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-rw-r--r--absl/time/internal/cctz/src/tzfile.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/absl/time/internal/cctz/src/tzfile.h b/absl/time/internal/cctz/src/tzfile.h
index 31e85982..9613055d 100644
--- a/absl/time/internal/cctz/src/tzfile.h
+++ b/absl/time/internal/cctz/src/tzfile.h
@@ -102,20 +102,24 @@ struct tzhead {
*/
#ifndef TZ_MAX_TIMES
+/* This must be at least 242 for Europe/London with 'zic -b fat'. */
#define TZ_MAX_TIMES 2000
#endif /* !defined TZ_MAX_TIMES */
#ifndef TZ_MAX_TYPES
-/* This must be at least 17 for Europe/Samara and Europe/Vilnius. */
+/* This must be at least 18 for Europe/Vilnius with 'zic -b fat'. */
#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
#endif /* !defined TZ_MAX_TYPES */
#ifndef TZ_MAX_CHARS
+/* This must be at least 40 for America/Anchorage. */
#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
/* (limited by what unsigned chars can hold) */
#endif /* !defined TZ_MAX_CHARS */
#ifndef TZ_MAX_LEAPS
+/* This must be at least 27 for leap seconds from 1972 through mid-2023.
+ There's a plan to discontinue leap seconds by 2035. */
#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
#endif /* !defined TZ_MAX_LEAPS */