Clean up and remove references to 86401 notation.

src/libiso8601/calc.c

@@ -11,9 +11,8 @@
  *
  *  This file contains calculation routines used internally in the library. Our date format is the
  *  number of days elapsed since 0000-001 (so that date would be 0, -0001-365 would be -1, etc.).
- *  Time is represented as the number of seconds elapsed since midnight at the start of the day
- *  (so 0 is 00:00:00 and 86400 is 24:00:00, which we take to be infinitesimally before the start
- *  of the next day).
+ *  Time is represented as the number of seconds elapsed since midnight at the start of the day. It
+ *  is a value between 0 and 86399 (or 86400 for leap seconds).
  */
 
 #define DAYS_IN_400_YEARS (146097)
@@ -373,19 +372,12 @@ void iso8601_to_clocktime(int* hour, int* min, int* sec, const struct iso8601_da
 {
     div_t qr;
 
-    // two special cases: leap second and midnight
-    switch(date->sec) {
-    case 86400:
+    // special case: leap second
+    if(date->sec == 86400) {
         *hour = 23;
         *min = 59;
         *sec = 60;
         return;
-
-    case 86401:
-        *hour = 24;
-        *min = 0;
-        *sec = 0;
-        return;
     }
 
     // normal case
@@ -400,15 +392,11 @@ void iso8601_to_clocktime(int* hour, int* min, int* sec, const struct iso8601_da
 
 int iso8601_from_clocktime(struct iso8601_date* date, int hour, int min, int sec)
 {
-    // two special cases: leap second and midnight
+    // special case: leap second
     if(hour == 23 && min == 59 && sec == 60) {
         date->sec = 86400;
         return 0;
     }
-    if(hour == 24 && !min && !sec) {
-        date->sec = 86401;
-        return 0;
-    }
 
     // domain check
     if(hour < 0 || hour > 23 || min < 0 || min > 59 || sec < 0 || sec > 59) {

src/libiso8601/leap.c

@@ -30,7 +30,7 @@ static int leap_second_days[] = {
     729023, // 19951231
     729570, // 19970630
     730119, // 19981231
-    732676 // 19991231
+    732676  // 20051231
 };
 
 
@@ -60,9 +60,6 @@ int iso8601_valid_leap(const struct iso8601_date* date)
         num_ly = sizeof(leap_second_days) / sizeof(int);
         for(i = 0; i < num_ly; ++i) if(leap_second_days[i] == date->day) return 1;
         return 0;
-
-    case 86401: /* 24:00:00 */
-        return !date->nsec;
     }
 
     return 0;

src/libiso8601/manip.c

@@ -11,13 +11,8 @@ void iso8601_add_seconds(struct iso8601_date* date, long seconds)
 {
     ldiv_t qr;
 
-    switch(date->sec) {
-    case 86400:
-    case 86401:
-        --date->sec; 
-        break;
-    }
-    
+    // TODO: leap second support
+
     qr = ldiv(seconds + date->sec, 86400);
     date->day += qr.quot;
     date->sec = qr.rem;

src/libiso8601/print.c

@@ -82,12 +82,6 @@ void iso8601_print(char* str, int amt, const struct iso8601_date* date,
         d = 60;
         break;
 
-    case 86401:
-        y = 24;
-        m = 0;
-        d = 0;
-        break;
-
     default:
         y = dttz.sec / 3600;
         dttz.sec -= y * 3600;

src/libiso8601/types.h

@@ -10,7 +10,7 @@
 struct iso8601_date {
         int32_t nsec;
         int32_t day;
-        int32_t sec; // special values: 86400 == leap second 23:59:60, 86401 == midnight 24:00:00
+        int32_t sec; // special value: 86400 == leap second 23:59:60
 };
 
 enum iso8601_date_prec {