util-lib: make timestamp generation and parsing reversible (#3869)

[elogind.git] / src / basic / time-util.h

diff --git a/src/basic/time-util.h b/src/basic/time-util.h
index f80b6594f54b7779c35e03e0497e55360f5fddc9..aa600099337cb06f40d427b81eb73ee68b721c47 100644 (file)
--- a/src/basic/time-util.h
+++ b/src/basic/time-util.h
@@ -68,7 +68,9 @@ typedef struct triple_timestamp {
 #define USEC_PER_YEAR ((usec_t) (31557600ULL*USEC_PER_SEC))
 #define NSEC_PER_YEAR ((nsec_t) (31557600ULL*NSEC_PER_SEC))
 
-#define FORMAT_TIMESTAMP_MAX ((4*4+1)+11+9+4+1) /* weekdays can be unicode */
+/* We assume a maximum timezone length of 6. TZNAME_MAX is not defined on Linux, but glibc internally initializes this
+ * to 6. Let's rely on that. */
+#define FORMAT_TIMESTAMP_MAX (3+1+10+1+8+1+6+1+6+1)
 #define FORMAT_TIMESTAMP_WIDTH 28 /* when outputting, assume this width */
 #define FORMAT_TIMESTAMP_RELATIVE_MAX 256
 #define FORMAT_TIMESPAN_MAX 64