commit 3291c4316f40314830fbabffe6abea0944b77861
parent 778fcd3c0b4fdd3f996dac0ac63be7e4644669af
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date: Tue, 28 Apr 2026 09:15:11 +0200
tests/libc: Add 0075-strftime
Co-authored-by: Co-authored-by: Hiltjo Posthuma <hiltjo@codemadness.org>
Diffstat:
3 files changed, 126 insertions(+), 0 deletions(-)
diff --git a/tests/libc/execute/.gitignore b/tests/libc/execute/.gitignore
@@ -73,3 +73,4 @@ test.log
0072-mktime
0073-mktime
0074-strftime
+0075-strftime
diff --git a/tests/libc/execute/0075-strftime.c b/tests/libc/execute/0075-strftime.c
@@ -0,0 +1,124 @@
+/*
+output:
+testing
+done
+end:
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+static struct tm *tm;
+static time_t t;
+static char buf[256];
+
+void
+testval(const char *fmt, size_t siz, size_t expect)
+{
+ size_t r;
+
+ r = strftime(buf, siz, fmt, tm);
+ if (r != expect) {
+ printf("test failed, fmt=%s, siz=%zu, result=%zu, expected=%zu\n",
+ fmt, siz, r, expect);
+ exit(1);
+ }
+}
+
+int
+main(void)
+{
+ puts("testing");
+ t = time(NULL);
+ if (t == (time_t)-1)
+ return 1;
+
+ tm = gmtime(&t);
+ if (tm == NULL)
+ return 1;
+
+ /* "GMT" */
+ testval("%Z", sizeof(buf), 3);
+ testval("%Z", 4, 3); /* fit exactly */
+ testval("%Z", 3, 0); /* too small */
+ testval("%Z", 2, 0); /* too small */
+
+ testval("%Y", sizeof(buf), 4);
+ testval("%Y", 5, 4); /* fit exactly */
+ testval("%Y", 4, 0); /* too small */
+ testval("%Y", 2, 0); /* too small */
+
+ testval("%G", sizeof(buf), 4);
+ testval("%G", 5, 4); /* fit exactly */
+ testval("%G", 4, 0); /* too small */
+ testval("%G", 2, 0); /* too small */
+
+ testval("%%", sizeof(buf), 1);
+ testval("%%", 2, 1); /* fit exactly */
+ testval("%%", 1, 0); /* too small */
+ testval("%%", 0, 0); /* too small */
+
+ testval("%d", sizeof(buf), tm->tm_mday > 10 ? 2 : 1);
+ testval("%d", tm->tm_mday > 10 ? 3 : 2, tm->tm_mday > 10 ? 2 : 1); /* fit exactly */
+ testval("%d", tm->tm_mday > 10 ? 2 : 1, 0); /* too small */
+ testval("%d", 0, 0); /* too small */
+
+ testval("abc", sizeof(buf), 3);
+ testval("abc", 4, 3); /* fit exactly */
+ testval("abc", 3, 0); /* too small */
+ testval("abc", 0, 0); /* too small */
+
+ testval("%t", sizeof(buf), 1);
+ testval("%t", 2, 1); /* fit exactly */
+ testval("%t", 1, 0); /* too small */
+ testval("%t", 0, 0); /* too small */
+
+ /* "AM" or "PM" */
+ testval("%p", sizeof(buf), 2);
+ testval("%p", 3, 2); /* fit exactly */
+ testval("%p", 2, 0); /* too small */
+ testval("%p", 0, 0); /* too small */
+
+ testval("", sizeof(buf), 0);
+ testval("", 1, 0); /* fit exactly */
+ testval("", 0, 0); /* too small */
+
+ /* weekday */
+ testval("%w", sizeof(buf), 1);
+ testval("%w", 2, 1); /* fit exactly */
+ testval("%w", 1, 0); /* too small */
+ testval("%w", 0, 0); /* too small */
+
+ /* same as "%Y-%m-%d", recursive */
+ testval("%F", sizeof(buf), 10);
+ testval("%F", 11, 10); /* fit exactly */
+ testval("%F", 10, 0); /* too small */
+ testval("%F", 0, 0); /* too small */
+
+ /* week number of the year, monday of first year, padded with '0', 0-53 */
+ tm->tm_yday = 1;
+ testval("%W", sizeof(buf), 2);
+ testval("%W", 3, 2); /* fit exactly */
+ testval("%W", 2, 0); /* too small */
+ testval("%W", 0, 0); /* too small */
+
+ /* week number of the year, padded with '0' */
+ tm->tm_yday = 1; /* 1 */
+ tm->tm_mon = 0; /* january */
+ tm->tm_year = 122; /* 2022 */
+ tm->tm_wday = 6; /* saturday */
+ testval("%V", sizeof(buf), 2);
+ testval("%V", 3, 2); /* fit exactly */
+ testval("%V", 2, 0); /* too small */
+ testval("%V", 0, 0); /* too small */
+
+ tm->tm_wday = 10;
+ testval("%w", sizeof(buf), 1);
+ testval("%w", 2, 1); /* fit exactly */
+ testval("%w", 1, 0); /* too small */
+ testval("%w", 0, 0); /* too small */
+ puts("done");
+
+ return 0;
+}
diff --git a/tests/libc/execute/libc-tests.lst b/tests/libc/execute/libc-tests.lst
@@ -71,3 +71,4 @@
0072-mktime
0073-mktime
0074-strftime
+0075-strftime
