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#include <time.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void test(int result, const char* comment, const char* parsed = "") {
printf("%d", result);
if (!result) {
printf("\nERROR: %s (\"%s\")\n", comment, parsed);
}
}
int cmp(const char* s1, const char* s2) {
for (; *s1 == *s2; s1++, s2++) {
if (*s1 == '\0') break;
}
return (*s1 - *s2);
}
int main() {
struct tm tm;
char s[1000];
size_t size;
tm.tm_sec = 4;
tm.tm_min = 23;
tm.tm_hour = 20;
tm.tm_mday = 21;
tm.tm_mon = 1;
tm.tm_year = 74;
tm.tm_wday = 4;
tm.tm_yday = 51;
tm.tm_isdst = 0;
size = strftime(s, 1000, "", &tm);
test((size == 0) && (*s == '\0'), "strftime test #1", s);
size = strftime(s, 1000, "%a", &tm);
test((size == 3) && !cmp(s, "Thu"), "strftime test #2", s);
size = strftime(s, 1000, "%A", &tm);
test((size == 8) && !cmp(s, "Thursday"), "strftime test #3", s);
size = strftime(s, 1000, "%b", &tm);
test((size == 3) && !cmp(s, "Feb"), "strftime test #4", s);
size = strftime(s, 1000, "%B", &tm);
test((size == 8) && !cmp(s, "February"), "strftime test #5", s);
size = strftime(s, 1000, "%d", &tm);
test((size == 2) && !cmp(s, "21"), "strftime test #6", s);
size = strftime(s, 1000, "%H", &tm);
test((size == 2) && !cmp(s, "20"), "strftime test #7", s);
size = strftime(s, 1000, "%I", &tm);
test((size == 2) && !cmp(s, "08"), "strftime test #8", s);
size = strftime(s, 1000, "%j", &tm);
test((size == 3) && !cmp(s, "052"), "strftime test #9", s);
size = strftime(s, 1000, "%m", &tm);
test((size == 2) && !cmp(s, "02"), "strftime test #10", s);
size = strftime(s, 1000, "%M", &tm);
test((size == 2) && !cmp(s, "23"), "strftime test #11", s);
size = strftime(s, 1000, "%p", &tm);
test((size == 2) && !cmp(s, "PM"), "strftime test #12", s);
size = strftime(s, 1000, "%S", &tm);
test((size == 2) && !cmp(s, "04"), "strftime test #13", s);
size = strftime(s, 1000, "%U", &tm);
test((size == 2) && !cmp(s, "07"), "strftime test #14", s);
size = strftime(s, 1000, "%w", &tm);
test((size == 1) && !cmp(s, "4"), "strftime test #15", s);
size = strftime(s, 1000, "%W", &tm);
test((size == 2) && !cmp(s, "07"), "strftime test #16", s);
size = strftime(s, 1000, "%y", &tm);
test((size == 2) && !cmp(s, "74"), "strftime test #17", s);
size = strftime(s, 1000, "%Y", &tm);
test((size == 4) && !cmp(s, "1974"), "strftime test #18", s);
size = strftime(s, 1000, "%%", &tm);
test((size == 1) && !cmp(s, "%"), "strftime test #19", s);
size = strftime(s, 5, "%Y", &tm);
test((size == 4) && !cmp(s, "1974"), "strftime test #20", s);
size = strftime(s, 4, "%Y", &tm);
test((size == 0), "strftime test #21", s);
tm.tm_mon = 0;
tm.tm_mday = 1;
size = strftime(s, 10, "%U", &tm);
test((size == 2) && !cmp(s, "00"), "strftime test #22", s);
size = strftime(s, 10, "%W", &tm);
test((size == 2) && !cmp(s, "00"), "strftime test #23", s);
// 1/1/1973 was a Sunday and is in CW 1
tm.tm_year = 73;
size = strftime(s, 10, "%W", &tm);
test((size == 2) && !cmp(s, "01"), "strftime test #24", s);
// 1/1/1978 was a Monday and is in CW 1
tm.tm_year = 78;
size = strftime(s, 10, "%U", &tm);
test((size == 2) && !cmp(s, "01"), "strftime test #25", s);
// 2/1/1999
tm.tm_year = 99;
tm.tm_yday = 1;
size = strftime(s, 10, "%G (%V)", &tm);
test((size == 9) && !cmp(s, "1998 (53)"), "strftime test #26", s);
size = strftime(s, 10, "%g", &tm);
test((size == 2) && !cmp(s, "98"), "strftime test #27", s);
// 30/12/1997
tm.tm_year = 97;
tm.tm_yday = 363;
size = strftime(s, 10, "%G (%V)", &tm);
test((size == 9) && !cmp(s, "1998 (01)"), "strftime test #28", s);
size = strftime(s, 10, "%g", &tm);
test((size == 2) && !cmp(s, "98"), "strftime test #29", s);
}
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