1 files changed, 70 insertions, 0 deletions
diff --git a/c_implementation/src/ak_datetime.c b/c_implementation/src/ak_datetime.c
new file mode 100644
index 0000000..71dcb18
--- /dev/null
+++ b/c_implementation/src/ak_datetime.c
@@ -0,0 +1,70 @@
+#include <libakdatetime.h>
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+#include <stdbool.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+// Returns Unix timestamp (seconds since epoch)
+long ak_datetime_unix() {
+	return time(NULL);
+}
+
+// Returns Unix timestamp with nanoseconds
+void ak_datetime_unix_nanosecs(char *buffer, size_t size) {
+	struct timespec ts;
+	clock_gettime(CLOCK_REALTIME, &ts);
+	snprintf(buffer, size, "%ld.%09ld", ts.tv_sec, ts.tv_nsec);
+}
+
+// Returns human-readable datetime in format YYYYMMDD_HHMMSS
+void ak_datetime_human(char *buffer, size_t size) {
+	time_t now = time(NULL);
+	const struct tm *tm = gmtime(&now);
+	strftime(buffer, size, "%Y%m%d_%H%M%S", tm);
+}
+
+// Returns human-readable date in format YYYYMMDD
+void ak_datetime_human_date_only(char *buffer, size_t size) {
+	time_t now = time(NULL);
+	const struct tm *tm = gmtime(&now);
+	strftime(buffer, size, "%Y%m%d", tm);
+}
+
+// Returns yesterday's date in format YYYYMMDD
+void ak_datetime_human_date_only_yesterday(char *buffer, size_t size) {
+	time_t now = time(NULL);
+	now -= 24 * 60 * 60; // Subtract one day
+	const struct tm *tm = gmtime(&now);
+	strftime(buffer, size, "%Y%m%d", tm);
+}
+
+// Checks if string contains only digits
+static bool is_digits_only(const char *str) {
+	while (*str) {
+		if (!isdigit(*str)) {
+			return false;
+		}
+		str++;
+	}
+	return true;
+}
+
+// Converts Unix timestamp to human-readable format YYYYMMDD_HHMMSS
+bool ak_datetime_unix_to_human(const char *timestamp_str, char *buffer, size_t size) {
+	// Check if input is valid (10-digit number)
+	if (timestamp_str == NULL || strlen(timestamp_str) != 10 || !is_digits_only(timestamp_str)) {
+		return false;
+	}
+
+	time_t timestamp = (time_t)atol(timestamp_str);
+	const struct tm *tm = gmtime(&timestamp);
+	if (tm == NULL) {
+		return false;
+	}
+
+	strftime(buffer, size, "%Y%m%d_%H%M%S", tm);
+	return true;
+}
+