Factor out parse_datetime()

Create a new function that takes a time stamp and updates the date or
time components of that time stamp according to a given date/time
string. Use that function for updating the start time of an item.

Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>

3 files changed, 45 insertions, 25 deletions

diff --git a/src/calcurse.h b/src/calcurse.h
index c8f7bb9..3810db2 100644
--- a/src/calcurse.h
+++ b/src/calcurse.h
@@ -1136,6 +1136,7 @@ int check_time(unsigned, unsigned);
 int parse_time(const char *, unsigned *, unsigned *);
 int parse_duration(const char *, unsigned *);
 int parse_date_duration(const char *, unsigned *);
+int parse_datetime(const char *, long *);
 void file_close(FILE *, const char *);
 void psleep(unsigned);
 int fork_exec(int *, int *, const char *, const char *const *);
diff --git a/src/ui-day.c b/src/ui-day.c
index b651ca5..0c31b3c 100644
--- a/src/ui-day.c
+++ b/src/ui-day.c
@@ -67,36 +67,16 @@ static int day_edit_time(int time)
 	const char *enter_str = _("Press [Enter] to continue");
 	const char *fmt_msg =
 	    _("You entered an invalid time, should be [hh:mm] or [hhmm]");
-	unsigned int hour, minute;
-	int year, month, day;
-	struct date new_date;
+	long ts = time;
 
 	for (;;) {
 		status_mesg(msg_time, "");
 		if (updatestring(win[STA].p, &input, 0, 1) != GETSTRING_VALID)
 			return 0;
-		char *inputcpy = mem_strdup(input);
-		char *p = strtok(inputcpy, " ");
-		while (p) {
-			if (parse_date(p, conf.input_datefmt, &year, &month,
-				       &day, ui_calendar_get_slctd_day())) {
-				new_date.dd = day;
-				new_date.mm = month;
-				new_date.yyyy = year;
-				time = date2sec(new_date, 0, 0) +
-				       get_item_time(time);
-			} else if (parse_time(p, &hour, &minute) == 1) {
-				time = update_time_in_date(time, hour, minute);
-			} else {
-				status_mesg(fmt_msg, enter_str);
-				wgetch(win[KEY].p);
-				break;
-			}
-			p = strtok(NULL, " ");
-		}
-		mem_free(inputcpy);
-		if (!p)
-			return time;
+		if (parse_datetime(input, &ts))
+			return ts;
+		status_mesg(fmt_msg, enter_str);
+		wgetch(win[KEY].p);
 	}
 }
 
diff --git a/src/utils.c b/src/utils.c
index 14683fc..335f325 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1103,6 +1103,45 @@ int parse_duration(const char *string, unsigned *duration)
 	return 1;
 }
 
+/*
+ * Converts a string containing a date or a time into a time stamp.
+ *
+ * Takes a date/time string and a time stamp. If the string only contains a
+ * date, the date of the time stamp is updated while the time remains
+ * untouched. If the string only contains a time, the time of the time stamp is
+ * updated and the date remains the same. If the string contains both a date
+ * and a time, the time stamp is updated to match the given string.
+ *
+ * Returns 1 on success and 0 on failure.
+ */
+int parse_datetime(const char *string, long *ts)
+{
+	char *t = mem_strdup(string);
+	char *p = strtok(t, " ");
+
+	unsigned int hour, minute;
+	int year, month, day;
+	struct date new_date;
+
+	while (p) {
+		if (parse_date(p, conf.input_datefmt, &year, &month, &day,
+			       ui_calendar_get_slctd_day())) {
+			new_date.dd = day;
+			new_date.mm = month;
+			new_date.yyyy = year;
+			*ts = date2sec(new_date, 0, 0) + get_item_time(*ts);
+		} else if (parse_time(p, &hour, &minute) == 1) {
+			*ts = update_time_in_date(*ts, hour, minute);
+		} else {
+			return 0;
+		}
+		p = strtok(NULL, " ");
+	}
+
+	mem_free(t);
+	return 1;
+}
+
 void file_close(FILE * f, const char *pos)
 {
 	EXIT_IF((fclose(f)) != 0, _("Error when closing file at %s"), pos);