(zone, tc)
    419 {
    420 
    421 	atf_tc_set_md_var(tc, "descr",
    422 			  "Checks strptime(3) timezone conversion [z]");
    423 }
    424 
    425 
    426 ATF_TC_BODY(zone, tc)
    427 {
    428 	ztest("%z");
    429 }
    430 
    431 ATF_TC(Zone);
    432 
    433 ATF_TC_HEAD(Zone, tc)
    434 {
    435 
    436 	atf_tc_set_md_var(tc, "descr",
    437 			  "Checks strptime(3) timezone conversion [Z]");
    438 }
    439 
    440 
    441 ATF_TC_BODY(Zone, tc)
    442 {
    443 	ztest("%Z");
    444 }
    445 
    446 ATF_TC(posixtime_overflow);
    447 
    448 ATF_TC_HEAD(posixtime_overflow, tc)
    449 {
    450 
    451 	atf_tc_set_md_var(tc, "descr",
    452 	    "Checks strptime(3) safely rejects POSIX time overflow");
    453 }
    454 
    455 ATF_TC_BODY(posixtime_overflow, tc)
    456 {
    457 	static const uint64_t P[] = { /* cases that should pass round-trip */
    458 		[0] = 0,
    459 		[1] = 1,
    460 		[2] = 2,
    461 		[3] = 0x7ffffffe,
    462 		[4] = 0x7fffffff,
    463 		[5] = 0x80000000,
    464 		[6] = 0x80000001,
    465 		[7] = 0xfffffffe,
    466 		[8] = 0xffffffff,
    467 		[9] = 0x100000000,
    468 		[10] = 0x100000001,
    469 		[11] = 67767976233532799, /* 2147483647-12-31T23:59:59 */
    470 		/*
    471 		 * Beyond this point, the year (.tm_year + 1900)
    472 		 * overflows the signed 32-bit range, so we won't be
    473 		 * able to test round-trips:
    474 		 */
    475 		[12] = 67767976233532800,
    476 		[13] = 67767976233532801,
    477 		[14] = 67768036191676799,
    478 		/*
    479 		 * Beyond this point, .tm_year itself overflows the
    480 		 * signed 32-bit range, so strptime won't work at all;
    481 		 * the output can't be represented in struct tm.
    482 		 */
    483 #if 0
    484 		[15] = 67768036191676800,
    485 		[16] = 67768036191676801,
    486 		[17] = 0x7ffffffffffffffe,
    487 		[18] = 0x7fffffffffffffff,
    488 #endif
    489 	};
    490 	static const uint64_t F[] = { /* cases strptime should reject */
    491 		[0] = 67768036191676800,
    492 		[1] = 67768036191676801,
    493 		[2] = 0x7ffffffffffffffe,
    494 		[3] = 0x7fffffffffffffff,
    495 		[4] = 0x8000000000000000,
    496 		[5] = 0x8000000000000001,
    497 		[6] = 0xfffffffffffffffe,
    498 		[7] = 0xffffffffffffffff,
    499 	};
    500 	size_t i;
    501 
    502 	/*
    503 	 * Verify time_t fits in uint64_t, with space to spare since
    504 	 * it's signed.
    505 	 */
    506 	__CTASSERT(__type_max(time_t) < __type_max(uint64_t));
    507 
    508 	/*
    509 	 * Make sure we work in UTC so this test doesn't depend on
    510 	 * which time zone your machine is configured for.
    511 	 */
    512 	setenv("TZ", "UTC", 1);
    513 
    514 	/*
    515 	 * Check the should-pass cases.
    516 	 */
    517 	for (i = 0; i < __arraycount(P); i++) {
    518 		char buf[sizeof("18446744073709551616")];
    519 		int n;
    520 		struct tm tm;
    521 		time_t t;
    522 		int error;
    523 
    524 		/*
    525 		 * Format the integer in decimal.
