Created
May 2, 2018 02:55
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#include <stdio.h> | |
#include <string.h> | |
#include <time.h> | |
int parse(const char* timestamp_as_string) { | |
struct tm struct_tm; | |
time_t t; | |
memset(&struct_tm, 0, sizeof(struct tm)); | |
if (strptime(timestamp_as_string, "%m/%d/%Y %H:%M", &struct_tm)) { | |
printf("strptime() returned `%d/%02d/%02d %02d:%02d:%02d; is_dst = %d`, ", | |
struct_tm.tm_year + 1900, | |
struct_tm.tm_mon, | |
struct_tm.tm_mday, | |
struct_tm.tm_hour, | |
struct_tm.tm_min, | |
struct_tm.tm_sec, | |
struct_tm.tm_isdst); | |
struct_tm.tm_isdst = -1; | |
t = mktime(&struct_tm); | |
printf("mktime() returned `%d`.\n", (int)t); | |
return (int)t; | |
} else { | |
fprintf(stderr, "Failed to parse date: `%s`.\n", timestamp_as_string); | |
return 0; | |
} | |
} | |
int main() { | |
const char* timestamp_of_interest = "11/06/2016 01:00"; | |
const char* previous_call_one = "11/06/2016 0:00"; | |
const char* previous_call_two = "11/06/2016 2:00"; | |
int t1; | |
int t2; | |
parse(previous_call_one); | |
t1 = parse(timestamp_of_interest); | |
parse(previous_call_two); | |
t2 = parse(timestamp_of_interest); | |
if (t1 == t2) { | |
printf("OK\n"); | |
} else { | |
printf("`%s` : %d != %d\n", timestamp_of_interest, t1, t2); | |
} | |
} |
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