Make gmtime/localtime properly support times near the limits of the time_t range.

They did not properly handle times in 1969 or 2105 (for the latter, they would infinite-loop).
2022-12-29 23:17:24 -06:00 · 2022-12-29 23:17:24 -06:00 · f15caf8096
parent b302a85fd6
commit f15caf8096
1 changed files with 7 additions and 2 deletions
--- a/time.asm
+++ b/time.asm
@ -510,22 +510,27 @@ lb1      plb
         stz   second
 lb1      inc   year
         jsr   factor
+         lda   count+4
+         bne   lb1b
         lda   count+2
         cmp   t+2
         bne   lb1a
         lda   count
         cmp   t
 lb1a     ble   lb1
-         dec   year
+lb1b     dec   year
 lb2      inc   month                    find the month
         jsr   factor
+         lda   count+4
+         bmi   lb2
+         bne   lb2b
         lda   count+2
         cmp   t+2
         bne   lb2a
         lda   count
         cmp   t
 lb2a     ble   lb2
-         dec   month
+lb2b     dec   month
         jsr   factor                   recompute the factor
         lda   year                     set the year
         sta   tm_year