    526 		 */
    527 		n = snprintf(buf, sizeof(buf), "%"PRIu64, P[i]);
    528 		ATF_CHECK_MSG(n >= 0 && (unsigned)n < sizeof(buf),
    529 		    "P[%zu]: 64-bit requires %d digits", i, n);
    530 
    531 		/*
    532 		 * Parse the time into components.
    533 		 */
    534 		fprintf(stderr, "# P[%zu]: %"PRId64"\n", i, P[i]);
    535 		if (strptime(buf, "%s", &tm) == NULL) {
    536 			atf_tc_fail_nonfatal("P[%zu]: strptime failed", i);
    537 			continue;
    538 		}
    539 		fprintf(stderr, "tm_sec=%d\n", tm.tm_sec);
    540 		fprintf(stderr, "tm_min=%d\n", tm.tm_min);
    541 		fprintf(stderr, "tm_hour=%d\n", tm.tm_hour);
    542 		fprintf(stderr, "tm_mday=%d\n", tm.tm_mday);
    543 		fprintf(stderr, "tm_mon=%d\n", tm.tm_mon);
    544 		fprintf(stderr, "tm_year=%d\n", tm.tm_year);
    545 		fprintf(stderr, "tm_wday=%d\n", tm.tm_wday);
    546 		fprintf(stderr, "tm_yday=%d\n", tm.tm_yday);
    547 		fprintf(stderr, "tm_isdst=%d\n", tm.tm_isdst);
    548 		fprintf(stderr, "tm_gmtoff=%ld\n", tm.tm_gmtoff);
    549 		fprintf(stderr, "tm_zone=%s\n", tm.tm_zone);
    550 
    551 		/*
    552 		 * Convert back to POSIX seconds since epoch -- unless
    553 		 * the year number overflows signed 32-bit, in which
    554 		 * case stop here because we can't test further.
    555 		 */
    556 		if (tm.tm_year > 0x7fffffff - 1900)
    557 			continue;
    558 		t = mktime(&tm);
    559 		error = errno;
    560 		ATF_CHECK_MSG(t != -1, "P[%zu]: mktime failed: %d, %s",
    561 		    i, error, strerror(error));
    562 
    563 		/*
    564 		 * Verify the round-trip.
    565 		 */
    566 		ATF_CHECK_EQ_MSG(P[i], (uint64_t)t,
    567 		    "P[%zu]: %"PRId64" -> %"PRId64, i, P[i], (int64_t)t);
    568 	}
    569 
    570 	/*
    571 	 * Check the should-fail cases.
    572 	 */
    573 	for (i = 0; i < __arraycount(F); i++) {
    574 		char buf[sizeof("18446744073709551616")];
    575 		int n;
    576 
    577 		/*
    578 		 * Format the integer in decimal.
    579 		 */
    580 		n = snprintf(buf, sizeof(buf), "%"PRIu64, F[i]);
    581 		ATF_CHECK_MSG(n >= 0 && (unsigned)n < sizeof(buf),
    582 		    "F[%zu]: 64-bit requires %d digits", i, n);
    583 
    584 		/*
    585 		 * Verify strptime rejects this.
    586 		 */
    587 		h_fail(buf, "%s");
    588 	}
    589 }
    590 
    591 ATF_TP_ADD_TCS(tp)
    592 {
    593 
    594 	ATF_TP_ADD_TC(tp, common);
    595 	ATF_TP_ADD_TC(tp, day);
    596 	ATF_TP_ADD_TC(tp, hour);
    597 	ATF_TP_ADD_TC(tp, month);
    598 	ATF_TP_ADD_TC(tp, seconds);
    599 	ATF_TP_ADD_TC(tp, year);
    600 	ATF_TP_ADD_TC(tp, zone);
    601 	ATF_TP_ADD_TC(tp, Zone);
    602 	ATF_TP_ADD_TC(tp, posixtime_overflow);
    603 
    604 	return atf_no_error();
    605 }
    606