time/tst-strftime2.c: Make the file easier to maintain

Express the years as full Gregorian years (e.g., 1988 instead of 88)
and months with natural numbers (1-12 rather than 0-11).

Compare actual dates rather than indexes when selecting the era name.

Declare the local variable era as a string character pointer rather
than an array of chars where the actual string is copied which might
lead to potential buffer overflows in future.

Co-authored-by: Rafal Luzynski <digitalfreak@lingonborough.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>

ChangeLog:

	* time/tst-strftime2.c (date_t): Explicitly define the type.
	(dates): Use natural month and year numbers to express a date.
	(is_before): New function to compare dates.
	(mkreftable): Minor improvements to simplify maintenance.
	(do_test): Reflect the changes in dates array.

1 files changed, 9 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 50a00bb40f..55e501e32e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2019-04-02  TAMUKI Shoichi  <tamuki@linet.gr.jp>
+	    Rafal Luzynski  <digitalfreak@lingonborough.com>
+
+	* time/tst-strftime2.c (date_t): Explicitly define the type.
+	(dates): Use natural month and year numbers to express a date.
+	(is_before): New function to compare dates.
+	(mkreftable): Minor improvements to simplify maintenance.
+	(do_test): Reflect the changes in dates array.
+
 2019-04-01  Carlos O'Donell  <carlos@redhat.com>
 
 	* localedata/locales/ja_JP: Add comments to era entries.