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libc: common: implement multiple time functions

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Implemented the following:
- `asctime_r()`
- `asctime()`
- `localtime()`
- `localtime_r()`
- `ctime()`
- `ctime_r()`

Specifically:
- the implementation of `localtime()` & `localtime_r()` simply
  wraps around the gmtime() & gmtime_r() functions, the
  results are always expressed as UTC.
- `ctime()` is equivalent to `asctime(localtime(clock))`, it
  inherits the limitation of `localtime()` as well, which only
  supports UTC results currently.

Added tests for these newly implemented functions.

Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Signed-off-by: Yong Cong Sin <yongcong.sin@gmail.com>
This commit is contained in:
Yong Cong Sin 2024-08-15 14:49:32 +08:00 • committed by Anas Nashif
commit fe94d4354a
13 changed files with 256 additions and 5 deletions
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83
tests/lib/c_lib/common/src/main.c
View file

@ -22,6 +22,7 @@
#include <zephyr/kernel.h>
#include <zephyr/sys/__assert.h>
#include <zephyr/sys/util.h>
#include <zephyr/ztest.h>
#include <limits.h>
@ -1075,7 +1076,7 @@ ZTEST(libc_common, test_strtok_r)
*
* @see gmtime(),gmtime_r().
*/
ZTEST(libc_common, test_time)
ZTEST(libc_common, test_time_gmtime)
{
time_t tests1 = 0;
time_t tests2 = -5;
@ -1092,6 +1093,86 @@ ZTEST(libc_common, test_time)
zassert_not_null(gmtime_r(&tests4, &tp), "gmtime_r failed");
}
/**
* @brief Test time function
*
* @see asctime(), asctime_r().
*/
ZTEST(libc_common, test_time_asctime)
{
char buf[26] = {0};
struct tm tp = {
.tm_sec = 10, /* Seconds */
.tm_min = 30, /* Minutes */
.tm_hour = 14, /* Hour (24-hour format) */
.tm_wday = 5, /* Day of the week (0-6, 0 = Sun) */
.tm_mday = 1, /* Day of the month */
.tm_mon = 5, /* Month (0-11, January = 0) */
.tm_year = 124, /* Year (current year - 1900) */
};
zassert_not_null(asctime_r(&tp, buf));
zassert_equal(strncmp("Fri Jun 1 14:30:10 2024\n", buf, sizeof(buf)), 0);
zassert_not_null(asctime(&tp));
zassert_equal(strncmp("Fri Jun 1 14:30:10 2024\n", asctime(&tp), sizeof(buf)), 0);
if (IS_ENABLED(CONFIG_COMMON_LIBC_ASCTIME_R)) {
zassert_is_null(asctime_r(NULL, buf));
zassert_is_null(asctime(NULL));
zassert_is_null(asctime_r(&tp, NULL));
tp.tm_wday = 8;
zassert_is_null(asctime_r(&tp, buf));
zassert_is_null(asctime(&tp));
tp.tm_wday = 5;
tp.tm_mon = 12;
zassert_is_null(asctime_r(&tp, buf));
zassert_is_null(asctime(&tp));
}
}
/**
* @brief Test time function
*
* @see localtime(), localtime_r().
*/
ZTEST(libc_common, test_time_localtime)
{
time_t tests1 = 0;
time_t tests2 = -5;
time_t tests3 = (time_t) -214748364800;
time_t tests4 = 951868800;
struct tm tp;
zassert_not_null(localtime(&tests1), "localtime failed");
zassert_not_null(localtime(&tests2), "localtime failed");
tp.tm_wday = -5;
zassert_not_null(localtime_r(&tests3, &tp), "localtime_r failed");
zassert_not_null(localtime_r(&tests4, &tp), "localtime_r failed");
}
/**
* @brief Test time function
*
* @see ctime(), ctime_r().
*/
ZTEST(libc_common, test_time_ctime)
{
char buf[26] = {0};
time_t test1 = 1718260000;
zassert_not_null(ctime_r(&test1, buf));
zassert_equal(strncmp("Thu Jun 13 06:26:40 2024\n", buf, sizeof(buf)), 0);
zassert_not_null(ctime(&test1));
zassert_equal(strncmp("Thu Jun 13 06:26:40 2024\n", ctime(&test1), sizeof(buf)), 0);
}
/**
*
* @brief Test rand function

2
tests/lib/c_lib/common/testcase.yaml
View file

@ -13,6 +13,8 @@ tests:
- CONFIG_MINIMAL_LIBC=y
- CONFIG_MINIMAL_LIBC_NON_REENTRANT_FUNCTIONS=y
- CONFIG_MINIMAL_LIBC_RAND=y
- CONFIG_COMMON_LIBC_ASCTIME_R=y
- CONFIG_COMMON_LIBC_CTIME_R=y
libraries.libc.common.newlib:
filter: CONFIG_NEWLIB_LIBC_SUPPORTED
min_ram: 32